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 transition into September is accompanied by a temperature decrease, with the average high-temperature shifting from a moderately hot 81.7°F (27.6°C) in August to a pleasant 70.2°F (21.2°C). In Roanwood, an average nighttime temperature of 53.8°F (12.1°C) is expected during September.Humidity
In Roanwood, the average relative humidity in September is 47%.Rainfall
In Roanwood, in September, it is raining for 9.1 days, with typically 1.1" (28mm) of accumulated precipitation. Throughout the year, there are 90.8 rainfall days, and 11.1" (282mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall.Daylight
The average length of the day in September in Roanwood is 12h and 34min.On the first day of September in Roanwood, Montana, sunrise is at 6:23 am and sunset at 7:47 pm. On the last day of the month, sunrise is at 7:05 am and sunset at 6:46 pm MDT.
Sunshine
The average sunshine in September is 10.1h.UV index
In Roanwood, the average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: The maximum UV index, 4 during September, leads to the following recommendations:
Adopt protective measures - It is advised to guard against sun damage. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses. Bear in mind! The Sun's UV radiation can nearly double in intensity due to the reflective quality of snow.
Frequently asked questions
What is the average September temperature in Roanwood?
What is the average humidity in September in Roanwood?
How many days does it rain in September in Roanwood?
When it does not snow in Roanwood?
Does it snow in Roanwood in September?
How many hours of daylight does Roanwood have in September?
When are sunrise and sunset in September in Roanwood?
How long on average sun shines in September in Roanwood?
What is the UV index reading in September in Roanwood?
Average temperature in September
Roanwood, MT
- Average high temperature in September: 70.2°F
The warmest month (with the highest average high temperature) is July (83.1°F).
The month with the lowest average high temperature is February (23.7°F).
- Average low temperature in September: 53.8°F
The month with the highest average low temperature is July (63.3°F).
The coldest month (with the lowest average low temperature) is February (10.2°F).
Average pressure in September
Roanwood, 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
Roanwood, MT
- Average wind speed in September: 10.4mph
The windiest month (with the highest average wind speed) is April (11.7mph).
The calmest month (with the lowest average wind speed) is February (8.8mph).
Average humidity in September
Roanwood, MT
- Average humidity in September: 47%
The month with the highest relative humidity is January (86%).
The month with the lowest relative humidity is August (42%).
Average rainfall in September
Roanwood, MT
- Average rainfall in September: 1.1"
The wettest month (with the highest rainfall) is June (2.01").
The driest months (with the least rainfall) are January and February (0.35").
Average rainfall days in September
Roanwood, MT
- Average rainfall days in September: 9.1 days
The month with the highest number of rainy days is May (13.8 days).
The month with the least rainy days is February (2.3 days).
Average snowfall in September
Roanwood, MT
- Average snowfall in September: 0"
The month with the highest snowfall is December (2.6").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Roanwood, MT
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is February (9.2 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Roanwood, 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: 10h and 1min
The month with the most sunshine is July (Average sunshine: 11h and 48min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in September
Roanwood, MT
- Average sunshine days in September: 18.9 days
The month with the most sunshine days is November (21.5 days).
The month with the least sunshine days is June (13.8 days).
Average UV index in September
Roanwood, MT
- Average UV index in September: 4
The month with the highest UV index is July (UV index 7).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in September
Roanwood, MT
- Average cloud cover in September: 23
The month with the most cloud cover is February (Cloud cover 49).
The month with the least cloud cover is July (Cloud cover 16).
Average visibility in September
Roanwood, MT
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Roanwood, Montana, USA
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