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 shift from August to September corresponds with a decrease in the average high-temperature, down to a comfortable 67.5°F (19.7°C) from a warm 76.5°F (24.7°C). Warrendale experiences a consistent, yet significant, drop from daily highs to a low-temperature of 45.7°F (7.6°C) throughout September.Humidity
The average relative humidity in September is 72%.Rainfall
In Warrendale, in September, during 8.4 rainfall days, 1.1" (28mm) of precipitation is typically accumulated. In Warrendale, during the entire year, the rain falls for 158.4 days and collects up to 30.31" (770mm) of precipitation.Snowfall
In Warrendale, snow does not fall in April through October.Daylight
In September, the average length of the day in Warrendale is 12h and 31min.On the first day of the month, sunrise is at 6:30 am and sunset at 7:45 pm. On the last day of September, in Warrendale, sunrise is at 7:06 am and sunset at 6:49 pm PDT.
Sunshine
In Warrendale, Oregon, the average sunshine in September is 8.7h.UV index
In September, the average daily maximum UV index in Warrendale is 3. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for average individuals.Note: The daily maximum UV index of 3 in September interprets into the following advice:
Take care. Persons with lighter skin might suffer burns in less than 30 minutes. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly.
Frequently asked questions
What is the usual temperature for Warrendale in September?
What is the average humidity in September in Warrendale?
How many days does it rain in September in Warrendale?
When it does not snow in Warrendale?
What is the average length of the day in September in Warrendale?
When are sunrise and sunset in September in Warrendale?
How long on average sun shines in September in Warrendale?
How high is the UV index in September in Warrendale?
Average temperature in September
Warrendale, OR
- Average high temperature in September: 67.5°F
The warmest month (with the highest average high temperature) is August (76.5°F).
The month with the lowest average high temperature is December (37.9°F).
- Average low temperature in September: 45.7°F
The month with the highest average low temperature is August (48.7°F).
The coldest month (with the lowest average low temperature) is December (28.2°F).
Average pressure in September
Warrendale, OR
- Average pressure in September: 30"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is August (29.98"Hg).
Average wind speed in September
Warrendale, OR
- Average wind speed in September: 4.5mph
The windiest month (with the highest average wind speed) is January (6.8mph).
The calmest month (with the lowest average wind speed) is August (4.2mph).
Average humidity in September
Warrendale, OR
- Average humidity in September: 72%
The month with the highest relative humidity is February (89%).
The months with the lowest relative humidity are July and August (67%).
Average rainfall in September
Warrendale, OR
- Average rainfall in September: 1.1"
The wettest month (with the highest rainfall) is January (5.35").
The driest month (with the least rainfall) is July (0.28").
Average rainfall days in September
Warrendale, OR
- Average rainfall days in September: 8.4 days
The month with the highest number of rainy days is March (18.9 days).
The month with the least rainy days is July (4.4 days).
Average snowfall in September
Warrendale, OR
- Average snowfall in September: 0"
The month with the highest snowfall is January (3.62").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Warrendale, OR
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (3.8 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Warrendale, 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 4min
The months with the most sunshine are July and August (Average sunshine: 10h and 54min).
The month with the least sunshine is February (Average sunshine: 3h and 12min).
Average sunshine days in September
Warrendale, OR
- Average sunshine days in September: 20.1 days
The month with the most sunshine days is July (24.5 days).
The month with the least sunshine days is February (9.4 days).
Average UV index in September
Warrendale, OR
- Average UV index in September: 3
The months with the highest UV index are June and July (UV index 5).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in September
Warrendale, OR
- Average cloud cover in September: 39
The month with the most cloud cover is February (Cloud cover 68).
The months with the least cloud cover are July and August (Cloud cover 26).
Average visibility in September
Warrendale, 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).
Warrendale, Oregon, USA
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