GWC’s Weather Week That Was – June 22-28, 2025
GWC’s Weather Week That Was – June 22-28, 2025
Location: South Plainfield, NJ
Latitude: 40.58 N
Longitude: 74.42 W
| Date | High Temp | Low Temp | Diurnal Range | Rainfall | Peak Rainfall Rate | High Pressure | Low Pressure | Pressure Change |
| 6/22/2025 | 88 | 70 | 18 | 0.03 | 0.04 | 30.11 | 29.95 | 0.16 |
| 6/23/2025 | 99 | 75 | 24 | 0.00 | 0.00 | 30.06 | 30.05 | 0.01 |
| 6/24/2025 | 100 | 75 | 25 | 0.00 | 0.00 | 30.09 | 29.98 | 0.11 |
| 6/25/2025 | 98 | 73 | 25 | 0.00 | 0.00 | 30.02 | 29.92 | 0.10 |
| 6/26/2025 | 81 | 67 | 14 | 0.00 | 0.00 | 30.11 | 29.94 | 0.17 |
| 6/27/2025 | 68 | 64 | 4 | 0.00 | 0.00 | 30.22 | 30.12 | 0.10 |
| 6/28/2025 | 87 | 63 | 24 | 0.05 | 0.04 | 30.14 | 29.91 | 0.23 |
Temperature for the Week of June 22-28, 2025
- Average High Temperature: 88.7°
- Max Temperature: 100° on June 24th
- Min Temperature: 63° on June 28th
Diurnal Range for the Week of June 22-28, 2025
NOTE: The diurnal range of temperature is the difference between the high temperature and the low temperature on a given day.
- Average Diurnal Range of Temperature: 19.1°
- Max Diurnal Range: 25° on June 24th and 25th
- Min Diurnal Range: 4° on June 27th
Rainfall for the Week of June 22-28, 2025
- Average Daily Rainfall: 0.01 inches
- Max Rainfall: 0.05 inches on June 28th
- Min Rainfall: 0.00 inches on June 23rd, 24th, 25th, 26th, and 27th
- Peak Rainfall Rate: 0.04 inches per hour on June 22nd and 28th
Pressure for the Week of June 22-28, 2025
- Max Pressure: 30.22 on June 27th
- Min Pressure: 29.91 on June 28th
- Largest Pressure Drop: 0.31 of an inch or 10.3 millibars from 12:17 PM on June 27th to 7:11 PM on June 28th.
- Largest Pressure Rise: 0.30 of an inch or 10.0 millibars from 5:51 PM on June 25th to 12:17 PM on June 27th.
Summary
The fourth full week of June 2025 was the warmest and one of the driest to date this year at Greg’s Weather Center. There were six days of at least 80° weather. The average high temperature for the week was just shy of 89° while the average low was just below 70. Included in this warm stretch was the first heat wave of the year and the first 100° day at GWC in nearly 13 years.
There were only two days of measurable rainfall that totaled 0.08 of an inch for the entire week. Only one week, the period from April 27th to May 3rd, 2025, had fewer days with measurable rainfall, but there was still more rain that week. This week was the driest of the year to date in terms of total rainfall.
For the third straight week, there was a day with a diurnal range of temperature of just four degrees. June 27th had the lowest maximum temperature of just 68° after a low of only 64 earlier in the day. Similar to the previous week, there wasn’t much tumult with the barometer until the very end of the week. Wild swings in pressure began to occur late on June 25th and lasted for almost 50 hours.
The big story of the week was the heat and lack of rain. There were no storms. The number of 80° days for the year grew to 25 while the number of 90° days quadrupled. The heatwave peaked on June 24th with a high of 100°. The heat index topped out at 116°. However, the highest heat index occurred the day before, on June 23rd, at 120°. The average high during the three-day heat onslaught was 99°.