September weather forecastMazama, WA
September
Weather in September
The first month of the autumn, September, is still a comfortable month in Mazama, Washington, with an average temperature varying between 41.2°F (5.1°C) and 64.6°F (18.1°C).Temperature
September's arrival comes with a decrease in the average high-temperature, moving from a moderately hot 75.9°F (24.4°C) in August to an enjoyable 64.6°F (18.1°C). A striking difference from the daytime highs is registered during September nights, with an average temperature of 41.2°F (5.1°C).Humidity
In September, the average relative humidity in Mazama is 62%.Rainfall
In September, in Mazama, the rain falls for 9.7 days. Throughout September, 0.98" (25mm) of precipitation is accumulated. Throughout the year, there are 142.6 rainfall days, and 17.91" (455mm) of precipitation is accumulated.Snowfall
Months with snowfall in Mazama are January through April, September through December. September is the first month it typically snows. Throughout September, in the average 0.2 snowfall days, it receives 0.2" (5mm) of snow. Throughout the year, in Mazama, Washington, there are 66.9 snowfall days, and 43.98" (1117mm) of snow is accumulated.Daylight
The average length of the day in September is 12h and 34min.On the first day of the month, sunrise is at 6:20 am and sunset at 7:42 pm. On the last day of September, in Mazama, Washington, sunrise is at 7:00 am and sunset at 6:41 pm PDT.
Sunshine
In September, the average sunshine is 10.6h.UV index
The average daily maximum UV index in September is 3. A UV Index value of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for the ordinary person.Note: The maximum daily UV index, 3 in September, converts into the following recommendations:
Undertake precautions - It is suggested to shield oneself from sunburn. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration. Be vigilant! The reflective nature of snow can increase the Sun's UV radiation nearly twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Mazama, WA
- Average high temperature in September: 64.6°F
The warmest month (with the highest average high temperature) is August (75.9°F).
The month with the lowest average high temperature is December (27.5°F).
- Average low temperature in September: 41.2°F
The month with the highest average low temperature is August (47.8°F).
The coldest month (with the lowest average low temperature) is December (13.5°F).
Average pressure in September
Mazama, WA
- Average pressure in September: 29.98"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The months with the lowest atmospheric pressure are June and August (29.95"Hg).
Average wind speed in September
Mazama, WA
- Average wind speed in September: 4.6mph
The windiest months (with the highest average wind speed) are June and July (5mph).
The calmest months (with the lowest average wind speed) are January and December (3.6mph).
Average humidity in September
Mazama, WA
- Average humidity in September: 62%
The month with the highest relative humidity is January (93%).
The months with the lowest relative humidity are July and August (53%).
Average rainfall in September
Mazama, WA
- Average rainfall in September: 0.98"
The wettest month (with the highest rainfall) is December (2.48").
The driest month (with the least rainfall) is July (0.31").
Average rainfall days in September
Mazama, WA
- Average rainfall days in September: 9.7 days
The month with the highest number of rainy days is March (17.3 days).
The month with the least rainy days is August (6.1 days).
Average snowfall in September
Mazama, WA
- Average snowfall in September: 0.2"
The month with the highest snowfall is December (12.87").
The months with the least snowfall are May, June, July and August (0").
Average snowfall days in September
Mazama, WA
- Average snowfall days in September: 0.2 days
The month with the highest number of snowfall days is December (15.3 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Mazama, WA
- Average daylight in September: 12h and 36min
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 24min).
- Average sunshine in September: 10h and 36min
The month with the most sunshine is August (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in September
Mazama, WA
- Average sunshine days in September: 18.1 days
The month with the most sunshine days is August (23 days).
The month with the least sunshine days is March (8.3 days).
Average UV index in September
Mazama, 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 and November (UV index 1).
Average cloud cover in September
Mazama, WA
- Average cloud cover in September: 23
The month with the most cloud cover is January (Cloud cover 55).
The month with the least cloud cover is August (Cloud cover 15).
Average visibility in September
Mazama, WA
- Average visibility in September: 6mi
The months with the highest visibility are May, June, July, August, September and October (6mi).
The months with the lowest visibility are January and February (3mi).
