Climate averages 1991–2020
Onomichi weather
in October.
A mild, wet month: the 6th warmest and the 6th driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
October is a mild month in Onomichi: daytime highs average 21.5°C and nights cool to about 14.3°C. By daytime temperature it is the 6th warmest of the 12 months.
Expect about 105 mm of rain on roughly 7 days, which makes October a wet month (the 6th 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 Mihara (11 km away). In October its highs average 21.8°C, about as warm as Onomichi, with 103 mm of rain.
Among the 303 cities listed in Japan, Onomichi ranks joint 69th of 303 for the warmest October highs and joint 29th of 303 for the driest October (rainfall, lowest first). The mean October high of those 303 cities is 20.4°C; Onomichi is 1.1°C warmer than that mean.
From October to November, average highs fall by 5.5°C to 16.0°C, and monthly rainfall falls from 105 mm to 55 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
Onomichi climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 8.5°C1.5°C | 1.5°C | 42 | 5.7 | 10.110 h |
| February | 9.6°C1.6°C | 1.6°C | 54 | 7.2 | 10.911 h |
| March | 12.9°C4.2°C | 4.2°C | 92 | 9.7 | 11.912 h |
| April | 17.9°C8.9°C | 8.9°C | 107 | 9.6 | 13.013 h |
| May | 22.4°C13.8°C | 13.8°C | 124 | 10.0 | 13.914 h |
| June | 25.3°C18.4°C | 18.4°C | 182 | 12.0 | 14.414 h |
| July | 28.8°C22.8°C | 22.8°C | 189 | 13.6 | 14.214 h |
| August | 30.5°C24.0°C | 24.0°C | 107 | 10.8 | 13.413 h |
| September | 26.9°C20.3°C | 20.3°C | 145 | 10.7 | 12.412 h |
| October, selected | 21.5°C14.3°C | 14.3°C | 105 | 7.3 | 11.311 h |
| November | 16.0°C8.6°C | 8.6°C | 55 | 6.1 | 10.410 h |
| December | 10.7°C3.8°C | 3.8°C | 47 | 5.6 | 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
- Mihara in OctoberJapan · 11 kmHigh 21.8°C · Low 14.2°C · 103 mm rain
- Fukuyama in OctoberJapan · 17 kmHigh 22.0°C · Low 14.6°C · 105 mm rain
- Higashihiroshima in OctoberJapan · 42 kmHigh 20.8°C · Low 13.2°C · 102 mm rain
- Imabari in OctoberJapan · 43 kmHigh 21.4°C · Low 16.8°C · 148 mm rain
- Niihama in OctoberJapan · 52 kmHigh 21.9°C · Low 15.7°C · 166 mm rain
- Kurashiki in OctoberJapan · 55 kmHigh 21.8°C · Low 15.0°C · 121 mm rain
- Marugame in OctoberJapan · 56 kmHigh 20.8°C · Low 15.8°C · 134 mm rain
- Saijō in OctoberJapan · 56 kmHigh 22.4°C · Low 16.0°C · 166 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 Onomichi) is explained once on the Onomichi year overview and on the Sources, method and limits page.
Fukuyama lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.