St Petersburg weather in September 2025

Q: How warm is it in St Petersburg in September?

Daytime temperatures usually reach 15°C in St Petersburg in September, falling to 8°C at night.

Q: How sunny is it in St Petersburg in September?

There are normally 4 hours of bright sunshine each day in St Petersburg in September - that's 34% of daylight hours.

Q: How warm is the sea around St Petersburg in September?

The average sea temperature around St Petersburg in September is 13°C.

Q: Does it rain in St Petersburg in September?

There are usually 17 days with some rain in St Petersburg in September and the average monthly rainfall is 70mm.

Expect 15°C daytime maximum temperatures in the shade with on average 4 hours of sunshine per day in St Petersburg in September. Check more long-term weather averages for St Petersburg in September before you book your next holiday to Russia (Europe) in 2025/2026.

15
15°C max day temperature
4
4 hours of sunshine per day
17
17 days with some rainfall
8
8°C min night temperature
13
13 hours of daylight per day
0
No heat & humidity
70
70 mm of monthly rainfall
3
3 (Moderate) UV index
13
13°C sea temperature

More about St Petersburg

St Petersburg by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for Russia (Europe)

Holiday Autos discount code: up to 10% off global car hire

Exclusive

Save up to 10% on cheap car hire worldwide
Exclusive Holiday Autos discount code automatically applied
Travel before 31st December 2024 (inclusive)

Show discount code

******vel

Redeem Holiday Autos discount code >>

Expires at 23:59 on Tuesday 31st Dec 2024 · View all Holiday Autos offers

Car hire finder

Destination

The September weather guide for Russia (Europe) (St Petersburg) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C / mm) | Imperial (°F / inches)

How warm is it in St Petersburg in September?

Daytime temperatures usually reach 15°C in St Petersburg in September, falling to 8°C at night.

How sunny is it in St Petersburg in September?

There are normally 4 hours of bright sunshine each day in St Petersburg in September - that's 34% of daylight hours.

How warm is the sea around St Petersburg in September?

The average sea temperature around St Petersburg in September is 13°C.

Does it rain in St Petersburg in September?

There are usually 17 days with some rain in St Petersburg in September and the average monthly rainfall is 70mm.

St Petersburg September sunrise & sunset times

Browse the sunrise and sunset times for St Petersburg in September 2025. Select a month to view St Petersburg sunrise and sunset times for the next 12 months.

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec