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

September weather forecast and climate
Dubois, ID

The first month of the autumn, September, is also an agreeable month in Dubois, Idaho, with average temperature fluctuating between 72.5°F (22.5°C) and 47.1°F (8.4°C).

Temperature

In Dubois, the average high-temperature in September drops, from a moderately hot 82.9°F (28.3°C) in August, to an agreeable 72.5°F (22.5°C). The average low-temperature, in September, is 47.1°F (8.4°C).

Humidity

In September, the average relative humidity is 44%.

Rainfall

In September, in Dubois, the rain falls for 7.1 days. Throughout September, 0.87" (22mm) of precipitation is accumulated. Throughout the year, in Dubois, there are 97.5 rainfall days, and 11.85" (301mm) of precipitation is accumulated.

Snowfall

January through May, September through December are months with snowfall in Dubois. September is the first month it typically snows in Dubois. Throughout September, in the average 0.2 snowfall days, it receives 0.04" (1mm) of snow. Throughout the year, there are 83.8 snowfall days, and 41.93" (1065mm) of snow is accumulated.

Daylight

In September, the average length of the day in Dubois is 12.5h.

Sunshine

In Dubois, the average sunshine is 10h.

UV index

In September, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from the exposure to the Sun's UV rays for average individuals.
Note: The daily maximum UV index of 4 interpret into the following advice:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.

What is the temperature in September in Dubois?

In Dubois, in September, the average high-temperature is 72.5°F (22.5°C), and the average low-temperature is 47.1°F (8.4°C).

What is the average humidity in September in Dubois?

The average relative humidity in September in Dubois, Idaho, is 44%.

How many days does it rain in September in Dubois?

In Dubois, Idaho, in September, during 7.1 rainfall days, 0.87" (22mm) of precipitation is typically accumulated.

When does it start to snow in Dubois?

September is the first month it typically snows in Dubois. Throughout September, in the average 0.2 snowfall days, it receives 0.04" (1mm) of snow.

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

The average length of the day in September in Dubois is 12.5h.

How long on average sun shines in September in Dubois?

In Dubois, Idaho, the average sunshine in September is 10h.

What is the UV index intensity in September in Dubois?

In Dubois, Idaho, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from the exposure to the Sun's UV rays.
Average temperature in September - Dubois, ID
  • Average high temperature in September: 22.5°C

The warmest month (with the highest average high temperature) is July (28.7°C).
The month with the lowest average high temperature is December (-3.2°C).

  • Average low temperature in September: 8.4°C

The month with the highest average low temperature is August (11.4°C).
The coldest month (with the lowest average low temperature) is January (-10.9°C).

Average humidity in September - Dubois, ID
  • Average humidity in September: 44%

The month with the highest relative humidity is January (91%).
The month with the lowest relative humidity is August (39%).

Average rainfall in September - Dubois, ID
  • Average rainfall in September: 22mm

The wettest month (with the highest rainfall) is January (38mm).
The driest month (with the lowest rainfall) is July (7mm).

Average rainfall days in September - Dubois, ID
  • Average rainfall days in September: 7.1 days

The month with the highest number of rainy days is April (13 days).
The month with the lowest number of rainy days is July (5 days).

Average snowfall in September - Dubois, ID
  • Average snowfall in September: 1mm

The month with the highest snowfall is January (304mm).
Months with the lowest snowfall are June, July and August (0mm).

Average snowfall days in September - Dubois, ID
  • Average snowfall days in September: 0.2 days

The month with the highest number of snowfall days is January (18.1 days).
Months with the lowest number of snowfall days are July and August (0 days).

Average daylight in September / Average sunshine in September - Dubois, ID
  • Average daylight in September: 12.5h

The month with the longest days is June (Average daylight: 15.5h).
The month with shortest days is December (Average daylight: 8.9h).

  • Average sunshine in September: 10h

The month with most sunshine is July (Average sunshine: 12.1h).
The month with least sunshine is January (Average sunshine: 4.3h).

Average UV index in September - Dubois, ID
  • Average UV index in September: 4

The month with the highest UV index is July (UV index 6).
Months with the lowest UV index are January, February, November and December (UV index 1).