Climate averages 1991–2020
Kouvola weather
in December.
A freezing month with moderate precipitation: the 10th warmest and the 8th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a freezing month in Kouvola: daytime highs average -1.6°C and nights cool to about -5.5°C. By daytime temperature it is the 10th warmest of the 12 months.
Expect about 54 mm of precipitation on roughly 12 days, which makes December a month with moderate precipitation (the 8th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 5 h 46 min on an average December day.
The nearest other city in this atlas is Lahti (58 km away). In December its highs average -1.5°C, about as warm as Kouvola, with 48 mm of precipitation.
Among the 13 cities listed in Finland, Kouvola ranks 8th of 13 for the warmest December highs and 9th of 13 for the driest December (precipitation, lowest first). The mean December high of those 13 cities is -1.3°C; Kouvola is 0.3°C cooler than that mean.
From December to January, average highs fall by 2.2°C to -3.8°C, and monthly precipitation falls from 54 mm to 44 mm.
The annual picture
December 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
Kouvola climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | -3.8°C-8.3°C | -8.3°C | 44 | 10.6 | 6.67 h |
| February | -3.9°C-8.8°C | -8.8°C | 40 | 9.0 | 9.09 h |
| March | 0.5°C-5.8°C | -5.8°C | 36 | 8.6 | 11.712 h |
| April | 7.3°C-0.9°C | -0.9°C | 35 | 8.9 | 14.615 h |
| May | 14.7°C5.8°C | 5.8°C | 46 | 9.8 | 17.317 h |
| June | 18.9°C11.0°C | 11.0°C | 70 | 11.8 | 19.019 h |
| July | 21.5°C14.1°C | 14.1°C | 66 | 11.5 | 18.318 h |
| August | 19.8°C12.9°C | 12.9°C | 66 | 10.9 | 15.816 h |
| September | 14.2°C8.4°C | 8.4°C | 53 | 9.9 | 13.013 h |
| October | 7.0°C2.9°C | 2.9°C | 57 | 10.9 | 10.110 h |
| November | 1.7°C-1.5°C | -1.5°C | 53 | 11.3 | 7.47 h |
| December, selected | -1.6°C-5.5°C | -5.5°C | 54 | 11.7 | 5.86 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
December in nearby cities
- Lahti in DecemberFinland · 58 kmHigh -1.5°C · Low -5.2°C · 48 mm precipitation
- Lappeenranta in DecemberFinland · 83 kmHigh -2.0°C · Low -5.5°C · 52 mm precipitation
- Vantaa in DecemberFinland · 111 kmHigh -0.2°C · Low -4.1°C · 55 mm precipitation
- Vyborg in DecemberRussia · 113 kmHigh -1.4°C · Low -5.0°C · 59 mm precipitation
- Helsinki in DecemberFinland · 124 kmHigh 0.1°C · Low -3.2°C · 55 mm precipitation
- Espoo in DecemberFinland · 134 kmHigh 0.3°C · Low -3.0°C · 57 mm precipitation
- Jyväskylä in DecemberFinland · 161 kmHigh -2.2°C · Low -6.0°C · 46 mm precipitation
- Tampere in DecemberFinland · 171 kmHigh -1.5°C · Low -4.7°C · 46 mm precipitation
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 Kouvola) is explained once on the Kouvola year overview and on the Sources, method and limits page.