GWC Monthly Summary – April 2025
Review – April 2025 – Dry and Wild Finish to the Month
The month of April 2025 started very wet but then turned quite arid at Greg’s Weather Center. April 2025 began with measurable rainfall on 7 of the first 8 days and 9 of the initial 12 days of the month. Then, the wet weather pattern switched to a mostly dry pattern. There was no measurable rain on 15 of the last 18 days of the month. Consequently, the dry and more breezy conditions created an atmosphere prime for wildfires. In addition, temperatures were on the rise, and threats of severe storms developed.
View Local Climatological Data – Greg’s Weather Center – April 2025
Rainfall – April 2025
Despite the dry ending, April 2025 still managed to end up as the second wettest month of the year to date. A little more than 92 percent of the monthly rainfall was accumulated over the initial twelve days of the month.
The wettest period of the month was on April 11-12 when 1.44 inches of rain fell. There was measurable rain on 12 of the 30 days during the month. Of those 12 days, there were seven with rainfall over a tenth of an inch.
The most significant rain events were on April 11-12 (1.44 inches), April 6-7 (0.43 of an inch), and April 4-5 (0.24 of an inch). Read more about the dry finish to the month at GWC in the blog.
| Date | Total Rainfall |
| April 11-12, 2025 | 1.44 inches |
| April 6-7, 2025 | 0.43 inches |
| April 4-5, 2025 | 0.24 inches |
| April 26, 2025 | 0.14 inches |
| April 1, 2025 | 0.12 inches |
| April 14, 2025 | 0.04 inches |
| April 3, 2025 | 0.03 inches |
| April 8, 2025 | 0.01 inches |
| April 15, 2025 | 0.01 inches |
Wind – April 2025
While rainfall declined and temperatures rose during April 2025, winds remained gusty. The winds may have not been as gusty as they were in February or March, but they were still high and contributed to problems not only at GWC but also around the state as well.
The periods of April 15-16 and April 27th were the most notable. High winds developed across Western Jersey and progressed across the state on the 15th and 16th. GWC was at Spruce Run in Hunterdon County as storms fired up in Eastern Pennsylvania thanks to a temperature gradient, and winds gusted to gale and tropical storm force.
Following storms on April 26th, a pressure gradient produced strong winds across the Garden State and even downed a tree in GWC’s backyard. For more details, read about the wild weather that ended the month in the blog.
Temperature – April 2025
Temperatures began to increase from the middle of the month on. Following an unsettled and wet first two weeks of April 2025, things dried out and temperatures rose.
There were five days of 80-degree weather over the last 12 days of the month. Three of those days occurred during the week of April 20-26. The highest temperature was 85 on April 19th. The lowest temperature of the month occurred on April 9th with a morning low of 28.
There was only one day when the low temperature for the day was below freezing. Meanwhile, there were 17 days where the high temperature of the day was above 60. Eleven of those days had highs above 70 degrees.
The average high for the month was 64 degrees while the average low was 43. The average temperature for April 2025 was 54 degrees. Looking at the diurnal temperature range, the average for the month was 21 degrees.
Pressure – April 2025
The average barometric pressure for the month was 29.93 inches of Hg or 1014 millibars at GWC. The lowest pressure was 29.35 inches or 994 millibars on April 15th while the highest was 30.46 inches or 1031 millibars on April 2nd. Before the strong storms produced high winds across Eastern Pennsylvania and Western New Jersey on April 15th, the barometer fell 0.55 of an inch or a little more than 18 millibars over two days.
Strong storms also developed during the late afternoon and early evening of April 26th. Although the cold front responsible for the severe weather only produced thundershowers that brought 0.14 of an inch of rain to GWC, it did create a tornadic cell near Seaside Heights in Ocean County and hail, high winds, and heavy downpours in North Jersey locales such as Pompton Lakes.
