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
A subtle shift in Sunnyside's weather is observed as August turns into September, with the average high temperature reducing from a mild 56.5°F (13.6°C) to a fresh 51.1°F (10.6°C). September nights witness a mild cool down to an average low of 45°F (7.2°C).Humidity
In September, the average relative humidity in Sunnyside is 88%.Rainfall
In September, the rain falls for 18.3 days. Throughout September, 3.62" (92mm) of precipitation is accumulated. In Sunnyside, Alaska, during the entire year, the rain falls for 182.7 days and collects up to 37.4" (950mm) of precipitation.Snowfall
May through September are months without snowfall.Daylight
In Sunnyside, the average length of the day in September is 12h and 46min.On the first day of the month, sunrise is at 6:07 am and sunset at 8:02 pm. On the last day of September, in Sunnyside, Alaska, sunrise is at 7:09 am and sunset at 6:40 pm AKDT.
Sunshine
The average sunshine in September in Sunnyside is 5.4h.UV index
In September, the average daily maximum UV index is 2. A UV Index estimate of 2, and below, represents a minimal health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: The daily high UV index of 2 in September translates into this advice:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.
Frequently asked questions
What is the usual temperature for Sunnyside in September?
What is the average humidity in September in Sunnyside?
How much does it rain in Sunnyside in September?
When it does not snow in Sunnyside?
Does it snow in Sunnyside in September?
What is the average length of the day in September in Sunnyside?
When are sunrise and sunset in September in Sunnyside?
How many hours of sunshine does Sunnyside have in September?
What is the UV index reading in September in Sunnyside?
Average temperature in September
Sunnyside, AK
- Average high temperature in September: 51.1°F
The warmest month (with the highest average high temperature) is July (57.2°F).
The month with the lowest average high temperature is January (30.7°F).
- Average low temperature in September: 45°F
The month with the highest average low temperature is July (49.5°F).
The coldest month (with the lowest average low temperature) is February (25.9°F).
Average pressure in September
Sunnyside, AK
- Average pressure in September: 29.88"Hg
The month with the highest atmospheric pressure is July (30.03"Hg).
The month with the lowest atmospheric pressure is November (29.77"Hg).
Average wind speed in September
Sunnyside, AK
- Average wind speed in September: 5.1mph
The windiest month (with the highest average wind speed) is January (7mph).
The calmest months (with the lowest average wind speed) are June and July (3.7mph).
Average humidity in September
Sunnyside, AK
- Average humidity in September: 88%
The month with the highest relative humidity is August (90%).
The month with the lowest relative humidity is November (84%).
Average rainfall in September
Sunnyside, AK
- Average rainfall in September: 3.62"
The wettest months (with the highest rainfall) are October and November (4.21").
The driest month (with the least rainfall) is May (1.61").
Average rainfall days in September
Sunnyside, AK
- Average rainfall days in September: 18.3 days
The month with the highest number of rainy days is June (18.9 days).
The month with the least rainy days is February (8.2 days).
Average snowfall in September
Sunnyside, AK
- Average snowfall in September: 0"
The month with the highest snowfall is January (11.22").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Sunnyside, AK
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is March (13.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Sunnyside, AK
- Average daylight in September: 12h and 5min
The month with the longest days is June (Average daylight: 18h and 6min).
The month with the shortest days is December (Average daylight: 6h and 36min).
- Average sunshine in September: 5h and 2min
The month with the most sunshine is June (Average sunshine: 7h and 42min).
The months with the least sunshine are January and December (Average sunshine: 2h and 54min).
Average sunshine days in September
Sunnyside, AK
- Average sunshine days in September: 10.2 days
The months with the most sunshine days are February and May (12.5 days).
The month with the least sunshine days is June (7.7 days).
Average UV index in September
Sunnyside, AK
- Average UV index in September: 2
The month with the highest UV index is July (UV index 4).
The months with the lowest UV index are November and December (UV index 1).
Average cloud cover in September
Sunnyside, AK
- Average cloud cover in September: 63
The month with the most cloud cover is November (Cloud cover 71).
The month with the least cloud cover is May (Cloud cover 56).
Average visibility in September
Sunnyside, AK
- Average visibility in September: 5mi
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (5mi).
The months with the lowest visibility are July and August (4mi).
Sunnyside, Alaska, USA
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