Watari climate by month
What the weather is like
Watari 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 26° and nights 22°. January is the coolest month, with highs of 5° and lows of 0°. The difference between the warmest and the coolest month is about 21°, a large swing typical of continental interiors.
About 1,435 mm of precipitation falls in an average year. August is the wettest month (186 mm, 18 wet days) and April the driest (107 mm, 11 wet days). Cloud cover ranges from 30% in December to 57% in June.
The sea reaches about 24° 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, Watari is 3.7° cooler on a August afternoon and receives less precipitation over the year.
Year in figures
- Hottest afternoons
- 26° · August
- Coldest nights
- 0° · February
- Wettest month
- August
- Driest month
- April
- Clearest skies
- December · 30% cloud
- Warmest sea
- 24° · August
- Longest day
- 14 h 47 min
- Shortest day
- 9 h 33 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 | 5° | 5° | 8° | 13° | 17° | 20° | 23° | 26° | 23° | 18° | 13° | 8° |
| Average low | 0° | 0° | 2° | 7° | 12° | 16° | 20° | 22° | 19° | 13° | 7° | 3° |
| Precipitation | 52 mm | 50 mm | 82 mm | 107 mm | 123 mm | 163 mm | 197 mm | 186 mm | 198 mm | 150 mm | 79 mm | 48 mm |
| Wet days (≥1 mm) | 16.3 | 13.8 | 12.5 | 10.8 | 11.7 | 13.2 | 18.2 | 18.3 | 16.3 | 12.8 | 12.5 | 18.3 |
| Cloud cover | 33% | 35% | 38% | 40% | 48% | 57% | 56% | 46% | 49% | 39% | 33% | 30% |
| Sea temperature | 11° | 9° | 9° | 10° | 14° | 18° | 21° | 24° | 23° | 19° | 17° | 14° |
| Daylight | 9h 48 | 10h 46 | 11h 54 | 13h 09 | 14h 12 | 14h 47 | 14h 34 | 13h 40 | 12h 29 | 11h 16 | 10h 09 | 9h 33 |
| Month score | 24 | 23 | 25 | 45 | 60 | 58 | 56 | 57 | 59 | 66 | 44 | 25 |