September weather forecastRedmond, OR
September
Weather in September
September sees Redmond softly stepping into fall with a noticeable dip in temperatures. From the sultry heat of August, temperatures stands at an amicable 72°F (22.2°C) in September. The month brings back some rain and humidity but without weighing down the atmosphere. The city basks under modest sunlight, signaling the arrival of the fall season. Steady winds, mild temperatures, and colorful foliage make it a perfect month for trekking and enjoying autumnal hues.Temperature
The start of September involves a temperature drop, moving from a moderately hot 81°F (27.2°C) in August to a pleasant 72°F (22.2°C). The nighttime average for Redmond in September plummets considerably from its daytime counterpart, resting at a chilly 47.1°F (8.4°C).Humidity
The average relative humidity in September is 54%.Rainfall
In Redmond, in September, during 5.9 rainfall days, 0.63" (16mm) of precipitation is typically accumulated. In Redmond, during the entire year, the rain falls for 125.1 days and collects up to 12.48" (317mm) of precipitation.Snowfall
Months with snowfall are January through May, September through December. September is the first month it typically snows. Throughout September, in the average 0.3 snowfall days, it receives 0.08" (2mm) of snow. Throughout the year, there are 51.4 snowfall days, and 24.53" (623mm) of snow is accumulated.Daylight
The average length of the day in September is 12h and 29min.On the first day of the month, sunrise is at 6:28 am and sunset at 7:40 pm. On the last day of September, in Redmond, sunrise is at 7:02 am and sunset at 6:46 pm PDT.
Sunshine
In September, the average sunshine is 10.9h.UV index
In September, the average daily maximum UV index in Redmond is 3. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for the average person.Note: A maximum UV index of 3 in September translates into the following recommendations:
Undertake precautions - It is suggested to shield oneself from sunburn. Avoiding the Sun during its peak radiation time around midday is a healthy practice. Boost your sun resistance with garments that are densely woven yet spacious. Be advised! The UV radiation from the Sun can be almost doubled due to the reflective properties of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Redmond, OR
- Average high temperature in September: 72°F
The warmest month (with the highest average high temperature) is July (81.5°F).
The month with the lowest average high temperature is December (37°F).
- Average low temperature in September: 47.1°F
The month with the highest average low temperature is August (52.9°F).
The coldest month (with the lowest average low temperature) is December (25.7°F).
Average pressure in September
Redmond, OR
- Average pressure in September: 29.99"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is August (29.97"Hg).
Average wind speed in September
Redmond, OR
- Average wind speed in September: 5.2mph
The windiest months (with the highest average wind speed) are March and April (6.6mph).
The calmest months (with the lowest average wind speed) are August and September (5.2mph).
Average humidity in September
Redmond, OR
- Average humidity in September: 54%
The month with the highest relative humidity is December (81%).
The months with the lowest relative humidity are July and August (47%).
Average rainfall in September
Redmond, OR
- Average rainfall in September: 0.63"
The wettest month (with the highest rainfall) is December (1.73").
The driest month (with the least rainfall) is July (0.24").
Average rainfall days in September
Redmond, OR
- Average rainfall days in September: 5.9 days
The month with the highest number of rainy days is March (16.1 days).
The month with the least rainy days is July (3.3 days).
Average snowfall in September
Redmond, OR
- Average snowfall in September: 0.08"
The month with the highest snowfall is February (6.26").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Redmond, OR
- Average snowfall days in September: 0.3 days
The month with the highest number of snowfall days is December (12.1 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Redmond, OR
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in September: 10h and 54min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The months with the least sunshine are January and December (Average sunshine: 5h and 36min).
Average sunshine days in September
Redmond, OR
- Average sunshine days in September: 21.7 days
The month with the most sunshine days is July (25.4 days).
The month with the least sunshine days is March (10.2 days).
Average UV index in September
Redmond, 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
Redmond, OR
- Average cloud cover in September: 16
The month with the most cloud cover is December (Cloud cover 44).
The months with the least cloud cover are July and August (Cloud cover 10).
Average visibility in September
Redmond, OR
- Average visibility in September: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January and December (5mi).
