Saint Peters
September
Weather in Saint Peters for September 2025
Your guide to Saint Peters weather in September - trends and predictions
In general, the average temperature in Saint Peters at the beginning of September is 19.4 °C. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 16.9 °C by the end of September.
Saint Peters sees moderate rainfall in September, averaging 10 rainy days.
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20
Dry days
10
Rainy days
0
Snow days
19°/16°
Temperatures
27 km/h
Avg max wind
77 %
Avg humidity
Saint Peters in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  19° | 2 20° | 3  20° | 4  18° | 5 19° | 6 20° | 7 20° |
| 8 20° | 9 20° | 10  21° | 11 18° | 12 17° | 13 17° | 14 17° |
| 15 19° | 16 18° | 17 18° | 18 19° | 19  19° | 20 19° | 21 18° |
| 22 18° | 23 17° | 24 18° | 25 18° | 26 18° | 27  16° | 28 15° |
| 29 16° | 30 17° |
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Temperatures trend during September in Saint Peters
See the weather trend as well as the moving average line
September weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. | Light rain shower | 19° /17° | 7.9 mm | 5 | |
| 2 Sept. | Patchy rain possible | 20° /17° | 0.3 mm | 5 | |
| 3 Sept. | Overcast | 20° /17° | 1 mm | 5 | |
| 4 Sept. | Sunny | 18° /17° | 1.6 mm | 5 | |
| 5 Sept. | Overcast | 19° /17° | 3.5 mm | 5 | |
| 6 Sept. | Sunny | 20° /17° | 2.1 mm | 5 | |
| 7 Sept. | Sunny | 20° /18° | 7.5 mm | 5 | |
| 8 Sept. | Overcast | 20° /16° | 2.8 mm | 5 | |
| 9 Sept. | Sunny | 20° /17° | 0.4 mm | 5 | |
| 10 Sept. | Partly cloudy | 21° /16° | 2.2 mm | 5 | |
| 11 Sept. | Partly cloudy | 18° /14° | 0.6 mm | 5 | |
| 12 Sept. | Overcast | 17° /13° | 1.4 mm | 4 | |
| 13 Sept. | Overcast | 17° /14° | 0.1 mm | 4 | |
| 14 Sept. | Sunny | 17° /13° | 0 mm | 5 | |
| 15 Sept. | Sunny | 19° /15° | 0 mm | 6 | |
| 16 Sept. | Sunny | 18° /16° | 0.1 mm | 5 | |
| 17 Sept. | Patchy rain possible | 18° /17° | 0.8 mm | 4 | |
| 18 Sept. | Light rain shower | 19° /15° | 3.3 mm | 5 | |
| 19 Sept. | Light rain | 19° /16° | 1.5 mm | 5 | |
| 20 Sept. | Light rain | 19° /16° | 5.2 mm | 4 | |
| 21 Sept. | Patchy rain possible | 18° /15° | 6.5 mm | 4 | |
| 22 Sept. | Light rain shower | 18° /14° | 13.8 mm | 4 | |
| 23 Sept. | Partly cloudy | 17° /13° | 3.7 mm | 5 | |
| 24 Sept. | Partly cloudy | 18° /14° | 0.4 mm | 5 | |
| 25 Sept. | Patchy rain possible | 18° /14° | 7.9 mm | 4 | |
| 26 Sept. | Light rain shower | 18° /15° | 5.1 mm | 4 | |
| 27 Sept. | Cloudy | 16° /13° | 4.7 mm | 4 | |
| 28 Sept. | Partly cloudy | 15° /11° | 0 mm | 5 | |
| 29 Sept. | Light rain shower | 16° /13° | 0.8 mm | 4 | |
| 30 Sept. | Partly cloudy | 17° /13° | 8.2 mm | 5 | |
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Important Notice
Our weather forecast for Saint Peters 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 Peters forecast closer to your planned date for the most up-to-date weather information.
Saint Peters in September - FAQ
What are the expected maximum and minimum temperatures in Saint Peters during September?
During September, expect a variety of temperatures with highs around 19° and lows near 16°, suitable for diverse activities and preferences.
How much rainfall should be expected in Saint Peters during September?
In September, Saint Peters can expect light to moderate rainfall, totaling 48 mm across approximately 10 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in Saint Peters during September?
The average wind speed in Saint Peters during September is 27 km/h, suggesting breezy to windy conditions, depending on your activities.
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