September weather forecastDunkirk, MT
September
Weather in September
The first month of the autumn, September, is still a pleasant month in Dunkirk, Montana, with temperature in the range of an average high of 68.9°F (20.5°C) and an average low of 50.7°F (10.4°C).Temperature
With the beginning of September, the average high-temperature shows a decrease, transitioning from a moderately hot 79.9°F (26.6°C) in August to a pleasant 68.9°F (20.5°C). In September, the nighttime temperature lowers to an average of 50.7°F (10.4°C).Humidity
In September, the average relative humidity is 46%.Rainfall
In September, in Dunkirk, Montana, the rain falls for 6.5 days. Throughout September, 0.59" (15mm) of precipitation is accumulated. Throughout the year, there are 84.2 rainfall days, and 9.29" (236mm) of precipitation is accumulated.Snowfall
January through May, September through December are months with snowfall in Dunkirk. September is the first month it typically snows. Throughout September, in the average 0.9 snowfall days, it receives 0.63" (16mm) of snow. Throughout the year, there are 53.7 snowfall days, and 20.47" (520mm) of snow is accumulated.Daylight
The average length of the day in September in Dunkirk is 12h and 34min.On the first day of September in Dunkirk, sunrise is at 6:45 am and sunset at 8:07 pm. On the last day of the month, sunrise is at 7:25 am and sunset at 7:06 pm MDT.
Sunshine
In September, the average sunshine is 9.7h.UV index
The average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for ordinary individuals.Note: In September, an average UV index of 4 transforms into the following instructions:
Exercise prevention - Protecting skin and eyes from harm is required. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades. Consider this! The reflection from snow can almost double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Dunkirk, MT
- Average high temperature in September: 68.9°F
The warmest month (with the highest average high temperature) is July (80.8°F).
The month with the lowest average high temperature is December (27.7°F).
- Average low temperature in September: 50.7°F
The month with the highest average low temperature is August (58.3°F).
The coldest month (with the lowest average low temperature) is December (15.4°F).
Average pressure in September
Dunkirk, MT
- Average pressure in September: 29.94"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).
Average wind speed in September
Dunkirk, MT
- Average wind speed in September: 9.4mph
The windiest month (with the highest average wind speed) is April (11mph).
The calmest month (with the lowest average wind speed) is August (8.7mph).
Average humidity in September
Dunkirk, MT
- Average humidity in September: 46%
The month with the highest relative humidity is January (80%).
The month with the lowest relative humidity is August (40%).
Average rainfall in September
Dunkirk, MT
- Average rainfall in September: 0.59"
The wettest month (with the highest rainfall) is June (2.01").
The driest months (with the least rainfall) are January and December (0.39").
Average rainfall days in September
Dunkirk, MT
- Average rainfall days in September: 6.5 days
The month with the highest number of rainy days is May (13.9 days).
The month with the least rainy days is February (3.1 days).
Average snowfall in September
Dunkirk, MT
- Average snowfall in September: 0.63"
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
Dunkirk, MT
- Average snowfall days in September: 0.9 days
The month with the highest number of snowfall days is February (10.3 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Dunkirk, MT
- Average daylight in September: 12h and 36min
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 24min).
- Average sunshine in September: 9h and 42min
The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 5h and 24min).
Average sunshine days in September
Dunkirk, MT
- Average sunshine days in September: 22.2 days
The month with the most sunshine days is September (22.2 days).
The month with the least sunshine days is April (14.7 days).
Average UV index in September
Dunkirk, 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
Dunkirk, MT
- Average cloud cover in September: 23
The month with the most cloud cover is February (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 15).
Average visibility in September
Dunkirk, 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).
