Delaware (Wilmington)
September
Weather in Delaware for September 2027
Your guide to Delaware weather in September - trends and predictions
The climate of Delaware in September is notably wet, with an average of 11 rainy days, and a total of 184.4 mm of precipitation.
Is September a good time to visit Delaware? check out the best time to travel to Delaware page.
✨ Is September a good time to visit Delaware? – Ask the AI Weatherman
Rain 🌧️
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19
Dry days
11
Rainy days
0
Snow days
25°/17°
Temperatures
15 km/h
Avg max wind
72 %
Avg humidity
Delaware Weather September
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What’s the Weather Like in Delaware This September?
Discover the average temperatures and weather trends across Delaware’s cities this September.
Temperatures trend during September in Delaware
See the weather trend as well as the moving average line
September weather in Delaware day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Overcast | 30° /19° | 0.2 mm | 4 | |
| Sept. 2 |  Light rain | 26° /19° | 2.9 mm | 5 | |
| Sept. 3 | Light rain | 27° /18° | 5.7 mm | 4 | |
| Sept. 4 |  Patchy rain possible | 30° /19° | 1 mm | 8 | |
| Sept. 5 |  Moderate rain | 30° /19° | 11.3 mm | 7 | |
| Sept. 6 | Moderate rain | 30° /19° | 10.9 mm | 8 | |
| Sept. 7 |  Heavy rain | 24° /15° | 40.8 mm | 6 | |
| Sept. 8 |  Sunny | 26° /13° | 0 mm | 7.8 | |
| Sept. 9 |  Cloudy | 27° /16° | 0 mm | 7 | |
| Sept. 10 | Overcast | 26° /19° | 0.1 mm | 3 | |
| Sept. 11 | Patchy rain possible | 28° /19° | 1.5 mm | 4 | |
| Sept. 12 |  Partly cloudy | 26° /16° | 0 mm | 6 | |
| Sept. 13 | Light rain | 27° /19° | 8.1 mm | 5 | |
| Sept. 14 | Overcast | 26° /18° | 0.3 mm | 7 | |
| Sept. 15 | Patchy rain possible | 25° /16° | 1.8 mm | 7 | |
| Sept. 16 | Overcast | 26° /16° | 0 mm | 7 | |
| Sept. 17 | Moderate rain | 24° /17° | 11.7 mm | 3 | |
| Sept. 18 | Overcast | 27° /19° | 0.4 mm | 4 | |
| Sept. 19 | Partly cloudy | 27° /17° | 0 mm | 5 | |
| Sept. 20 | Light rain | 22° /17° | 9.8 mm | 2 | |
| Sept. 21 | Overcast | 22° /16° | 0.8 mm | 2 | |
| Sept. 22 | Light rain | 21° /15° | 6.2 mm | 2 | |
| Sept. 23 |  Fog | 24° /15° | 0.8 mm | 2 | |
| Sept. 24 | Mist | 23° /15° | 0 mm | 3 | |
| Sept. 25 | Moderate rain | 23° /15° | 20.2 mm | 1 | |
| Sept. 26 | Light rain | 21° /16° | 9.8 mm | 3 | |
| Sept. 27 | Moderate rain | 21° /14° | 17.9 mm | 3 | |
| Sept. 28 | Moderate rain | 19° /16° | 21.7 mm | 1 | |
| Sept. 29 | Fog | 23° /17° | 0 mm | 2 | |
| Sept. 30 | Overcast | 25° /17° | 0.3 mm | 1 | |
| Next | |||||
Important Notice
Our weather forecast for Delaware 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 Delaware forecast closer to your planned date for the most up-to-date weather information.
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Delaware in September - FAQ
What are the expected maximum and minimum temperatures in Delaware during September?
During September, expect a variety of temperatures with highs around 25° and lows near 17°, suitable for diverse activities and preferences.
How much rainfall should be expected in Delaware during September?
Significant rainfall exceeding 184.4 mm is expected in Delaware during September, occurring over more than 11 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Delaware during September?
The average wind speed in Delaware during September is 15 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Delaware
Explore the daily rainfall trends and prepare for Delawares September weather 💧
Typically, Delaware has 11 rainy days in September with a total of 184.4 mm of rainfall.
UV exposure in Delaware during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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