September weather forecastCantwell, AK
September
Weather in September
September, the first month of the autumn in Cantwell, is still a cold month, with an average temperature ranging between min 30.2°F (-1°C) and max 42.4°F (5.8°C).Temperature
In September, the average high-temperature goes from a cool 51.8°F (11°C) in August to an icy 42.4°F (5.8°C). During September in Cantwell, the average low-temperature is recorded at a freezing cold 30.2°F (-1°C).Humidity
In September, the average relative humidity is 85%.Rainfall
In Cantwell, in September, during 15.2 rainfall days, 1.34" (34mm) of precipitation is typically accumulated. In Cantwell, during the entire year, the rain falls for 124.9 days and collects up to 14.88" (378mm) of precipitation.Snowfall
January through June, August through December are months with snowfall. In Cantwell, in September, during 5.2 snowfall days, 2.13" (54mm) of snow is typically accumulated. Throughout the year, there are 145.2 snowfall days, and 58.39" (1483mm) of snow is accumulated.Daylight
In September, the average length of the day is 12h and 56min.On the first day of the month, sunrise is at 6:43 am and sunset at 9:07 pm. On the last day of September, sunrise is at 8:04 am and sunset at 7:26 pm AKDT.
Sunshine
In Cantwell, the average sunshine in September is 6.5h.UV index
In September, the average daily maximum UV index is 2. A UV Index reading of 2, and below, represents a minimal health hazard from exposure to the Sun's UV rays for average individuals.Note: The UV index of 2 in September translates into these instructions:
Extended exposure to the sun should always be avoided by children, infants, and those with sensitive skin. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses. Consider this! The reflection from snow can almost double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Cantwell, AK
- Average high temperature in September: 42.4°F
The warmest month (with the highest average high temperature) is July (57.7°F).
The month with the lowest average high temperature is January (3.4°F).
- Average low temperature in September: 30.2°F
The month with the highest average low temperature is July (41.7°F).
The coldest month (with the lowest average low temperature) is January (-8°F).
Average pressure in September
Cantwell, AK
- Average pressure in September: 29.76"Hg
The month with the highest atmospheric pressure is July (29.92"Hg).
The months with the lowest atmospheric pressure are September and October (29.76"Hg).
Average wind speed in September
Cantwell, AK
- Average wind speed in September: 5.2mph
The windiest month (with the highest average wind speed) is December (5.5mph).
The calmest months (with the lowest average wind speed) are May and June (4.8mph).
Average humidity in September
Cantwell, AK
- Average humidity in September: 85%
The month with the highest relative humidity is March (94%).
The month with the lowest relative humidity is June (70%).
Average rainfall in September
Cantwell, AK
- Average rainfall in September: 1.34"
The wettest month (with the highest rainfall) is June (2.13").
The driest month (with the least rainfall) is February (0.63").
Average rainfall days in September
Cantwell, AK
- Average rainfall days in September: 15.2 days
The month with the highest number of rainy days is June (20 days).
The month with the least rainy days is February (3.3 days).
Average snowfall in September
Cantwell, AK
- Average snowfall in September: 2.13"
The month with the highest snowfall is October (10.98").
The month with the least snowfall is July (0").
Average snowfall days in September
Cantwell, AK
- Average snowfall days in September: 5.2 days
The months with the highest number of snowfall days are March and April (20.3 days).
The month with the least snowfall days is July (0 days).
Average daylight in September /
Average sunshine in September
Cantwell, AK
- Average daylight in September: 12h and 54min
The month with the longest days is June (Average daylight: 20h and 18min).
The month with the shortest days is December (Average daylight: 4h and 48min).
- Average sunshine in September: 6h and 30min
The month with the most sunshine is June (Average sunshine: 11h and 18min).
The month with the least sunshine is December (Average sunshine: 2h and 48min).
Average sunshine days in September
Cantwell, AK
- Average sunshine days in September: 11 days
The month with the most sunshine days is January (14.8 days).
The month with the least sunshine days is April (6.7 days).
Average UV index in September
Cantwell, AK
- Average UV index in September: 2
The months with the highest UV index are June and July (UV index 3).
The months with the lowest UV index are January, February, March, April, October, November and December (UV index 1).
Average cloud cover in September
Cantwell, AK
- Average cloud cover in September: 58
The month with the most cloud cover is April (Cloud cover 63).
The month with the least cloud cover is June (Cloud cover 48).
Average visibility in September
Cantwell, AK
- Average visibility in September: 4mi
The months with the highest visibility are June and July (6mi).
The months with the lowest visibility are January, March and November (3mi).
