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
As August makes way for September, Saint Michael's average high-temperature eases from a moderate 57.2°F (14°C) to a frosty 48.9°F (9.4°C). Saint Michael records a mild decrease in temperature during the nights of September, averaging a wintry 40.3°F (4.6°C).Humidity
The average relative humidity in September in Saint Michael, Alaska, is 80%.Rainfall
In Saint Michael, Alaska, during September, the rain falls for 15.1 days and regularly aggregates up to 1.42" (36mm) of precipitation. In Saint Michael, during the entire year, the rain falls for 118.6 days and collects up to 13.39" (340mm) of precipitation.Snowfall
January through May, September through December are months with snowfall in Saint Michael. September is the first month it typically snows. Throughout September, in the average 1.4 snowfall days, it receives 0.16" (4mm) of snow. Throughout the year, in Saint Michael, there are 94.3 snowfall days, and 27.2" (691mm) of snow is accumulated.Daylight
In September, the average length of the day is 12h and 56min.On the first day of September, sunrise is at 7:35 am and sunset at 9:59 pm. On the last day of the month, sunrise is at 8:56 am and sunset at 8:19 pm AKDT.
Sunshine
In Saint Michael, the average sunshine in September is 5.3h.UV index
In Saint Michael, Alaska, the average daily maximum UV index in September is 2. A UV Index reading of 2, and below, represents a low health risk from exposure to the Sun's UV radiation for average individuals.Note: The maximum UV index of 2 during September translates into these guidelines:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage. Watch out! The Sun's UV radiation can be nearly magnified twofold due to snow reflection.
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?
When is the sunrise / sunset in September?
How long on average sun shines in September?
What is the UV index reading in September?
Average temperature in September
Saint Michael, AK
- Average high temperature in September: 48.9°F
The warmest month (with the highest average high temperature) is July (59.5°F).
The month with the lowest average high temperature is January (9.1°F).
- Average low temperature in September: 40.3°F
The month with the highest average low temperature is July (48.7°F).
The coldest month (with the lowest average low temperature) is January (1.8°F).
Average pressure in September
Saint Michael, AK
- Average pressure in September: 29.75"Hg
The month with the highest atmospheric pressure is May (29.92"Hg).
The month with the lowest atmospheric pressure is October (29.72"Hg).
Average wind speed in September
Saint Michael, AK
- Average wind speed in September: 8.5mph
The windiest month (with the highest average wind speed) is October (9.6mph).
The calmest month (with the lowest average wind speed) is June (6mph).
Average humidity in September
Saint Michael, AK
- Average humidity in September: 80%
The month with the highest relative humidity is March (92%).
The month with the lowest relative humidity is June (72%).
Average rainfall in September
Saint Michael, AK
- Average rainfall in September: 1.42"
The wettest month (with the highest rainfall) is August (2.24").
The driest month (with the least rainfall) is January (0.55").
Average rainfall days in September
Saint Michael, AK
- Average rainfall days in September: 15.1 days
The month with the highest number of rainy days is August (19.8 days).
The month with the least rainy days is January (2.7 days).
Average snowfall in September
Saint Michael, AK
- Average snowfall in September: 0.16"
The month with the highest snowfall is November (4.76").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Saint Michael, AK
- Average snowfall days in September: 1.4 days
The month with the highest number of snowfall days is March (16.7 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Saint Michael, AK
- Average daylight in September: 12h and 5min
The month with the longest days is June (Average daylight: 20h and 24min).
The month with the shortest days is December (Average daylight: 4h and 42min).
- Average sunshine in September: 5h and 2min
The month with the most sunshine is May (Average sunshine: 8h and 18min).
The month with the least sunshine is June (Average sunshine: 2h and 54min).
Average sunshine days in September
Saint Michael, AK
- Average sunshine days in September: 12.5 days
The month with the most sunshine days is January (18.3 days).
The month with the least sunshine days is August (8.4 days).
Average UV index in September
Saint Michael, AK
- Average UV index in September: 2
The month with the highest UV index is July (UV index 4).
The months with the lowest UV index are January, February, March and December (UV index 1).
Average cloud cover in September
Saint Michael, AK
- Average cloud cover in September: 58
The month with the most cloud cover is August (Cloud cover 62).
The month with the least cloud cover is June (Cloud cover 50).
Average visibility in September
Saint Michael, AK
- 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, April and December (4mi).
Saint Michael, Alaska, USA
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