Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
September brings a decrease in the average high-temperature, falling from August's moderately hot 77°F (25°C) to an enjoyable 66.2°F (19°C). A steady average of 40.1°F (4.5°C) throughout September underscores a considerable divergence from the daytime high.Humidity
The average relative humidity in September in Mullan is 63%.Rainfall
In Mullan, in September, it is raining for 8.5 days, with typically 0.75" (19mm) of accumulated precipitation. In Mullan, during the entire year, the rain falls for 88.5 days and collects up to 25.12" (638mm) of precipitation.Snowfall
Months with snowfall are January through June, September through December. September is the first month it typically snows. Throughout September, in the average 1 snowfall days, it receives 0.43" (11mm) of snow. In Mullan, during the entire year, snow falls for 133.2 days and aggregates up to 146.61" (3724mm) of snow.Daylight
In Mullan, the average length of the day in September is 12h and 32min.On the first day of the month, sunrise is at 6:03 am and sunset at 7:22 pm. On the last day of September, in Mullan, sunrise is at 6:41 am and sunset at 6:23 pm PDT.
Sunshine
In Mullan, the average sunshine in September is 8.9h.UV index
The average daily maximum UV index in September in Mullan is 3. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for ordinary individuals.Note: The maximum daily UV index of 3 in September interprets into the following recommendations:
Adopt protective measures - It is advised to guard against sun damage. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes. Foresee this! The reflection from snow can nearly double the intensity of UV radiation from the Sun.
Frequently asked questions
What is the usual temperature for Mullan in September?
What is the average humidity in September in Mullan?
How much does it rain in Mullan in September?
When does it start to snow in Mullan?
What is the average length of the day in September in Mullan?
When is the sunrise / sunset in September in Mullan?
How many hours of sunshine does Mullan have in September?
How high is the UV index in September in Mullan?
Average temperature in September
Mullan, ID
- Average high temperature in September: 66.2°F
The warmest month (with the highest average high temperature) is August (77°F).
The month with the lowest average high temperature is December (27.9°F).
- Average low temperature in September: 40.1°F
The month with the highest average low temperature is August (47.3°F).
The coldest month (with the lowest average low temperature) is December (16.9°F).
Average pressure in September
Mullan, ID
- Average pressure in September: 29.98"Hg
The month with the highest atmospheric pressure is January (30.19"Hg).
The months with the lowest atmospheric pressure are June and August (29.93"Hg).
Average wind speed in September
Mullan, ID
- Average wind speed in September: 4.1mph
The windiest month (with the highest average wind speed) is April (4.9mph).
The calmest months (with the lowest average wind speed) are August and September (4.1mph).
Average humidity in September
Mullan, ID
- Average humidity in September: 63%
The month with the highest relative humidity is January (93%).
The months with the lowest relative humidity are July and August (54%).
Average rainfall in September
Mullan, ID
- Average rainfall in September: 0.75"
The wettest month (with the highest rainfall) is January (3.58").
The driest month (with the least rainfall) is July (0.39").
Average rainfall days in September
Mullan, ID
- Average rainfall days in September: 8.5 days
The month with the highest number of rainy days is May (13.3 days).
The months with the least rainy days are January and February (2.8 days).
Average snowfall in September
Mullan, ID
- Average snowfall in September: 0.43"
The month with the highest snowfall is January (29.53").
The months with the least snowfall are July and August (0").
Average snowfall days in September
Mullan, ID
- Average snowfall days in September: 1 days
The month with the highest number of snowfall days is March (22.1 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Mullan, ID
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).
- Average sunshine in September: 8h and 5min
The month with the most sunshine is July (Average sunshine: 11h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days in September
Mullan, ID
- Average sunshine days in September: 19.7 days
The month with the most sunshine days is August (23.2 days).
The month with the least sunshine days is March (7.5 days).
Average UV index in September
Mullan, ID
- Average UV index in September: 3
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 1).
Average cloud cover in September
Mullan, ID
- Average cloud cover in September: 26
The month with the most cloud cover is February (Cloud cover 67).
The months with the least cloud cover are July and August (Cloud cover 15).
Average visibility in September
Mullan, ID
- Average visibility in September: 6mi
The months with the highest visibility are June, July, August and September (6mi).
The month with the lowest visibility is January (2mi).
Mullan, Idaho, USA
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