Climate averages 1991–2020
Iwaki weather
in June.
A warm, wet month: the 4th warmest and the 9th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
June is a warm month in Iwaki: daytime highs average 22.6°C and nights cool to about 16.8°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 146 mm of rain on roughly 14 days, which makes June a wet month (the 9th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 40 min on an average June day.
The nearest other city in this atlas is Sukagawa (51 km away). In June its highs average 23.3°C, 0.7°C warmer than Iwaki, with 131 mm of rain.
Among the 303 cities listed in Japan, Iwaki ranks joint 268th of 303 for the warmest June highs and 47th of 303 for the driest June (rainfall, lowest first). The mean June high of those 303 cities is 24.4°C; Iwaki is 1.7°C cooler than that mean.
From June to July, average highs rise by 3.4°C to 26.0°C, and monthly rainfall rises from 146 mm to 175 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
Iwaki climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 6.9°C1.1°C | 1.1°C | 71 | 7.9 | 9.910 h |
| February | 7.4°C0.8°C | 0.8°C | 69 | 8.0 | 10.811 h |
| March | 10.7°C3.1°C | 3.1°C | 125 | 12.1 | 11.912 h |
| April | 15.5°C7.7°C | 7.7°C | 134 | 11.9 | 13.113 h |
| May | 19.8°C12.6°C | 12.6°C | 145 | 12.0 | 14.114 h |
| June, selected | 22.6°C16.8°C | 16.8°C | 146 | 13.7 | 14.715 h |
| July | 26.0°C20.7°C | 20.7°C | 175 | 14.5 | 14.414 h |
| August | 27.5°C22.3°C | 22.3°C | 126 | 11.8 | 13.614 h |
| September | 24.5°C19.4°C | 19.4°C | 192 | 14.1 | 12.512 h |
| October | 19.6°C14.1°C | 14.1°C | 223 | 13.4 | 11.311 h |
| November | 14.6°C8.3°C | 8.3°C | 111 | 9.8 | 10.210 h |
| December | 9.4°C3.5°C | 3.5°C | 73 | 8.6 | 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
June in nearby cities
- Sukagawa in JuneJapan · 51 kmHigh 23.3°C · Low 14.9°C · 131 mm rain
- Hitachi in JuneJapan · 54 kmHigh 22.9°C · Low 17.3°C · 148 mm rain
- Kōriyama in JuneJapan · 59 kmHigh 23.4°C · Low 15.0°C · 112 mm rain
- Nasushiobara in JuneJapan · 73 kmHigh 23.4°C · Low 15.1°C · 176 mm rain
- Ōtawara in JuneJapan · 78 kmHigh 23.5°C · Low 15.2°C · 163 mm rain
- Hitachi-Naka in JuneJapan · 79 kmHigh 22.4°C · Low 17.1°C · 151 mm rain
- Fukushima in JuneJapan · 86 kmHigh 23.5°C · Low 15.0°C · 133 mm rain
- Mito in JuneJapan · 87 kmHigh 23.4°C · Low 17.0°C · 159 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 Iwaki) is explained once on the Iwaki year overview and on the Sources, method and limits page.