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 sea temperature 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
During the shift to September, Homer records a mild decrease in average high-temperature, moving from a moderate 56.7°F (13.7°C) in August to a fresh 51.3°F (10.7°C). During September, Homer's nights hold steady with an average temperature of 43.9°F (6.6°C), barely dropping from the daytime highs.Humidity
In Homer, the average relative humidity in September is 82%.Rainfall
In September, in Homer, the rain falls for 19.9 days. Throughout September, 3.86" (98mm) of precipitation is accumulated. Throughout the year, in Homer, Alaska, there are 183.8 rainfall days, and 35.16" (893mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, September through December. September is the first month it typically snows in Homer, Alaska. Throughout September, in the average 0.3 snowfall days, it receives 0.39" (10mm) of snow. In Homer, during the entire year, snow falls for 78.8 days and aggregates up to 48.43" (1230mm) of snow.Ocean temperature
In Homer, in September, the average water temperature is 51.8°F (11°C).Note: Swimming at temperatures less than 50°F (10°C) in 51.8°F (11°C) is feasible with the right swimsuit; if not, expect cold shock and breathlessness. A quick swim at 55.4°F (13°C) without adequate warmth can be discomforting.
Daylight
In Homer, the average length of the day in September is 12h and 49min.On the first day of September in Homer, sunrise is at 7:04 am and sunset at 9:07 pm. On the last day of the month, sunrise is at 8:11 am and sunset at 7:40 pm AKDT.
Sunshine
In September, the average sunshine in Homer 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 radiation for average individuals.Note: An average maximum UV index of 2 in September leads to these recommendations:
While most people can stay under the sun for an hour without burning, children must always be guarded against sun exposure. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. Employ a wide-brim hat for potent defense against up to 50% of UV rays. Forewarned is forearmed! The Sun's UV radiation can be almost doubled in intensity by snow reflection.
Frequently asked questions
What is the temperature in September in Homer?
What is the average humidity in September in Homer?
How many days does it rain in September in Homer?
When does it start to snow in Homer?
What is the ocean temperature in September in Homer?
How many hours of daylight does Homer have in September?
What time are sunrise and sunset in September in Homer?
How long on average sun shines in September in Homer?
How high is the UV index in September in Homer?
Average temperature in September
Homer, 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
Homer, 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
Homer, 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
Homer, 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
Homer, 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
Homer, 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
Homer, 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
Homer, 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 sea temperature in September
Homer, AK
- Average sea temperature in September: 52°F
The best month for swimming (with the highest average sea temperature) is August (54°F).
The coldest month (with the lowest average sea temperature) is March (39°F).
Average daylight in September /
Average sunshine in September
Homer, AK
- Average daylight in September: 12h and 5min
The month with the longest days is June (Average daylight: 18h and 36min).
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
Homer, 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
Homer, 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
Homer, 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
Homer, 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).
Homer, Alaska, USA
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