Climate averages 1991–2020
Iwaki weather
in July.
A warm, wet month: the 2nd warmest and the 10th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
July is a warm month in Iwaki: daytime highs average 26.0°C and nights cool to about 20.7°C. By daytime temperature it is the 2nd warmest of the 12 months.
Expect about 175 mm of rain on roughly 15 days, which makes July a wet month (the 10th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 26 min on an average July day.
The nearest other city in this atlas is Sukagawa (51 km away). In July its highs average 26.6°C, 0.6°C warmer than Iwaki, with 187 mm of rain.
Among the 303 cities listed in Japan, Iwaki ranks joint 264th of 303 for the warmest July highs and 85th of 303 for the driest July (rainfall, lowest first). The mean July high of those 303 cities is 27.9°C; Iwaki is 1.8°C cooler than that mean.
From July to August, average highs rise by 1.4°C to 27.5°C, and monthly rainfall falls from 175 mm to 126 mm.
The annual picture
July 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 | 22.6°C16.8°C | 16.8°C | 146 | 13.7 | 14.715 h |
| July, selected | 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
July in nearby cities
- Sukagawa in JulyJapan · 51 kmHigh 26.6°C · Low 19.2°C · 187 mm rain
- Hitachi in JulyJapan · 54 kmHigh 26.4°C · Low 21.3°C · 162 mm rain
- Kōriyama in JulyJapan · 59 kmHigh 26.6°C · Low 19.3°C · 173 mm rain
- Nasushiobara in JulyJapan · 73 kmHigh 26.7°C · Low 19.4°C · 240 mm rain
- Ōtawara in JulyJapan · 78 kmHigh 26.8°C · Low 19.5°C · 212 mm rain
- Hitachi-Naka in JulyJapan · 79 kmHigh 25.9°C · Low 21.0°C · 178 mm rain
- Fukushima in JulyJapan · 86 kmHigh 26.8°C · Low 19.4°C · 193 mm rain
- Mito in JulyJapan · 87 kmHigh 26.9°C · Low 21.0°C · 162 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.