Weather in Lafayette, Indiana for September 2026
Flood Advisory - See hour by hour.
So far, September 2026 in Lafayette shows a warmer trend than usual by 2.4 °F.
Expect cooler weather in the next days in Lafayette with the forecast suggesting a temperature of 24.1 °F, lower than the historical average.
In general, the average temperature in Lafayette at the beginning of September is 28.3 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 21 °F by the end of September.
Lafayette experiences moderate rainfall in September, with an average of 6 rainy days and a total precipitation of 91.7 mm.
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Lafayette Weather September
Temperatures trend during September in Lafayette
September weather in Lafayette day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Mist | 30° /14° | 0 mm | 7 | |
| Sept. 2 | Mist | 30° /16° | 0 mm | 7 | |
| Sept. 3 |  Moderate rain at times | 31° /17° | 3 mm | 7 | |
| Sept. 4 | Mist | 28° /17° | 5.8 mm | 7 | |
| Sept. 5 |  Overcast | 28° /15° | 0 mm | 6 | |
| Sept. 6 | Mist | 25° /12° | 0 mm | 6 | |
| Sept. 7 |  Partly cloudy | 26° /11° | 0 mm | 7 | |
| Sept. 8 |  Sunny | 26° /10° | 0 mm | 6 | |
| Sept. 9 |  Cloudy | 25° /14° | 2.7 mm | 4 | |
| Sept. 10 | Partly cloudy | 25° /15° | 0.6 mm | 4 | |
| Sept. 11 | Cloudy | 28° /15° | 0 mm | 5 | |
| Sept. 12 | Overcast | 30° /15° | 1 mm | 4 | |
| Sept. 13 |  Thundery outbreaks possible | 25° /15° | 0 mm | 6 | |
| Sept. 14 | Thundery outbreaks possible | 28° /15° | 0 mm | 7 | |
| Sept. 15 | Fog | 31° /16° | 0 mm | 7 | |
| Sept. 16 |  Light rain shower | 28° /20° | 12.4 mm | 6.5 | |
| Sept. 17 | Mist | 27° /22° | 0.9 mm | 3.8 | |
| Sept. 18 | Mist | 25° /19° | 0.7 mm | 4 | |
| Sept. 19 | Patchy rain possible | 27° /20° | 8.8 mm | 5.5 | |
| Sept. 20 | Light rain shower | 30° /22° | 2 mm | 7 | |
| Sept. 21 | Overcast | 28° /19° | 0 mm | 7 | |
| Sept. 22 | Mist | 26° /18° | 0 mm | 7 | |
| Sept. 23 | Partly cloudy | 28° /18° | 0 mm | 7 | |
| Sept. 24 | Overcast | 24° /19° | 6.6 mm | 5 | |
| Sept. 25 | Patchy rain possible | 22° /17° | 26.6 mm | 5 | |
| Sept. 26 | Sunny | 21° /14° | 2.8 mm | 6 | |
| Sept. 27 | Sunny | 17° /10° | 0.1 mm | 5 | |
| Sept. 28 | Sunny | 17° /8° | 0 mm | 5 | |
| Sept. 29 | Sunny | 17° /8° | 0 mm | 5 | |
| Sept. 30 | Mist | 29° /13° | 0 mm | 6 | |
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Lafayette in September - FAQ
What are the expected maximum and minimum temperatures in Lafayette during September?
How much rainfall should be expected in Lafayette during September?
What are the typical wind conditions in Lafayette during September?
September rainfall patterns in Lafayette
UV exposure in Lafayette during September
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Where is Lafayette?Get accurate weather forecasts for Lafayette, located at latitude 40.417 and longitude -86.875. Stay updated with localized weather information tailored for Lafayette.