Spring

April 2026 was a month ranking in the top ten for warmth, yet the major weather news of the month was a damaging late-month freeze. Weeks vacillated between warmth and cold, with the warm ones winning out. This thermal whiplash was accompanied by yet another below-normal month of precipitation, making this 21 of the past 24 months with below-normal totals across the Garden State. A Drought Warning issued by the NJ Department of Environmental Protection remains in place.

The 54.4° average April temperature is 2.9° above the 1991–2020 normal. This ties as the 6th mildest since records commenced in 1895. Seven of the ten mildest Aprils have occurred since 2002, with 2006 (12th) and 2025 (13th) not far behind. The average high of 66.4° is 3.7° above normal, ranking 6th mildest, and the average low of 42.4° is 2.1° above normal, ranking 7th mildest. The northern climate division averaged 52.9° (+3.0°, 6th mildest), the southern division 55.5° (+2.9, 6th mildest), and the coastal division 54.2° (+2.5°, 8th mildest).

April precipitation averaged 2.51” across NJ. This is 1.19” below normal and ranks as the 23rd driest. The northern division averaged 2.84” (-1.06”, 39th driest), southern 2.31” (-1.27”, 18th driest), and coastal 2.33” (-1.22”, 25th driest). Northwest areas were closest to normal, with west central and far southern reaches driest. Only trace amounts of snow and sleet were observed in several locations during the month.

It took a frustratingly long time for the cool season “recharge” of New Jersey’s water resources to get well underway. Following a record dry fall 2024, December through April precipitation remained below normal, including the third driest January of the past 131 years. However, February, March, and April precipitation totals were only a bit below normal, so while precipitation deficits were not recovering, they did not worsen, and reservoirs began to fill. Then along came May, with near record-high precipitation, just in time to bring most water resources up to normal heading into summer. Yes, quite a relief! The only cautionary note regards groundwater deficits that remain at some locations in the sandy substrate of south Jersey. This impacts local streamflow as well once runoff from any recent rains has diminished, leaving the streams fed by depleted spring waters. Thus, the NJ Department of Environmental Protection has not lifted the drought warning that was established in mid-November 2024.

As for May, the statewide average precipitation was 7.27”. This was 3.52” above the 1991–2020 normal and ranks as the 5th wettest May since statewide records became established in 1895. It is the wettest May since 1990, and the fifth May this century to fall into the top 25 (three have been in the driest 25).

May temperatures exhibited some notable swings, with the end of the month’s below-normal conditions just about balancing out the above-normal start. The statewide average of 62.0° was 0.8° above normal and ranks as the 30th mildest of the past 131 years. The statewide average high temperature was 71.5°, which was 0.8° below normal and ranked as the 65th warmest/66th coolest on record. Meanwhile, the 52.5° average low was 2.3° above normal, ranking as the 12th mildest. This sign disparity is the result of the frequent cloudy and wet conditions that suppressed both daytime warmth and nighttime cooling.

As spring turns to summer, all in Jersey can be pleased that water supplies are in good shape. Also, while it took some time to become established, by late May, warmer temperatures brought out summer wardrobes. Spring (March–May) conditions will be covered later in this report, but first a look at May. As the title of the monthly portion of this narrative suggests, May 2024 never established a consistent atmospheric pattern. There were plenty of episodes where light to moderate showers dotted the state, but never a broad soaker. Temperatures fluctuated on a weekly basis, without a persistent leaning until warmth prevailed later in the month. Put it all together and May ended on a green note born of somewhat below-normal precipitation and above-normal temperatures. The statewide average temperature of 63.9° was 2.7° above the 1991–2020 normal. This ranks as the 11th mildest May dating back to 1895. This anomaly was driven by elevated minimum temperatures that averaged 54.0° which is 3.8° above normal and ranks as the 4th warmest on record. This no doubt due to persistent nighttime cloud cover. The average high temperature of 73.7° was 1.4° above normal, ranking 35th warmest. The northern climate division averaged 63.0° (+3.1°, 7th warmest). Across the southern division the average temperature was 64.5° (+2.3°, 13th warmest). The coastal division averaged 63.1° (+2.1°, 11th warmest).

So much for March flipping from lion to lamb or vice versa. March 2024 was often a lion throughout, with frequent roaring winds and multiple rain events producing a near-record monthly precipitation total and occasional flooding. The first half of the month ran at a record-warm pace, the monthly average later to be tempered by a second half that was cooler than the first. Still, the month emerged as the 9th mildest on record. Befitting the overall mild conditions, snowfall was scarce to non-existent.

Winds gusted to 35 mph or higher at one or more Rutgers NJ Weather Network (NJWxNet) station on 16 days, exceeding 40 mph on 11 of those days. Precipitation (rain and the water equivalent of the very little snow that fell) averaged 7.76” across the state. This is 3.56” above the 1991–2020 normal and ranks as the third wettest March since records commenced in 1895. The northwest was least wet with 6.00”–7.00” falling. Totals increased to the southeast where near coastal areas received 9.00”–10.00”. The northern climate division averaged 7.01” (+3.00, 6th wettest), the southern division 8.15” (+3.83”, 3rd wettest), and the coastal division 8.98” (+4.56, 2nd wettest).

The statewide average March temperature was 46.0°. This is 5.0° above normal and ranks as the 9th mildest of the past 130 years. The average high temperature of 55.6° was 4.7° above normal and ranks 10th mildest. The average low of 36.3° was 5.1° above normal and ranks 4th mildest. The northern division averaged 43.9° (+5.1°, 9th mildest), southern division 47.2° (+4.8°, 8th mildest), and coastal division 47.0° (+4.8°, 7th mildest).

What can you say about a month that began with a swarm of tornadoes, finished with flooding rain, and in between, featured record heat, wildfires, and increasing drought concerns? Best to say that it was an odd one! Fitting this theme, the statewide average temperature of 55.4° was 3.9° above the 1991–2020 normal. This ranks as the third warmest April on record (since 1895) only behind 2017 and 2010 for top honors. April was the fifth month of the past ten ranking in the top 10, joining July (#7), August (#1), January (#1), and February (#5). The first four months of 2023 come in as the warmest start of the year on record with an average of 44.4°. This exceeds the previous record of 44.2° in 2012, with seven of the 10 warmest January–April periods (1895–present) occurring since 2002. The average April maximum temperature across NJ was 67.4° (+4.7°, 3rd warmest) and the average minimum was 43.4° (+3.1°, 5th warmest). Northern counties averaged 53.5° in April (+3.6°, 5th warmest), southern counties 56.6° (+4.0, 2nd warmest), and the coastal zone 55.8° (+4.1°, 2nd warmest).

April precipitation averaged 5.84” across New Jersey. This was 2.14” above normal, ranking as the 10th wettest on record. It was the wettest April since 2007 and second wettest since 1983. All but scattered areas in the northwest received above-normal precipitation, the greatest amounts falling near the Atlantic and Delaware Bay coasts. Northern counties averaged 5.55” (+1.65”, 26th wettest), southern counties 6.04” (+2.49”, 7th wettest), and the coastal zone 5.94” (+2.39”, 10th wettest). It is important to note that these totals and those for individual stations in the next section, do not include heavy rain that fell after standard early morning observation times at CoCoRaHS and National Weather Service Cooperative stations on April 30th. These rains were reported in morning observations on May 1st, thus will be included in May totals.