Aizu-Wakamatsu climate
Aizu-Wakamatsu (Japan) has a hot-summer humid continental climate (Köppen Dfa). The average temperature over the year is 12 °C54 °F, and about 1,349 mm53 in of precipitation falls in an average year.
Temperature by month
Precipitation by month
Aizu-Wakamatsu climate table
| Month | High °C°F | Low °C°F | Mean °C°F | Precip. mmin |
|---|---|---|---|---|
| Jan | 236 | −326 | −131 | 732.9 |
| Feb | 338 | −426 | 032 | 491.9 |
| Mar | 846 | −131 | 338 | 803.1 |
| Apr | 1559 | 439 | 1049 | 943.7 |
| May | 2170 | 1050 | 1660 | 983.9 |
| Jun | 2577 | 1559 | 2068 | 1275.0 |
| Jul | 2984 | 2067 | 2476 | 2068.1 |
| Aug | 3086 | 2169 | 2577 | 1515.9 |
| Sep | 2577 | 1662 | 2169 | 1586.2 |
| Oct | 1965 | 1050 | 1458 | 1556.1 |
| Nov | 1254 | 440 | 847 | 773.1 |
| Dec | 542 | 031 | 236 | 803.2 |
| Year | 3086 | −426 | 1254 | 1,34953 |
“Year” row: highest monthly high, lowest monthly low, annual mean and annual total.
| Month | Humid. | Cloud | Solar | Daylight |
|---|---|---|---|---|
| Jan | 94% | 89% | 1.6 | 9:50 |
| Feb | 92% | 85% | 2.4 | 10:45 |
| Mar | 86% | 80% | 3.5 | 11:51 |
| Apr | 81% | 74% | 4.4 | 13:07 |
| May | 80% | 72% | 5.2 | 14:10 |
| Jun | 82% | 79% | 5.0 | 14:44 |
| Jul | 85% | 82% | 4.5 | 14:30 |
| Aug | 84% | 72% | 4.7 | 13:36 |
| Sep | 86% | 75% | 3.8 | 12:22 |
| Oct | 87% | 75% | 2.9 | 11:09 |
| Nov | 89% | 78% | 2.0 | 10:06 |
| Dec | 92% | 87% | 1.5 | 9:35 |
Humid. = average relative humidity at 2 m; cloud = average cloud amount; solar = average daily solar energy reaching the ground in kWh/m² (all-sky); daylight in hours:minutes, calculated for the 15th of each month.
What the climate of Aizu-Wakamatsu is like
The warmest month is August, with an average high of 30 °C86 °F and a low of 21 °C69 °F. The coldest is January, when highs average 2 °C36 °F and lows −3 °C26 °F. Seasons are strongly marked: the warmest month is on average 25.8 °C46.5 °F warmer than the coldest.
It is wet, with about 1,349 mm53 in of precipitation per year. The wettest three-month stretch is July–September, which brings 38% of the annual total. The wettest month is July (206 mm8.1 in), the driest is February (49 mm1.9 in).
Relative humidity ranges from 80% in May to 94% in January. The clearest skies (lowest average cloud amount, 72%) are typical of May. Average wind speed near the ground ranges from 2 km/h (1 mph) in August to 7 km/h (4 mph) in February. Daylight lasts from about 9.6 hours in December to 14.7 hours in June.
Best time to visit Aizu-Wakamatsu
Based on these averages, the most comfortable months for sightseeing and outdoor activities are May: average highs of 21 °C70 °F to 21 °C70 °F with 98 mm3.9 in to 98 mm3.9 in of precipitation per month.
The most challenging month is January, which is cold, with average highs of 2 °C36 °F.
Comfort score: months are ranked by how close they come to an average high of 21–28 °C (70–82 °F), lows above 5 °C (41 °F), little precipitation and moderate humidity. The best-ranked months of each place are recommended, even where none meets all of these. These are general rules of thumb applied to long-term averages.
What to pack for Aizu-Wakamatsu
- Winter (December–February) — highs 236 to 5 °C42 °F, lows −426 to 0 °C31 °F, about 67 mm2.7 in of precipitation a month. Pack a winter coat, hat, gloves and warm, non-slip boots and shoes with good grip, as frost is common.
- Spring (March–May) — highs 846 to 21 °C70 °F, lows −131 to 10 °C50 °F, about 91 mm3.6 in of precipitation a month. Pack long sleeves, a sweater and a medium jacket, an extra layer for the cooler mornings and evenings and an umbrella or light rain jacket.
- Summer (June–August) — highs 2577 to 30 °C86 °F, lows 1559 to 21 °C69 °F, about 161 mm6.3 in of precipitation a month. Pack light summer clothes such as T-shirts, shorts or light dresses and an umbrella or light rain jacket.
- Autumn (September–November) — highs 1254 to 25 °C77 °F, lows 440 to 16 °C62 °F, about 130 mm5.1 in of precipitation a month. Pack light layers — T-shirts plus a light sweater or jacket and an umbrella or light rain jacket.
How Aizu-Wakamatsu compares
Compared with Kōriyama, about 40 km to the east, Aizu-Wakamatsu has practically the same average temperature and receives a similar amount of precipitation. The difference is largest in July (0.7 °C1.3 °F warmer).
Of the 111 places in Japan covered by World Climates, Aizu-Wakamatsu is the 95th warmest by annual mean temperature and the 99th wettest by annual precipitation. See all of them on the Japan climate page.
Places in other countries with the most similar temperature and rainfall pattern: Staten Island (United States, Dfa), Stamford (United States, Dfa) and Philadelphia (United States, Dfa).
Nearby places
- Kōriyama 40 km · 12 °C53 °F · 1,302 mm51 in
- Fukushima 54 km · 12 °C54 °F · 1,363 mm54 in
- Nasushiobara 58 km · 12 °C54 °F · 1,405 mm55 in
- Yamagata 90 km · 10 °C51 °F · 1,363 mm54 in
- Niigata 93 km · 15 °C58 °F · 1,702 mm67 in
- Iwaki 96 km · 14 °C57 °F · 1,397 mm55 in
- Nagaoka 97 km · 14 °C57 °F · 1,922 mm76 in
- Utsunomiya 103 km · 13 °C56 °F · 1,474 mm58 in
Frequently asked questions
What is the warmest month in Aizu-Wakamatsu?
August is the warmest month in Aizu-Wakamatsu, with an average high of 30 °C (86 °F) and an average low of 21 °C (69 °F).
What is the coldest month in Aizu-Wakamatsu?
January is the coldest month, with an average high of 2 °C (36 °F) and an average low of -3 °C (26 °F).
When does it rain the most in Aizu-Wakamatsu?
July is the wettest month with about 206 mm (8.1 in) of precipitation; February is the driest with about 49 mm (1.9 in).
What is the best time to visit Aizu-Wakamatsu?
Judging by long-term averages, the most comfortable months are May.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.
The grid cell’s average elevation is 672 m, while Aizu-Wakamatsu lies at about 238 m. Temperatures on this page were therefore adjusted by +2.8 °C5.1 °F using the standard lapse rate of 6.5 °C per 1,000 m.