Nagano
Japan
Long-term weather forecast
Long-term weather forecast

August weather forecast and climate
Nagano, Japan

August, the last month of the summer, in Nagano, is a tropical month, with average temperature ranging between min 21.3°C (70.3°F) and max 31°C (87.8°F).

Temperature

August is the warmest month, with an average high-temperature of 31°C (87.8°F) and an average low-temperature of 21.3°C (70.3°F).

Heat index

In August, the average heat index is estimated at a torrid 38.2°C (100.8°F). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Note that heat index values are valued for light wind and location in the shade. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature', 'real feel', 'apparent temperature', or 'feels like', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. Additional factors like differences in body mass, height, and shape, wind, pregnancy, and activity influence one's weather impression. Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
The human body normally cools itself by perspiration. Excessive warmth is eliminated from the body by evaporation of sweat. Under high air temperature and humidity (high heat index) conditions, perspiration is limited, and the perception of heat is increased. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

In August, the average relative humidity is 72%.

Rainfall

In August, the rain falls for 9.8 days. Throughout August, 97.8mm (3.9") of precipitation is accumulated. Throughout the year, in Nagano, there are 129.8 rainfall days, and 932.7mm (36.7") of precipitation is accumulated.

Snowfall

May through October are months without snowfall.

Daylight

In August, the average length of the day is 13.5h.

Sunshine

The average sunshine in August in Nagano is 6.6h.

What is the warmest month in Nagano?

With an average high-temperature of 31°C (87.8°F) and an average low-temperature of 21.3°C (70.3°F), August is the warmest month in Nagano, Japan.

What is the temperature in August in Nagano?

The average high-temperature, in August, in Nagano, is 31°C (87.8°F), while the average low-temperature is 21.3°C (70.3°F). The average heat index (a.k.a. 'apparent temperature', 'feels like'), that combines air temperature and relative humidity, in August is evaluated at 38.2°C (100.8°F).

What is the average humidity in August in Nagano?

The average relative humidity in August in Nagano is 72%.

How much does it rain in Nagano in August?

In Nagano, Japan, during August, the rain falls for 9.8 days and regularly aggregates up to 97.8mm (3.9") of precipitation.

When it does not snow in Nagano?

In Nagano snow does not fall in May through October.

What is the average length of the day in August in Nagano?

In Nagano, the average length of the day in August is 13.5h.

How many hours of sunshine does Nagano have in August?

In August, the average sunshine is 6.6h.
Average temperature in August - Nagano, Japan
  • Average high temperature in August: 31°C

The warmest month (with the highest average high temperature) is August (31°C).
The month with the lowest average high temperature is January (3.5°C).

  • Average low temperature in August: 21.3°C

The month with the highest average low temperature is August (21.3°C).
The coldest month (with the lowest average low temperature) is January (-4.1°C).

Average humidity in August - Nagano, Japan
  • Average humidity in August: 72%

The month with the highest relative humidity is January (78%).
The month with the lowest relative humidity is April (61%).

Average rainfall in August - Nagano, Japan
  • Average rainfall in August: 97.8mm

The wettest month (with the highest rainfall) is July (134.4mm).
The driest month (with the lowest rainfall) is November (44.3mm).

Average rainfall days in August - Nagano, Japan
  • Average rainfall days in August: 9.8 days

The month with the highest number of rainy days is July (13.1 days).
The month with the lowest number of rainy days is November (8.6 days).

Average snowfall in August - Nagano, Japan
  • Average snowfall in August: 0mm

The month with the highest snowfall is January (980mm).
Months with the lowest snowfall are May, June, July, August, September and October (0mm).

Average snowfall days in August - Nagano, Japan
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is January (22.9 days).
Months with the lowest number of snowfall days are May, June, July, August, September and October (0 days).

Average daylight in August / Average sunshine in August - Nagano, Japan
  • Average daylight in August: 13.5h

The month with the longest days is June (Average daylight: 14.6h).
The month with shortest days is December (Average daylight: 9.7h).

  • Average sunshine in August: 6.6h

The month with most sunshine is May (Average sunshine: 6.7h).
The month with least sunshine is January (Average sunshine: 4.1h).