Climate averages 1991–2020
Ōmihachiman weather
in January.
A cold, moderately wet month: the coolest and the joint 3rd driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
January is a cold month in Ōmihachiman: daytime highs average 7.1°C and nights cool to about 0.0°C. By daytime temperature it is the coolest month of the year.
Expect about 81 mm of rain on roughly 14 days, which makes January a moderately wet month (the joint 3rd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 10 h 05 min on an average January day.
The nearest other city in this atlas is Youkaichi (9 km away). In January its highs average 7.0°C, about as warm as Ōmihachiman, with 62 mm of rain.
Among the 303 cities listed in Japan, Ōmihachiman ranks joint 212th of 303 for the warmest January highs and joint 231st of 303 for the driest January (rainfall, lowest first). The mean January high of those 303 cities is 7.0°C; Ōmihachiman is 0.2°C warmer than that mean.
From January to February, average highs rise by 0.9°C to 8.0°C, and monthly rainfall falls from 81 mm to 78 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
Ōmihachiman climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January, selected | 7.1°C0.0°C | 0.0°C | 81 | 13.9 | 10.110 h |
| February | 8.0°C0.0°C | 0.0°C | 78 | 13.0 | 10.911 h |
| March | 11.8°C2.6°C | 2.6°C | 116 | 13.5 | 11.912 h |
| April | 17.2°C7.4°C | 7.4°C | 123 | 11.6 | 13.113 h |
| May | 21.9°C12.6°C | 12.6°C | 148 | 11.6 | 14.014 h |
| June | 25.3°C17.3°C | 17.3°C | 186 | 14.0 | 14.514 h |
| July | 28.9°C21.8°C | 21.8°C | 210 | 15.9 | 14.314 h |
| August | 30.2°C22.8°C | 22.8°C | 122 | 12.3 | 13.513 h |
| September | 26.2°C19.1°C | 19.1°C | 179 | 12.3 | 12.412 h |
| October | 20.5°C13.2°C | 13.2°C | 152 | 10.8 | 11.311 h |
| November | 15.1°C7.5°C | 7.5°C | 81 | 9.0 | 10.410 h |
| December | 9.6°C2.4°C | 2.4°C | 75 | 11.6 | 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
- Youkaichi in JanuaryJapan · 9 kmHigh 7.0°C · Low -0.2°C · 62 mm rain
- Moriyama in JanuaryJapan · 12 kmHigh 7.1°C · Low 0.0°C · 61 mm rain
- Kusatsu in JanuaryJapan · 17 kmHigh 7.2°C · Low -0.2°C · 61 mm rain
- Kōka in JanuaryJapan · 17 kmHigh 7.0°C · Low -0.4°C · 62 mm rain
- Hikone in JanuaryJapan · 19 kmHigh 6.7°C · Low 0.7°C · 74 mm rain
- Ōtsu in JanuaryJapan · 25 kmHigh 7.0°C · Low -0.5°C · 64 mm rain
- Nagahama in JanuaryJapan · 32 kmHigh 6.3°C · Low 0.2°C · 113 mm rain
- Kyoto in JanuaryJapan · 33 kmHigh 7.5°C · Low 0.0°C · 64 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 Ōmihachiman) is explained once on the Ōmihachiman year overview and on the Sources, method and limits page.