September weather forecastAlvadore, OR
September
Weather in September
September, the first month of the autumn in Alvadore, is still a warm month, with an average temperature fluctuating between 73.4°F (23°C) and 47.3°F (8.5°C).Temperature
With the arrival of September, Alvadore experiences a modest decline in average high-temperatures, transitioning from a moderately hot 80.4°F (26.9°C) in August to a still warm 73.4°F (23°C). Alvadore's daily high temperature significantly diverges from the consistently recorded temperature low averaging a frosty 47.3°F (8.5°C) in September.Humidity
In Alvadore, the average relative humidity in September is 74%.Rainfall
In Alvadore, in September, during 5.8 rainfall days, 0.55" (14mm) of precipitation is typically accumulated. Throughout the year, there are 121.1 rainfall days, and 11.73" (298mm) of precipitation is accumulated.Snowfall
May through October are months without snowfall.Daylight
In September, the average length of the day is 12h and 29min.On the first day of September in Alvadore, sunrise is at 6:37 am and sunset at 7:48 pm. On the last day of the month, sunrise is at 7:10 am and sunset at 6:54 pm PDT.
Sunshine
The average sunshine in September is 9.3h.UV index
In Alvadore, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for average individuals.Note: In September, a daily maximum UV index of 4 leads to the following instructions:
Prioritize safety - Recommendations to avert sunburn are shared. The solar radiation around mid-day is intense; avoid the Sun and stay safe. To cut down UV radiation exposure by about half, sport a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Alvadore, OR
- Average high temperature in September: 73.4°F
The warmest month (with the highest average high temperature) is August (80.4°F).
The month with the lowest average high temperature is December (45.7°F).
- Average low temperature in September: 47.3°F
The month with the highest average low temperature is August (50°F).
The coldest month (with the lowest average low temperature) is December (34.2°F).
Average pressure in September
Alvadore, 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
Alvadore, OR
- Average wind speed in September: 3.7mph
The windiest month (with the highest average wind speed) is March (4.6mph).
The calmest months (with the lowest average wind speed) are August and September (3.7mph).
Average humidity in September
Alvadore, OR
- Average humidity in September: 74%
The month with the highest relative humidity is December (88%).
The month with the lowest relative humidity is August (70%).
Average rainfall in September
Alvadore, OR
- Average rainfall in September: 0.55"
The wettest month (with the highest rainfall) is December (1.81").
The driest month (with the least rainfall) is July (0.12").
Average rainfall days in September
Alvadore, OR
- Average rainfall days in September: 5.8 days
The month with the highest number of rainy days is March (15.4 days).
The month with the least rainy days is August (3.2 days).
Average snowfall in September
Alvadore, OR
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.06").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Alvadore, OR
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1.8 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
Alvadore, OR
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in September: 9h and 18min
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 0min).
Average sunshine days in September
Alvadore, OR
- Average sunshine days in September: 22.7 days
The month with the most sunshine days is July (25.3 days).
The month with the least sunshine days is February (13.2 days).
Average UV index in September
Alvadore, OR
- Average UV index in September: 4
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Alvadore, OR
- Average cloud cover in September: 34
The month with the most cloud cover is February (Cloud cover 62).
The month with the least cloud cover is August (Cloud cover 25).
Average visibility in September
Alvadore, OR
- Average visibility in September: 5mi
The months with the highest visibility are July, August and September (5mi).
The months with the lowest visibility are January, February, March, April, May, June, October, November and December (4mi).
