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The convention of the weather and climate community has been to calculate the observed daily mean temperature by summing the maximum and minimum instantaneous temperatures during a 24-hour period and dividing by two. However, does this recording method capture and represent the true average temperature over the course of a day? This conventional approach fails to integrate significant behaviors of temperature associated with rapid weather events, frontal passages, sea breezes, and even seasonal temperature variations. It is possible that sampling more frequently and finding a more representative value for daily temperature averages will reveal patterns in which the daily mean temperature skews towards the daily maximum or minimum (i.e., the full-day average temperature is more often closer to the daily maximum or the daily minimum).

Latest Extremes

City, State Temp
West Cape May, NJ 66
Seaside Heights, NJ 63
West Deptford, NJ 63
Jersey City, NJ 63
Pennsauken, NJ 63
City, State Temp
Walpack, NJ 48
Pequest, NJ 48
Hope, NJ 49
Basking Ridge, NJ 49
Hopewell Twp., NJ 50
most current information as of Jun 28 6:36 AM

Latest Conditions & Forecast

New Brunswick, NJ

Rutgers University Meteorology Program

55°F

Wind

0 mph from the NW

Wind Gust

2 mph from the NW

Sunny
80 °F
Mostly Clear
60 °F
Mostly Sunny
86 °F
Partly Cloudy
68 °F
Partly Sunny then Slight Chance T-storms
90 °F
Slight Chance T-storms then Partly Cloudy
70 °F
Partly Sunny then Chance T-storms
89 °F
Chance T-storms
72 °F
Chance T-storms
88 °F
Partly Cloudy
69 °F
Mostly Sunny
88 °F
Mostly Cloudy
68 °F
Chance T-storms
86 °F

Today

Sunny, with a high near 80. Light northwest wind becoming west 6 to 11 mph in the morning.

Tonight

Mostly clear, with a low around 60. Southwest wind around 5 mph becoming calm in the evening.

Thursday

Mostly sunny, with a high near 86. Southwest wind 8 to 15 mph.

Thursday Night

Partly cloudy, with a low around 68. Southwest wind around 13 mph.

Friday

A slight chance of showers and thunderstorms after noon. Partly sunny, with a high near 90. Southwest wind 11 to 13 mph. Chance of precipitation is 20%.

Friday Night

A slight chance of showers and thunderstorms before 10pm. Partly cloudy, with a low around 70. Chance of precipitation is 20%.

Saturday

A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 89. Chance of precipitation is 30%.

Saturday Night

A chance of showers and thunderstorms. Mostly cloudy, with a low around 72. Chance of precipitation is 50%.

Sunday

A chance of showers and thunderstorms. Partly sunny, with a high near 88. Chance of precipitation is 40%.

Sunday Night

Partly cloudy, with a low around 69.

Monday

Mostly sunny, with a high near 88.

Monday Night

Mostly cloudy, with a low around 68.

Independence Day

A chance of showers and thunderstorms. Partly sunny, with a high near 86. Chance of precipitation is 30%.

Search by zipcode or city/state for the latest conditions, forecasts, graphs, maps and more nearest to you.

More News

Bayonne street flooding

It is always comforting to enter the water demand season, namely summer, with a bit of a hydrological cushion. Such is the case this year across NJ, thanks to ample rain and some late-season snow in recent months. This timely precipitation has eliminated drought concerns that stemmed from drier-than-normal intervals during 2016. As a result of the precipitation deficits, ground water, streamflow, and reservoirs all dropped to precarious levels, thus the issuance last fall of a drought warning by the NJ Department of Environmental Protection over northern NJ and a drought watch in some...

Cherry blossom photo

Following a March with the first substantially below-average monthly temperature anomaly in NJ in over a year, April brought a return to record warmth last seen in February. With a statewide average of 56.0°, the month was 5.1° above the 1981–2010 mean. This ranked as the warmest April since statewide records commenced in 1895. Five of the top 10 and nine of the top 20 mildest Aprils of the past 123 years have occurred since 2002. With the warmth of January, February, and April hardly balanced by the colder March, this year is off to the 4th warmest start on record. Only January–April...

Damaged Magnolia

With the Northern Hemisphere atmosphere transitioning from winter to spring, March can be a month of frequently-changing weather with pronounced pressure gradients, thus punctuated by windy conditions. This past March was no exception, and in fact, a windier month would be difficult to find. Winds gusted to 50 mph or greater at one or more NJWxNet station on 11 days and between 40–49 mph on four other days. At most locations, the warmest daily average temperature of the month was, of all things, on March 1st, while the first 80° day of the year was on the 25th. In between those warm spells...

