Climate averages 1991–2020
Tomakomai weather
in January.
A freezing month with moderate precipitation: the coolest and one of the driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
January is a freezing month in Tomakomai: daytime highs average -2.0°C and nights cool to about -7.5°C. By daytime temperature it is the coolest month of the year.
Expect about 44 mm of precipitation on roughly 7 days, which makes January a month with moderate precipitation (one of the driest months of the year). Daylight, from sunrise to sunset, lasts about 9 h 26 min on an average January day.
The nearest other city in this atlas is Chitose (21 km away). In January its highs average -2.3°C, about as warm as Tomakomai, with 36 mm of precipitation.
Among the 303 cities listed in Japan, Tomakomai ranks joint 293rd of 303 for the warmest January highs and 8th of 303 for the driest January (precipitation, lowest first). The mean January high of those 303 cities is 7.0°C; Tomakomai is 8.9°C cooler than that mean.
From January to February, average highs rise by 0.7°C to -1.3°C, and monthly precipitation stays at 44 mm.
The annual picture
January 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
Tomakomai climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January, selected | -2.0°C-7.5°C | -7.5°C | 44 | 7.1 | 9.49 h |
| February | -1.3°C-7.4°C | -7.4°C | 44 | 7.4 | 10.511 h |
| March | 2.2°C-4.0°C | -4.0°C | 63 | 10.3 | 11.912 h |
| April | 7.5°C1.0°C | 1.0°C | 78 | 11.5 | 13.413 h |
| May | 12.7°C6.7°C | 6.7°C | 109 | 11.8 | 14.615 h |
| June | 16.7°C11.6°C | 11.6°C | 100 | 11.3 | 15.315 h |
| July | 20.6°C16.1°C | 16.1°C | 138 | 13.7 | 15.015 h |
| August | 22.5°C18.2°C | 18.2°C | 197 | 14.5 | 13.914 h |
| September | 20.1°C15.1°C | 15.1°C | 177 | 15.0 | 12.513 h |
| October | 14.3°C8.8°C | 8.8°C | 110 | 11.8 | 11.111 h |
| November | 7.3°C2.0°C | 2.0°C | 78 | 10.8 | 9.810 h |
| December | 0.7°C-4.2°C | -4.2°C | 63 | 8.7 | 9.19 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
January in nearby cities
- Chitose in JanuaryJapan · 21 kmHigh -2.3°C · Low -9.6°C · 36 mm precipitation
- Eniwa in JanuaryJapan · 29 kmHigh -3.0°C · Low -10.2°C · 41 mm precipitation
- Sapporo in JanuaryJapan · 52 kmHigh -3.0°C · Low -9.0°C · 52 mm precipitation
- Ebetsu in JanuaryJapan · 53 kmHigh -3.7°C · Low -10.6°C · 41 mm precipitation
- Muroran in JanuaryJapan · 62 kmHigh -2.0°C · Low -6.8°C · 51 mm precipitation
- Iwamizawa in JanuaryJapan · 64 kmHigh -3.5°C · Low -10.8°C · 49 mm precipitation
- Otaru in JanuaryJapan · 79 kmHigh -2.3°C · Low -5.8°C · 98 mm precipitation
- Hakodate in JanuaryJapan · 119 kmHigh -0.5°C · Low -5.0°C · 52 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 Tomakomai) is explained once on the Tomakomai year overview and on the Sources, method and limits page.