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
Setting in of September comes with a decrease in the average high-temperature, moving from a moderately hot 79.2°F (26.2°C) in August to a refreshing 67.8°F (19.9°C). Curlew anticipates a considerable daily temperature fluctuation in September, with low temperatures averaging a chilly 42.8°F (6°C).Humidity
In Curlew, the average relative humidity in September is 60%.Rainfall
In Curlew, during September, the rain falls for 9.6 days and regularly aggregates up to 1.1" (28mm) of precipitation. In Curlew, Washington, during the entire year, the rain falls for 112.2 days and collects up to 14.69" (373mm) of precipitation.Snowfall
January through May, September through December are months with snowfall. September is the first month it typically snows. Throughout September, in the average 0.4 snowfall days, it receives 2.09" (53mm) of snow. In Curlew, during the entire year, snow falls for 89.6 days and aggregates up to 47.44" (1205mm) of snow.Daylight
The average length of the day in September is 12h and 34min.On the first day of September, sunrise is at 6:12 am and sunset at 7:35 pm. On the last day of the month, sunrise is at 6:53 am and sunset at 6:34 pm PDT.
Sunshine
In September, the average sunshine is 10.4h.UV index
In September, the average daily maximum UV index is 3. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for ordinary individuals.Note: A maximum high daily UV index of 3 during September translates into the following directions:
Adopt protective measures - Suggestions to resist sunburn are offered. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. Tightly woven clothing, when worn loosely, shields effectively against the Sun. Keep in mind! Snow's reflective quality can nearly double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature in Curlew?
What is the average humidity in September?
How much does it rain in September?
When does it start to snow?
What is the average length of the day in September?
When is the sunrise / sunset in September?
How many hours of sunshine does Curlew have in September?
How high is the UV index in September?
Average temperature in September
Curlew, WA
- Average high temperature in September: 67.8°F
The warmest month (with the highest average high temperature) is August (79.2°F).
The month with the lowest average high temperature is December (27°F).
- Average low temperature in September: 42.8°F
The month with the highest average low temperature is August (49.5°F).
The coldest month (with the lowest average low temperature) is December (13.1°F).
Average pressure in September
Curlew, WA
- Average pressure in September: 29.98"Hg
The month with the highest atmospheric pressure is January (30.18"Hg).
The months with the lowest atmospheric pressure are June and August (29.93"Hg).
Average wind speed in September
Curlew, WA
- Average wind speed in September: 4.1mph
The windiest month (with the highest average wind speed) is April (4.5mph).
The calmest months (with the lowest average wind speed) are January, February and December (3.7mph).
Average humidity in September
Curlew, WA
- Average humidity in September: 60%
The month with the highest relative humidity is January (94%).
The month with the lowest relative humidity is August (49%).
Average rainfall in September
Curlew, WA
- Average rainfall in September: 1.1"
The wettest month (with the highest rainfall) is May (1.97").
The driest month (with the least rainfall) is August (0.47").
Average rainfall days in September
Curlew, WA
- Average rainfall days in September: 9.6 days
The month with the highest number of rainy days is May (13.8 days).
The month with the least rainy days is December (5.7 days).
Average snowfall in September
Curlew, WA
- Average snowfall in September: 2.09"
The month with the highest snowfall is December (9.76").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Curlew, WA
- Average snowfall days in September: 0.4 days
The month with the highest number of snowfall days is January (18.3 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Curlew, WA
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 16h and 6min).
The month with the shortest days is December (Average daylight: 8h and 18min).
- Average sunshine in September: 10h and 2min
The month with the most sunshine is August (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in September
Curlew, WA
- Average sunshine days in September: 18.5 days
The month with the most sunshine days is August (22.4 days).
The month with the least sunshine days is March (10.8 days).
Average UV index in September
Curlew, WA
- 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, November and December (UV index 1).
Average cloud cover in September
Curlew, WA
- Average cloud cover in September: 23
The month with the most cloud cover is January (Cloud cover 59).
The month with the least cloud cover is August (Cloud cover 14).
Average visibility in September
Curlew, WA
- Average visibility in September: 6mi
The months with the highest visibility are April, May, June, July, August and September (6mi).
The month with the lowest visibility is January (2mi).
Curlew, Washington, USA
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