Latest Blog Posts

The following report was written by Eric Davis, a Chatham High School Senior, based on research performed during 1-month internship at the Office of the NJ State Climatologist The convention of the weather and climate community has been to calculate the observed daily mean temperature by summing the maximum and minimum instantaneous temperatures during a 24-hour period and dividing by two....
Radar image
The several-hour-long downpour that drenched parts of Mercer and Middlesex County on the afternoon of July 30, 2016, represented an exceptionally rare event for the area. Afternoon and evening thunderstorms dropped 7.23” in West Windsor (Mercer County), with Plainsboro (Mercer) reporting 5.15”, South Brunswick (Middlesex) 5.03,” and North Brunswick (Middlesex) 4.90”. These rainfall totals were...

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On Average, Rather Average, Bookended by Stormy Conditions: October 2015 Recap

November 6, 2015 - 4:58pm -- Dave Robinson

Waves picture

There were many sides to New Jersey’s October 2015 weather, however, when temperature and rainfall observations were averaged, conditions were quite close to long-term (1981–2010) means. The statewide average temperature of 54.4° was 0.4° below normal. This ranked as the 53rd coolest since 1895 (121 years). Precipitation averaged 4.17", which is 0.24" above normal and ranks as 44th wettest. October was bookended by events that dumped the vast majority of the month’s precipitation, with an extended period of very dry weather in between. This led to a continuation of moderate drought in the northeast, with nearby areas remaining abnormally dry. The late-month rain, which for the first time in many months was heaviest over the driest areas, staved off the need for any further drought deterioration, at least for the time being. The major weather event of the month extended over the first five days, when incessant onshore winds generated the worst beach erosion and back bay flooding since Sandy three years ago, though not nearly in the same ballpark of what Sandy wrought.

Near Record Warmth and Quite Dry…until the 30th: September 2015 Recap

October 4, 2015 - 3:30pm -- Dave Robinson

Wildfire photo

The ninth month of 2015 served as a bookend of sorts to an extended warm season. The average statewide temperature of 70.7° was 4.5° above the 1981–2010 normal and ranks as the 3rd warmest on record (since 1895). This ranking is the same as that achieved in May, with the intervening months all above average, though not nearly as much so as these shoulder months. Five of the ten warmest Septembers have occurred since 2002. A look back at the past five months finds that this most recent May through September interval was the third warmest on record. Even more notable than the recent run of warm Septembers, eight of the top ten warm seasons occurred within the last 18 years and four within the last six years.

What had been a rather dry month with drought concerns ended on a damp note on the 30th with a wet episode that extended into early October. Through the 29th, the month ranked as the 14th driest. However, an approximate statewide-average rainfall of 1.50” on the 30th brought the monthly average to 3.44” (-0.63”) and with it the rank of 63rd driest.

New Jersey Smart Lawn Watering Initiative: Conserving Water Starts With You!

September 15, 2015 - 4:49pm -- Jessica Raff

Grass photo

About 70% of the fresh water used around the world is devoted to irrigation, and a similar figure holds true with respect to New Jersey’s water use. Much of this in New Jersey is put towards lawn watering. It is apparent to anyone paying attention to the frequency and timing of when lawns are watered that, just as research suggests, many New Jersey homeowners are over-irrigating their lawns. This wastes precious water that could be conserved wisely by employing more efficient irrigation methods. This article outlines a simple way that you can participate in our New Jersey Smart Lawn Watering Initiative without investing in new sprinkler equipment or devoting large amounts of time to lawn management. By following the instructions discussed below, you can save water and money, while keeping your lawn green and beautiful.

Consistently Warm and a Mixed Distribution of Precipitation: August & Summer 2015 Recaps

September 2, 2015 - 9:58pm -- Dave Robinson

Dry Reservior

This month had quite a variety of weather conditions around the state. This resulted in some areas experiencing flash flooding and others encroaching drought conditions. Damage resulted from the flooding and one storm even produced a nocturnal “heat burst.” Some minor brush fires and declining river, ground water, and reservoir levels accompanied subnormal rain totals. The dry conditions helped produce some wide daily swings from cool nighttime temperatures to consistently warm daytime maximums. Preliminary values show August 2015 to have a statewide average rainfall of 2.18”. This is 2.03” below normal and ranks as the 13th driest since statewide records commenced in 1895 (Table 1). The 74.5° average temperature was 1.1° above the 1981–2010 mean and ranks 21st warmest.

Leaning Warm, Leaning Dry: July 2015 Recap

August 1, 2015 - 8:23pm -- Dave Robinson

Flooding photo

In most respects, July 2015 was a rather common one in the weather department. The statewide average temperature of 75.5° was 0.5° deg above the 1981–2010 mean. This past June had the same positive anomaly. This ranks as the 28th warmest July since 1895. It may seem strange to have such a small departure from normal yet rank in the top quartile for warmth. This can be explained by the fact that New Jersey has gotten warmer since the end of the 19th century. Compared to all Julys since 1895, this past July was 1.3° above average. Again, this might not seem like a large difference, however, given that temperatures do not vary from year to year nearly as much in summer as in winter, this change over the past century is notable.

With an El Niño underway, how much of an impact can we expect it to have on NJ's summer weather?

