Weather in Grand Rapids, Michigan for September 2026
So far, September 2026 in Grand Rapids shows a warmer trend than usual by 2.8 °F.
Expect cooler weather in the next days in Grand Rapids with the forecast suggesting a temperature of 23.4 °F, lower than the historical average.
In general, the average temperature in Grand Rapids at the beginning of September is 26.6 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 22.6 °F by the end of September.
The climate of Grand Rapids in September is notably wet, with an average of 14 rainy days, and a total of 79.1 mm of precipitation.
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Grand Rapids Weather September
Temperatures trend during September in Grand Rapids
September weather in Grand Rapids day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Sunny | 29° /13° | 0 mm | 7 | |
| Sept. 2 | Sunny | 28° /15° | 0.5 mm | 6 | |
| Sept. 3 |  Moderate rain at times | 28° /15° | 9.6 mm | 6 | |
| Sept. 4 | Sunny | 26° /14° | 78.2 mm | 6 | |
| Sept. 5 |  Patchy rain possible | 27° /15° | 1.1 mm | 6 | |
| Sept. 6 | Sunny | 24° /13° | 2.1 mm | 6 | |
| Sept. 7 | Sunny | 24° /11° | 3.9 mm | 6 | |
| Sept. 8 | Sunny | 24° /11° | 0 mm | 5 | |
| Sept. 9 | Sunny | 26° /13° | 2.3 mm | 6 | |
| Sept. 10 |  Overcast | 27° /13° | 0.1 mm | 6 | |
| Sept. 11 | Sunny | 29° /10° | 0 mm | 6.3 | |
| Sept. 12 | Sunny | 28° /16° | 0.3 mm | 5.8 | |
| Sept. 13 | Overcast | 25° /14° | 0.1 mm | 5.7 | |
| Sept. 14 | Overcast | 21° /10° | 0.3 mm | 4 | |
| Sept. 15 | Patchy rain possible | 24° /17° | 4.6 mm | 5 | |
| Sept. 16 |  Fog | 19° /16° | 6.4 mm | 4 | |
| Sept. 17 | Overcast | 18° /11° | 0 mm | 5 | |
| Sept. 18 | Sunny | 18° /9° | 0 mm | 5 | |
| Sept. 19 | Sunny | 22° /11° | 0 mm | 6 | |
| Sept. 20 | Sunny | 23° /14° | 0 mm | 6 | |
| Sept. 21 | Sunny | 25° /14° | 0 mm | 6 | |
| Sept. 22 | Sunny | 25° /13° | 0 mm | 6 | |
| Sept. 23 | Sunny | 25° /14° | 0 mm | 6 | |
| Sept. 24 | Sunny | 25° /15° | 0.6 mm | 5 | |
| Sept. 25 | Mist | 21° /12° | 2.2 mm | 5 | |
| Sept. 26 | Fog | 22° /10° | 1.5 mm | 5 | |
| Sept. 27 | Sunny | 22° /12° | 2.9 mm | 5 | |
| Sept. 28 | Patchy rain possible | 21° /11° | 0.2 mm | 5 | |
| Sept. 29 | Sunny | 23° /11° | 0 mm | 6 | |
| Sept. 30 | Mist | 24° /11° | 0 mm | 6 | |
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Grand Rapids in September - FAQ
What are the expected maximum and minimum temperatures in Grand Rapids during September?
How much rainfall should be expected in Grand Rapids during September?
What are the typical wind conditions in Grand Rapids during September?
September rainfall patterns in Grand Rapids
UV exposure in Grand Rapids during September
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