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
The start of September signals a decrease in the average high-temperature, transitioning from a moderately hot 82.8°F (28.2°C) in August to a pleasant 71.1°F (21.7°C). In Whitewater, September's nights observe an average temperature dip to a fresh 53.2°F (11.8°C).Humidity
The average relative humidity in September is 46%.Rainfall
In Whitewater, in September, during 8.1 rainfall days, 1.1" (28mm) of precipitation is typically accumulated. In Whitewater, during the entire year, the rain falls for 91.8 days and collects up to 10.63" (270mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
The average length of the day in September in Whitewater is 12h and 34min.On the first day of September in Whitewater, sunrise is at 6:28 am and sunset at 7:51 pm. On the last day of the month, sunrise is at 7:09 am and sunset at 6:50 pm MDT.
Sunshine
In September, the average sunshine is 9.8h.UV index
In September, the average daily maximum UV index in Whitewater is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for average individuals.Note: In September, the UV index of 4 transforms into the following advice:
Take heed. Individuals of lighter complexion can be burned in less than half an hour. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes. Be informed! The Sun's UV radiation can be nearly doubled due to the reflection from snow.
Frequently asked questions
What is the temperature in September in Whitewater?
What is the average humidity in September in Whitewater?
How much does it rain in Whitewater in September?
When it does not snow in Whitewater?
Does it snow in Whitewater in September?
What is the average length of the day in September in Whitewater?
When are sunrise and sunset in September in Whitewater?
How long on average sun shines in September in Whitewater?
What is the UV index reading in September in Whitewater?
Average temperature in September
Whitewater, MT
- Average high temperature in September: 71.1°F
The warmest month (with the highest average high temperature) is July (84°F).
The month with the lowest average high temperature is February (24.4°F).
- Average low temperature in September: 53.2°F
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is February (10°F).
Average pressure in September
Whitewater, MT
- Average pressure in September: 29.92"Hg
The month with the highest atmospheric pressure is February (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.83"Hg).
Average wind speed in September
Whitewater, MT
- Average wind speed in September: 10mph
The windiest month (with the highest average wind speed) is April (11.3mph).
The calmest month (with the lowest average wind speed) is February (8.3mph).
Average humidity in September
Whitewater, MT
- Average humidity in September: 46%
The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is August (41%).
Average rainfall in September
Whitewater, MT
- Average rainfall in September: 1.1"
The wettest month (with the highest rainfall) is May (1.73").
The driest month (with the least rainfall) is February (0.43").
Average rainfall days in September
Whitewater, MT
- Average rainfall days in September: 8.1 days
The month with the highest number of rainy days is May (12.7 days).
The month with the least rainy days is February (3.3 days).
Average snowfall in September
Whitewater, MT
- Average snowfall in September: 0"
The month with the highest snowfall is December (3.43").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Whitewater, MT
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is January (12.3 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Whitewater, MT
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 16h and 6min).
The month with the shortest days is December (Average daylight: 8h and 18min).
- Average sunshine in September: 9h and 5min
The month with the most sunshine is July (Average sunshine: 11h and 42min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).
Average sunshine days in September
Whitewater, MT
- Average sunshine days in September: 20.6 days
The month with the most sunshine days is October (21 days).
The month with the least sunshine days is April (15.4 days).
Average UV index in September
Whitewater, MT
- Average UV index in September: 4
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).
Average cloud cover in September
Whitewater, MT
- Average cloud cover in September: 26
The month with the most cloud cover is February (Cloud cover 50).
The months with the least cloud cover are July and August (Cloud cover 18).
Average visibility in September
Whitewater, MT
- Average visibility in September: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
Whitewater, Montana, USA
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