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Weather in Saint Petersburg for September 2025

Your guide to Saint Petersburg weather in September - trends and predictions

    Official Weather Alert ⚠️

  • Пожарная опасность - See hour by hour.

    • Temperatures

  • Until now, September 2025 in Saint Petersburg is slightly cooler than the historical average by -1 °C.

  • The forecast for the next days in Saint Petersburg predicts a temperature of 13.8 °C, which is cooler than the historical average.

  • 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 12 °C by the end of September.

    • Rain 🌧️

  • Saint Petersburg experiences moderate rainfall in September, with an average of 8 rainy days and a total precipitation of 29.2 mm.

Average dry days
22
Dry days
Average rainy days
8
Rainy days
Average snowy days
0
Snow days
Average temperatures
20°/11°
Temperatures
Average wind speed
16 km/h
Avg max wind
Average humidity
70 %
Avg humidity

Saint Petersburg Weather September

Move between months or click on a day
August
October
Mon.Tue.Wed.Thu.Fri.Sat.Sun.
1
Light rain shower
20°
2
Cloudy
22°
3
Moderate or heavy rain shower
22°
4
Partly cloudy
22°
5
Patchy rain possible
22°
6
Cloudy
22°
7
Sunny
21°
8
Sunny
22°
9
Partly cloudy
23°
10
Partly cloudy
24°
11
Partly cloudy
23°
12
Sunny
23°
13
Cloudy
23°
14
Moderate rain
22°
15
Overcast
20°
16
Weather Alert Patchy rain possible
18°
17
Patchy rain possible
15°
18
Patchy rain possible
18°
19
Patchy rain possible
16°
20
Patchy rain possible
17°
21
Patchy rain possible
16°
22
Partly cloudy
13°
23
Patchy rain possible
10°
24
Patchy rain possible
9°
25
Patchy rain possible
13°
26
Patchy rain possible
15°
27
Patchy rain possible
13°
28
Patchy rain possible
12°
29
Patchy rain possible
8°
30
Light rain shower
14°

Temperatures trend during September in Saint Petersburg

See the weather trend as well as the moving average line

September weather in Saint Petersburg day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Light rain shower
Light rain shower
 20° /12° 2.4 mm 5
2 Sept. Cloudy
Cloudy
 22° /11° 0.1 mm 5
3 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 22° /11° 4.1 mm 6
4 Sept. Partly cloudy
Partly cloudy
 22° /12° 0.7 mm 6
5 Sept. Patchy rain possible
Patchy rain possible
 22° /13° 0.2 mm 5
6 Sept. Cloudy
Cloudy
 22° /11° 0.1 mm 5
7 Sept. Sunny
Sunny
 21° /10° 0 mm 6
8 Sept. Sunny
Sunny
 22° /11° 0 mm 6
9 Sept. Partly cloudy
Partly cloudy
 23° /10° 0 mm 6
10 Sept. Partly cloudy
Partly cloudy
 24° /12° 0 mm 6
11 Sept. Partly cloudy
Partly cloudy
 23° /12° 0.1 mm 6
12 Sept. Sunny
Sunny
 23° /13° 0.2 mm 6
13 Sept. Cloudy
Cloudy
 23° /13° 0.6 mm 6
14 Sept. Moderate rain
Moderate rain
 22° /11° 2.5 mm 5
15 Sept. Overcast
Overcast
 20° /10° 0.1 mm 5
16 Sept. Patchy rain possible
Patchy rain possible
 18° /14° 1.7 mm 0.3
17 Sept. Patchy rain possible
Patchy rain possible
 15° /10° 0.2 mm 0.4
18 Sept. Patchy rain possible
Patchy rain possible
 18° /9° 1.4 mm 0.5
19 Sept. Patchy rain possible
Patchy rain possible
 16° /10° 4.5 mm 0.3
20 Sept. Patchy rain possible
Patchy rain possible
 17° /11° 2.3 mm 0.2
21 Sept. Patchy rain possible
Patchy rain possible
 16° /9° 0.5 mm 3
22 Sept. Partly cloudy
Partly cloudy
 13° /9° 0 mm 4
23 Sept. Patchy rain possible
Patchy rain possible
 10° /8° 0.2 mm 2
24 Sept. Patchy rain possible
Patchy rain possible
 9° /7° 1.7 mm 2
25 Sept. Patchy rain possible
Patchy rain possible
 13° /9° 0.4 mm 3
26 Sept. Patchy rain possible
Patchy rain possible
 15° /8° 0.3 mm 3
27 Sept. Patchy rain possible
Patchy rain possible
 13° /6° 0.3 mm 2
28 Sept. Patchy rain possible
Patchy rain possible
 12° /8° 0.9 mm 2
29 Sept. Patchy rain possible
Patchy rain possible
 8° /5° 0.1 mm 2
30 Sept. Light rain shower
Light rain shower
 14° /8° 2.7 mm 4
Next
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.
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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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Location coordinates Where is Saint Petersburg?

Get accurate weather forecasts for Saint Petersburg, located at latitude 59.939 and longitude 30.314. Stay updated with localized weather information tailored for Saint Petersburg.

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