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
The advent of September brings a subtle shift in temperature, with the average high moving from a refreshing 56.7°F (13.7°C) in August to a cool 51.3°F (10.7°C). The September average low temperature, marginally lower than the daytime high, records at a frosty 43.9°F (6.6°C).Humidity
In September, the average relative humidity is 82%.Rainfall
In September, the rain falls for 19.9 days. Throughout September, 3.86" (98mm) of precipitation is accumulated. In Kachemak Silo, during the entire year, the rain falls for 183.8 days and collects up to 35.16" (893mm) of precipitation.Snowfall
Months with snowfall are January through May, September through December. September is the first month it typically snows. Throughout September, in the average 0.3 snowfall days, it receives 0.39" (10mm) of snow. In Kachemak Silo, during the entire year, snow falls for 78.8 days and aggregates up to 48.43" (1230mm) of snow.Daylight
The average length of the day in September is 12h and 49min.On the first day of September, sunrise is at 7:02 am and sunset at 9:05 pm. On the last day of the month, sunrise is at 8:09 am and sunset at 7:38 pm AKDT.
Sunshine
In September, the average sunshine is 5.9h.UV index
The average daily maximum UV index in September is 2. A UV Index value of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV rays for average individuals.Note: The UV index of 2 during September leads to these advisories:
Most people face no serious problems with extended sun exposure, but those with fair skin, infants, and children always need protection. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses. 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 are September temperatures?
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 in Kachemak Silo?
How long on average sun shines in September in Kachemak Silo?
What is the UV index reading in September?
Average temperature in September
Kachemak Silo, AK
- Average high temperature in September: 51.3°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 (27°F).
- Average low temperature in September: 43.9°F
The months with the highest average low temperature are July and August (48.7°F).
The coldest month (with the lowest average low temperature) is January (21.6°F).
Average pressure in September
Kachemak Silo, AK
- Average pressure in September: 29.72"Hg
The month with the highest atmospheric pressure is July (29.96"Hg).
The month with the lowest atmospheric pressure is December (29.6"Hg).
Average wind speed in September
Kachemak Silo, AK
- Average wind speed in September: 6.6mph
The windiest month (with the highest average wind speed) is November (8.8mph).
The calmest month (with the lowest average wind speed) is June (5.1mph).
Average humidity in September
Kachemak Silo, AK
- Average humidity in September: 82%
The months with the highest relative humidity are January and December (86%).
The month with the lowest relative humidity is May (76%).
Average rainfall in September
Kachemak Silo, AK
- Average rainfall in September: 3.86"
The wettest month (with the highest rainfall) is December (4.65").
The driest month (with the least rainfall) is June (1.54").
Average rainfall days in September
Kachemak Silo, AK
- Average rainfall days in September: 19.9 days
The month with the highest number of rainy days is September (19.9 days).
The month with the least rainy days is February (9 days).
Average snowfall in September
Kachemak Silo, AK
- Average snowfall in September: 0.39"
The month with the highest snowfall is December (11.54").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Kachemak Silo, AK
- Average snowfall days in September: 0.3 days
The month with the highest number of snowfall days is December (14.9 days).
The months with the least snowfall days are June and August (0 days).
Average daylight in September /
Average sunshine in September
Kachemak Silo, AK
- Average daylight in September: 12h and 5min
The month with the longest days is June (Average daylight: 18h and 42min).
The month with the shortest days is December (Average daylight: 6h and 6min).
- Average sunshine in September: 5h and 5min
The months with the most sunshine are June and July (Average sunshine: 8h and 48min).
The month with the least sunshine is December (Average sunshine: 2h and 36min).
Average sunshine days in September
Kachemak Silo, AK
- Average sunshine days in September: 9.1 days
The months with the most sunshine days are March and July (12.3 days).
The month with the least sunshine days is December (8.5 days).
Average UV index in September
Kachemak Silo, AK
- Average UV index in September: 2
The month with the highest UV index is July (UV index 4).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in September
Kachemak Silo, AK
- Average cloud cover in September: 54
The month with the most cloud cover is December (Cloud cover 62).
The month with the least cloud cover is July (Cloud cover 52).
Average visibility in September
Kachemak Silo, AK
- Average visibility in September: 6mi
The months with the highest visibility are May, June, July, September, October and November (6mi).
The months with the lowest visibility are January, February, March, April, August and December (5mi).
Kachemak Silo, Alaska, USA
Weather forecast for your location
2. Allow the app to use your location