Newark (DE)
September
Weather in Newark, Delaware for September 2025
Your guide to Newark weather in September - trends and predictions
Until now, September 2025 in Newark is slightly cooler than the historical average by -1.6 °F.
The forecast for the next days in Newark predicts temperatures to be around 25 °F, close to the historical average.
In general, the average temperature in Newark at the beginning of September is 28.3 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 25.1 °F by the end of September.
Newark in September brings notable rainfall, with an average of 17 rainy days and a total precipitation of 223.9 mm.
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Temperatures
Rain 🌧️
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13
Dry days
17
Rainy days
0
Snow days
25°/15°
Temperatures
15 km/h
Avg max wind
74 %
Avg humidity
Newark Weather September
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Temperatures trend during September in Newark
See the weather trend as well as the moving average line
September weather in Newark day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Sunny | 27° /16° | 1.5 mm | 6 | |
| Sept. 2 | Sunny | 27° /15° | 0 mm | 6 | |
| Sept. 3 |  Partly cloudy | 26° /14° | 0 mm | 6 | |
| Sept. 4 |  Thundery outbreaks possible | 30° /16° | 0 mm | 6 | |
| Sept. 5 |  Cloudy | 31° /18° | 6.1 mm | 7 | |
| Sept. 6 | Sunny | 31° /20° | 7.4 mm | 7 | |
| Sept. 7 | Thundery outbreaks possible | 26° /16° | 25.9 mm | 6 | |
| Sept. 8 | Sunny | 27° /13° | 2.2 mm | 7 | |
| Sept. 9 | Thundery outbreaks possible | 26° /14° | 5.4 mm | 6 | |
| Sept. 10 |  Moderate or heavy rain shower | 26° /16° | 4.7 mm | 6 | |
| Sept. 11 |  Light rain shower | 27° /16° | 1.9 mm | 7 | |
| Sept. 12 | Moderate rain at times | 28° /16° | 1.2 mm | 7 | |
| Sept. 13 |  Torrential rain shower | 26° /16° | 7.9 mm | 6 | |
| Sept. 14 | Sunny | 28° /16° | 0 mm | 7 | |
| Sept. 15 | Sunny | 27° /14° | 0 mm | 7 | |
| Sept. 16 |  Overcast | 25° /13° | 0 mm | 6 | |
| Sept. 17 |  Moderate rain | 22° /15° | 4 mm | 5 | |
| Sept. 18 | Partly cloudy | 30° /17° | 0 mm | 1.2 | |
| Sept. 19 | Sunny | 32° /16° | 0 mm | 1.4 | |
| Sept. 20 | Cloudy | 20° /17° | 0 mm | 1.4 | |
| Sept. 21 | Patchy rain possible | 21° /17° | 4.5 mm | 0.4 | |
| Sept. 22 | Cloudy | 26° /14° | 0 mm | 0 | |
| Sept. 23 | Patchy rain possible | 28° /17° | 0.2 mm | 5 | |
| Sept. 24 | Patchy rain possible | 28° /20° | 0.8 mm | 5 | |
| Sept. 25 | Overcast | 23° /19° | 0.1 mm | 5 | |
| Sept. 26 | Patchy rain possible | 22° /18° | 0 mm | 4 | |
| Sept. 27 | Patchy rain possible | 24° /18° | 0.1 mm | 5 | |
| Sept. 28 | Patchy rain possible | 31° /19° | 0.2 mm | 5 | |
| Sept. 29 | Patchy rain possible | 31° /20° | 0.9 mm | 5 | |
| Sept. 30 | Patchy rain possible | 17° /16° | 3.9 mm | 4 | |
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Important Notice
Our weather forecast for Newark in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Newark forecast closer to your planned date for the most up-to-date weather information.
Change Month
Newark in September - FAQ
What are the expected maximum and minimum temperatures in Newark during September?
During September, expect a variety of temperatures with highs around 25° and lows near 15°, suitable for diverse activities and preferences.
How much rainfall should be expected in Newark during September?
Significant rainfall exceeding 223.9 mm is expected in Newark during September, occurring over more than 17 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Newark during September?
The average wind speed in Newark during September is 15 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Newark
Explore the daily rainfall trends and prepare for Newarks September weather 💧
UV exposure in Newark during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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