Climate averages 1991–2020
Onomichi weather
in June.
A warm, very wet month: the 4th warmest and the 11th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
June is a warm month in Onomichi: daytime highs average 25.3°C and nights cool to about 18.4°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 182 mm of rain on roughly 12 days, which makes June a very wet month (the 11th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 25 min on an average June day.
The nearest other city in this atlas is Mihara (11 km away). In June its highs average 25.9°C, 0.5°C warmer than Onomichi, with 192 mm of rain.
Among the 303 cities listed in Japan, Onomichi ranks joint 92nd of 303 for the warmest June highs and joint 142nd of 303 for the driest June (rainfall, lowest first). The mean June high of those 303 cities is 24.4°C; Onomichi is 0.9°C warmer than that mean.
From June to July, average highs rise by 3.5°C to 28.8°C, and monthly rainfall rises from 182 mm to 189 mm.
The annual picture
June 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, selected | 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 | 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
June in nearby cities
- Mihara in JuneJapan · 11 kmHigh 25.9°C · Low 18.6°C · 192 mm rain
- Fukuyama in JuneJapan · 17 kmHigh 25.9°C · Low 18.7°C · 182 mm rain
- Higashihiroshima in JuneJapan · 42 kmHigh 24.8°C · Low 17.7°C · 201 mm rain
- Imabari in JuneJapan · 43 kmHigh 24.9°C · Low 19.8°C · 249 mm rain
- Niihama in JuneJapan · 52 kmHigh 25.8°C · Low 19.5°C · 249 mm rain
- Kurashiki in JuneJapan · 55 kmHigh 25.6°C · Low 18.9°C · 178 mm rain
- Marugame in JuneJapan · 56 kmHigh 24.3°C · Low 19.1°C · 191 mm rain
- Saijō in JuneJapan · 56 kmHigh 26.8°C · Low 20.1°C · 249 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.