worldweather15°Ccooler than usual
usually 14°C–20°C
cooler than 74% of similar days
night: exceptionally warm
rain: less rain than usual
wind: stronger than usual
Weather in Saint Petersburg - 14-day forecast
Detailed weather forecast for Saint Petersburg, Russia: daytime and night temperature, rain, sunrise and sunset - today and for the next two weeks.
Forecast for the next days in Saint Petersburg
today🌧️
15°💧 0.1 mm
Sun☁️
13°💧 0.6 mm
Mon☁️
10°💧 0.6 mm
Tue☁️
14°💧 2.4 mm
Wed🌧️
13°💧 1.5 mm
Thu🌧️
16°💧 5.8 mm
Fri🌧️
15°💧 1.2 mm
Sat🌧️
17°💧 0.8 mm
Forecast vs 1991-2020 climate normal
NASA POWERHow does the current forecast compare with normal?
We compare the coming days with weather usually observed at this time of year.
Monday 7 Sept in Saint Petersburg, the forecast high is 10°C. Typical daytime temperatures at this time of year range from 14°C to 19°C, so it will be exceptionally cool. It is cooler than 96% of similar days.
13°Ccooler than usual
usually 14°C–20°C
cooler than 84% of similar days
night: cooler than usual
rain: typical rainfall
wind: exceptionally strong
10°Cexceptionally cool
usually 14°C–19°C
cooler than 96% of similar days
night: cooler than usual
rain: typical rainfall
wind: exceptionally strong
14°Ccooler than usual
usually 13°C–19°C
cooler than 71% of similar days
night: warmer than usual
rain: more rain than usual
wind: stronger than usual
13°Ccooler than usual
usually 13°C–19°C
cooler than 78% of similar days
night: exceptionally warm
rain: typical rainfall
wind: typical
16°Cnear normal
usually 13°C–18°C
night: exceptionally warm
rain: more rain than usual
wind: stronger than usual
15°Cnear normal
usually 13°C–18°C
night: warmer than usual
rain: typical rainfall
wind: exceptionally strong
How warm was this week in previous years?
Each bar shows the average daily high during the same 7-day period in each year.
cooler yearstypical rangewarmer years2026 forecastcurrent forecast
From 1981 to 2025, the 5-11 Sept period averaged 16°C by day. The coolest year was 1991 (11°C) and the warmest was 2024 (22°C). The current forecast averages 14°C - lower than in 78% of historical years.
Historical reference: NASA POWER daily gridded data (MERRA-2), the 1991-2020 normal and a +/- 7-day calendar window. The typical range is the 20th-80th percentile. This is not a city weather-station reading and does not change the current forecast. NASA POWER Daily API.
14-day forecast - Saint Petersburg
Saint Petersburg 30 & 45-day weather - long-range outlook
Next 16 days · forecast
14°
around 12° at night · days with rain: 9
Weeks 3-4 · avg for September
16°
around 9° at night · rain chance 52%
Weeks 5-7 · avg for October
8°
around 2° at night · rain chance 58%
The 30 & 45-day outlook for Saint Petersburg: the next 16 days are a numerical forecast updated daily - on average 14° by day and 12° at night. Further out we rely on multi-year climate averages: around 16° in September, and about 8° in October. Forecasts beyond two weeks are indicative only.
Day-by-day forecast for Saint Petersburg
Saturday5 September 2026
🌧️15°light rain
Sunday6 September 2026
☁️13°overcast clouds
Monday7 September 2026
☁️10°overcast clouds
Tuesday8 September 2026
☁️14°broken clouds
Wednesday9 September 2026
🌧️13°light rain
Thursday10 September 2026
🌧️16°light rain
Friday11 September 2026
🌧️15°light rain
Saturday12 September 2026
🌧️17°light rain
Sunday13 September 2026
🌧️13°light rain
Monday14 September 2026
🌧️12°light rain
Tuesday15 September 2026
🌧️12°light rain
Wednesday16 September 2026
🌧️14°light rain
Thursday17 September 2026
🌧️17°light rain
Friday18 September 2026
🌧️13°light rain
Saturday19 September 2026
🌧️11°light rain
Sunday20 September 2026
☀️15°clear sky
UV index in Saint Petersburg - is it safe to sunbathe?
Today the UV index in Saint Petersburg is 3 (moderate) - unprotected fair skin can burn in about 60 minutes. Seek shade around midday. SPF 30+, sunglasses and a hat for longer stays.
Pollen in Saint Petersburg - info for allergy sufferers
Today ragweed pollen is highest in Saint Petersburg - about 76 grains/m³, very high level. Allergy sufferers should limit time outdoors on dry, windy days and take medication as advised. Pollen levels are a CAMS model forecast and are indicative.
Sea temperature - Saint Petersburg
Water today
18°C
Week avg
17°C
Waves today
0 m
How's the water?
cold
16-day sea temperature forecast:
Average sea temperature through the year:
Sea-surface temperature from marine models, updated daily. See also: where the sea is warmest right now.
Saint Petersburg weather through the year
Warmest, driest months on average: April, May, June, July.
Upcoming public holidays in Russia: Unity Day — 4 November · New Year's Day — 1 January · New Year holiday — 2 January.
Nearby and related places
FAQ - Saint Petersburg weather
What is the weather like in Saint Petersburg today?
Today it is about 15° during the day and 14° at night, light rain.
How far ahead can I check the forecast for Saint Petersburg?
This page shows a detailed 14-day forecast plus the long-term monthly climate, so you can plan both a short trip and a holiday months ahead.