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 corresponds with a minor reduction in the average high-temperature, down from August's warm 76.5°F (24.7°C) to a pleasant 68.4°F (20.2°C). Against the high September temperatures, Chemult records an average drop to a wintry 41.9°F (5.5°C) at night.Humidity
In Chemult, the average relative humidity in September is 63%.Rainfall
In September, the rain falls for 7.3 days. Throughout September, 1.18" (30mm) of precipitation is accumulated. In Chemult, during the entire year, the rain falls for 105.2 days and collects up to 35.83" (910mm) of precipitation.Snowfall
January through June, September through December are months with snowfall. September is the first month it typically snows. Throughout September, in the average 1.7 snowfall days, it receives 1.65" (42mm) of snow. Throughout the year, in Chemult, there are 133.8 snowfall days, and 206.73" (5251mm) of snow is accumulated.Daylight
In Chemult, the average length of the day in September is 12h and 29min.On the first day of September, sunrise is at 6:32 am and sunset at 7:41 pm. On the last day of the month, sunrise is at 7:04 am and sunset at 6:49 pm PDT.
Sunshine
In September, the average sunshine is 10.4h.UV index
The average daily maximum UV index in September is 3. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for the ordinary person.Note: A maximum UV index of 3 in September translates into the following recommendations:
Prioritize safety - Recommendations to avert sunburn are shared. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. Boost your sun resistance with garments that are densely woven yet spacious. Be on the lookout! Nearly twofold UV radiation from the Sun can be reflected by snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Chemult in September?
What is the average humidity in September?
How many days does it rain in September?
When does it start snowing?
What is the average length of the day in September?
What time are sunrise and sunset in September?
How long on average sun shines in September?
What is the UV index reading in September?
Average temperature in September
Chemult, OR
- Average high temperature in September: 68.4°F
The warmest months (with the highest average high temperature) are July and August (76.5°F).
The month with the lowest average high temperature is December (35.4°F).
- Average low temperature in September: 41.9°F
The month with the highest average low temperature is August (46.4°F).
The coldest month (with the lowest average low temperature) is December (23.5°F).
Average pressure in September
Chemult, OR
- Average pressure in September: 30"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is August (29.98"Hg).
Average wind speed in September
Chemult, OR
- Average wind speed in September: 4.5mph
The windiest month (with the highest average wind speed) is January (6mph).
The calmest month (with the lowest average wind speed) is August (4.3mph).
Average humidity in September
Chemult, OR
- Average humidity in September: 63%
The months with the highest relative humidity are February and March (88%).
The months with the lowest relative humidity are July and August (59%).
Average rainfall in September
Chemult, OR
- Average rainfall in September: 1.18"
The wettest month (with the highest rainfall) is January (5.55").
The driest month (with the least rainfall) is July (0.39").
Average rainfall days in September
Chemult, OR
- Average rainfall days in September: 7.3 days
The month with the highest number of rainy days is May (14.3 days).
The month with the least rainy days is July (4.6 days).
Average snowfall in September
Chemult, OR
- Average snowfall in September: 1.65"
The months with the highest snowfall are January and December (39.21").
The months with the least snowfall are July and August (0").
Average snowfall days in September
Chemult, OR
- Average snowfall days in September: 1.7 days
The month with the highest number of snowfall days is March (21.8 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Chemult, OR
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in September: 10h and 2min
The month with the most sunshine is July (Average sunshine: 11h and 54min).
The months with the least sunshine are January and December (Average sunshine: 4h and 30min).
Average sunshine days in September
Chemult, OR
- Average sunshine days in September: 19.7 days
The month with the most sunshine days is July (23.6 days).
The month with the least sunshine days is March (7.4 days).
Average UV index in September
Chemult, OR
- Average UV index in September: 3
The month with the highest UV index is July (UV index 5).
The month with the lowest UV index is February (UV index 1).
Average cloud cover in September
Chemult, OR
- Average cloud cover in September: 25
The month with the most cloud cover is March (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 14).
Average visibility in September
Chemult, OR
- Average visibility in September: 6mi
The months with the highest visibility are July, August and September (6mi).
The months with the lowest visibility are January, February, March, April, November and December (4mi).
Chemult, Oregon, USA
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