Nagano Prefecture

Nagano Prefecture Weather in August

Average temperatures, rainfall, sunshine and the best places to visit in Nagano Prefecture, Japan in August.

Thinking about venturing to Nagano Prefecture, Japan this August and curious about the weather conditions to expect? This page holds all the key information you seek, responding to your question:

What to Expect in Nagano Prefecture in August

Nagano Prefecture, Japan is a region in Japan. August in Nagano Prefecture generally has warm temperatures, with precipitation levels ranging from high to heavy. The month of August is in the summer season.

Temperatures

The average maximum temperatures are warm and range from 26°C (79°F) in Omachi to 29°C (84°F) in Ueda. Nighttime temperatures generally drop to 19°C (66°F) in Ueda and 17°C (63°F) in Omachi. In Nagano Prefecture, Japan, August typically stands out as the hottest month of the year. If you're planning a visit during this time, it would be wise to come prepared. Packing light and breathable summer cloths will ensure you stay comfortable throughout your stay.

To explore the conditions in Nagano Prefecture, Japan in more detail, check the map below.

Precipitation

In August, precipitation varies across different areas. From high rainfall in Tateshina with an average of 119 mm (4.7 in) to heavy rainfall in Otari with 291 mm (11 in).

Average sunshine

Sunshine amounts are decent in most places. Hakuba gets approximately 166 hours of sunlight in August, offering a reasonable amount of both bright and cloudy periods. Curious about sunnier destinations? Our weather planner makes it easy to find places worldwide with pleasant weather.

Explore Nagano Prefecture by month

Pick a month to see the average temperature, rainfall and sunshine in Nagano Prefecture — and find the best time to visit. (based on Hakuba)

Best Places to Visit in Nagano Prefecture in August

Click on a destination dot for more details. Toggle the map to compare temperatures or precipitation across Nagano Prefecture.

perfect weather
pleasant
tolerable
unpleasant
poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

Popular Destinations in Nagano Prefecture

What is the weather like in August for some of the most popular destinations in Nagano Prefecture, Japan?

Temperature range in Nagano Prefecture (August)

Precipitation variation in Nagano Prefecture (August)

Hakuba

In August Hakuba generally has high temperatures with maximum daytime temperatures around 27°C (81°F), minimum nighttime temperatures around 19°C (66°F) and heavy monthly rainfall. So on average the conditions are poor that month.

July
August
September
Max temperature
26°C (79°F)
27°C (81°F)
23°C (73°F)
Min temperature
18°C (64°F)
19°C (66°F)
15°C (59°F)
Monthly sun hours
135 hours
166 hours
115 hours
Monthly rainfall
400 mm (16 in)
289 mm (11 in)
306 mm (12 in)
Monthly rainy days
22 days
20 days
20 days
Weather conditions

Yamanouchi

In August Yamanouchi generally has high temperatures with maximum daytime temperatures around 28°C (82°F), minimum nighttime temperatures around 19°C (66°F) and heavy monthly rainfall. So on average the conditions are tolerable that month.

July
August
September
Max temperature
27°C (81°F)
28°C (82°F)
24°C (75°F)
Min temperature
18°C (64°F)
19°C (66°F)
15°C (59°F)
Monthly sun hours
170 hours
206 hours
142 hours
Monthly rainfall
246 mm (9.7 in)
186 mm (7.3 in)
192 mm (7.6 in)
Monthly rainy days
23 days
21 days
21 days
Weather conditions

Matsumoto

In August Matsumoto generally has high temperatures with maximum daytime temperatures around 28°C (82°F), minimum nighttime temperatures around 18°C (64°F) and heavy monthly rainfall. So on average the conditions are pleasant that month.

July
August
September
Max temperature
27°C (81°F)
28°C (82°F)
24°C (75°F)
Min temperature
18°C (64°F)
18°C (64°F)
14°C (57°F)
Monthly sun hours
170 hours
206 hours
142 hours
Monthly rainfall
260 mm (10 in)
170 mm (6.7 in)
220 mm (8.7 in)
Monthly rainy days
22 days
19 days
19 days
Weather conditions

Nozawa Onsen

In August Nozawa Onsen generally has high temperatures with maximum daytime temperatures around 29°C (84°F), minimum nighttime temperatures around 20°C (68°F) and heavy monthly rainfall. So on average the conditions are unpleasant that month.

July
August
September
Max temperature
28°C (82°F)
29°C (84°F)
25°C (77°F)
Min temperature
19°C (66°F)
20°C (68°F)
16°C (61°F)
Monthly sun hours
154 hours
197 hours
128 hours
Monthly rainfall
263 mm (10 in)
203 mm (8 in)
212 mm (8.3 in)
Monthly rainy days
22 days
19 days
20 days
Weather conditions

Karuizawa

In August Karuizawa generally has high temperatures with maximum daytime temperatures around 28°C (82°F), minimum nighttime temperatures around 19°C (66°F) and heavy monthly rainfall. So on average the conditions are unpleasant that month.

July
August
September
Max temperature
27°C (81°F)
28°C (82°F)
24°C (75°F)
Min temperature
19°C (66°F)
19°C (66°F)
15°C (59°F)
Monthly sun hours
170 hours
206 hours
142 hours
Monthly rainfall
255 mm (10 in)
211 mm (8.3 in)
224 mm (8.8 in)
Monthly rainy days
23 days
20 days
20 days
Weather conditions

Is your destination not in the list? Have a look at all destinations in Nagano Prefecture, in Japan.

Popular cities in August

Day & night temperatures, rainfall and average weather in Nagano Prefecture in August.

City Weather Day temp Night temp Rainfall
Hakuba 27°C (81°F) 19°C (66°F) 289 mm (11 in)
Yamanouchi 28°C (82°F) 19°C (66°F) 186 mm (7.3 in)
Matsumoto 28°C (82°F) 18°C (64°F) 170 mm (6.7 in)
Nozawa Onsen 29°C (84°F) 20°C (68°F) 203 mm (8 in)
Karuizawa 28°C (82°F) 19°C (66°F) 211 mm (8.3 in)
Otari 27°C (81°F) 19°C (66°F) 291 mm (11 in)

Nagano Prefecture weather in August: frequently asked questions

What is the weather like in Nagano Prefecture, Japan in August?

In August, Nagano Prefecture, Japan generally has poor weather conditions. Hakuba sees daytime temperatures near 27°C (81°F), with nights cooling to roughly 19°C (66°F).

What is the average temperature in Nagano Prefecture, Japan in August?

Daytime temperatures in Hakuba peak at roughly 27°C (81°F) in August, dropping to about 19°C (66°F) overnight.

Does Nagano Prefecture, Japan get a lot of rain in August?

Yes. August brings heavy rainfall to Nagano Prefecture, Japan, with Hakuba averaging around 289 mm (11 in). Expect frequent showers and pack accordingly.

Is August a Good Time to Visit Nagano Prefecture, Japan?

Given the typically poor weather conditions in Hakuba, August may not be the ideal time to visit Nagano Prefecture, Japan.

Generally speaking, provide poor weather in Hakuba.

Interested in more climate information?

We have much more information about the climate in Nagano Prefecture.

Weather and climate has detailed information for every country in the world. Are you going to Japan? Get detailed historical weather averages for many cities in Japan.

Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.

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