September weather forecastRosburg, WA
September
Weather in September
The first month of the autumn, September, is also an enjoyable month in Rosburg, Washington, with an average temperature varying between 50.9°F (10.5°C) and 64.9°F (18.3°C).Temperature
September brings a marginal elevation to a refreshing 64.9°F (18.3°C) from August's 68.2°F (20.1°C) in Rosburg's average high-temperatures. Rosburg observes an average nighttime low-temperature of 50.9°F (10.5°C) during the month of September.Humidity
In September, the average relative humidity in Rosburg is 83%.Rainfall
In Rosburg, during September, the rain falls for 12.3 days and regularly aggregates up to 1.89" (48mm) of precipitation. In Rosburg, Washington, during the entire year, the rain falls for 195.9 days and collects up to 40.59" (1031mm) of precipitation.Snowfall
In Rosburg, Washington, snow does not fall in April through November.Daylight
In Rosburg, the average length of the day in September is 12h and 32min.On the first day of September in Rosburg, sunrise is at 6:35 am and sunset at 7:52 pm. On the last day of the month, sunrise is at 7:12 am and sunset at 6:55 pm PDT.
Sunshine
The average sunshine in September in Rosburg, Washington, is 8.6h.UV index
In September, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for the ordinary person.Note: The daily maximum UV index of 4 in September interprets into the following advice:
Be mindful. Individuals with a lighter skin tone may suffer burns in less than 30 minutes. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Rosburg, WA
- Average high temperature in September: 64.9°F
The warmest month (with the highest average high temperature) is August (68.2°F).
The month with the lowest average high temperature is December (44.6°F).
- Average low temperature in September: 50.9°F
The month with the highest average low temperature is August (52.5°F).
The coldest month (with the lowest average low temperature) is December (37.6°F).
Average pressure in September
Rosburg, WA
- 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
Rosburg, WA
- Average wind speed in September: 5.5mph
The windiest month (with the highest average wind speed) is January (8.5mph).
The calmest month (with the lowest average wind speed) is August (4.9mph).
Average humidity in September
Rosburg, WA
- Average humidity in September: 83%
The months with the highest relative humidity are January, February, November and December (85%).
The months with the lowest relative humidity are May and July (81%).
Average rainfall in September
Rosburg, WA
- Average rainfall in September: 1.89"
The wettest month (with the highest rainfall) is December (6.42").
The driest months (with the least rainfall) are July and August (0.55").
Average rainfall days in September
Rosburg, WA
- Average rainfall days in September: 12.3 days
The month with the highest number of rainy days is December (21.9 days).
The month with the least rainy days is August (7.8 days).
Average snowfall in September
Rosburg, WA
- Average snowfall in September: 0"
The months with the highest snowfall are January and February (0.87").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Rosburg, WA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1.4 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
Rosburg, WA
- 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 36min
The month with the most sunshine is August (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in September
Rosburg, WA
- Average sunshine days in September: 15.2 days
The month with the most sunshine days is August (19.7 days).
The month with the least sunshine days is February (7.2 days).
Average UV index in September
Rosburg, WA
- 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
Rosburg, WA
- Average cloud cover in September: 39
The months with the most cloud cover are January and February (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 38).
Average visibility in September
Rosburg, WA
- Average visibility in September: 5mi
The months with the highest visibility are January, February, March, April, May, June, October, November and December (6mi).
The months with the lowest visibility are July, August and September (5mi).
