Mason County (Lake Michigan)
September
Weather in Mason County, Michigan for September 2025
Your guide to Mason County weather in September - trends and predictions
Expect cooler weather in first days of September 2025 in Mason County with the forecast suggesting a temperature of 21.6 °F, lower than the historical average.
In general, the average temperature in Mason County at the beginning of September is 23 °F. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 20.1 °F by the end of September.
Mason County experiences moderate rainfall in September, with an average of 7 rainy days and a total precipitation of 47.6 mm.
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Temperatures
Rain 🌧️
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23
Dry days
7
Rainy days
0
Snow days
22°/15°
Temperatures
21 km/h
Avg max wind
71 %
Avg humidity
Mason County Weather September
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Temperatures trend during September in Mason County
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September weather in Mason County day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Sunny | 23° /15° | 0 mm | 5 | |
| Sept. 2 | Sunny | 23° /17° | 0 mm | 5 | |
| Sept. 3 |  Patchy rain possible | 24° /18° | 2.8 mm | 5 | |
| Sept. 4 | Patchy rain possible | 22° /19° | 0.1 mm | 5 | |
| Sept. 5 |  Partly cloudy | 20° /16° | 0 mm | 5 | |
| Sept. 6 | Sunny | 23° /13° | 0 mm | 5 | |
| Sept. 7 | Patchy rain possible | 26° /15° | 1.3 mm | 4 | |
| Sept. 8 | Partly cloudy | 20° /12° | 0 mm | 6 | |
| Sept. 9 | Sunny | 21° /15° | 0 mm | 6 | |
| Sept. 10 | Sunny | 22° /14° | 0 mm | 6 | |
| Sept. 11 |  Cloudy | 23° /17° | 0 mm | 5 | |
| Sept. 12 | Sunny | 25° /17° | 0 mm | 7 | |
| Sept. 13 | Sunny | 28° /17° | 0 mm | 7 | |
| Sept. 14 | Sunny | 26° /17° | 0 mm | 7 | |
| Sept. 15 | Sunny | 24° /18° | 0 mm | 6 | |
| Sept. 16 | Sunny | 24° /17° | 0 mm | 6 | |
| Sept. 17 |  Overcast | 24° /16° | 0 mm | 5 | |
| Sept. 18 | Partly cloudy | 22° /15° | 0 mm | 6 | |
| Sept. 19 | Overcast | 22° /15° | 0 mm | 5 | |
| Sept. 20 |  Moderate rain at times | 22° /19° | 2 mm | 5 | |
| Sept. 21 | Overcast | 21° /17° | 0 mm | 5 | |
| Sept. 22 | Moderate or heavy rain shower | 21° /16° | 7.5 mm | 5 | |
| Sept. 23 | Partly cloudy | 19° /14° | 0 mm | 5 | |
| Sept. 24 | Moderate or heavy rain shower | 19° /12° | 19.7 mm | 4 | |
| Sept. 25 | Patchy rain possible | 20° /16° | 2.6 mm | 5 | |
| Sept. 26 | Overcast | 19° /14° | 0 mm | 4 | |
| Sept. 27 | Sunny | 22° /14° | 0 mm | 6 | |
| Sept. 28 | Sunny | 21° /14° | 0 mm | 6 | |
| Sept. 29 | Partly cloudy | 20° /13° | 0 mm | 6 | |
| Sept. 30 | Overcast | 20° /15° | 0 mm | 5 | |
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Important Notice
Our weather forecast for Mason 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 Mason County forecast closer to your planned date for the most up-to-date weather information.
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Mason County in September - FAQ
What are the expected maximum and minimum temperatures in Mason County during September?
During September, expect a variety of temperatures with highs around 22° and lows near 15°, suitable for diverse activities and preferences.
How much rainfall should be expected in Mason County during September?
In September, Mason County can expect light to moderate rainfall, totaling 47.6 mm across approximately 7 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in Mason County during September?
The average wind speed in Mason County during September is 21 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Mason County
Explore the daily rainfall trends and prepare for Mason Countys September weather 💧
UV exposure in Mason County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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Where is Mason County?Get accurate weather forecasts for Mason County, located at latitude 44.008 and longitude -86.757. Stay updated with localized weather information tailored for Mason County.
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