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
Stepping into September, Mission observes a temperature decline, with the average high falling from August's 84°F (28.9°C) to a still moderately hot 74.1°F (23.4°C). In Mission, September nights witness a steady temperature drop to a cool 54.7°F (12.6°C).Humidity
The average relative humidity in September in Mission is 46%.Rainfall
In Mission, in September, during 7 rainfall days, 0.51" (13mm) of precipitation is typically accumulated. In Mission, during the entire year, the rain falls for 132.7 days and collects up to 12.91" (328mm) of precipitation.Snowfall
Months with snowfall are January through April, September, November and December. September is the first month it typically snows. Throughout September, in the average 0.1 snowfall days, it receives 0.08" (2mm) of snow. Throughout the year, in Mission, there are 17.5 snowfall days, and 9.41" (239mm) of snow is accumulated.Daylight
The average length of the day in September is 12h and 31min.On the first day of September, sunrise is at 6:16 am and sunset at 7:31 pm. On the last day of the month, sunrise is at 6:52 am and sunset at 6:36 pm PDT.
Sunshine
The average sunshine in September in Mission is 10.6h.UV index
The average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for average individuals.Note: In September, the maximum UV index of 4 suggests these recommendations:
Be vigilant - A duty to shield skin and eyes from injury exists. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit. Be prepared! The intensity of the Sun's UV radiation can be amplified nearly double due to snow reflection.
Frequently asked questions
What is the usual temperature for Mission in September?
What is the average humidity in September in Mission?
How many days does it rain in September in Mission?
When does it start snowing in Mission?
What is the average length of the day in September in Mission?
What time are sunrise and sunset in September in Mission?
How long on average sun shines in September in Mission?
How high is the UV index in September in Mission?
Average temperature in September
Mission, OR
- Average high temperature in September: 74.1°F
The warmest month (with the highest average high temperature) is July (84.4°F).
The month with the lowest average high temperature is December (37.9°F).
- Average low temperature in September: 54.7°F
The month with the highest average low temperature is August (61.7°F).
The coldest month (with the lowest average low temperature) is December (27.3°F).
Average pressure in September
Mission, OR
- Average pressure in September: 29.96"Hg
The month with the highest atmospheric pressure is January (30.2"Hg).
The month with the lowest atmospheric pressure is August (29.91"Hg).
Average wind speed in September
Mission, OR
- Average wind speed in September: 6.2mph
The windiest month (with the highest average wind speed) is April (8.3mph).
The calmest month (with the lowest average wind speed) is September (6.2mph).
Average humidity in September
Mission, OR
- Average humidity in September: 46%
The month with the highest relative humidity is January (79%).
The month with the lowest relative humidity is August (38%).
Average rainfall in September
Mission, OR
- Average rainfall in September: 0.51"
The wettest month (with the highest rainfall) is March (1.65").
The driest month (with the least rainfall) is July (0.24").
Average rainfall days in September
Mission, OR
- Average rainfall days in September: 7 days
The month with the highest number of rainy days is March (17.1 days).
The month with the least rainy days is August (3.6 days).
Average snowfall in September
Mission, OR
- Average snowfall in September: 0.08"
The month with the highest snowfall is February (3.62").
The months with the least snowfall are May, June, July, August and October (0").
Average snowfall days in September
Mission, OR
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is December (5.5 days).
The months with the least snowfall days are May, June, July, August and October (0 days).
Average daylight in September /
Average sunshine in September
Mission, OR
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in September: 10h and 4min
The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The months with the least sunshine are January and December (Average sunshine: 5h and 24min).
Average sunshine days in September
Mission, OR
- Average sunshine days in September: 21.1 days
The month with the most sunshine days is July (24.4 days).
The month with the least sunshine days is March (11.7 days).
Average UV index in September
Mission, OR
- Average UV index in September: 4
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Mission, OR
- Average cloud cover in September: 16
The month with the most cloud cover is February (Cloud cover 44).
The month with the least cloud cover is August (Cloud cover 9).
Average visibility in September
Mission, OR
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Mission, Oregon, USA
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