Saint Joseph County (South Bend)
September
Weather in Saint Joseph County, Indiana for September 2025
Your guide to Saint Joseph County weather in September - trends and predictions
Until now, September 2025 in Saint Joseph County is cooler than usual, with temperatures averaging 22.5 °F, this is -2.3 °F below the typical seasonal average.
The forecast for the coming days of September 2025 predicts a temperature of 30.9 °F , which is warmer than usual.
In general, the average temperature in Saint Joseph County at the beginning of September is 22.9 °F. As the month progressed, temperatures tended to significantly warm up, reaching an average of 30 °F by the end of September.
With an average of 3 rainy days, Saint Joseph County experiences minimal rainfall in September.
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Temperatures
Rain 🌧️
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27
Dry days
3
Rainy days
0
Snow days
26°/13°
Temperatures
19 km/h
Avg max wind
63 %
Avg humidity
Saint Joseph County Weather September
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Temperatures trend during September in Saint Joseph County
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September weather in Saint Joseph County day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Partly cloudy | 25° /12° | 0 mm | 7 | |
| Sept. 2 |  Sunny | 25° /10° | 0 mm | 7 | |
| Sept. 3 | Sunny | 26° /11° | 4.4 mm | 7 | |
| Sept. 4 | Sunny | 23° /11° | 12.6 mm | 6 | |
| Sept. 5 | Partly cloudy | 24° /12° | 0 mm | 6 | |
| Sept. 6 |  Light rain shower | 19° /11° | 2.9 mm | 5 | |
| Sept. 7 | Patchy rain possible | 18° /10° | 0 mm | 4 | |
| Sept. 8 | Sunny | 21° /6° | 0 mm | 6 | |
| Sept. 9 | Sunny | 25° /8° | 0 mm | 6 | |
| Sept. 10 | Sunny | 28° /12° | 0 mm | 7 | |
| Sept. 11 | Partly cloudy | 29° /14° | 0 mm | 8 | |
| Sept. 12 | Sunny | 30° /13° | 0 mm | 7 | |
| Sept. 13 |  Overcast | 29° /16° | 24.9 mm | 7 | |
| Sept. 14 | Sunny | 30° /16° | 0 mm | 7 | |
| Sept. 15 | Sunny | 31° /12° | 0 mm | 1.5 | |
| Sept. 16 | Sunny | 30° /12° | 0 mm | 1.4 | |
| Sept. 17 | Partly cloudy | 28° /15° | 0 mm | 1.4 | |
| Sept. 18 | Sunny | 33° /16° | 0 mm | 1.4 | |
| Sept. 19 | Sunny | 34° /16° | 0 mm | 0 | |
| Sept. 20 | Partly cloudy | 29° /14° | 0 mm | 6 | |
| Sept. 21 | Patchy rain possible | 27° /17° | 2 mm | 5 | |
| Sept. 22 | Patchy rain possible | 26° /17° | 0.4 mm | 5 | |
| Sept. 23 | Patchy rain possible | 29° /17° | 0.6 mm | 5 | |
| Sept. 24 | Sunny | 29° /14° | 0 mm | 6 | |
| Sept. 25 | Sunny | 34° /15° | 0 mm | 6 | |
| Sept. 26 | Sunny | 35° /18° | 0 mm | 7 | |
| Sept. 27 | Sunny | 35° /18° | 0 mm | 7 | |
| Sept. 28 | Sunny | 33° /17° | 0 mm | 6 | |
| Sept. 29 | Overcast | 23° /16° | 0 mm | 5 | |
| Sept. 30 | Overcast | 21° /18° | 0 mm | 5 | |
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Important Notice
Our weather forecast for Saint Joseph County 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 Saint Joseph County forecast closer to your planned date for the most up-to-date weather information.
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Saint Joseph County in September - FAQ
What are the expected maximum and minimum temperatures in Saint Joseph County during September?
Enjoy moderate daytime temperatures of up to 26° and cooler nights around 13°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Saint Joseph County during September?
Expect minimal rainfall in Saint Joseph County during September, with a total of 17.6 mm over approximately 3 days. This minimal precipitation is unlikely to significantly impact plans.
What are the typical wind conditions in Saint Joseph County during September?
The average wind speed in Saint Joseph County during September is 19 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Saint Joseph County
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UV exposure in Saint Joseph County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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Where is Saint Joseph County?Get accurate weather forecasts for Saint Joseph County, located at latitude 41.683 and longitude -86.25. Stay updated with localized weather information tailored for Saint Joseph County.
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