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
As August transitions into September, Rivergrove sees a gentle drop in the average high-temperature, transitioning from a moderately hot 82°F (27.8°C) to a still warm 74.3°F (23.5°C). Rivergrove experiences a significant downturn from peak daytime temperatures throughout September, with the average low-temperature dipping to a cool 52°F (11.1°C).Humidity
In Rivergrove, the average relative humidity in September is 69%.Rainfall
In Rivergrove, during September, the rain falls for 10.8 days and regularly aggregates up to 1.57" (40mm) of precipitation. In Rivergrove, Oregon, during the entire year, the rain falls for 170.9 days and collects up to 30.67" (779mm) of precipitation.Snowfall
In Rivergrove, Oregon, snow does not fall in April through October.Daylight
In Rivergrove, the average length of the day in September is 12h and 31min.On the first day of September, sunrise is at 6:33 am and sunset at 7:47 pm. On the last day of the month, sunrise is at 7:08 am and sunset at 6:52 pm PDT.
Sunshine
The average sunshine in September in Rivergrove is 9.3h.UV index
In September, the average daily maximum UV index in Rivergrove is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for the ordinary person.Note: In September, a daily UV index of 4 turns into the following recommendations:
Take necessary precautions - Defending against sun damage is advocated. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.
Frequently asked questions
What are the temperatures in Rivergrove in September?
What is the average humidity in September in Rivergrove?
How many days does it rain in September in Rivergrove?
When it does not snow in Rivergrove?
How many hours of daylight does Rivergrove have in September?
When are sunrise and sunset in September in Rivergrove?
How long on average sun shines in September in Rivergrove?
What is the UV index intensity in September in Rivergrove?
Average temperature in September
Rivergrove, OR
- Average high temperature in September: 74.3°F
The warmest month (with the highest average high temperature) is August (82°F).
The month with the lowest average high temperature is December (44.1°F).
- Average low temperature in September: 52°F
The month with the highest average low temperature is August (55°F).
The coldest month (with the lowest average low temperature) is December (34.5°F).
Average pressure in September
Rivergrove, 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
Rivergrove, OR
- Average wind speed in September: 4mph
The windiest month (with the highest average wind speed) is January (5.5mph).
The calmest month (with the lowest average wind speed) is August (3.9mph).
Average humidity in September
Rivergrove, OR
- Average humidity in September: 69%
The months with the highest relative humidity are January, February and December (84%).
The month with the lowest relative humidity is August (63%).
Average rainfall in September
Rivergrove, OR
- Average rainfall in September: 1.57"
The wettest month (with the highest rainfall) is December (4.57").
The driest month (with the least rainfall) is July (0.31").
Average rainfall days in September
Rivergrove, OR
- Average rainfall days in September: 10.8 days
The month with the highest number of rainy days is March (19.8 days).
The month with the least rainy days is August (4.8 days).
Average snowfall in September
Rivergrove, OR
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.57").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Rivergrove, OR
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.3 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
Rivergrove, 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: 9h and 2min
The month with the most sunshine is August (Average sunshine: 11h and 0min).
The month with the least sunshine is February (Average sunshine: 4h and 6min).
Average sunshine days in September
Rivergrove, OR
- Average sunshine days in September: 18 days
The month with the most sunshine days is July (25 days).
The month with the least sunshine days is February (8.6 days).
Average UV index in September
Rivergrove, 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
Rivergrove, OR
- Average cloud cover in September: 32
The month with the most cloud cover is February (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 22).
Average visibility in September
Rivergrove, 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, March, April, May, June, October, November and December (5mi).
Rivergrove, Oregon, USA
Weather forecast for your location
2. Allow the app to use your location
