Azumino, nestled at the foot of the Japanese Alps in Nagano Prefecture, experiences a humid continental climate with dramatic seasonal contrasts. Summers are warm and lush, while winters are cold and snowy. The area is known for abundant rainfall, crystal-clear spring water, and beautiful natural scenery, making it a year-round destination for outdoor enthusiasts.
Azumino’s climate is shaped by its location near the Japan Alps, resulting in four distinct seasons and significant annual temperature variation. Summers (June to September) are comfortably warm, with average highs reaching 27°C in August. The region receives abundant rainfall, especially in July, which is the wettest month with around 184–313 mm of precipitation and frequent rainy days. Humidity peaks during the summer, but the mountain air and lush greenery make it a pleasant time for outdoor activities.
Winters (December to February) are cold and snowy, with average highs around 0–3°C and lows dropping to -9°C in January. Snowfall is frequent and heavy, especially from December to February, creating ideal conditions for winter sports and picturesque alpine landscapes. Spring and autumn are transitional and often considered the most comfortable seasons; spring brings cherry blossoms and mild temperatures (up to 20°C by May), while autumn offers crisp air and vibrant foliage. Sunshine hours peak in April and May (up to 10.5 hours/day), while winter months are cloudier with shorter daylight. Winds are generally light, though breezier days occur in late winter and early spring.
Azumino’s abundant, clear spring water – fed by melting snow from the Alps – supports thriving wasabi farms and lush rice paddies. The climate’s extremes, from snowy winters to verdant summers, contribute to the area’s rich agricultural and natural beauty, making Azumino a rewarding destination in any season.
| Average climate data for Azumino, Japan | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Average maximum temperature (°C) | 0 | 2 | 7 | 13 | 20 | 22 | 26 | 28 | 22 | 17 | 11 | 4 | 28 |
| Average minimum temperature (°C) | -9 | -8 | -4 | 1 | 6 | 10 | 15 | 16 | 11 | 6 | 1 | -4 | -9 |
| Average precipitation (mm) | 63 | 60 | 89 | 85 | 85 | 139 | 185 | 106 | 78 | 121 | 56 | 77 | 1,143 |
| Average rainfall days (days) | 14 | 13 | 17 | 17 | 17 | 21 | 25 | 24 | 18 | 16 | 14 | 16 | 213 |
| Average snowfall (mm) | 314 | 172 | 207 | 32 | 0 | 0 | 0 | 0 | 0 | 0 | 16 | 248 | 990 |
| Average snowfall days (days) | 21 | 13 | 10 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 15 | 63 |
| Average relative humidity (%) | 80 | 81 | 76 | 72 | 69 | 80 | 84 | 81 | 82 | 82 | 78 | 78 | 78 |
| Average wind speed (km/h) | 8 | 8 | 9 | 8 | 7 | 6 | 6 | 5 | 6 | 7 | 7 | 9 | 7 |
| Average water temperature (°C) | 28 | 28 | 29 | 30 | 30 | 30 | 29 | 29 | 29 | 29 | 30 | 29 | 29 |
| Average daily daylight hours (h) | 11 | 11 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 11 | 11 | 11 | 12 |
| Average daily sunshine hours (h) | 6 | 6 | 7 | 10 | 10 | 10 | 9 | 10 | 8 | 7 | 6 | 6 | 8 |
| Average cloud coverage (%) | 38 | 37 | 38 | 36 | 32 | 42 | 48 | 45 | 44 | 40 | 30 | 38 | 39 |
| Average UV index | 2 | 2 | 2 | 3 | 4 | 5 | 6 | 5 | 4 | 3 | 2 | 1 | 3 |
The best times to visit Azumino are late spring (April to May) and autumn (October to early November). During these months, the weather is mild, rainfall is lower, and the landscape is especially beautiful with cherry blossoms or autumn colours. These seasons are ideal for sightseeing, cycling, and hiking in the surrounding nature.
The least favourable time to visit Azumino is during the peak of the rainy season in July, when heavy rainfall and high humidity can disrupt outdoor plans. Winter (December to February) is also challenging for non-skiers, as cold temperatures and frequent snow may limit accessibility and comfort for general sightseeing.
Azumino’s average annual temperature is around 12°C. Winters are cold, with January highs near 0°C and lows around -9°C, while summers are warm, peaking at 27°C in August.
Yes, Azumino experiences heavy snowfall from December to February, with frequent snow days and significant accumulation, especially in January. This makes it a popular area for winter sports and scenic winter landscapes.
The rainy season in Azumino typically occurs from June to July, with July being the wettest month. Travellers should expect frequent rain and plan for indoor activities or bring appropriate rain gear.
April and May are the sunniest months in Azumino, with up to 10.5 hours of sunshine daily. Winter months are cloudier and have shorter daylight hours.
Pack layered clothing for spring and autumn, rain gear for the summer rainy season, and warm, waterproof clothing and boots for winter. Evenings can be chilly year-round, especially in the mountains.
Yes, Azumino is ideal for outdoor activities such as hiking, cycling, and skiing. Summer and autumn are best for hiking and cycling, while winter is perfect for snow sports. Always check local weather forecasts before venturing out.
Azumino receives about 1,000–2,300 mm of precipitation annually, with the heaviest rainfall in July. November is typically the driest month.
The warmest month, with the highest average maximum temperature, is August (27.5 °C). The month with the lowest average maximum temperature is January (0.3 °C). Overall, the average maximum temperature over the whole year is 14.2 °C.
The month with the highest average minimum temperature is August (16 °C). The coldest month, with the lowest average minimum temperature, is January (-8.8 °C). Overall, the average minimum temperature over the whole year is 3.5 °C.
The month with the highest average water temperature is May (30.3 °C). The month with the lowest average water temperature is January (27.9 °C). Overall, the average water temperature over the whole year is 29.1 °C.
The wettest month, with the highest amount of precipitation, is July (185.2 mm). The driest month, with the least amount of precipitation, is November (55.6 mm). Over the whole year there are 1,143.3 mm of rainfall on average.
The month with the most days of rain is July (24.6 days). The month with the fewest days of rain is February (13.2 days). Over the whole year there are 212.9 days of rain on average.
The month with the most snowfall is January (314.4 mm). The months with the least snowfall are May, June, July, August, September and October (0 mm). Over the whole year there are 989.9 mm of snowfall on average.
The month with the most days of snowfall is January (20.8 days). The months with the fewest days of snowfall are May, June, August and October (0 days). Over the whole year there are 63.3 days of snowfall on average.
The month with the highest average relative humidity is July (83.7 %). The month with the lowest average relative humidity is May (68.9 %). The overall average relative humidity over the whole year is 78.4 %.
The windiest month, with the highest average wind speed, is March (8.6 km/h). The calmest month, with the lowest average wind speed, is August (5.4 km/h). The overall average wind speed over the whole year is 7.2 km/h.
The month with the cloudiest skies, so the highest cloud coverage, is July (47.7 %). The month with the clearest skies, so the lowest cloud coverage, is November (30.3 %). Over the whole year there is an average cloud coverage of 38.9 %.
The month with the longest days, so the most daylight, is June (Average daylight: 12.1 h). The months with the shortest days, so the least daylight, are January and December (Average daylight: 11 h). Over the whole year there are 11.6 h of daylight per day on average.
The month with the most sunshine per day is June (Average sunshine: 10.1 h). The month with the least sunshine per day is January (Average sunshine: 5.9 h). Over the whole year there are 8 h of sunlight per day on average.
The month with the highest average UV index is July (UV index: 6). The month with the lowest average UV index is December (UV index: 1). Over the whole year the average UV index is 3.2.
