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 transition to September results in a modest reduction in average high-temperature, moving from 82.8°F (28.2°C) in August to a still moderately hot 74.1°F (23.4°C). Compared to daytime temperatures, Dairy's temperature drops significantly, averaging a frosty 44.1°F (6.7°C) during the nights of September.Humidity
In September, the average relative humidity is 51%.Rainfall
In Dairy, in September, it is raining for 4 days, with typically 0.39" (10mm) of accumulated precipitation. Throughout the year, there are 97.4 rainfall days, and 12.01" (305mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through June, September through December. September is the first month it typically snows in Dairy. Throughout September, in the average 0.2 snowfall days, it receives 0.08" (2mm) of snow. Throughout the year, there are 64.6 snowfall days, and 38.31" (973mm) of snow is accumulated.Daylight
In September, the average length of the day is 12h and 28min.On the first day of the month, sunrise is at 6:32 am and sunset at 7:39 pm. On the last day of September, sunrise is at 7:02 am and sunset at 6:48 pm PDT.
Sunshine
In September, the average sunshine is 11.1h.UV index
In Dairy, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for the average person.Note: A maximum high UV index of 4 in September translates into the following recommendations:
Undertake protective steps - Recommendations to avoid sunburn are issued. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. Experience reduced UV exposure by about half when donning a wide-brim hat. Take warning! The intensity of the Sun's UV radiation can be nearly amplified twice due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Dairy in September?
What is the average humidity in September?
How much does it rain in September?
When does it start to snow?
How many hours of daylight does Dairy have in September?
What time are sunrise and sunset in September?
How many hours of sunshine does Dairy have in September?
How high is the UV index in September?
Average temperature in September
Dairy, OR
- Average high temperature in September: 74.1°F
The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is December (37.2°F).
- Average low temperature in September: 44.1°F
The month with the highest average low temperature is August (49.3°F).
The coldest month (with the lowest average low temperature) is December (25°F).
Average pressure in September
Dairy, OR
- Average pressure in September: 29.98"Hg
The month with the highest atmospheric pressure is January (30.18"Hg).
The months with the lowest atmospheric pressure are June, July and August (29.96"Hg).
Average wind speed in September
Dairy, OR
- Average wind speed in September: 5.1mph
The windiest month (with the highest average wind speed) is March (6.5mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity in September
Dairy, OR
- Average humidity in September: 51%
The month with the highest relative humidity is January (83%).
The month with the lowest relative humidity is August (47%).
Average rainfall in September
Dairy, OR
- Average rainfall in September: 0.39"
The wettest month (with the highest rainfall) is December (1.97").
The driest month (with the least rainfall) is July (0.16").
Average rainfall days in September
Dairy, OR
- Average rainfall days in September: 4 days
The month with the highest number of rainy days is March (12.5 days).
The month with the least rainy days is August (3.1 days).
Average snowfall in September
Dairy, OR
- Average snowfall in September: 0.08"
The month with the highest snowfall is December (9.57").
The months with the least snowfall are July and August (0").
Average snowfall days in September
Dairy, OR
- Average snowfall days in September: 0.2 days
The month with the highest number of snowfall days is December (13.4 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Dairy, OR
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in September: 11h and 1min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is January (Average sunshine: 5h and 24min).
Average sunshine days in September
Dairy, OR
- Average sunshine days in September: 24.8 days
The month with the most sunshine days is August (25.7 days).
The month with the least sunshine days is March (11.5 days).
Average UV index in September
Dairy, OR
- Average UV index in September: 4
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
Dairy, OR
- Average cloud cover in September: 14
The months with the most cloud cover are March and December (Cloud cover 44).
The months with the least cloud cover are July and August (Cloud cover 8).
Average visibility in September
Dairy, OR
- Average visibility in September: 6mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is January (4mi).
Dairy, Oregon, USA
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