Saint Petersburg
September
Weather in Saint Petersburg for September 2025
Your guide to Saint Petersburg weather in September - trends and predictions
In general, the average temperature in Saint Petersburg at the beginning of September is 21.6 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 17.4 °C by the end of September.
Saint Petersburg experiences moderate rainfall in September, with an average of 8 rainy days and a total precipitation of 29.2 mm.
Temperatures
Rain 🌧️
22
Dry days
8
Rainy days
0
Snow days
20°/11°
Temperatures
16 km/h
Avg max wind
70 %
Avg humidity
Saint Petersburg Weather September
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  21° | 2  22° | 3  22° | 4  23° | 5 23° | 6 20° | 7 20° |
| 8  22° | 9 22° | 10 24° | 11 23° | 12  24° | 13 24° | 14  23° |
| 15  20° | 16 22° | 17 22° | 18 17° | 19 21° | 20  17° | 21 18° |
| 22 17° | 23 19° | 24 19° | 25 19° | 26 19° | 27 17° | 28 18° |
| 29 16° | 30 14° |
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Temperatures trend during September in Saint Petersburg
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 | 21° /13° | 3.7 mm | 5 | |
| 2 Sept. | Cloudy | 22° /12° | 0.1 mm | 5 | |
| 3 Sept. | Moderate or heavy rain shower | 22° /13° | 6.2 mm | 6 | |
| 4 Sept. | Partly cloudy | 23° /12° | 0 mm | 7 | |
| 5 Sept. | Patchy rain possible | 23° /12° | 0.3 mm | 6 | |
| 6 Sept. | Cloudy | 20° /10° | 0.2 mm | 5 | |
| 7 Sept. | Partly cloudy | 20° /9° | 0 mm | 6 | |
| 8 Sept. | Mist | 22° /11° | 0 mm | 6 | |
| 9 Sept. | Partly cloudy | 22° /10° | 0 mm | 6 | |
| 10 Sept. | Partly cloudy | 24° /11° | 0 mm | 7 | |
| 11 Sept. | Partly cloudy | 23° /13° | 0.1 mm | 6 | |
| 12 Sept. | Sunny | 24° /14° | 0.3 mm | 6 | |
| 13 Sept. | Cloudy | 24° /14° | 0.9 mm | 6 | |
| 14 Sept. | Moderate rain | 23° /11° | 3.6 mm | 6 | |
| 15 Sept. | Overcast | 20° /10° | 0 mm | 6 | |
| 16 Sept. | Partly cloudy | 22° /10° | 0 mm | 6 | |
| 17 Sept. | Light rain shower | 22° /11° | 0.8 mm | 5 | |
| 18 Sept. | Mist | 17° /8° | 0 mm | 4 | |
| 19 Sept. | Patchy rain possible | 21° /8° | 1.2 mm | 5 | |
| 20 Sept. | Light rain | 17° /12° | 1.6 mm | 4 | |
| 21 Sept. | Patchy rain possible | 18° /10° | 0.1 mm | 5 | |
| 22 Sept. | Cloudy | 17° /7° | 0 mm | 4 | |
| 23 Sept. | Patchy rain possible | 19° /9° | 0.8 mm | 4 | |
| 24 Sept. | Light rain shower | 19° /10° | 0.4 mm | 5 | |
| 25 Sept. | Overcast | 19° /11° | 0.1 mm | 5 | |
| 26 Sept. | Overcast | 19° /11° | 1.4 mm | 5 | |
| 27 Sept. | Patchy rain possible | 17° /11° | 3.3 mm | 4 | |
| 28 Sept. | Mist | 18° /12° | 0.8 mm | 4 | |
| 29 Sept. | Sunny | 16° /8° | 0.9 mm | 5 | |
| 30 Sept. | Light rain shower | 14° /8° | 2.7 mm | 4 | |
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Important Notice
Our weather forecast for Saint Petersburg 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 Petersburg forecast closer to your planned date for the most up-to-date weather information.
Saint Petersburg in September - FAQ
What are the expected maximum and minimum temperatures in Saint Petersburg during September?
Enjoy moderate daytime temperatures of up to 20° and cooler nights around 11°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Saint Petersburg during September?
In September, Saint Petersburg can expect light to moderate rainfall, totaling 29.2 mm across approximately 8 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in Saint Petersburg during September?
The average wind speed in Saint Petersburg during September is 16 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Saint Petersburg
Explore the daily rainfall trends and prepare for Saint Petersburgs September weather 💧
UV exposure in Saint Petersburg during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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