Date climate by month
What the weather is like
Date has a warm-summer humid continental climate (Köppen Dfb): warm summers, cold winters and precipitation in every season.
The warmest month is August, when afternoons average 24° and nights 19°. January is the coolest month, with highs of -2° and lows of -8°. The difference between the warmest and the coolest month is about 26°, a large swing typical of continental interiors.
About 1,644 mm of precipitation falls in an average year. December is the wettest month (111 mm, 23 wet days) and April the driest (101 mm, 11 wet days). Cloud cover ranges from 34% in October to 53% in July.
The sea reaches about 21° 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, Date is 5.9° cooler on a August afternoon and receives more precipitation over the year.
Year in figures
- Hottest afternoons
- 24° · August
- Coldest nights
- -8° · January
- Wettest month
- December
- Driest month
- April
- Clearest skies
- October · 34% cloud
- Warmest sea
- 21° · August
- Longest day
- 15 h 16 min
- Shortest day
- 9 h 06 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 | -2° | -1° | 2° | 8° | 13° | 18° | 21° | 24° | 21° | 14° | 6° | 1° |
| Average low | -8° | -7° | -4° | 1° | 7° | 12° | 16° | 19° | 15° | 8° | 1° | -5° |
| Precipitation | 105 mm | 79 mm | 79 mm | 101 mm | 127 mm | 122 mm | 196 mm | 250 mm | 212 mm | 134 mm | 128 mm | 111 mm |
| Wet days (≥1 mm) | 20.3 | 17.7 | 13.3 | 10.8 | 13.3 | 13.5 | 14.3 | 20.5 | 14 | 16 | 17.5 | 23 |
| Cloud cover | 44% | 43% | 39% | 40% | 45% | 49% | 53% | 50% | 43% | 34% | 38% | 43% |
| Sea temperature | 6° | 4° | 4° | 6° | 9° | 14° | 18° | 21° | 20° | 17° | 12° | 9° |
| Daylight | 9h 24 | 10h 33 | 11h 52 | 13h 20 | 14h 35 | 15h 16 | 15h 01 | 13h 57 | 12h 33 | 11h 08 | 9h 49 | 9h 06 |
| Month score | 19 | 20 | 23 | 28 | 38 | 59 | 57 | 59 | 62 | 44 | 22 | 20 |