July 23, 2015 - 2:29pm -- Dave Robinson

Sea Surface Temperature (SST) anomalies for July 20, 2015.  NOAA/NESDIS.

Scientists are carefully monitoring sea-surface temperatures in the tropical Pacific Ocean for a potential El Niño event. An El Niño occurs when warmer-than-average waters start to form in the eastern Pacific Ocean, specifically near the equatorial latitudes. Easterly winds (blowing from the east) typically move warmer water to the western Pacific (near Indonesia), permitting cooler water to upwell to the surface in the east (near South America). When these winds are weaker, or if they reverse direction, the warm water stays in the eastern Pacific. This difference in sea surface temperatures and winds creates a new dynamic between the ocean and atmosphere, distinctly affecting weather patterns across the world. No two El Niño events are alike; they vary in magnitude and location of the largest temperature anomalies. El Niño events can be classified as Strong, Moderate or Weak.

Drought? What Drought?: June 2015 Recap

July 4, 2015 - 7:34pm -- Dave Robinson

Roll Cloud photo

Toward the end of May, the threat of a significant drought loomed over the Garden State, as May proved to be the 3rd driest on record. Crops were in bad shape or not growing at all, and reservoir levels were declining at a faster than seasonal rate. However, New Jersey had yet to reach the point where average and timely rainfall could not remedy the situation. Not only was this prescription filled, it was done in abundance. June rainfall averaged 8.21" across NJ. This was 4.19" above the 1981-2010 normal and ranked 4th wettest since 1895 (Table 1). It joined four other Junes in the past 13 years to rank in the top eight over this 121-year period. As explained in last month's report, the rains that fell during the daytime and evening hours of May 31st factored into the June total, much as the localized afternoon and evening rains on June 30th (discussed below) will count toward the July total.

Third Warmest and Driest as Drought Concerns Arise, and a Pronounced Transition: May and Spring 2015 Recap

June 4, 2015 - 8:52pm -- Dave Robinson

Sea fog photo

May 2015 was a warm and dry month across New Jersey. As the month ended, drought concerns were looming large, though rainfall in the north during the afternoon and evening of the 31st and continuing into the first days of June resulted in at least a temporary braking of the downward slide. Based on data gathered at long-term National Weather Service Cooperative Observing (COOP) stations, May rainfall averaged 1.08" across NJ. This is 2.92" below the 1981-2010 mean and ranks as the 3rd driest May since records commenced in 1895.

As those who have been reading these monthly narratives for some time now know, precipitation that falls at COOP stations after observation time on the last day of the month gets recorded as falling on the first day of the next month. Most COOP stations observe in the morning, thus the heavy showers that fell across north Jersey on the 31st were not factored into this May average, except for a few stations such as Newark Airport (which registered 3.83" on the 31st alone) that observe at midnight. The last time this situation had a notable impact on monthly rainfall was a daytime heavy rain event on April 30, 2014.

Drought Invading New Jersey

May 28, 2015 - 11:14am -- Dave Robinson

30-Day Percent of Normal Precipitation

Whether it is a browning lawn, dry garden soil, or pollen that hasn’t washed off your car in weeks, many of us in New Jersey have recognized that the state is in the midst of an extended period of very meager rainfall. Along with the aforementioned impacts, the flow of water in streams and ground water levels as monitored in wells are below, and in some cases, well below seasonal levels. While it is fortunate that surface reservoirs in northern and central NJ are close to seasonal levels (quite full), there is less water than normal flowing into them and early season lawn watering is drawing water out of them at an unseasonable pace.

Advice provided by our office, by those within the National Weather Service and the NJ Department of Environmental Protection, and by others associated with the weekly US Drought Monitor has led to this week’s Monitor map depicting the northern third of NJ in D1 (defined as moderate drought) and the remainder of the state down to around the Atlantic City Expressway in D0 (abnormally dry). D1 can be expected to occur once every 5-10 years during a particular month, while D0 can be found every 3-5 years. While the type of conditions being experienced in parts of NJ right now are drought like, I am hesitant to call the north in “moderate” drought, and would prefer saying “minor” drought. However, this is the definition of the nomenclature decided upon by a national committee, thus within the Monitor map it is “moderate” in the north.

Spring Arrives and Remains: April 2015 Recap

May 4, 2015 - 8:36pm -- Dave Robinson

Contrails photo

Complaints are often brought to the Office of the State Climatologist that in recent years the weather in New Jersey has quickly transitioned from winter to summer, thus leaving little time for spring weather. Of course perceptions can be deceiving, as transitional months such as April typically have widely varying weather. At least for April 2015 no protests of a missing spring are warranted, as temperatures reached into the 60°s and 70°s for several days in each week of the month, yet minimums were at times in the 20°s and 30°s throughout April. There was only one major rainfall event, but there were occasional showers. A summer-like squall roared through the state late afternoon on the 22nd, followed the next day by daytime snow flurries. Now that is spring weather!

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