Climate averages 1991–2020
Yamaguchi weather
in October.
A mild, wet month: the 6th warmest and the 5th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
October is a mild month in Yamaguchi: daytime highs average 21.6°C and nights cool to about 13.7°C. By daytime temperature it is the 6th warmest of the 12 months.
Expect about 97 mm of rain on roughly 8 days, which makes October a wet month (the 5th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 21 min on an average October day.
The nearest other city in this atlas is Hōfu (17 km away). In October its highs average 22.1°C, 0.6°C warmer than Yamaguchi, with 102 mm of rain.
Among the 303 cities listed in Japan, Yamaguchi ranks joint 62nd of 303 for the warmest October highs and 9th of 303 for the driest October (rainfall, lowest first). The mean October high of those 303 cities is 20.4°C; Yamaguchi is 1.2°C warmer than that mean.
From October to November, average highs fall by 5.8°C to 15.7°C, and monthly rainfall falls from 97 mm to 78 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
Yamaguchi climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 7.7°C1.5°C | 1.5°C | 61 | 9.7 | 10.210 h |
| February | 9.0°C1.6°C | 1.6°C | 72 | 10.0 | 10.911 h |
| March | 12.7°C4.0°C | 4.0°C | 117 | 11.4 | 11.912 h |
| April | 17.9°C8.4°C | 8.4°C | 130 | 10.6 | 13.013 h |
| May | 22.4°C13.2°C | 13.2°C | 150 | 10.5 | 13.914 h |
| June | 25.6°C17.9°C | 17.9°C | 248 | 14.3 | 14.414 h |
| July | 28.8°C22.3°C | 22.3°C | 283 | 16.3 | 14.214 h |
| August | 30.2°C23.4°C | 23.4°C | 167 | 14.2 | 13.413 h |
| September | 26.7°C19.6°C | 19.6°C | 178 | 12.4 | 12.412 h |
| October, selected | 21.6°C13.7°C | 13.7°C | 97 | 8.1 | 11.411 h |
| November | 15.7°C8.3°C | 8.3°C | 78 | 8.2 | 10.410 h |
| December | 10.0°C3.6°C | 3.6°C | 64 | 9.7 | 9.910 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
- Hōfu in OctoberJapan · 17 kmHigh 22.1°C · Low 15.0°C · 102 mm rain
- Ube in OctoberJapan · 33 kmHigh 21.6°C · Low 16.2°C · 100 mm rain
- Shūnan in OctoberJapan · 35 kmHigh 20.1°C · Low 13.4°C · 113 mm rain
- Yukuhashi in OctoberJapan · 67 kmHigh 21.7°C · Low 15.4°C · 100 mm rain
- Kitakyushu in OctoberJapan · 68 kmHigh 21.4°C · Low 15.9°C · 93 mm rain
- Iwakuni in OctoberJapan · 69 kmHigh 21.5°C · Low 15.5°C · 116 mm rain
- Nakatsu in OctoberJapan · 70 kmHigh 22.0°C · Low 15.6°C · 111 mm rain
- Hatsukaichi in OctoberJapan · 82 kmHigh 22.0°C · Low 14.5°C · 116 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 Yamaguchi) is explained once on the Yamaguchi year overview and on the Sources, method and limits page.