Climate averages 1991–2020
Jyväskylä weather
in September.
A cool, moderately wet month: the 5th warmest and the 8th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a cool month in Jyväskylä: daytime highs average 13.2°C and nights cool to about 8.1°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 54 mm of rain on roughly 11 days, which makes September a moderately wet month (the 8th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 02 min on an average September day.
The nearest other city in this atlas is Kuopio (124 km away). In September its highs average 12.6°C, 0.6°C cooler than Jyväskylä, with 65 mm of rain.
Among the 13 cities listed in Finland, Jyväskylä ranks 10th of 13 for the warmest September highs and 4th of 13 for the driest September (rainfall, lowest first). The mean September high of those 13 cities is 13.8°C; Jyväskylä is 0.6°C cooler than that mean.
From September to October, average highs fall by 7.2°C to 6.0°C, and monthly rainfall rises from 54 mm to 56 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
Jyväskylä climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | -4.4°C-8.7°C | -8.7°C | 38 | 10.0 | 6.26 h |
| February | -4.6°C-9.2°C | -9.2°C | 30 | 7.7 | 8.89 h |
| March | -0.3°C-6.0°C | -6.0°C | 32 | 8.6 | 11.712 h |
| April | 6.0°C-1.4°C | -1.4°C | 35 | 8.9 | 14.815 h |
| May | 13.5°C5.1°C | 5.1°C | 48 | 10.2 | 17.718 h |
| June | 18.0°C10.7°C | 10.7°C | 74 | 12.9 | 19.720 h |
| July | 20.6°C13.8°C | 13.8°C | 87 | 13.0 | 18.819 h |
| August | 18.8°C12.7°C | 12.7°C | 72 | 12.3 | 16.016 h |
| September, selected | 13.2°C8.1°C | 8.1°C | 54 | 10.5 | 13.013 h |
| October | 6.0°C2.5°C | 2.5°C | 56 | 10.6 | 10.010 h |
| November | 0.9°C-2.0°C | -2.0°C | 49 | 10.9 | 7.17 h |
| December | -2.2°C-6.0°C | -6.0°C | 46 | 11.4 | 5.35 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
- Kuopio in SeptemberFinland · 124 kmHigh 12.6°C · Low 8.3°C · 65 mm rain
- Tampere in SeptemberFinland · 131 kmHigh 13.5°C · Low 8.8°C · 53 mm rain
- Lahti in SeptemberFinland · 140 kmHigh 14.1°C · Low 8.5°C · 51 mm rain
- Kouvola in SeptemberFinland · 161 kmHigh 14.2°C · Low 8.4°C · 53 mm rain
- Lappeenranta in SeptemberFinland · 185 kmHigh 13.9°C · Low 8.6°C · 56 mm rain
- Joensuu in SeptemberFinland · 212 kmHigh 12.4°C · Low 8.8°C · 68 mm rain
- Vantaa in SeptemberFinland · 220 kmHigh 14.9°C · Low 9.0°C · 57 mm rain
- Pori in SeptemberFinland · 223 kmHigh 14.1°C · Low 9.4°C · 62 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 Jyväskylä) is explained once on the Jyväskylä year overview and on the Sources, method and limits page.