Climate averages 1991–2020
Seto weather
in January.
A cold, moderately wet month: the coolest and the driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
January is a cold month in Seto: daytime highs average 7.8°C and nights cool to about -1.1°C. By daytime temperature it is the coolest month of the year.
Expect about 54 mm of rain on roughly 6 days, which makes January a moderately wet month (the driest month of the year). Daylight, from sunrise to sunset, lasts about 10 h 04 min on an average January day.
The nearest other city in this atlas is Tajimi (10 km away). In January its highs average 7.3°C, 0.5°C cooler than Seto, with 69 mm of rain.
Among the 303 cities listed in Japan, Seto ranks joint 151st of 303 for the warmest January highs and joint 37th of 303 for the driest January (rainfall, lowest first). The mean January high of those 303 cities is 7.0°C; Seto is 0.9°C warmer than that mean.
From January to February, average highs rise by 1.2°C to 9.0°C, and monthly rainfall rises from 54 mm to 61 mm.
The annual picture
January in context
Monthly rainfall
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
Seto climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January, selected | 7.8°C-1.1°C | -1.1°C | 54 | 5.7 | 10.110 h |
| February | 9.0°C-0.9°C | -0.9°C | 61 | 6.6 | 10.911 h |
| March | 12.9°C2.0°C | 2.0°C | 110 | 10.1 | 11.912 h |
| April | 18.0°C7.1°C | 7.1°C | 123 | 10.6 | 13.113 h |
| May | 22.5°C12.5°C | 12.5°C | 144 | 10.6 | 14.014 h |
| June | 25.6°C17.4°C | 17.4°C | 178 | 14.3 | 14.514 h |
| July | 28.9°C21.8°C | 21.8°C | 190 | 14.9 | 14.314 h |
| August | 30.5°C22.9°C | 22.9°C | 111 | 11.7 | 13.513 h |
| September | 26.9°C19.2°C | 19.2°C | 186 | 12.1 | 12.412 h |
| October | 21.4°C12.8°C | 12.8°C | 171 | 10.3 | 11.311 h |
| November | 15.7°C6.4°C | 6.4°C | 85 | 7.2 | 10.310 h |
| December | 10.2°C1.1°C | 1.1°C | 55 | 6.0 | 9.810 h |
Rainfall is the average of the 30 separate monthly totals. A rain 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
- Tajimi in JanuaryJapan · 10 kmHigh 7.3°C · Low -1.5°C · 69 mm rain
- Kasugai in JanuaryJapan · 12 kmHigh 8.3°C · Low -1.0°C · 54 mm rain
- Toyota in JanuaryJapan · 17 kmHigh 8.4°C · Low -0.9°C · 63 mm rain
- Komaki in JanuaryJapan · 18 kmHigh 7.9°C · Low -1.4°C · 54 mm rain
- Nagoya in JanuaryJapan · 19 kmHigh 8.1°C · Low -0.9°C · 54 mm rain
- Kani in JanuaryJapan · 19 kmHigh 7.1°C · Low -1.8°C · 66 mm rain
- Ama in JanuaryJapan · 28 kmHigh 8.1°C · Low -0.6°C · 63 mm rain
- Ichinomiya in JanuaryJapan · 28 kmHigh 7.7°C · Low -1.1°C · 63 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 Seto) is explained once on the Seto year overview and on the Sources, method and limits page.
Nagoya, Kasugai and Komaki lie in the same rainfall cell, so their rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.