Climate averages 1991–2020
Tomakomai weather
in October.
A cool, wet month: the 5th warmest and the 9th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
October is a cool month in Tomakomai: daytime highs average 14.3°C and nights cool to about 8.8°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 110 mm of rain on roughly 12 days, which makes October a wet month (the 9th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 06 min on an average October day.
The nearest other city in this atlas is Chitose (21 km away). In October its highs average 14.5°C, about as warm as Tomakomai, with 91 mm of rain.
Among the 303 cities listed in Japan, Tomakomai ranks joint 297th of 303 for the warmest October highs and joint 39th of 303 for the driest October (rainfall, lowest first). The mean October high of those 303 cities is 20.4°C; Tomakomai is 6.0°C cooler than that mean.
From October to November, average highs fall by 7.1°C to 7.3°C, and monthly rainfall falls from 110 mm to 78 mm.
The annual picture
October 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 | 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, selected | 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
October in nearby cities
- Chitose in OctoberJapan · 21 kmHigh 14.5°C · Low 7.6°C · 91 mm rain
- Eniwa in OctoberJapan · 29 kmHigh 14.3°C · Low 6.8°C · 87 mm rain
- Sapporo in OctoberJapan · 52 kmHigh 14.7°C · Low 8.0°C · 99 mm rain
- Ebetsu in OctoberJapan · 53 kmHigh 14.3°C · Low 6.7°C · 87 mm rain
- Muroran in OctoberJapan · 62 kmHigh 14.1°C · Low 8.9°C · 103 mm rain
- Iwamizawa in OctoberJapan · 64 kmHigh 14.4°C · Low 6.3°C · 92 mm rain
- Otaru in OctoberJapan · 79 kmHigh 14.4°C · Low 9.0°C · 117 mm rain
- Hakodate in OctoberJapan · 119 kmHigh 15.3°C · Low 10.4°C · 114 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.