Temperature
Cool by day, brisk at night.
59°Ftypical September high
Typical range
Cool days.
Cool by day, brisk at night.
Several rainy days. About 11 wet days this month.
Sunshine is limited, with cloud often dominating.
In September, afternoons feel about 52° and nights feel near 44°.
Mostly cloudy skies this month.
Calm winds are typical in September.
September late afternoons are around 58°F, easing to about 55°F in early evening.
| Month | High°F | Low°F | Rainin | Wet days | Sunh | Humidity% |
|---|---|---|---|---|---|---|
| Jan | 26 | 18 | 1.7 | 12 | 0.7 | 88 |
| Feb | 26 | 17 | 1.3 | 10 | 1.9 | 86 |
| Mar | 34 | 22 | 1.4 | 9 | 4.0 | 80 |
| Apr | 46 | 32 | 1.5 | 9 | 6.0 | 73 |
| May | 57 | 42 | 2.0 | 10 | 8.4 | 70 |
| Jun | 65 | 50 | 2.6 | 11 | 9.2 | 73 |
| Jul | 71 | 57 | 2.7 | 12 | 8.6 | 76 |
| Aug | 68 | 55 | 3.2 | 12 | 6.9 | 79 |
| Sep | 59 | 47 | 2.1 | 11 | 4.3 | 83 |
| Oct | 46 | 38 | 2.6 | 13 | 2.3 | 86 |
| Nov | 37 | 31 | 2.3 | 13 | 0.9 | 88 |
| Dec | 30 | 24 | 2.0 | 13 | 0.4 | 88 |
Similar climates
Want a side-by-side climate view? Compare St. Petersburg with Warsaw.
Typical monthly values are based on long-term climate records. Useful for planning, not a forecast. Check the weather before you travel.
Sunshine: source type is not yet identified at metric level.
Local microclimates can vary by beach, neighborhood, trail, or elevation.
Last updated: Jun 1, 2026
Data & methodology