September weather forecastMcCarthy, AK
September
Weather in September
The first month of the autumn, September, is also a frosty month in McCarthy, Alaska, with an average temperature varying between 44.6°F (7°C) and 33.4°F (0.8°C).Temperature
The start of September signals a gentle decrease in the average high-temperature, transitioning from a cool 52.5°F (11.4°C) in August to a frosty 44.6°F (7°C). Throughout September, an average nighttime temperature of 33.4°F (0.8°C) is experienced.Humidity
The average relative humidity in September in McCarthy is 73%.Rainfall
The month with the most rainfall is September, when the rain falls for 16.3 days and typically aggregates up to 1.69" (43mm) of precipitation.Snowfall
January through May, September through December are months with snowfall. September is the first month it typically snows in McCarthy. Throughout September, in the average 1 snowfall days, it receives 0.2" (5mm) of snow. In McCarthy, during the entire year, snow falls for 95.3 days and aggregates up to 44.02" (1118mm) of snow.Daylight
In McCarthy, the average length of the day in September is 12h and 52min.On the first day of September, sunrise is at 6:25 am and sunset at 8:37 pm. On the last day of the month, sunrise is at 7:38 am and sunset at 7:04 pm AKDT.
Sunshine
The average sunshine in September is 9.4h.UV index
In McCarthy, the average daily maximum UV index in September is 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: The average daily UV index of 2 in September transforms into the following instructions:
Babies, children, and those with sensitive skin should always avoid extended periods in the sun. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat. Beware! Reflection from snow can magnify the Sun's UV radiation nearly twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
McCarthy, AK
- Average high temperature in September: 44.6°F
The warmest month (with the highest average high temperature) is July (56.8°F).
The month with the lowest average high temperature is January (13.5°F).
- Average low temperature in September: 33.4°F
The month with the highest average low temperature is July (43.2°F).
The coldest month (with the lowest average low temperature) is February (1°F).
Average pressure in September
McCarthy, AK
- Average pressure in September: 29.8"Hg
The month with the highest atmospheric pressure is July (29.96"Hg).
The month with the lowest atmospheric pressure is November (29.76"Hg).
Average wind speed in September
McCarthy, AK
- Average wind speed in September: 4mph
The windiest months (with the highest average wind speed) are January and November (5.2mph).
The calmest month (with the lowest average wind speed) is August (3.9mph).
Average humidity in September
McCarthy, AK
- Average humidity in September: 73%
The months with the highest relative humidity are January, March, April and December (82%).
The month with the lowest relative humidity is June (66%).
Average rainfall in September
McCarthy, AK
- Average rainfall in September: 1.69"
The wettest month (with the highest rainfall) is September (1.69").
The driest month (with the least rainfall) is April (0.71").
Average rainfall days in September
McCarthy, AK
- Average rainfall days in September: 16.3 days
The month with the highest number of rainy days is August (18.6 days).
The month with the least rainy days is February (8.4 days).
Average snowfall in September
McCarthy, AK
- Average snowfall in September: 0.2"
The month with the highest snowfall is December (9.37").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
McCarthy, AK
- Average snowfall days in September: 1 days
The month with the highest number of snowfall days is December (17.2 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
McCarthy, AK
- Average daylight in September: 12h and 54min
The month with the longest days is June (Average daylight: 19h and 18min).
The month with the shortest days is December (Average daylight: 5h and 36min).
- Average sunshine in September: 9h and 24min
The month with the most sunshine is June (Average sunshine: 14h and 12min).
The month with the least sunshine is December (Average sunshine: 4h and 0min).
Average sunshine days in September
McCarthy, AK
- Average sunshine days in September: 11.1 days
The month with the most sunshine days is March (15.8 days).
The month with the least sunshine days is August (9.7 days).
Average UV index in September
McCarthy, 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, November and December (UV index 1).
Average cloud cover in September
McCarthy, AK
- Average cloud cover in September: 36
The month with the most cloud cover is December (Cloud cover 41).
The months with the least cloud cover are March, May and June (Cloud cover 35).
Average visibility in September
McCarthy, 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, November and December (5mi).
