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
Yamhill's progression into September involves a gentle drop in the average high-temperature, from a moderately hot 79.9°F (26.6°C) in August to a pleasant 72.5°F (22.5°C). Despite a noticeable differential from daytime highs, Yamhill notes an average nighttime low-temperature of 50.2°F (10.1°C) in September.Humidity
In Yamhill, Oregon, the average relative humidity in September is 73%.Rainfall
In September, the rain falls for 11.6 days. Throughout September, 1.38" (35mm) of precipitation is accumulated. Throughout the year, there are 186.2 rainfall days, and 27.05" (687mm) of precipitation is accumulated.Snowfall
In Yamhill, snow does not fall in April through October.Daylight
In September, the average length of the day is 12h and 31min.On the first day of September, sunrise is at 6:35 am and sunset at 7:49 pm. On the last day of the month, sunrise is at 7:10 am and sunset at 6:54 pm PDT.
Sunshine
In Yamhill, the average sunshine in September is 8.9h.UV index
The average daily maximum UV index in September in Yamhill is 4. A UV Index of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for average individuals.Note: In September, the maximum UV index of 4 suggests these recommendations:
Guard yourself - Avoiding sunburn is suggested. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
Frequently asked questions
What is the average September temperature in Yamhill?
What is the average humidity in September in Yamhill?
How much does it rain in Yamhill in September?
When it does not snow in Yamhill?
How many hours of daylight does Yamhill have in September?
When are sunrise and sunset in September in Yamhill?
How many hours of sunshine does Yamhill have in September?
What is the UV index reading in September in Yamhill?
Average temperature in September
Yamhill, OR
- Average high temperature in September: 72.5°F
The warmest month (with the highest average high temperature) is August (79.9°F).
The month with the lowest average high temperature is December (43.7°F).
- Average low temperature in September: 50.2°F
The month with the highest average low temperature is August (53.6°F).
The coldest month (with the lowest average low temperature) is December (33.6°F).
Average pressure in September
Yamhill, OR
- Average pressure in September: 30.01"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The months with the lowest atmospheric pressure are August and September (30.01"Hg).
Average wind speed in September
Yamhill, OR
- Average wind speed in September: 4mph
The windiest month (with the highest average wind speed) is March (5.1mph).
The calmest months (with the lowest average wind speed) are August and September (4mph).
Average humidity in September
Yamhill, OR
- Average humidity in September: 73%
The months with the highest relative humidity are January, February, November and December (87%).
The month with the lowest relative humidity is August (68%).
Average rainfall in September
Yamhill, OR
- Average rainfall in September: 1.38"
The wettest month (with the highest rainfall) is December (3.9").
The driest month (with the least rainfall) is August (0.39").
Average rainfall days in September
Yamhill, OR
- Average rainfall days in September: 11.6 days
The month with the highest number of rainy days is March (21.9 days).
The months with the least rainy days are July and August (6.3 days).
Average snowfall in September
Yamhill, OR
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.91").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Yamhill, OR
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2 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
Yamhill, 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: 8h and 5min
The month with the most sunshine is August (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 3h and 48min).
Average sunshine days in September
Yamhill, OR
- Average sunshine days in September: 15.9 days
The month with the most sunshine days is July (22.3 days).
The month with the least sunshine days is March (7.4 days).
Average UV index in September
Yamhill, 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, November and December (UV index 2).
Average cloud cover in September
Yamhill, OR
- Average cloud cover in September: 35
The month with the most cloud cover is February (Cloud cover 63).
The month with the least cloud cover is August (Cloud cover 25).
Average visibility in September
Yamhill, OR
- Average visibility in September: 6mi
The months with the highest visibility are July, August and September (6mi).
The months with the lowest visibility are January, February, November and December (4mi).
Yamhill, Oregon, USA
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