September weather forecastWarrenton, OR
September
Weather in September
The first month of the autumn, September, is still a comfortable month in Warrenton, Oregon, with an average temperature varying between 53.2°F (11.8°C) and 64°F (17.8°C).Temperature
The transition from August to September sees average high-temperatures adjusting to a still refreshing 64°F (17.8°C), from a not significantly different 65.8°F (18.8°C). Nighttime temperature experiences an average drop to a fresh 53.2°F (11.8°C) in September.Humidity
In September, the average relative humidity is 83%.Rainfall
In September, the rain falls for 11.6 days. Throughout September, 1.81" (46mm) of precipitation is accumulated. In Warrenton, during the entire year, the rain falls for 191.4 days and collects up to 40.39" (1026mm) of precipitation.Snowfall
January through March, September and December are months with snowfall. September is the first month it typically snows. Throughout September, in the average 0.1 snowfall days, it receives 0.04" (1mm) of snow. In Warrenton, during the entire year, snow falls for 3.3 days and aggregates up to 1.54" (39mm) of snow.Daylight
In Warrenton, the average length of the day in September is 12h and 31min.On the first day of September, sunrise is at 6:37 am and sunset at 7:53 pm. On the last day of the month, sunrise is at 7:13 am and sunset at 6:56 pm PDT.
Sunshine
In September, the average sunshine in Warrenton is 8.8h.UV index
In September, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for the average person.Note: A daily high UV index of 4 in September leads to these guidelines:
Take necessary precautions - Suggestions to elude sunburn are provided. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. To cut down UV radiation exposure by about half, sport a wide-brim hat. Take heed! Reflection from the snow can almost amplify the Sun's UV radiation by double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Warrenton, OR
- Average high temperature in September: 64°F
The warmest month (with the highest average high temperature) is August (65.8°F).
The month with the lowest average high temperature is December (45.5°F).
- Average low temperature in September: 53.2°F
The month with the highest average low temperature is August (54.5°F).
The coldest months (with the lowest average low temperature) are February and December (39.9°F).
Average pressure in September
Warrenton, OR
- Average pressure in September: 30.02"Hg
The month with the highest atmospheric pressure is January (30.08"Hg).
The months with the lowest atmospheric pressure are March and September (30.02"Hg).
Average wind speed in September
Warrenton, OR
- Average wind speed in September: 6.7mph
The windiest month (with the highest average wind speed) is January (10.2mph).
The calmest month (with the lowest average wind speed) is August (5.9mph).
Average humidity in September
Warrenton, OR
- Average humidity in September: 83%
The month with the highest relative humidity is August (84%).
The month with the lowest relative humidity is May (81%).
Average rainfall in September
Warrenton, OR
- Average rainfall in September: 1.81"
The wettest month (with the highest rainfall) is December (6.54").
The driest month (with the least rainfall) is July (0.51").
Average rainfall days in September
Warrenton, OR
- Average rainfall days in September: 11.6 days
The month with the highest number of rainy days is March (21.2 days).
The month with the least rainy days is August (7.1 days).
Average snowfall in September
Warrenton, OR
- Average snowfall in September: 0.04"
The month with the highest snowfall is February (0.79").
The months with the least snowfall are April, May, June, July, August, October and November (0").
Average snowfall days in September
Warrenton, OR
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is February (1.3 days).
The months with the least snowfall days are April, May, June, July, August and October (0 days).
Average daylight in September /
Average sunshine in September
Warrenton, OR
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in September: 8h and 48min
The months with the most sunshine are July and August (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days in September
Warrenton, OR
- Average sunshine days in September: 15.7 days
The month with the most sunshine days is August (20.5 days).
The month with the least sunshine days is February (7.3 days).
Average UV index in September
Warrenton, OR
- Average UV index in September: 4
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Warrenton, OR
- Average cloud cover in September: 37
The months with the most cloud cover are January and February (Cloud cover 59).
The month with the least cloud cover is August (Cloud cover 35).
Average visibility in September
Warrenton, OR
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, September, October, November and December (6mi).
The month with the lowest visibility is August (5mi).
