September weather forecastIsland City, OR
September
Weather in September
September, the first month of the autumn in Island City, is still a pleasant month, with an average temperature ranging between max 72.1°F (22.3°C) and min 46°F (7.8°C).Temperature
Setting in of September comes with a decrease in the average high-temperature, moving from a moderately hot 81.3°F (27.4°C) in August to a pleasant 72.1°F (22.3°C). Island City anticipates a considerable daily temperature fluctuation in September, with low temperatures averaging a chilly 46°F (7.8°C).Humidity
The average relative humidity in September is 52%.Rainfall
In September, the rain falls for 6.5 days. Throughout September, 0.67" (17mm) of precipitation is accumulated. Throughout the year, there are 141.7 rainfall days, and 18.43" (468mm) 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 0.2 snowfall days, it receives 0.04" (1mm) of snow. Throughout the year, there are 56.6 snowfall days, and 36.85" (936mm) of snow is accumulated.Daylight
In September, the average length of the day is 12h and 31min.On the first day of the month, sunrise is at 6:14 am and sunset at 7:29 pm. On the last day of September, sunrise is at 6:50 am and sunset at 6:33 pm PDT.
Sunshine
In Island City, the average sunshine in September is 10.6h.UV index
In Island City, the average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for the average person.Note: In September, the maximum UV index of 4 transforms into these recommendations:
Be vigilant - Preventing sunburn is recommended. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage. Take into account! The reflection from snow can nearly double the Sun's UV radiation intensity.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Island City, OR
- Average high temperature in September: 72.1°F
The warmest month (with the highest average high temperature) is August (81.3°F).
The month with the lowest average high temperature is December (32.5°F).
- Average low temperature in September: 46°F
The month with the highest average low temperature is August (52.2°F).
The coldest month (with the lowest average low temperature) is December (20.5°F).
Average pressure in September
Island City, OR
- Average pressure in September: 29.96"Hg
The month with the highest atmospheric pressure is January (30.22"Hg).
The month with the lowest atmospheric pressure is August (29.92"Hg).
Average wind speed in September
Island City, OR
- Average wind speed in September: 4.6mph
The windiest month (with the highest average wind speed) is January (7.1mph).
The calmest month (with the lowest average wind speed) is August (4.4mph).
Average humidity in September
Island City, OR
- Average humidity in September: 52%
The months with the highest relative humidity are January and February (86%).
The month with the lowest relative humidity is August (45%).
Average rainfall in September
Island City, OR
- Average rainfall in September: 0.67"
The wettest month (with the highest rainfall) is December (2.48").
The driest month (with the least rainfall) is July (0.35").
Average rainfall days in September
Island City, OR
- Average rainfall days in September: 6.5 days
The month with the highest number of rainy days is March (17.3 days).
The month with the least rainy days is August (4.8 days).
Average snowfall in September
Island City, OR
- Average snowfall in September: 0.04"
The month with the highest snowfall is February (10.2").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Island City, OR
- Average snowfall days in September: 0.2 days
The month with the highest number of snowfall days is December (13.2 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Island City, OR
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in September: 10h and 36min
The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The months with the least sunshine are January and February (Average sunshine: 5h and 6min).
Average sunshine days in September
Island City, OR
- Average sunshine days in September: 21.6 days
The month with the most sunshine days is July (23.4 days).
The month with the least sunshine days is February (9.1 days).
Average UV index in September
Island City, OR
- Average UV index in September: 4
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, March, April, November and December (UV index 2).
Average cloud cover in September
Island City, OR
- Average cloud cover in September: 17
The month with the most cloud cover is February (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 10).
Average visibility in September
Island City, OR
- Average visibility in September: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February and December (5mi).
