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 arrival of September indicates a decrease in the average high-temperature, moving from a moderately hot 79.2°F (26.2°C) in August to a comfortable 67.8°F (19.9°C). A significant drop from the day's peak to an average low-temperature of 42.8°F (6°C) is noted during the nights in September.Humidity
In September, the average relative humidity is 60%.Rainfall
In September, the rain falls for 9.6 days. Throughout September, 1.1" (28mm) of precipitation is accumulated. Throughout the year, there are 112.2 rainfall days, and 14.69" (373mm) of precipitation is accumulated.Snowfall
January through May, September through December are months with snowfall. September is the first month it typically snows in Chesaw. Throughout September, in the average 0.4 snowfall days, it receives 2.09" (53mm) of snow. In Chesaw, Washington, during the entire year, snow falls for 89.6 days and aggregates up to 47.44" (1205mm) of snow.Daylight
In Chesaw, Washington, the average length of the day in September is 12h and 34min.On the first day of September in Chesaw, Washington, sunrise is at 6:14 am and sunset at 7:37 pm. On the last day of the month, sunrise is at 6:55 am and sunset at 6:36 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 estimate of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for the average person.Note: An average maximum UV index of 3 in September leads to these recommendations:
Prioritize safety - Recommendations to avert sunburn are shared. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage. On your guard! Snow's reflection can almost double the intensity of the Sun's UV radiation.
Frequently asked questions
What are the temperatures in Chesaw in September?
What is the average humidity in September in Chesaw?
How many days does it rain in September in Chesaw?
When does it start to snow in Chesaw?
What is the average length of the day in September in Chesaw?
When is the sunrise / sunset in September in Chesaw?
How long on average sun shines in September in Chesaw?
What is the UV index intensity in September in Chesaw?
Average temperature in September
Chesaw, 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
Chesaw, 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
Chesaw, 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
Chesaw, 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
Chesaw, 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
Chesaw, 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
Chesaw, 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
Chesaw, 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
Chesaw, 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
Chesaw, 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
Chesaw, 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
Chesaw, 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
Chesaw, 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).
Chesaw, Washington, USA
Weather forecast for your location
2. Allow the app to use your location
