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
With September's arrival, Evergreen's weather changes as the average high-temperature falls from a moderately hot 77.4°F (25.2°C) in August to a refreshing 65.7°F (18.7°C). September presents a pronounced divergence from daily peak temperatures in Evergreen, with the average low-temperature of 39.9°F (4.4°C).Humidity
In Evergreen, the average relative humidity in September is 63%.Rainfall
In Evergreen, in September, during 8.6 rainfall days, 0.91" (23mm) of precipitation is typically accumulated. In Evergreen, during the entire year, the rain falls for 142.8 days and collects up to 17.36" (441mm) of precipitation.Snowfall
January through May, September through December are months with snowfall. September is the first month it typically snows in Evergreen. Throughout September, in the average 0.2 snowfall days, it receives 0.04" (1mm) of snow. In Evergreen, during the entire year, snow falls for 104.7 days and aggregates up to 51.34" (1304mm) of snow.Daylight
In September, the average length of the day in Evergreen is 12h and 34min.On the first day of September in Evergreen, sunrise is at 6:56 am and sunset at 8:17 pm. On the last day of the month, sunrise is at 7:36 am and sunset at 7:17 pm MDT.
Sunshine
In Evergreen, the average sunshine in September is 9.4h.UV index
In Evergreen, the average daily maximum UV index in September is 3. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for average individuals.Note: In September, the maximum UV index of 3 suggests this advice:
Ensure safety - Recommendations to avert sunburn are presented. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key. Notice! The UV radiation of the Sun can be intensified nearly twofold due to the reflective quality of snow.
Frequently asked questions
What are September temperatures in Evergreen?
What is the average humidity in September in Evergreen?
How much does it rain in Evergreen in September?
When does it start snowing in Evergreen?
How many hours of daylight does Evergreen have in September?
When are sunrise and sunset in September in Evergreen?
How long on average sun shines in September in Evergreen?
What is the UV index reading in September in Evergreen?
Average temperature in September
Evergreen, MT
- Average high temperature in September: 65.7°F
The warmest month (with the highest average high temperature) is July (77.5°F).
The month with the lowest average high temperature is December (25.9°F).
- Average low temperature in September: 39.9°F
The month with the highest average low temperature is August (46.4°F).
The coldest month (with the lowest average low temperature) is February (14.4°F).
Average pressure in September
Evergreen, MT
- Average pressure in September: 29.97"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Evergreen, MT
- Average wind speed in September: 3.8mph
The windiest month (with the highest average wind speed) is April (4.7mph).
The calmest month (with the lowest average wind speed) is August (3.7mph).
Average humidity in September
Evergreen, MT
- Average humidity in September: 63%
The month with the highest relative humidity is January (93%).
The month with the lowest relative humidity is August (55%).
Average rainfall in September
Evergreen, MT
- Average rainfall in September: 0.91"
The wettest month (with the highest rainfall) is June (2.05").
The driest month (with the least rainfall) is August (0.55").
Average rainfall days in September
Evergreen, MT
- Average rainfall days in September: 8.6 days
The month with the highest number of rainy days is April (17.9 days).
The month with the least rainy days is August (6.6 days).
Average snowfall in September
Evergreen, MT
- Average snowfall in September: 0.04"
The month with the highest snowfall is January (11.3").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Evergreen, MT
- Average snowfall days in September: 0.2 days
The month with the highest number of snowfall days is December (21.5 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Evergreen, 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 54min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in September
Evergreen, MT
- Average sunshine days in September: 19.6 days
The month with the most sunshine days is August (21.8 days).
The month with the least sunshine days is February (6.8 days).
Average UV index in September
Evergreen, 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, November and December (UV index 1).
Average cloud cover in September
Evergreen, MT
- Average cloud cover in September: 23
The month with the most cloud cover is January (Cloud cover 63).
The months with the least cloud cover are July and August (Cloud cover 15).
Average visibility in September
Evergreen, MT
- Average visibility in September: 6mi
The months with the highest visibility are May, June, July, August, September and October (6mi).
The month with the lowest visibility is January (3mi).
Evergreen, Montana, USA
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