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
September involves a decrease in temperature, down from a cool 54.1°F (12.3°C) in August to an icy 41°F (5°C). In September, Umiat's temperature tends to fall to an average low of 30.9°F (-0.6°C) during the night.Humidity
In September, the average relative humidity is 82%.Rainfall
In Umiat, Alaska, in September, it is raining for 9.5 days, with typically 0.94" (24mm) of accumulated precipitation. Throughout the year, there are 73.5 rainfall days, and 8.39" (213mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through June, August through December. In Umiat, in September, during 11.4 snowfall days, 3.58" (91mm) of snow is typically accumulated. In Umiat, Alaska, during the entire year, snow falls for 139.2 days and aggregates up to 28.35" (720mm) of snow.Daylight
The average length of the day in September is 13h and 14min.On the first day of September in Umiat, sunrise is at 6:32 am and sunset at 9:44 pm. On the last day of the month, sunrise is at 8:23 am and sunset at 7:33 pm AKDT.
Sunshine
The average sunshine in September is 4.3h.UV index
The months with the lowest UV index are January through April, September through December, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a low health risk from exposure to the Sun's UV radiation for the ordinary person.Note: The maximum UV index of 1 during September leads to these instructions:
Extended exposure to the sun should always be avoided by children, infants, and those with sensitive skin. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage. Be prepared! The intensity of the Sun's UV radiation can be amplified nearly double due to snow reflection.
Frequently asked questions
Is September cold in Umiat?
What is the average humidity in September in Umiat?
How many days does it rain in September in Umiat?
How much does it snow in Umiat in September?
How many hours of daylight does Umiat have in September?
What time are sunrise and sunset in September in Umiat?
How long on average sun shines in September in Umiat?
What is the month with the lowest UV index in Umiat?
What is the UV index reading in September in Umiat?
Average temperature in September
Umiat, AK
- Average high temperature in September: 41°F
The warmest month (with the highest average high temperature) is July (63.7°F).
The month with the lowest average high temperature is January (-8.9°F).
- Average low temperature in September: 30.9°F
The month with the highest average low temperature is July (46.2°F).
The coldest month (with the lowest average low temperature) is January (-20.7°F).
Average pressure in September
Umiat, AK
- Average pressure in September: 29.83"Hg
The months with the highest atmospheric pressure are January and March (30.06"Hg).
The month with the lowest atmospheric pressure is September (29.83"Hg).
Average wind speed in September
Umiat, AK
- Average wind speed in September: 7.5mph
The windiest month (with the highest average wind speed) is June (8.3mph).
The calmest month (with the lowest average wind speed) is December (5.3mph).
Average humidity in September
Umiat, AK
- Average humidity in September: 82%
The months with the highest relative humidity are April and May (93%).
The month with the lowest relative humidity is July (65%).
Average rainfall in September
Umiat, AK
- Average rainfall in September: 0.94"
The wettest month (with the highest rainfall) is August (1.65").
The driest month (with the least rainfall) is January (0.28").
Average rainfall days in September
Umiat, AK
- Average rainfall days in September: 9.5 days
The month with the highest number of rainy days is August (17.2 days).
The month with the least rainy days is February (0.7 days).
Average snowfall in September
Umiat, AK
- Average snowfall in September: 3.58"
The month with the highest snowfall is October (5.08").
The month with the least snowfall is July (0").
Average snowfall days in September
Umiat, AK
- Average snowfall days in September: 11.4 days
The month with the highest number of snowfall days is November (19.2 days).
The month with the least snowfall days is July (0.1 days).
Average daylight in September /
Average sunshine in September
Umiat, AK
- Average daylight in September: 13h and 1min
The month with the longest days is August (Average daylight: 17h and 48min).
The months with the shortest days are June and December (Average daylight: 0h and 0min).
- Average sunshine in September: 4h and 2min
The month with the most sunshine is August (Average sunshine: 6h and 42min).
The month with the least sunshine is December (Average sunshine: 0h and 24min).
Average sunshine days in September
Umiat, AK
- Average sunshine days in September: 10.5 days
The month with the most sunshine days is January (18.7 days).
The month with the least sunshine days is August (9.9 days).
Average UV index in September
Umiat, AK
- Average UV index in September: 1
The month with the highest UV index is June (UV index 4).
The months with the lowest UV index are January, February, March, April, September, October, November and December (UV index 1).
Average cloud cover in September
Umiat, AK
- Average cloud cover in September: 69
The month with the most cloud cover is May (Cloud cover 75).
The month with the least cloud cover is June (Cloud cover 49).
Average visibility in September
Umiat, AK
- Average visibility in September: 5mi
The months with the highest visibility are June, July and August (6mi).
The month with the lowest visibility is December (3mi).
Umiat, Alaska, USA
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