Climate averages 1991–2020
Petrozavodsk weather
in September.
A cool, moderately wet month: the 4th warmest and the 9th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a cool month in Petrozavodsk: daytime highs average 13.0°C and nights cool to about 8.6°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 58 mm of rain on roughly 12 days, which makes September a moderately wet month (the 9th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 01 min on an average September day.
The nearest other city in this atlas is Joensuu (254 km away). In September its highs average 12.4°C, 0.7°C cooler than Petrozavodsk, with 68 mm of rain.
Among the 236 cities listed in Russia, Petrozavodsk ranks joint 212th of 236 for the warmest September highs and joint 144th of 236 for the driest September (rainfall, lowest first). The mean September high of those 236 cities is 16.4°C; Petrozavodsk is 3.3°C cooler than that mean.
From September to October, average highs fall by 7.2°C to 5.8°C, and monthly rainfall falls from 58 mm to 55 mm.
The annual picture
September in context
Monthly precipitation
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Petrozavodsk climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | -6.1°C-10.4°C | -10.4°C | 32 | 8.8 | 6.36 h |
| February | -6.0°C-10.4°C | -10.4°C | 28 | 8.2 | 8.89 h |
| March | -1.2°C-6.5°C | -6.5°C | 33 | 8.8 | 11.712 h |
| April | 5.2°C-1.5°C | -1.5°C | 37 | 9.0 | 14.715 h |
| May | 12.1°C4.6°C | 4.6°C | 55 | 10.9 | 17.618 h |
| June | 17.4°C10.8°C | 10.8°C | 68 | 12.1 | 19.419 h |
| July | 20.5°C14.5°C | 14.5°C | 86 | 14.0 | 18.619 h |
| August | 18.4°C13.1°C | 13.1°C | 88 | 13.4 | 16.016 h |
| September, selected | 13.0°C8.6°C | 8.6°C | 58 | 11.6 | 13.013 h |
| October | 5.8°C2.6°C | 2.6°C | 55 | 11.5 | 10.110 h |
| November | -0.1°C-3.1°C | -3.1°C | 49 | 10.9 | 7.27 h |
| December | -3.4°C-7.2°C | -7.2°C | 41 | 11.4 | 5.45 h |
Precipitation (rain or snow, as water) is the average of the 30 separate monthly totals. A wet day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
September in nearby cities
- Joensuu in SeptemberFinland · 254 kmHigh 12.4°C · Low 8.8°C · 68 mm rain
- Saint Petersburg in SeptemberRussia · 300 kmHigh 14.4°C · Low 9.1°C · 55 mm rain
- Kolpino in SeptemberRussia · 305 kmHigh 14.8°C · Low 8.7°C · 54 mm rain
- Pushkin in SeptemberRussia · 315 kmHigh 14.6°C · Low 8.2°C · 54 mm rain
- Peterhof in SeptemberRussia · 320 kmHigh 13.9°C · Low 9.4°C · 63 mm rain
- Vyborg in SeptemberRussia · 322 kmHigh 14.2°C · Low 9.3°C · 59 mm rain
- Gatchina in SeptemberRussia · 336 kmHigh 14.5°C · Low 8.2°C · 52 mm rain
- Lappeenranta in SeptemberFinland · 337 kmHigh 13.9°C · Low 8.6°C · 56 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Petrozavodsk) is explained once on the Petrozavodsk year overview and on the Sources, method and limits page.