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

September weather forecast and climate
Nagano, Japan

September, the first month of the autumn, in Nagano, is also a moderately hot month, with temperature in the range of an average low of 16.9°C (62.4°F) and an average high of 25.6°C (78.1°F).

Temperature

In September, the average high-temperature decreases, from a tropical 31°C (87.8°F) in August, to a moderately hot 25.6°C (78.1°F). In Nagano, the average low-temperature is 16.9°C (62.4°F).

Humidity

The average relative humidity in Nagano is 74%.

Rainfall

In Nagano, during 11.7 rainfall days, 129.4mm (5.1") of precipitation is typically accumulated. In Nagano, during the entire year, the rain falls for 129.8 days and collects up to 932.7mm (36.7") of precipitation.

Snowfall

In Nagano, Japan, snow does not fall in May through October.

Daylight

The average length of the day is 12.4h.

Sunshine

In Nagano, the average sunshine in September is 4.7h.

What is the temperature in September in Nagano?

In September, in Nagano, Japan, the average high-temperature is 25.6°C (78.1°F), and the average low-temperature is 16.9°C (62.4°F).

What is the average humidity in September in Nagano?

In September, the average relative humidity is 74%.

How much does it rain in Nagano in September?

In September, in Nagano, the rain falls for 11.7 days. Throughout September, 129.4mm (5.1") of precipitation is accumulated.

When it does not snow in Nagano?

May through October are months without snowfall.

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

The average length of the day in September is 12.4h.

How many hours of sunshine does Nagano have in September?

In September, the average sunshine is 4.7h.
Average temperature in September - Nagano, Japan
  • Average high temperature in September: 25.6°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 September: 16.9°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 September - Nagano, Japan
  • Average humidity in September: 74%

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

Average rainfall in September - Nagano, Japan
  • Average rainfall in September: 129.4mm

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 September - Nagano, Japan
  • Average rainfall days in September: 11.7 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 September - Nagano, Japan
  • Average snowfall in September: 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 September - Nagano, Japan
  • Average snowfall days in September: 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 September / Average sunshine in September - Nagano, Japan
  • Average daylight in September: 12.4h

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 September: 4.7h

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