Climate averages 1991–2020
Jōetsu weather
in October.
A mild, wet month: the 6th warmest and the 7th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
October is a mild month in Jōetsu: daytime highs average 19.6°C and nights cool to about 12.4°C. By daytime temperature it is the 6th warmest of the 12 months.
Expect about 164 mm of rain on roughly 15 days, which makes October a wet month (the 7th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 16 min on an average October day.
The nearest other city in this atlas is Kashiwazaki (37 km away). In October its highs average 19.5°C, about as warm as Jōetsu, with 159 mm of rain.
Among the 303 cities listed in Japan, Jōetsu ranks joint 234th of 303 for the warmest October highs and joint 137th of 303 for the driest October (rainfall, lowest first). The mean October high of those 303 cities is 20.4°C; Jōetsu is 0.8°C cooler than that mean.
From October to November, average highs fall by 5.8°C to 13.7°C, and monthly rainfall rises from 164 mm to 180 mm.
The annual picture
October 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
Jōetsu climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 4.1°C-1.1°C | -1.1°C | 254 | 26.0 | 9.910 h |
| February | 4.6°C-1.3°C | -1.3°C | 179 | 21.4 | 10.811 h |
| March | 8.3°C0.6°C | 0.6°C | 145 | 19.6 | 11.912 h |
| April | 15.2°C5.4°C | 5.4°C | 97 | 13.4 | 13.113 h |
| May | 21.0°C11.5°C | 11.5°C | 92 | 11.6 | 14.114 h |
| June | 24.4°C16.4°C | 16.4°C | 115 | 11.5 | 14.715 h |
| July | 27.8°C20.9°C | 20.9°C | 191 | 14.4 | 14.414 h |
| August | 29.3°C22.2°C | 22.2°C | 122 | 12.1 | 13.614 h |
| September | 25.2°C18.4°C | 18.4°C | 162 | 14.1 | 12.512 h |
| October, selected | 19.6°C12.4°C | 12.4°C | 164 | 15.1 | 11.311 h |
| November | 13.7°C6.4°C | 6.4°C | 180 | 18.5 | 10.210 h |
| December | 7.4°C1.2°C | 1.2°C | 247 | 24.2 | 9.710 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
October in nearby cities
- Kashiwazaki in OctoberJapan · 37 kmHigh 19.5°C · Low 12.0°C · 159 mm rain
- Nagano in OctoberJapan · 56 kmHigh 18.0°C · Low 9.5°C · 161 mm rain
- Nagaoka in OctoberJapan · 64 kmHigh 19.5°C · Low 11.3°C · 143 mm rain
- Sanjō in OctoberJapan · 82 kmHigh 19.4°C · Low 11.5°C · 157 mm rain
- Ueda in OctoberJapan · 83 kmHigh 18.4°C · Low 9.8°C · 150 mm rain
- Tsubame in OctoberJapan · 84 kmHigh 19.2°C · Low 12.4°C · 146 mm rain
- Shibukawa in OctoberJapan · 100 kmHigh 19.0°C · Low 11.9°C · 180 mm rain
- Azumino in OctoberJapan · 101 kmHigh 18.4°C · Low 9.5°C · 193 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 Jōetsu) is explained once on the Jōetsu year overview and on the Sources, method and limits page.