What September feels like in Saint Petersburg
Early autumn arrives in Saint Petersburg with September. Expect cool, jacket-on afternoons — comfortable for a long walk. Little changes after sunset — nights are cool, only slightly below the daytime level. Moisture in the air gives the cold a damp edge.
Rain in Saint Petersburg in September
Expect a mix of dry and wet days, with rain about one day in 3. Wet days average about 5.1 mm (0.2 in), enough to soak you without an umbrella. Across the year Saint Petersburg averages about 4.9 mm per rainy day, so September is typical.
Daylight and sunshine in September
On 15 September the sun rises at about 6:24 am and sets around 7:24 pm local time, giving 13 h of daylight. Compared with mid-August, the day has lost 2 h 45 min. About 62% of daylight hours are sunny; in short, there are plenty of bright spells.
How September compares to the rest of the year
In Saint Petersburg's temperature order, September sits as the 4th warmest month. Against August, the average high is 5.3°C (9.5°F) lower, with 37 mm less rain. October is cooler again. By October, typical highs are 8.2°C (46.8°F).
Who September suits
- Sightseeing: a good fit — comfortable enough to explore on foot all day.
- Parks & outdoor: a good fit — good conditions for sitting outside.
- Beach: less ideal — the sea air is too cool.
Tips for visiting Saint Petersburg in September
Rain Protection
A packable rain jacket saves the day on showery afternoons.
Light Jacket
A light jacket or knit layer is enough for most of the day.
Sunglasses
Bright days make sunglasses worth packing.
Quick questions
How warm is Saint Petersburg in September?
It feels cool: typical highs are 15.4°C (59.7°F), with lows near 9.6°C (49.3°F).
Does it rain a lot in Saint Petersburg in September?
Quite a lot — 56 mm spread over about 11 days.
What should I wear in Saint Petersburg in September?
Based on the averages: rain protection, a light jacket and sunglasses. Evenings feel similar to the day, so the same clothes work from morning to night.
Is September or October better for visiting Saint Petersburg?
September scores better on our climate ranking (#5 of 12 vs #7), rated Good against Fair. October is cooler and has more rainy days.