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 involves a temperature drop, moving from a moderately hot 81.5°F (27.5°C) in August to a pleasant 70.7°F (21.5°C). The nights of September anticipate an average low-temperature of 50.9°F (10.5°C).Humidity
The average relative humidity in September is 46%.Rainfall
In September, the rain falls for 6 days. Throughout September, 0.67" (17mm) of precipitation is accumulated. Throughout the year, in Sand Coulee, Montana, there are 85.3 rainfall days, and 9.84" (250mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, September through December. September is the first month it typically snows in Sand Coulee. Throughout September, in the average 0.3 snowfall days, it receives 1.26" (32mm) of snow. In Sand Coulee, Montana, during the entire year, snow falls for 58.9 days and aggregates up to 28.54" (725mm) of snow.Daylight
In Sand Coulee, Montana, the average length of the day in September is 12h and 32min.On the first day of the month, sunrise is at 6:44 am and sunset at 8:04 pm. On the last day of September, in Sand Coulee, Montana, sunrise is at 7:23 am and sunset at 7:05 pm MDT.
Sunshine
In September, the average sunshine in Sand Coulee is 9.8h.UV index
In September, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: In September, the maximum UV index of 4 suggests this advice:
Exercise caution. Those with pale skin may experience burns in less than half an hour. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.
Frequently asked questions
What are the temperatures in Sand Coulee in September?
What is the average humidity in September in Sand Coulee?
How much does it rain in Sand Coulee in September?
When does it start to snow in Sand Coulee?
What is the average length of the day in September in Sand Coulee?
When are sunrise and sunset in September in Sand Coulee?
How many hours of sunshine does Sand Coulee have in September?
How high is the UV index in September in Sand Coulee?
Average temperature in September
Sand Coulee, MT
- Average high temperature in September: 70.7°F
The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is December (30°F).
- Average low temperature in September: 50.9°F
The month with the highest average low temperature is August (58.5°F).
The coldest month (with the lowest average low temperature) is February (18.3°F).
Average pressure in September
Sand Coulee, MT
- Average pressure in September: 29.95"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in September
Sand Coulee, MT
- Average wind speed in September: 8.8mph
The windiest months (with the highest average wind speed) are January and November (11.4mph).
The calmest month (with the lowest average wind speed) is August (7.8mph).
Average humidity in September
Sand Coulee, MT
- Average humidity in September: 46%
The month with the highest relative humidity is January (77%).
The month with the lowest relative humidity is August (40%).
Average rainfall in September
Sand Coulee, MT
- Average rainfall in September: 0.67"
The wettest month (with the highest rainfall) is June (1.57").
The driest month (with the least rainfall) is July (0.47").
Average rainfall days in September
Sand Coulee, MT
- Average rainfall days in September: 6 days
The month with the highest number of rainy days is May (11.7 days).
The months with the least rainy days are November and December (4 days).
Average snowfall in September
Sand Coulee, MT
- Average snowfall in September: 1.26"
The month with the highest snowfall is February (5.67").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Sand Coulee, MT
- Average snowfall days in September: 0.3 days
The month with the highest number of snowfall days is February (12.9 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Sand Coulee, MT
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).
- Average sunshine in September: 9h and 5min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The months with the least sunshine are January, February and December (Average sunshine: 5h and 36min).
Average sunshine days in September
Sand Coulee, MT
- Average sunshine days in September: 23.1 days
The month with the most sunshine days is July (24.2 days).
The month with the least sunshine days is February (12.4 days).
Average UV index in September
Sand Coulee, 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
Sand Coulee, MT
- Average cloud cover in September: 22
The month with the most cloud cover is February (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 13).
Average visibility in September
Sand Coulee, 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).
Sand Coulee, Montana, USA
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