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
A change in temperatures is noted in Stanley as August gives way to September, with average highs reducing from a pleasant 71.4°F (21.9°C) to a comfortable 62.1°F (16.7°C). Stanley, amidst the high September temperatures, experiences a substantial shift to an average nighttime low of 36.5°F (2.5°C).Humidity
The average relative humidity in September is 53%.Rainfall
In Stanley, in September, during 9.5 rainfall days, 1.18" (30mm) of precipitation is typically accumulated. Throughout the year, in Stanley, there are 98.2 rainfall days, and 19.25" (489mm) of precipitation is accumulated.Snowfall
Months with snowfall in Stanley are January through June, September through December. September is the first month it typically snows. Throughout September, in the average 1.5 snowfall days, it receives 1.38" (35mm) of snow. In Stanley, during the entire year, snow falls for 131.3 days and aggregates up to 100.24" (2546mm) of snow.Daylight
In September, the average length of the day is 12h and 29min.On the first day of September in Stanley, Idaho, sunrise is at 7:03 am and sunset at 8:15 pm. On the last day of the month, sunrise is at 7:37 am and sunset at 7:21 pm MDT.
Sunshine
In September, the average sunshine is 9h.UV index
In September, the average daily maximum UV index is 2. A UV Index of 2, and less, symbolizes a low health risk from unsafe exposure to UV radiation for ordinary individuals.Note: In September, the maximum UV index of 2 suggests this advice:
Babies, children, and those with sensitive skin should always avoid extended periods in the sun. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat. Take into account! The reflection from snow can nearly double the Sun's UV radiation intensity.
Frequently asked questions
What are the temperatures in Stanley in September?
What is the average humidity in September in Stanley?
How much does it rain in Stanley in September?
When does it start to snow in Stanley?
What is the average length of the day in September in Stanley?
When are sunrise and sunset in September in Stanley?
How many hours of sunshine does Stanley have in September?
What is the UV index intensity in September in Stanley?
Average temperature in September
Stanley, ID
- Average high temperature in September: 62.1°F
The warmest month (with the highest average high temperature) is July (72.7°F).
The month with the lowest average high temperature is December (23.9°F).
- Average low temperature in September: 36.5°F
The month with the highest average low temperature is July (43.3°F).
The coldest month (with the lowest average low temperature) is December (5.4°F).
Average pressure in September
Stanley, ID
- Average pressure in September: 29.96"Hg
The month with the highest atmospheric pressure is January (30.26"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Stanley, ID
- Average wind speed in September: 5mph
The windiest month (with the highest average wind speed) is July (5.8mph).
The calmest months (with the lowest average wind speed) are January and October (4.8mph).
Average humidity in September
Stanley, ID
- Average humidity in September: 53%
The months with the highest relative humidity are February and March (91%).
The month with the lowest relative humidity is July (44%).
Average rainfall in September
Stanley, ID
- Average rainfall in September: 1.18"
The wettest month (with the highest rainfall) is March (2.17").
The driest months (with the least rainfall) are July and August (0.63").
Average rainfall days in September
Stanley, ID
- Average rainfall days in September: 9.5 days
The month with the highest number of rainy days is May (16.3 days).
The month with the least rainy days is January (3.1 days).
Average snowfall in September
Stanley, ID
- Average snowfall in September: 1.38"
The month with the highest snowfall is December (16.77").
The months with the least snowfall are July and August (0").
Average snowfall days in September
Stanley, ID
- Average snowfall days in September: 1.5 days
The month with the highest number of snowfall days is March (21.6 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Stanley, ID
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in September: 9h and 0min
The month with the most sunshine is July (Average sunshine: 11h and 48min).
The months with the least sunshine are January and December (Average sunshine: 4h and 24min).
Average sunshine days in September
Stanley, ID
- Average sunshine days in September: 18.2 days
The month with the most sunshine days is July (20 days).
The month with the least sunshine days is April (8.1 days).
Average UV index in September
Stanley, ID
- Average UV index in September: 2
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, March and November (UV index 1).
Average cloud cover in September
Stanley, ID
- Average cloud cover in September: 20
The month with the most cloud cover is February (Cloud cover 65).
The month with the least cloud cover is July (Cloud cover 12).
Average visibility in September
Stanley, ID
- Average visibility in September: 6mi
The months with the highest visibility are June, July, August, September and October (6mi).
The month with the lowest visibility is February (3mi).
Stanley, Idaho, USA
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