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 arrival of September corresponds with a shift in temperature, down from a pleasant 72°F (22.2°C) in August to an enjoyable 61°F (16.1°C). Nighttime temperatures exhibit a substantial dip from daytime highs during September, averaging at an icy 37.8°F (3.2°C).Humidity
In September, the average relative humidity is 64%.Rainfall
In East Glacier Park, in September, during 8.8 rainfall days, 0.87" (22mm) of precipitation is typically accumulated. In East Glacier Park, during the entire year, the rain falls for 118.6 days and collects up to 20.75" (527mm) of precipitation.Snowfall
January through June, September through December are months with snowfall. September is the first month it typically snows. Throughout September, in the average 1.2 snowfall days, it receives 1.02" (26mm) of snow. In East Glacier Park, during the entire year, snow falls for 128.7 days and aggregates up to 92.13" (2340mm) of snow.Daylight
In September, the average length of the day is 12h and 34min.On the first day of September, sunrise is at 6:51 am and sunset at 8:13 pm. On the last day of the month, sunrise is at 7:32 am and sunset at 7:13 pm MDT.
Sunshine
The average sunshine in September is 9.3h.UV index
In September, the average daily maximum UV index is 3. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for the average person.Note: The daily maximum UV index of 3 in September interprets into the following advice:
Undertake precautions - Guarding against sun damage is counselled. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage. Remember to consider! The UV radiation from the Sun can be intensified nearly twice by the reflection of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature?
What is the average humidity in September?
How much does it rain in September?
When does it start snowing?
What is the average length of the day in September?
What time are sunrise and sunset in September?
How many hours of sunshine does East Glacier Park have in September?
How high is the UV index in September?
Average temperature in September
East Glacier Park, MT
- Average high temperature in September: 61°F
The warmest month (with the highest average high temperature) is July (73°F).
The month with the lowest average high temperature is December (23.2°F).
- Average low temperature in September: 37.8°F
The months with the highest average low temperature are July and August (44.2°F).
The coldest month (with the lowest average low temperature) is February (10.9°F).
Average pressure in September
East Glacier Park, MT
- Average pressure in September: 29.97"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in September
East Glacier Park, MT
- Average wind speed in September: 5.7mph
The windiest month (with the highest average wind speed) is November (7mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).
Average humidity in September
East Glacier Park, MT
- Average humidity in September: 64%
The month with the highest relative humidity is January (93%).
The month with the lowest relative humidity is August (56%).
Average rainfall in September
East Glacier Park, MT
- Average rainfall in September: 0.87"
The wettest month (with the highest rainfall) is January (2.56").
The driest month (with the least rainfall) is August (0.71").
Average rainfall days in September
East Glacier Park, MT
- Average rainfall days in September: 8.8 days
The month with the highest number of rainy days is May (16.3 days).
The month with the least rainy days is February (4.3 days).
Average snowfall in September
East Glacier Park, MT
- Average snowfall in September: 1.02"
The month with the highest snowfall is January (20.16").
The months with the least snowfall are July and August (0").
Average snowfall days in September
East Glacier Park, MT
- Average snowfall days in September: 1.2 days
The month with the highest number of snowfall days is December (22.8 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
East Glacier Park, 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 2min
The month with the most sunshine is July (Average sunshine: 11h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 6min).
Average sunshine days in September
East Glacier Park, MT
- Average sunshine days in September: 18.4 days
The month with the most sunshine days is August (19.6 days).
The month with the least sunshine days is February (7.2 days).
Average UV index in September
East Glacier Park, 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, November and December (UV index 1).
Average cloud cover in September
East Glacier Park, MT
- Average cloud cover in September: 27
The month with the most cloud cover is January (Cloud cover 71).
The months with the least cloud cover are July and August (Cloud cover 17).
Average visibility in September
East Glacier Park, MT
- Average visibility in September: 6mi
The months with the highest visibility are May, June, July, August, September and October (6mi).
The months with the lowest visibility are January, February, March and December (4mi).
East Glacier Park, Montana, USA
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