Shimo-suwa Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Shimo-suwa.
Climate overview of Shimo-suwa
Temperatures in Shimo-suwa, Nagano Prefecture, Japan, vary greatly throughout the year. August is the hottest month at 28°C (82°F), while January is the coldest at 3°C (37°F).
With around 1663 mm (65 in) of annual rain/snowfall, Shimo-suwa has a notably wet climate. The wettest month is July. Sunshine peaks in January, when the city sees around 6.8 hours of sunshine per day.
Shimo-suwa Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Shimo-suwa — and find the best time to visit.
Monthly Temperature in Shimo-suwa
The climate in Shimo-suwa is known for significant temperature differences throughout the year, making the weather dynamic. Average daytime temperatures reach a comfortable 28°C (82°F) in August. In January, the coolest month of the year, temperatures drop to a chilly 3°C (37°F).
At night, temperatures range from around 18°C (64°F) in August to -7°C (19°F) in January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Shimo-suwa
Shimo-suwa has a notably wet climate with abundant precipitation, recording 1663 mm (65 in) of rain/snowfall per year. Shimo-suwa can be quite wet during July, receiving approximately 203 mm (8 in) of precipitation over 22 rainy days.
In contrast, during the driest month (December), you will experience much drier conditions, with 87 mm (3.4 in) of precipitation spread across 16 snowy/rainy days days. For more details, please visit our Shimo-suwa Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Shimo-suwa
Shimo-suwa experiences moderate variation in sunshine hours across the seasons. With 6.8 hours daily sunshine in January, it dips to 4.7 hours in September, offering a balanced mix of sunny and overcast days.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Humidity in Shimo-suwa by Month
The relative humidity is high throughout the year in Shimo-suwa.
The city experiences its highest humidity in July, reaching 73%. In February, the humidity drops to its lowest level at 54%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit Shimo-suwa
The wettest months are June, July, September and October, when precipitation is at its highest. Planning your next adventure but unsure where to go? Our climate tool suggests perfect locations tailored to your preferred weather conditions. Discover your ideal travel destination with our weather planner.
Frequently asked questions about the climate in Shimo-suwa
What is the best time to visit Shimo-suwa?
May, August and September typically offer the most optimal weather in Shimo-suwa. In contrast, January, February, March and December tend to have less optimal conditions.
What temperatures can I expect in Shimo-suwa?
Daytime highs range from 3°C (37°F) in January to 28°C (82°F) in August. Nighttime lows range from -7°C (19°F) to 18°C (64°F). Temperatures vary considerably through the year.
How much rain does Shimo-suwa get?
Annual rainfall is around 1663 mm (65 in). July is the wettest month with 203 mm (8 in), while December is the driest with 87 mm (3.4 in).
How sunny is Shimo-suwa?
Shimo-suwa receives around 2,178 hours of sunshine per year. January is the sunniest month with 204 hours, while September is the cloudiest with just 142 hours. Overall, Shimo-suwa enjoys abundant sunshine.
Shimo-suwa 3-Day Forecast
Shimo-suwa 3-Day Forecast
Shimo-suwa on the map
Shimo-suwa is highlighted — select any city to see its climate.
Popular this month
Where to go in June — average daytime high across popular destinations.
Bucket list
Need travel inspiration? Check out our bucket list articles and be inspired.
Chase the autumn leaves in Japan
Japan is one of these cases which turns into a gold, yellow and orange fairy tale starting from September. And we can honestly say: We cannot imagine a more beautiful season to visit Japan.
Walk the 88 temple circuit
We recommend walking the 88 temple circuit from April til October. Although June, July and August can be a bit wet, hot and humid.
The famous bamboo forests of Arashiyama
The famous bamboo forests of Arashiyama lie just outside the city center of Kyoto and is unique in the world. If you look at photos of this bamboo forest, it looks like you have landed in a fairy-tale world.
10 reasons why you should visit Japan in winter
Here are 10 reasons why you should plan a winter trip to Japan. During this period, popular sights are less busy and prices for flights and hotels much cheaper.