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
During the shift to September, a minor reduction in average high-temperature is observed, shifting from a warm 79.7°F (26.5°C) in August to a pleasant 72.3°F (22.4°C). Significant dips from daytime highs mark the September nights, with a consistent average temperature of 48.4°F (9.1°C).Humidity
In Alsea, the average relative humidity in September is 76%.Rainfall
In Alsea, Oregon, during September, the rain falls for 9.6 days and regularly aggregates up to 1.46" (37mm) of precipitation. Throughout the year, in Alsea, there are 169.8 rainfall days, and 34.02" (864mm) of precipitation is accumulated.Snowfall
April through October are months without snowfall in Alsea.Daylight
In Alsea, the average length of the day in September is 12h and 30min.On the first day of September in Alsea, sunrise is at 6:38 am and sunset at 7:50 pm. On the last day of the month, sunrise is at 7:12 am and sunset at 6:56 pm PDT.
Sunshine
The average sunshine in September in Alsea is 8.7h.UV index
The average daily maximum UV index in September in Alsea, Oregon, is 4. A UV Index value of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for the average person.Note: The maximum daily UV index, 4 in September, converts into the following recommendations:
Make use of precautions - Suggestions to resist sunburn are communicated. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. Tightly woven clothing, when worn loosely, shields effectively against the Sun.
Frequently asked questions
What is the usual temperature for Alsea in September?
What is the average humidity in September in Alsea?
How much does it rain in Alsea in September?
When it does not snow in Alsea?
What is the average length of the day in September in Alsea?
When are sunrise and sunset in September in Alsea?
How long on average sun shines in September in Alsea?
How high is the UV index in September in Alsea?
Average temperature in September
Alsea, OR
- Average high temperature in September: 72.3°F
The warmest month (with the highest average high temperature) is August (79.7°F).
The month with the lowest average high temperature is December (44.2°F).
- Average low temperature in September: 48.4°F
The month with the highest average low temperature is August (51.4°F).
The coldest month (with the lowest average low temperature) is December (33.6°F).
Average pressure in September
Alsea, 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
Alsea, OR
- Average wind speed in September: 3.8mph
The windiest months (with the highest average wind speed) are March and April (4.7mph).
The calmest month (with the lowest average wind speed) is August (3.7mph).
Average humidity in September
Alsea, OR
- Average humidity in September: 76%
The month with the highest relative humidity is December (90%).
The months with the lowest relative humidity are July and August (71%).
Average rainfall in September
Alsea, OR
- Average rainfall in September: 1.46"
The wettest month (with the highest rainfall) is December (5.31").
The driest month (with the least rainfall) is July (0.24").
Average rainfall days in September
Alsea, OR
- Average rainfall days in September: 9.6 days
The month with the highest number of rainy days is March (20.6 days).
The month with the least rainy days is August (4.6 days).
Average snowfall in September
Alsea, OR
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.81").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Alsea, OR
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2 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
Alsea, OR
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in September: 8h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 3h and 18min).
Average sunshine days in September
Alsea, OR
- Average sunshine days in September: 18.4 days
The month with the most sunshine days is July (24.8 days).
The month with the least sunshine days is February (8.3 days).
Average UV index in September
Alsea, OR
- Average UV index in September: 4
The months with the highest UV index are June and 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
Alsea, OR
- Average cloud cover in September: 39
The month with the most cloud cover is February (Cloud cover 68).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in September
Alsea, 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).
Alsea, Oregon, USA
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