Climate averages 1991–2020
Kostroma weather
in September.
A cool, moderately wet month: the 5th warmest and the joint 8th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a cool month in Kostroma: daytime highs average 14.4°C and nights cool to about 8.1°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 65 mm of rain on roughly 11 days, which makes September a moderately wet month (the joint 8th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 53 min on an average September day.
The nearest other city in this atlas is Yaroslavl (64 km away). In September its highs average 14.6°C, about as warm as Kostroma, with 60 mm of rain.
Among the 236 cities listed in Russia, Kostroma ranks joint 181st of 236 for the warmest September highs and joint 208th of 236 for the driest September (rainfall, lowest first). The mean September high of those 236 cities is 16.4°C; Kostroma is 2.0°C cooler than that mean.
From September to October, average highs fall by 7.6°C to 6.8°C, and monthly rainfall stays at 65 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
Kostroma climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | -6.5°C-11.3°C | -11.3°C | 41 | 11.2 | 7.37 h |
| February | -5.9°C-11.3°C | -11.3°C | 31 | 8.6 | 9.39 h |
| March | -0.4°C-6.9°C | -6.9°C | 35 | 9.2 | 11.812 h |
| April | 8.3°C-0.6°C | -0.6°C | 40 | 9.2 | 14.314 h |
| May | 16.1°C6.9°C | 6.9°C | 58 | 11.1 | 16.617 h |
| June | 20.1°C11.9°C | 11.9°C | 75 | 11.8 | 18.018 h |
| July | 22.5°C14.8°C | 14.8°C | 73 | 12.5 | 17.417 h |
| August | 20.2°C12.9°C | 12.9°C | 70 | 12.0 | 15.315 h |
| September, selected | 14.4°C8.1°C | 8.1°C | 65 | 11.0 | 12.913 h |
| October | 6.8°C2.2°C | 2.2°C | 65 | 12.1 | 10.410 h |
| November | -0.5°C-4.1°C | -4.1°C | 50 | 10.8 | 8.08 h |
| December | -4.4°C-8.7°C | -8.7°C | 42 | 10.4 | 6.77 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
- Yaroslavl in SeptemberRussia · 64 kmHigh 14.6°C · Low 8.1°C · 60 mm rain
- Kineshma in SeptemberRussia · 80 kmHigh 14.5°C · Low 8.5°C · 59 mm rain
- Ivanovo in SeptemberRussia · 85 kmHigh 14.8°C · Low 8.1°C · 59 mm rain
- Rybinsk in SeptemberRussia · 127 kmHigh 14.3°C · Low 8.7°C · 60 mm rain
- Kovrov in SeptemberRussia · 158 kmHigh 15.2°C · Low 8.5°C · 56 mm rain
- Vologda in SeptemberRussia · 173 kmHigh 13.6°C · Low 7.5°C · 60 mm rain
- Vladimir in SeptemberRussia · 184 kmHigh 15.4°C · Low 8.5°C · 56 mm rain
- Dzerzhinsk in SeptemberRussia · 228 kmHigh 15.4°C · Low 8.7°C · 55 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 Kostroma) is explained once on the Kostroma year overview and on the Sources, method and limits page.