Saint Mary's County (California)
September
Weather in Saint Mary's County, Maryland for September 2026
Your guide to Saint Mary's County weather in September - trends and predictions
So far, September 2026 in Saint Mary's County shows a warmer trend than usual by 3.1 °F.
The forecast for the next days in Saint Mary's County predicts temperatures to be around 22 °F, close to the historical average.
In general, the average temperature in Saint Mary's County at the beginning of September is 28.7 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 21.3 °F by the end of September.
Saint Mary's County experiences moderate rainfall in September, with an average of 9 rainy days and a total precipitation of 87.3 mm.
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Temperatures
Rain 🌧️
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21
Dry days
9
Rainy days
0
Snow days
24°/19°
Temperatures
20 km/h
Avg max wind
79 %
Avg humidity
Saint Mary's County Weather September
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Temperatures trend during September in Saint Mary's County
See the weather trend as well as the moving average line
September weather in Saint Mary's County day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Partly cloudy | 30° /20° | 0 mm | 8 | |
| Sept. 2 |  Sunny | 29° /20° | 0 mm | 8 | |
| Sept. 3 | Partly cloudy | 31° /20° | 0 mm | 8 | |
| Sept. 4 | Partly cloudy | 30° /21° | 11.2 mm | 8 | |
| Sept. 5 |  Moderate rain at times | 28° /21° | 1.9 mm | 6 | |
| Sept. 6 | Partly cloudy | 28° /20° | 6.3 mm | 8 | |
| Sept. 7 |  Overcast | 25° /17° | 2.2 mm | 7 | |
| Sept. 8 | Sunny | 27° /17° | 0 mm | 7 | |
| Sept. 9 | Overcast | 27° /18° | 0 mm | 5 | |
| Sept. 10 | Overcast | 27° /21° | 0.1 mm | 6 | |
| Sept. 11 |  Cloudy | 26° /20° | 0.6 mm | 5 | |
| Sept. 12 | Partly cloudy | 26° /19° | 3.3 mm | 5 | |
| Sept. 13 |  Mist | 26° /20° | 5.2 mm | 4 | |
| Sept. 14 | Mist | 26° /19° | 0.1 mm | 7 | |
| Sept. 15 | Partly cloudy | 25° /17° | 0 mm | 7 | |
| Sept. 16 | Moderate or heavy rain shower | 24° /16° | 6.5 mm | 6 | |
| Sept. 17 | Overcast | 25° /18° | 3.9 mm | 6 | |
| Sept. 18 |  Moderate rain | 27° /20° | 7.1 mm | 5 | |
| Sept. 19 | Sunny | 27° /19° | 0.4 mm | 6 | |
| Sept. 20 | Overcast | 30° /21° | 13 mm | 7 | |
| Sept. 21 |  Patchy rain possible | 24° /19° | 1.6 mm | 2.6 | |
| Sept. 22 | Light rain shower | 21° /16° | 15.8 mm | 1.9 | |
| Sept. 23 | Light rain shower | 17° /15° | 5.8 mm | 1 | |
| Sept. 24 | Patchy rain possible | 17° /11° | 2.2 mm | 4 | |
| Sept. 25 | Overcast | 20° /10° | 0 mm | 6 | |
| Sept. 26 | Overcast | 23° /10° | 0 mm | 6 | |
| Sept. 27 | Sunny | 20° /12° | 0 mm | 5 | |
| Sept. 28 | Overcast | 22° /16° | 0 mm | 6 | |
| Sept. 29 | Overcast | 24° /16° | 0 mm | 5 | |
| Sept. 30 | Sunny | 23° /13° | 0 mm | 6 | |
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Important Notice
Our weather forecast for Saint Mary's 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 Mary's County forecast closer to your planned date for the most up-to-date weather information.
Change Month
Saint Mary's County in September - FAQ
What are the expected maximum and minimum temperatures in Saint Mary's County during September?
During September, expect a variety of temperatures with highs around 24° and lows near 19°, suitable for diverse activities and preferences.
How much rainfall should be expected in Saint Mary's County during September?
Moderate rainfall is anticipated in Saint Mary's County during September, with a total of 87.3 mm spread over approximately 9 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Saint Mary's County during September?
The average wind speed in Saint Mary's County during September is 20 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Saint Mary's County
Explore the daily rainfall trends and prepare for Saint Mary's Countys September weather 💧
Typically, Saint Mary's County has 9 rainy days in September with a total of 87.3 mm of rainfall.
UV exposure in Saint Mary's County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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Where is Saint Mary's County?Get accurate weather forecasts for Saint Mary's County, located at latitude 38.3 and longitude -76.507. Stay updated with localized weather information tailored for Saint Mary's County.
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