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 beginning of September brings a minor change in the average high-temperature, shifting from a moderately hot 80.2°F (26.8°C) in August to a pleasant 72.7°F (22.6°C). Dallas witnesses a consistent, sharp contrast from the daytime highs, with an average low-temperature of 49.3°F (9.6°C) throughout September.Humidity
In September, the average relative humidity is 74%.Rainfall
In Dallas, in September, during 8.8 rainfall days, 0.79" (20mm) of precipitation is typically accumulated. Throughout the year, in Dallas, there are 139.9 rainfall days, and 15.39" (391mm) of precipitation is accumulated.Snowfall
April through October are months without snowfall in Dallas, Oregon.Daylight
In Dallas, the average length of the day in September is 12h and 30min.On the first day of the month, sunrise is at 6:36 am and sunset at 7:49 pm. On the last day of September, sunrise is at 7:11 am and sunset at 6:54 pm PDT.
Sunshine
The average sunshine in September is 9.1h.UV index
In Dallas, the average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for the ordinary person.Note: A daily high UV index of 4 in September leads to these guidelines:
Be vigilant - Preventing sunburn is recommended. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.
Frequently asked questions
What is the usual temperature for Dallas in September?
What is the average humidity in September in Dallas?
How much does it rain in Dallas in September?
When it does not snow in Dallas?
How many hours of daylight does Dallas have in September?
When are sunrise and sunset in September in Dallas?
How many hours of sunshine does Dallas have in September?
What is the UV index intensity in September in Dallas?
Average temperature in September
Dallas, OR
- Average high temperature in September: 72.7°F
The warmest month (with the highest average high temperature) is August (80.2°F).
The month with the lowest average high temperature is December (44.2°F).
- Average low temperature in September: 49.3°F
The month with the highest average low temperature is August (52.3°F).
The coldest month (with the lowest average low temperature) is December (34°F).
Average pressure in September
Dallas, OR
- Average pressure in September: 30.01"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The months with the lowest atmospheric pressure are August and September (30.01"Hg).
Average wind speed in September
Dallas, OR
- Average wind speed in September: 4mph
The windiest month (with the highest average wind speed) is March (5mph).
The calmest month (with the lowest average wind speed) is August (3.9mph).
Average humidity in September
Dallas, OR
- Average humidity in September: 74%
The month with the highest relative humidity is December (89%).
The month with the lowest relative humidity is August (69%).
Average rainfall in September
Dallas, OR
- Average rainfall in September: 0.79"
The wettest month (with the highest rainfall) is December (2.4").
The driest month (with the least rainfall) is July (0.24").
Average rainfall days in September
Dallas, OR
- Average rainfall days in September: 8.8 days
The month with the highest number of rainy days is March (17.4 days).
The month with the least rainy days is August (3.9 days).
Average snowfall in September
Dallas, OR
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.18").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Dallas, OR
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1.5 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Dallas, OR
- Average daylight in September: 12h and 3min
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 48min).
- Average sunshine in September: 9h and 1min
The months with the most sunshine are July and August (Average sunshine: 10h and 48min).
The month with the least sunshine is February (Average sunshine: 3h and 42min).
Average sunshine days in September
Dallas, OR
- Average sunshine days in September: 19.4 days
The month with the most sunshine days is July (26.1 days).
The month with the least sunshine days is March (11.6 days).
Average UV index in September
Dallas, OR
- Average UV index in September: 4
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Dallas, OR
- Average cloud cover in September: 35
The month with the most cloud cover is February (Cloud cover 64).
The month with the least cloud cover is August (Cloud cover 25).
Average visibility in September
Dallas, OR
- Average visibility in September: 5mi
The months with the highest visibility are May, June, July, August, September and October (5mi).
The months with the lowest visibility are January, February, March, April, November and December (4mi).
Dallas, Oregon, USA
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