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
The shift from August to September includes a small decrease in the average high-temperature, from a warm 77.4°F (25.2°C) to a pleasant 70.3°F (21.3°C). In Wauna, September nights cool down to an average of 49.8°F (9.9°C).Humidity
In September, the average relative humidity is 75%.Rainfall
In September, the rain falls for 11.4 days. Throughout September, 1.3" (33mm) of precipitation is accumulated. In Wauna, during the entire year, the rain falls for 175.2 days and collects up to 30.43" (773mm) of precipitation.Snowfall
May through October are months without snowfall in Wauna.Daylight
In Wauna, the average length of the day in September is 12h and 32min.On the first day of September in Wauna, sunrise is at 6:30 am and sunset at 7:49 pm. On the last day of the month, sunrise is at 7:09 am and sunset at 6:51 pm PDT.
Sunshine
The average sunshine in September in Wauna is 9.2h.UV index
In Wauna, 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 unsafe exposure to UV radiation for average individuals.Note: The UV index of 4 during September translates into the following guidance:
Exercise prevention - Warding off sunburn is urged. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures in Wauna?
What is the average humidity in September in Wauna?
How many days does it rain in September in Wauna?
When it does not snow in Wauna?
How many hours of daylight does Wauna have in September?
When are sunrise and sunset in September in Wauna?
How long on average sun shines in September in Wauna?
What is the UV index reading in September in Wauna?
Average temperature in September
Wauna, WA
- Average high temperature in September: 70.3°F
The warmest month (with the highest average high temperature) is August (77.4°F).
The month with the lowest average high temperature is December (42.3°F).
- Average low temperature in September: 49.8°F
The month with the highest average low temperature is August (53.2°F).
The coldest month (with the lowest average low temperature) is December (33.8°F).
Average pressure in September
Wauna, WA
- Average pressure in September: 30.02"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The month with the lowest atmospheric pressure is March (30.01"Hg).
Average wind speed in September
Wauna, WA
- Average wind speed in September: 4mph
The windiest month (with the highest average wind speed) is March (5.2mph).
The calmest months (with the lowest average wind speed) are July and August (3.5mph).
Average humidity in September
Wauna, WA
- Average humidity in September: 75%
The month with the highest relative humidity is December (88%).
The month with the lowest relative humidity is July (69%).
Average rainfall in September
Wauna, WA
- Average rainfall in September: 1.3"
The wettest month (with the highest rainfall) is December (5").
The driest month (with the least rainfall) is July (0.43").
Average rainfall days in September
Wauna, WA
- Average rainfall days in September: 11.4 days
The month with the highest number of rainy days is March (19.7 days).
The month with the least rainy days is August (6 days).
Average snowfall in September
Wauna, WA
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.91").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Wauna, WA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (3.8 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
Wauna, WA
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).
- Average sunshine in September: 9h and 1min
The month with the most sunshine is August (Average sunshine: 10h and 36min).
The month with the least sunshine is December (Average sunshine: 3h and 48min).
Average sunshine days in September
Wauna, WA
- Average sunshine days in September: 17.1 days
The month with the most sunshine days is August (22.3 days).
The month with the least sunshine days is November (8.7 days).
Average UV index in September
Wauna, WA
- 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
Wauna, WA
- Average cloud cover in September: 35
The month with the most cloud cover is December (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 26).
Average visibility in September
Wauna, WA
- Average visibility in September: 5mi
The months with the highest visibility are June, July and August (6mi).
The months with the lowest visibility are January, February, November and December (4mi).
Wauna, Washington, USA
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