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 shift from August to September involves a decrease in the average high-temperature, dropping from a moderately hot 79°F (26.1°C) to a pleasant 68.2°F (20.1°C). During the month of September, the temperature falls to an average of 48.6°F (9.2°C).Humidity
In Dupuyer, the average relative humidity in September is 48%.Rainfall
In Dupuyer, in September, during 6.1 rainfall days, 0.79" (20mm) of precipitation is typically accumulated. Throughout the year, there are 73.3 rainfall days, and 9.17" (233mm) of precipitation is accumulated.Snowfall
January through May, September through December are months with snowfall in Dupuyer. September is the first month it typically snows in Dupuyer, Montana. Throughout September, in the average 0.7 snowfall days, it receives 0.55" (14mm) of snow. Throughout the year, there are 50.3 snowfall days, and 21.26" (540mm) of snow is accumulated.Daylight
In Dupuyer, the average length of the day in September is 12h and 34min.On the first day of the month, sunrise is at 6:48 am and sunset at 8:10 pm. On the last day of September, sunrise is at 7:29 am and sunset at 7:10 pm MDT.
Sunshine
In September, the average sunshine in Dupuyer, Montana, is 9.7h.UV index
The average daily maximum UV index in September in Dupuyer is 4. A UV Index of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for the ordinary person.Note: A maximum UV index of 4 in September translates into the following recommendations:
Make use of precautions - Shielding skin and eyes from injury is a requirement. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat. Remember! The Sun's UV radiation can be magnified almost twofold by the reflection of snow.
Frequently asked questions
What is the temperature in September in Dupuyer?
What is the average humidity in September in Dupuyer?
How much does it rain in Dupuyer in September?
When does it start snowing in Dupuyer?
What is the average length of the day in September in Dupuyer?
What time are sunrise and sunset in September in Dupuyer?
How many hours of sunshine does Dupuyer have in September?
How high is the UV index in September in Dupuyer?
Average temperature in September
Dupuyer, MT
- Average high temperature in September: 68.2°F
The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is December (28.8°F).
- Average low temperature in September: 48.6°F
The month with the highest average low temperature is August (55.9°F).
The coldest month (with the lowest average low temperature) is December (16.2°F).
Average pressure in September
Dupuyer, MT
- Average pressure in September: 29.96"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in September
Dupuyer, MT
- Average wind speed in September: 8.8mph
The windiest month (with the highest average wind speed) is January (11.2mph).
The calmest months (with the lowest average wind speed) are July and August (8mph).
Average humidity in September
Dupuyer, MT
- Average humidity in September: 48%
The month with the highest relative humidity is January (76%).
The month with the lowest relative humidity is August (42%).
Average rainfall in September
Dupuyer, MT
- Average rainfall in September: 0.79"
The wettest month (with the highest rainfall) is June (1.93").
The driest month (with the least rainfall) is December (0.35").
Average rainfall days in September
Dupuyer, MT
- Average rainfall days in September: 6.1 days
The month with the highest number of rainy days is May (11.3 days).
The month with the least rainy days is November (2.7 days).
Average snowfall in September
Dupuyer, MT
- Average snowfall in September: 0.55"
The month with the highest snowfall is February (4.17").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Dupuyer, MT
- Average snowfall days in September: 0.7 days
The month with the highest number of snowfall days is February (11.3 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Dupuyer, MT
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 16h and 0min).
The month with the shortest days is December (Average daylight: 8h and 24min).
- Average sunshine in September: 9h and 4min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 48min).
Average sunshine days in September
Dupuyer, MT
- Average sunshine days in September: 21 days
The month with the most sunshine days is October (23.2 days).
The month with the least sunshine days is February (15.8 days).
Average UV index in September
Dupuyer, MT
- Average UV index in September: 4
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).
Average cloud cover in September
Dupuyer, MT
- Average cloud cover in September: 22
The month with the most cloud cover is February (Cloud cover 41).
The month with the least cloud cover is July (Cloud cover 14).
Average visibility in September
Dupuyer, 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).
Dupuyer, Montana, USA
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