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
Transitioning from August to September involves a subtle drop in average high-temperatures, descending from a warm 78.4°F (25.8°C) to an agreeable 69.8°F (21°C). Summer Lake documents a striking divergence from daytime highs, with an average nighttime temperature of 45.9°F (7.7°C) in September.Humidity
In Summer Lake, the average relative humidity in September is 53%.Rainfall
In Summer Lake, in September, during 5.4 rainfall days, 0.63" (16mm) of precipitation is typically accumulated. Throughout the year, there are 91.4 rainfall days, and 15.67" (398mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through June, September through December. September is the first month it typically snows. Throughout September, in the average 0.7 snowfall days, it receives 0.75" (19mm) of snow. Throughout the year, there are 95 snowfall days, and 73.15" (1858mm) of snow is accumulated.Daylight
In Summer Lake, the average length of the day in September is 12h and 28min.On the first day of September, sunrise is at 6:28 am and sunset at 7:36 pm. On the last day of the month, sunrise is at 7:00 am and sunset at 6:45 pm PDT.
Sunshine
In Summer Lake, the average sunshine in September is 11h.UV index
In Summer Lake, the average daily maximum UV index in September is 3. A UV Index value of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for ordinary individuals.Note: In September, an average UV index of 3 transforms into the following instructions:
Ensure safety - Sun damage prevention is strongly urged. The Sun's radiation is especially intense around midday; try to stay in shade during this period. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat. Pay attention! The reflection of snow can enhance the Sun's UV radiation almost double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures?
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 in Summer Lake?
What time are sunrise and sunset in September?
How long on average sun shines in September?
What is the UV index intensity in September?
Average temperature in September
Summer Lake, OR
- Average high temperature in September: 69.8°F
The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is December (34.5°F).
- Average low temperature in September: 45.9°F
The month with the highest average low temperature is August (52.2°F).
The coldest month (with the lowest average low temperature) is December (23.7°F).
Average pressure in September
Summer Lake, OR
- Average pressure in September: 29.99"Hg
The month with the highest atmospheric pressure is January (30.18"Hg).
The month with the lowest atmospheric pressure is August (29.97"Hg).
Average wind speed in September
Summer Lake, OR
- Average wind speed in September: 5.7mph
The windiest month (with the highest average wind speed) is March (7.7mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).
Average humidity in September
Summer Lake, OR
- Average humidity in September: 53%
The month with the highest relative humidity is December (82%).
The month with the lowest relative humidity is July (45%).
Average rainfall in September
Summer Lake, OR
- Average rainfall in September: 0.63"
The wettest month (with the highest rainfall) is February (2.13").
The driest month (with the least rainfall) is July (0.2").
Average rainfall days in September
Summer Lake, OR
- Average rainfall days in September: 5.4 days
The month with the highest number of rainy days is May (12.8 days).
The month with the least rainy days is July (3.3 days).
Average snowfall in September
Summer Lake, OR
- Average snowfall in September: 0.75"
The month with the highest snowfall is February (16.06").
The months with the least snowfall are July and August (0").
Average snowfall days in September
Summer Lake, OR
- Average snowfall days in September: 0.7 days
The month with the highest number of snowfall days is December (16.8 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Summer Lake, 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 6min).
- Average sunshine in September: 11h and 0min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The months with the least sunshine are January and December (Average sunshine: 5h and 36min).
Average sunshine days in September
Summer Lake, OR
- Average sunshine days in September: 22 days
The month with the most sunshine days is July (25.1 days).
The month with the least sunshine days is March (11.1 days).
Average UV index in September
Summer Lake, OR
- 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, March, November and December (UV index 2).
Average cloud cover in September
Summer Lake, OR
- Average cloud cover in September: 17
The months with the most cloud cover are February and December (Cloud cover 45).
The months with the least cloud cover are July and August (Cloud cover 9).
Average visibility in September
Summer Lake, OR
- Average visibility in September: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February and December (5mi).
Summer Lake, Oregon, USA
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