Climate averages 1991–2020
Tomakomai weather
in July.
A mild, wet month: the 2nd warmest and the 10th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
July is a mild month in Tomakomai: daytime highs average 20.6°C and nights cool to about 16.1°C. By daytime temperature it is the 2nd warmest of the 12 months.
Expect about 138 mm of rain on roughly 14 days, which makes July a wet month (the 10th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 59 min on an average July day.
The nearest other city in this atlas is Chitose (21 km away). In July its highs average 21.7°C, 1.1°C warmer than Tomakomai, with 116 mm of rain.
Among the 303 cities listed in Japan, Tomakomai ranks 302nd of 303 for the warmest July highs and joint 14th of 303 for the driest July (rainfall, lowest first). The mean July high of those 303 cities is 27.9°C; Tomakomai is 7.3°C cooler than that mean.
From July to August, average highs rise by 1.9°C to 22.5°C, and monthly rainfall rises from 138 mm to 197 mm.
The annual picture
July 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 | -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, selected | 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
July in nearby cities
- Chitose in JulyJapan · 21 kmHigh 21.7°C · Low 15.9°C · 116 mm rain
- Eniwa in JulyJapan · 29 kmHigh 22.5°C · Low 15.8°C · 119 mm rain
- Sapporo in JulyJapan · 52 kmHigh 23.8°C · Low 16.9°C · 138 mm rain
- Ebetsu in JulyJapan · 53 kmHigh 23.4°C · Low 16.2°C · 119 mm rain
- Muroran in JulyJapan · 62 kmHigh 21.3°C · Low 16.7°C · 153 mm rain
- Iwamizawa in JulyJapan · 64 kmHigh 23.7°C · Low 16.3°C · 113 mm rain
- Otaru in JulyJapan · 79 kmHigh 23.5°C · Low 17.0°C · 127 mm rain
- Hakodate in JulyJapan · 119 kmHigh 21.6°C · Low 17.3°C · 178 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 Tomakomai) is explained once on the Tomakomai year overview and on the Sources, method and limits page.