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's arrival corresponds with a decrease in average high-temperatures, from August's comfortable 61.3°F (16.3°C) to a fresh 50.9°F (10.5°C). During September, McGrath consistently records a temperature low averaging a wintry 37.4°F (3°C).Humidity
In McGrath, the average relative humidity in September is 80%.Rainfall
In McGrath, in September, during 14.5 rainfall days, 1.97" (50mm) of precipitation is typically accumulated. Throughout the year, there are 111.7 rainfall days, and 14.88" (378mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, September through December. September is the first month it typically snows. Throughout September, in the average 1.5 snowfall days, it receives 0.63" (16mm) of snow. In McGrath, during the entire year, snow falls for 96.1 days and aggregates up to 38.66" (982mm) of snow.Daylight
The average length of the day in September is 12h and 55min.On the first day of the month, sunrise is at 7:11 am and sunset at 9:32 pm. On the last day of September, sunrise is at 8:30 am and sunset at 7:53 pm AKDT.
Sunshine
In September, the average sunshine is 5.6h.UV index
The average daily maximum UV index in September is 2. A UV Index estimate of 2, and below, represents a low threat to health from exposure to the Sun's UV radiation for the average person.Note: The daily high UV index of 2 in September translates into this advice:
While most individuals can withstand prolonged sun exposure, it is imperative that babies, children, and those with sensitive skin always be shielded. To avoid the Sun's strongest rays, limit exposure around the mid-day period. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat. Bear in mind! The Sun's UV radiation can nearly double in intensity due to the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September?
What is the average humidity in September?
How many days does it rain in September?
When does it start to snow?
How many hours of daylight does McGrath have in September?
What time are sunrise and sunset in September?
How long on average sun shines in September?
What is the UV index reading in September?
Average temperature in September
McGrath, AK
- Average high temperature in September: 50.9°F
The warmest month (with the highest average high temperature) is July (67.1°F).
The month with the lowest average high temperature is January (2.5°F).
- Average low temperature in September: 37.4°F
The month with the highest average low temperature is July (50°F).
The coldest month (with the lowest average low temperature) is January (-8°F).
Average pressure in September
McGrath, AK
- Average pressure in September: 29.75"Hg
The month with the highest atmospheric pressure is July (29.92"Hg).
The month with the lowest atmospheric pressure is October (29.72"Hg).
Average wind speed in September
McGrath, AK
- Average wind speed in September: 5.5mph
The windiest month (with the highest average wind speed) is May (5.9mph).
The calmest months (with the lowest average wind speed) are February, November and December (5.3mph).
Average humidity in September
McGrath, AK
- Average humidity in September: 80%
The month with the highest relative humidity is March (94%).
The month with the lowest relative humidity is June (62%).
Average rainfall in September
McGrath, AK
- Average rainfall in September: 1.97"
The wettest month (with the highest rainfall) is August (2.13").
The driest month (with the least rainfall) is January (0.47").
Average rainfall days in September
McGrath, AK
- Average rainfall days in September: 14.5 days
The month with the highest number of rainy days is August (18.9 days).
The month with the least rainy days is February (2.3 days).
Average snowfall in September
McGrath, AK
- Average snowfall in September: 0.63"
The month with the highest snowfall is November (10.16").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
McGrath, AK
- Average snowfall days in September: 1.5 days
The months with the highest number of snowfall days are March and November (15.8 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
McGrath, AK
- Average daylight in September: 12h and 5min
The month with the longest days is June (Average daylight: 20h and 6min).
The month with the shortest days is December (Average daylight: 4h and 54min).
- Average sunshine in September: 5h and 4min
The month with the most sunshine is May (Average sunshine: 10h and 6min).
The month with the least sunshine is December (Average sunshine: 2h and 24min).
Average sunshine days in September
McGrath, AK
- Average sunshine days in September: 11.4 days
The month with the most sunshine days is January (20.3 days).
The month with the least sunshine days is August (9.6 days).
Average UV index in September
McGrath, AK
- Average UV index in September: 2
The months with the highest UV index are May, June and July (UV index 4).
The months with the lowest UV index are January, March, October, November and December (UV index 1).
Average cloud cover in September
McGrath, AK
- Average cloud cover in September: 56
The month with the most cloud cover is April (Cloud cover 68).
The months with the least cloud cover are May and June (Cloud cover 47).
Average visibility in September
McGrath, AK
- Average visibility in September: 5mi
The months with the highest visibility are May, June and July (6mi).
The months with the lowest visibility are January, February, March, April, November and December (4mi).
McGrath, Alaska, USA
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