September weather forecastDunsmuir, CA
September
Weather in September
September, the first month of the autumn in Dunsmuir, is still a warm month, with temperature in the range of an average high of 77.5°F (25.3°C) and an average low of 46.6°F (8.1°C).Temperature
The shift from August to September coincides with a small decrease in the average high-temperature, down to a still moderately hot 77.5°F (25.3°C) from a warm 85.1°F (29.5°C). Despite soaring daytime temperatures, Dunsmuir registers a consistent average low-temperature of 46.6°F (8.1°C) in September.Humidity
In Dunsmuir, the average relative humidity in September is 49%.Rainfall
In Dunsmuir, in September, during 4.3 rainfall days, 0.31" (8mm) of precipitation is typically accumulated. Throughout the year, in Dunsmuir, California, there are 102.5 rainfall days, and 12.56" (319mm) of precipitation is accumulated.Snowfall
In Dunsmuir, California, snow does not fall in May through September.Daylight
In Dunsmuir, the average length of the day in September is 12h and 27min.On the first day of September, sunrise is at 6:36 am and sunset at 7:41 pm. On the last day of the month, sunrise is at 7:05 am and sunset at 6:51 pm PDT.
Sunshine
The average sunshine in September is 11.1h.UV index
In September, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for average individuals.Note: During September, 4 as the daily maximum UV index converts into the following advice:
Exercise caution. Those with pale skin may experience burns in less than half an hour. Avoiding the Sun during its peak radiation time around midday is a healthy practice. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Dunsmuir, CA
- Average high temperature in September: 77.5°F
The warmest month (with the highest average high temperature) is July (86°F).
The month with the lowest average high temperature is December (42.3°F).
- Average low temperature in September: 46.6°F
The month with the highest average low temperature is July (52.2°F).
The coldest month (with the lowest average low temperature) is December (27.7°F).
Average pressure in September
Dunsmuir, CA
- Average pressure in September: 29.96"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is August (29.93"Hg).
Average wind speed in September
Dunsmuir, CA
- Average wind speed in September: 4.7mph
The windiest month (with the highest average wind speed) is March (5.7mph).
The calmest month (with the lowest average wind speed) is August (4.1mph).
Average humidity in September
Dunsmuir, CA
- Average humidity in September: 49%
The month with the highest relative humidity is March (81%).
The month with the lowest relative humidity is August (44%).
Average rainfall in September
Dunsmuir, CA
- Average rainfall in September: 0.31"
The wettest month (with the highest rainfall) is January (2.01").
The driest months (with the least rainfall) are July and August (0.24").
Average rainfall days in September
Dunsmuir, CA
- Average rainfall days in September: 4.3 days
The month with the highest number of rainy days is March (15.2 days).
The month with the least rainy days is August (2.5 days).
Average snowfall in September
Dunsmuir, CA
- Average snowfall in September: 0"
The month with the highest snowfall is January (4.45").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Dunsmuir, CA
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is February (5.5 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Dunsmuir, CA
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in September: 11h and 6min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 12min).
Average sunshine days in September
Dunsmuir, CA
- Average sunshine days in September: 24.2 days
The month with the most sunshine days is August (24.7 days).
The month with the least sunshine days is March (11.4 days).
Average UV index in September
Dunsmuir, CA
- Average UV index in September: 4
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in September
Dunsmuir, CA
- Average cloud cover in September: 11
The month with the most cloud cover is March (Cloud cover 47).
The month with the least cloud cover is August (Cloud cover 6).
Average visibility in September
Dunsmuir, CA
- Average visibility in September: 6mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February, March and December (5mi).
