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 onset of September results in a decrease in the average high-temperature, receding from a warm 75.7°F (24.3°C) in August to a refreshing 65.5°F (18.6°C). Nighttime temperatures exhibit a substantial dip from daytime highs during September, averaging at a frosty 43.7°F (6.5°C).Humidity
In September, the average relative humidity is 53%.Rainfall
In Twodot, in September, it is raining for 5 days, with typically 0.59" (15mm) of accumulated precipitation. Throughout the year, there are 80 rainfall days, and 8.78" (223mm) of precipitation is accumulated.Snowfall
Months with snowfall in Twodot are January through June, September through December. September is the first month it typically snows. Throughout September, in the average 0.6 snowfall days, it receives 1.02" (26mm) of snow. Throughout the year, there are 56.9 snowfall days, and 25.55" (649mm) of snow is accumulated.Daylight
In September, the average length of the day is 12h and 32min.On the first day of the month, sunrise is at 6:41 am and sunset at 7:58 pm. On the last day of September, in Twodot, sunrise is at 7:18 am and sunset at 7:01 pm MDT.
Sunshine
The average sunshine in September in Twodot is 10.4h.UV index
In Twodot, the average daily maximum UV index in September is 3. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for the average person.Note: The daily high UV index of 3 in September translates into this advice:
Exercise caution. The susceptibility of light skin individuals to burns is less than 30 minutes. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. Opt for tightly woven and loose clothing to enhance protection from the Sun. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature in Twodot?
What is the average humidity in September in Twodot?
How many days does it rain in September in Twodot?
When does it start to snow in Twodot?
How many hours of daylight does Twodot have in September?
What time are sunrise and sunset in September in Twodot?
How long on average sun shines in September in Twodot?
How high is the UV index in September in Twodot?
Average temperature in September
Twodot, MT
- Average high temperature in September: 65.5°F
The warmest month (with the highest average high temperature) is July (77°F).
The month with the lowest average high temperature is December (26.6°F).
- Average low temperature in September: 43.7°F
The month with the highest average low temperature is August (50.2°F).
The coldest month (with the lowest average low temperature) is February (14°F).
Average pressure in September
Twodot, MT
- Average pressure in September: 29.96"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in September
Twodot, MT
- Average wind speed in September: 7mph
The windiest month (with the highest average wind speed) is January (10.1mph).
The calmest months (with the lowest average wind speed) are July and August (6.2mph).
Average humidity in September
Twodot, MT
- Average humidity in September: 53%
The month with the highest relative humidity is January (83%).
The month with the lowest relative humidity is August (49%).
Average rainfall in September
Twodot, MT
- Average rainfall in September: 0.59"
The wettest month (with the highest rainfall) is May (1.61").
The driest month (with the least rainfall) is December (0.24").
Average rainfall days in September
Twodot, MT
- Average rainfall days in September: 5 days
The month with the highest number of rainy days is May (12 days).
The month with the least rainy days is January (3.2 days).
Average snowfall in September
Twodot, MT
- Average snowfall in September: 1.02"
The month with the highest snowfall is February (5.59").
The months with the least snowfall are July and August (0").
Average snowfall days in September
Twodot, MT
- Average snowfall days in September: 0.6 days
The month with the highest number of snowfall days is February (12.5 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Twodot, MT
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in September: 10h and 2min
The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is February (Average sunshine: 6h and 18min).
Average sunshine days in September
Twodot, MT
- Average sunshine days in September: 23.8 days
The months with the most sunshine days are August and September (23.8 days).
The month with the least sunshine days is February (14.8 days).
Average UV index in September
Twodot, MT
- 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, March, April, October, November and December (UV index 2).
Average cloud cover in September
Twodot, MT
- Average cloud cover in September: 20
The month with the most cloud cover is February (Cloud cover 42).
The months with the least cloud cover are July and August (Cloud cover 15).
Average visibility in September
Twodot, MT
- Average visibility in September: 6mi
The months with the highest visibility are January, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is February (5mi).
Twodot, Montana, USA
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