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 onset of September results in a decrease in the average high-temperature, receding from a warm 80.6°F (27°C) in August to a pleasant 71.1°F (21.7°C). Against the high September temperatures, Weston records an average drop to a chilly 48.2°F (9°C) at night.Humidity
The average relative humidity in September in Weston is 53%.Rainfall
In Weston, during September, the rain falls for 7.2 days and regularly aggregates up to 0.79" (20mm) of precipitation. In Weston, during the entire year, the rain falls for 127.6 days and collects up to 24.33" (618mm) of precipitation.Snowfall
January through May, September through December are months with snowfall in Weston. 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 Weston, during the entire year, snow falls for 84.8 days and aggregates up to 74.33" (1888mm) of snow.Daylight
In Weston, the average length of the day in September is 12h and 31min.On the first day of the month, sunrise is at 6:15 am and sunset at 7:31 pm. On the last day of September, in Weston, sunrise is at 6:51 am and sunset at 6:34 pm PDT.
Sunshine
In September, the average sunshine is 10.3h.UV index
The average daily maximum UV index in September in Weston is 3. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for ordinary individuals.Note: The maximum daily UV index of 3 during September translates into the following directions:
Exercise caution. Those with pale skin may experience burns in less than half an hour. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. Tightly woven clothing, when worn loosely, shields effectively against the Sun. Warning! The reflection from snow can nearly magnify the Sun's UV radiation twofold.
Frequently asked questions
What is the average September temperature in Weston?
What is the average humidity in September in Weston?
How much does it rain in Weston in September?
When does it start to snow in Weston?
How many hours of daylight does Weston have in September?
When are sunrise and sunset in September in Weston?
How many hours of sunshine does Weston have in September?
What is the UV index intensity in September in Weston?
Average temperature in September
Weston, OR
- Average high temperature in September: 71.1°F
The warmest month (with the highest average high temperature) is August (80.6°F).
The month with the lowest average high temperature is December (34.5°F).
- Average low temperature in September: 48.2°F
The month with the highest average low temperature is August (54.3°F).
The coldest month (with the lowest average low temperature) is December (22.3°F).
Average pressure in September
Weston, OR
- Average pressure in September: 29.96"Hg
The month with the highest atmospheric pressure is January (30.21"Hg).
The month with the lowest atmospheric pressure is August (29.91"Hg).
Average wind speed in September
Weston, OR
- Average wind speed in September: 4.9mph
The windiest month (with the highest average wind speed) is March (6.7mph).
The calmest month (with the lowest average wind speed) is September (4.9mph).
Average humidity in September
Weston, OR
- Average humidity in September: 53%
The months with the highest relative humidity are January, February and December (84%).
The month with the lowest relative humidity is August (44%).
Average rainfall in September
Weston, OR
- Average rainfall in September: 0.79"
The wettest month (with the highest rainfall) is February (3.23").
The driest month (with the least rainfall) is July (0.24").
Average rainfall days in September
Weston, OR
- Average rainfall days in September: 7.2 days
The month with the highest number of rainy days is March (15.9 days).
The month with the least rainy days is August (4.8 days).
Average snowfall in September
Weston, OR
- Average snowfall in September: 0.39"
The month with the highest snowfall is February (19.21").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Weston, OR
- Average snowfall days in September: 0.3 days
The month with the highest number of snowfall days is December (17.7 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Weston, OR
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in September: 10h and 2min
The month with the most sunshine is August (Average sunshine: 12h and 0min).
The months with the least sunshine are January and December (Average sunshine: 4h and 36min).
Average sunshine days in September
Weston, OR
- Average sunshine days in September: 21.5 days
The month with the most sunshine days is July (24.5 days).
The months with the least sunshine days are February and March (8.2 days).
Average UV index in September
Weston, OR
- Average UV index in September: 3
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
Weston, OR
- Average cloud cover in September: 19
The month with the most cloud cover is February (Cloud cover 54).
The months with the least cloud cover are July and August (Cloud cover 11).
Average visibility in September
Weston, 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).
Weston, Oregon, USA
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