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
Transition from August to September is accompanied by a temperature drop, with average high-temperatures decreasing from a warm 81.1°F (27.3°C) to a pleasant 70.3°F (21.3°C). In September, the average low-temperature records at a fresh 52.2°F (11.2°C) during the nights.Humidity
In Box Elder, the average relative humidity in September is 47%.Rainfall
In Box Elder, during September, the rain falls for 8.5 days and regularly aggregates up to 0.94" (24mm) of precipitation. Throughout the year, there are 103.8 rainfall days, and 11.26" (286mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, September through December. September is the first month it typically snows. Throughout September, in the average 0.3 snowfall days, it receives 0.63" (16mm) of snow. In Box Elder, during the entire year, snow falls for 55.7 days and aggregates up to 22.09" (561mm) of snow.Daylight
In Box Elder, Montana, the average length of the day in September is 12h and 34min.On the first day of the month, sunrise is at 6:38 am and sunset at 8:00 pm. On the last day of September, sunrise is at 7:19 am and sunset at 7:00 pm MDT.
Sunshine
In September, the average sunshine is 10h.UV index
In Box Elder, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: The daily high UV index of 4 during September translates into the following recommendations:
Take precautions - Protection against sun damage is advised. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes. Be watchful! The reflection of snow can enhance the intensity of the Sun's UV radiation nearly double.
Frequently asked questions
What are September temperatures in Box Elder?
What is the average humidity in September in Box Elder?
How much does it rain in Box Elder in September?
When does it start to snow in Box Elder?
What is the average length of the day in September in Box Elder?
What time are sunrise and sunset in September in Box Elder?
How long on average sun shines in September in Box Elder?
How high is the UV index in September in Box Elder?
Average temperature in September
Box Elder, MT
- Average high temperature in September: 70.3°F
The warmest month (with the highest average high temperature) is July (82.6°F).
The month with the lowest average high temperature is December (27.5°F).
- Average low temperature in September: 52.2°F
The month with the highest average low temperature is August (60.4°F).
The coldest month (with the lowest average low temperature) is February (14°F).
Average pressure in September
Box Elder, MT
- Average pressure in September: 29.93"Hg
The months with the highest atmospheric pressure are January and February (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed in September
Box Elder, MT
- Average wind speed in September: 8.9mph
The windiest month (with the highest average wind speed) is November (10.6mph).
The calmest month (with the lowest average wind speed) is August (8.4mph).
Average humidity in September
Box Elder, MT
- Average humidity in September: 47%
The month with the highest relative humidity is January (82%).
The month with the lowest relative humidity is August (41%).
Average rainfall in September
Box Elder, MT
- Average rainfall in September: 0.94"
The wettest month (with the highest rainfall) is June (2.13").
The driest month (with the least rainfall) is December (0.43").
Average rainfall days in September
Box Elder, MT
- Average rainfall days in September: 8.5 days
The month with the highest number of rainy days is May (14.4 days).
The month with the least rainy days is February (3.7 days).
Average snowfall in September
Box Elder, MT
- Average snowfall in September: 0.63"
The month with the highest snowfall is January (3.9").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Box Elder, MT
- Average snowfall days in September: 0.3 days
The month with the highest number of snowfall days is January (11.5 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Box Elder, 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: 10h and 0min
The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is February (Average sunshine: 5h and 18min).
Average sunshine days in September
Box Elder, MT
- Average sunshine days in September: 19.1 days
The month with the most sunshine days is November (19.3 days).
The month with the least sunshine days is April (12.2 days).
Average UV index in September
Box Elder, 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
Box Elder, MT
- Average cloud cover in September: 23
The month with the most cloud cover is February (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 16).
Average visibility in September
Box Elder, 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).
Box Elder, Montana, USA
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