Anan climate by month
What the weather is like
Anan 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 28° and nights 26°. January is the coolest month, with highs of 10° and lows of 6°. The difference between the warmest and the coolest month is about 18°.
About 1,819 mm of precipitation falls in an average year. September is the wettest month (267 mm, 18 wet days) and January the driest (51 mm, 6 wet days). Cloud cover ranges from 28% 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, Anan is 1.4° cooler on a August afternoon and receives more precipitation over the year.
Year in figures
- Hottest afternoons
- 28° · August
- Coldest nights
- 6° · January
- Wettest month
- September
- Driest month
- January
- Clearest skies
- December · 28% cloud
- Warmest sea
- 27° · August
- Longest day
- 14 h 24 min
- Shortest day
- 9 h 55 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 | 10° | 11° | 13° | 17° | 20° | 23° | 27° | 28° | 26° | 22° | 17° | 13° |
| Average low | 6° | 6° | 9° | 13° | 17° | 21° | 24° | 26° | 23° | 18° | 14° | 9° |
| Precipitation | 51 mm | 72 mm | 124 mm | 139 mm | 188 mm | 238 mm | 189 mm | 208 mm | 267 mm | 174 mm | 115 mm | 54 mm |
| Wet days (≥1 mm) | 5.8 | 6.5 | 10.7 | 10.5 | 13 | 15.7 | 15.8 | 16.5 | 17.8 | 11.8 | 6.8 | 6 |
| Cloud cover | 33% | 36% | 41% | 42% | 48% | 57% | 47% | 34% | 39% | 34% | 32% | 28% |
| Sea temperature | 17° | 15° | 16° | 17° | 19° | 22° | 25° | 27° | 26° | 24° | 22° | 19° |
| Daylight | 10h 08 | 10h 58 | 11h 55 | 13h 00 | 13h 54 | 14h 24 | 14h 13 | 13h 27 | 12h 25 | 11h 23 | 10h 26 | 9h 55 |
| Month score | 45 | 44 | 46 | 67 | 62 | 56 | 52 | 53 | 59 | 71 | 79 | 59 |