Winchester
Idaho, USA
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Winchester, ID

September, the first month of the autumn, in W"ter, is also an agreeable month, with average temperature ranging between min 40.6°F (4.8°C) and max 68.9°F (20.5°C).

Temperature

In September, the average high-temperature decreases, from a warm 78.1°F (25.6°C) in August, to a pleasant 68.9°F (20.5°C). In W"ter, in September, the average low-temperature is 40.6°F (4.8°C).

Rainfall

Throughout September, 1.3" (32.5mm) of precipitation is accumulated. Throughout the year, in W"ter, 22.5" (571.9mm) of rain is accumulated.

Snowfall

Months with snowfall in W"ter are January through June, September through December.

Daylight

In W"ter, the average length of the day in September is 12.5h.

What is the temperature in September in W"ter?

The average high-temperature, in September, in W"ter, is 68.9°F (20.5°C), while the average low-temperature is 40.6°F (4.8°C).

How much does it rain in W"ter in September?

Throughout September, in W"ter, Idaho, 1.3" (32.5mm) of precipitation is accumulated.

When does it start snowing in W"ter?

September is the first month it typically snows in W"ter. Throughout September, W"ter receives 0.1" (2.5mm) of snow.

What is the average length of the day in September in W"ter?

In September, the average length of the day in W"ter, Idaho, is 12.5h.
Average temperature in September - Winchester, ID
  • Average high temperature in September: 68.9°F

The warmest month (with the highest average high temperature) is August (78°F).
The month with the lowest average high temperature is December (34.7°F).

  • Average low temperature in September: 40.7°F

The month with the highest average low temperature is July (47.5°F).
The coldest month (with the lowest average low temperature) is December (20.6°F).

Average rainfall in September - Winchester, ID
  • Average rainfall in September: 1.3"

The wettest month (with the highest rainfall) is May (3").
The driest month (with the lowest rainfall) is August (1").

Average snowfall in September - Winchester, ID
  • Average snowfall in September: 0.1"

The month with the highest snowfall is January (17").
Months with the lowest snowfall are July and August (0").

Average daylight in September - Winchester, ID
  • Average daylight in September: 12.5h

The month with the longest days is June (Average daylight: 15.7h).
The month with shortest days is December (Average daylight: 8.7h).