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
During the shift to September, a minor reduction in average high-temperature is observed, shifting from a pleasant 71.2°F (21.8°C) in August to a refreshing 64°F (17.8°C). Glacier, in September, observes a steady average low-temperature of 43.5°F (6.4°C).Humidity
In Glacier, the average relative humidity in September is 79%.Rainfall
In September, the rain falls for 15.1 days. Throughout September, 3.82" (97mm) of precipitation is accumulated. In Glacier, during the entire year, the rain falls for 194.4 days and collects up to 69.29" (1760mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
The average length of the day in September is 12h and 34min.On the first day of September, sunrise is at 6:25 am and sunset at 7:49 pm. On the last day of the month, sunrise is at 7:07 am and sunset at 6:47 pm PDT.
Sunshine
In September, the average sunshine is 8h.UV index
In Glacier, the average daily maximum UV index in September is 3. A UV Index estimate of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: A maximum high UV index of 3 in September translates into the following recommendations:
Heed the precautions - It is counselled to guard against solar damage. Minimize direct exposure to the Sun during midday when its radiation is at its peak. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Glacier in September?
What is the average humidity in September?
How many days does it rain in September?
When it does not snow?
Does it snow in September?
How many hours of daylight does Glacier have in September?
When are sunrise and sunset in September?
How many hours of sunshine does Glacier have in September?
What is the UV index intensity in September in Glacier?
Average temperature in September
Glacier, WA
- Average high temperature in September: 64°F
The warmest month (with the highest average high temperature) is August (71.2°F).
The month with the lowest average high temperature is December (35.6°F).
- Average low temperature in September: 43.5°F
The month with the highest average low temperature is August (46.9°F).
The coldest month (with the lowest average low temperature) is December (26.1°F).
Average pressure in September
Glacier, WA
- Average pressure in September: 30"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The months with the lowest atmospheric pressure are May, June, August and September (30"Hg).
Average wind speed in September
Glacier, WA
- Average wind speed in September: 3.4mph
The windiest month (with the highest average wind speed) is January (4.6mph).
The calmest month (with the lowest average wind speed) is August (3.3mph).
Average humidity in September
Glacier, WA
- Average humidity in September: 79%
The month with the highest relative humidity is January (90%).
The month with the lowest relative humidity is July (74%).
Average rainfall in September
Glacier, WA
- Average rainfall in September: 3.82"
The wettest month (with the highest rainfall) is January (10.39").
The driest month (with the least rainfall) is July (1.5").
Average rainfall days in September
Glacier, WA
- Average rainfall days in September: 15.1 days
The month with the highest number of rainy days is April (21.3 days).
The month with the least rainy days is August (10.3 days).
Average snowfall in September
Glacier, WA
- Average snowfall in September: 0"
The month with the highest snowfall is February (22.36").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Glacier, WA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is December (11.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Glacier, WA
- Average daylight in September: 12h and 4min
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 18min).
- Average sunshine in September: 8h and 0min
The month with the most sunshine is August (Average sunshine: 10h and 0min).
The month with the least sunshine is December (Average sunshine: 3h and 18min).
Average sunshine days in September
Glacier, WA
- Average sunshine days in September: 13.1 days
The month with the most sunshine days is August (18.1 days).
The month with the least sunshine days is April (6.8 days).
Average UV index in September
Glacier, WA
- 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 and November (UV index 1).
Average cloud cover in September
Glacier, WA
- Average cloud cover in September: 46
The month with the most cloud cover is March (Cloud cover 67).
The month with the least cloud cover is August (Cloud cover 34).
Average visibility in September
Glacier, WA
- Average visibility in September: 4mi
The months with the highest visibility are June, July and August (5mi).
The months with the lowest visibility are January, February, March, April, May, September, October, November and December (4mi).
Glacier, Washington, USA
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