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Itami climate by month
What the weather is like
Itami has a humid subtropical climate (Köppen Cfa): rain spread through the year and no real dry season.
The warmest month is August, when afternoons average 31° and nights 24°. January is the coolest month, with highs of 8° and lows of 1°. The difference between the warmest and the coolest month is about 23°, a large swing typical of continental interiors.
About 1,395 mm of precipitation falls in an average year. July is the wettest month (174 mm, 18 wet days) and April the driest (114 mm, 11 wet days). Cloud cover ranges from 27% in December to 57% in June.
The sea reaches about 27° in August. Sea temperatures lag the air by a month or two, so late summer is usually warmer for swimming than early summer.
Compared with Tokyo, the capital, Itami is 1.8° warmer on a August afternoon and receives less precipitation over the year.
Year in figures
- Hottest afternoons
- 31° · August
- Coldest nights
- 1° · January
- Wettest month
- July
- Driest month
- April
- Clearest skies
- December · 27% cloud
- Warmest sea
- 27° · August
- Longest day
- 14 h 28 min
- Shortest day
- 9 h 50 min
Twelve months at a glance
Temperature and precipitation
Daily high/low range bars, monthly precipitation columns, sea temperature lineTemperature curve
Average high, low and seaDaylight
Hours between sunrise and sunset on the 15th of each monthClimate normals month by month
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Average high | 8° | 9° | 12° | 18° | 23° | 26° | 30° | 31° | 27° | 21° | 16° | 11° |
| Average low | 1° | 1° | 4° | 9° | 14° | 19° | 23° | 24° | 21° | 14° | 8° | 3° |
| Precipitation | 47 mm | 67 mm | 111 mm | 114 mm | 161 mm | 200 mm | 174 mm | 110 mm | 170 mm | 118 mm | 76 mm | 47 mm |
| Wet days (≥1 mm) | 15.8 | 14.2 | 12.3 | 11.2 | 12.7 | 14 | 18 | 17.5 | 17.8 | 13.7 | 12.2 | 18 |
| Cloud cover | 31% | 35% | 41% | 42% | 47% | 57% | 48% | 35% | 40% | 34% | 31% | 27% |
| Sea temperature | 14° | 13° | 13° | 15° | 18° | 21° | 25° | 27° | 26° | 23° | 20° | 17° |
| Daylight | 10h 04 | 10h 55 | 11h 55 | 13h 02 | 13h 58 | 14h 28 | 14h 17 | 13h 30 | 12h 26 | 11h 22 | 10h 22 | 9h 50 |
| Month score | 25 | 23 | 36 | 69 | 63 | 51 | 41 | 39 | 53 | 66 | 59 | 29 |