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 transition to September results in a modest reduction in average high-temperature, moving from a moderately hot 77.5°F (25.3°C) in August to a pleasant 70.3°F (21.3°C). The month of September sees a significant daily temperature drop, recording an average low-temperature of 46.9°F (8.3°C).Humidity
In Adna, the average relative humidity in September is 79%.Rainfall
In September, the rain falls for 11.3 days. Throughout September, 1.65" (42mm) of precipitation is accumulated. Throughout the year, there are 185.5 rainfall days, and 36.1" (917mm) of precipitation is accumulated.Snowfall
In Adna, snow does not fall in April through October.Daylight
In Adna, the average length of the day in September is 12h and 32min.On the first day of the month, sunrise is at 6:33 am and sunset at 7:50 pm. On the last day of September, sunrise is at 7:10 am and sunset at 6:53 pm PDT.
Sunshine
In Adna, Washington, the average sunshine in September is 8.3h.UV index
In Adna, the average daily maximum UV index in September is 3. A UV Index of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for the average person.Note: A maximum high UV index of 3 in September translates into the following recommendations:
Ensure safety - Recommendations to avert sunburn are presented. Minimize direct exposure to the Sun during midday when its radiation is at its peak. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.
Frequently asked questions
What are the temperatures in Adna in September?
What is the average humidity in September in Adna?
How many days does it rain in September in Adna?
When it does not snow in Adna?
How many hours of daylight does Adna have in September?
When is the sunrise / sunset in September in Adna?
How long on average sun shines in September in Adna?
What is the UV index intensity in September in Adna?
Average temperature in September
Adna, WA
- Average high temperature in September: 70.3°F
The warmest month (with the highest average high temperature) is August (77.5°F).
The month with the lowest average high temperature is December (42.6°F).
- Average low temperature in September: 46.9°F
The month with the highest average low temperature is August (50°F).
The coldest month (with the lowest average low temperature) is December (33.1°F).
Average pressure in September
Adna, WA
- Average pressure in September: 30.02"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The months with the lowest atmospheric pressure are March, August and September (30.02"Hg).
Average wind speed in September
Adna, WA
- Average wind speed in September: 3.6mph
The windiest months (with the highest average wind speed) are January, March and November (4.5mph).
The calmest month (with the lowest average wind speed) is September (3.6mph).
Average humidity in September
Adna, WA
- Average humidity in September: 79%
The months with the highest relative humidity are January, February, November and December (89%).
The month with the lowest relative humidity is July (73%).
Average rainfall in September
Adna, WA
- Average rainfall in September: 1.65"
The wettest month (with the highest rainfall) is January (5.51").
The driest month (with the least rainfall) is July (0.47").
Average rainfall days in September
Adna, WA
- Average rainfall days in September: 11.3 days
The month with the highest number of rainy days is March (21.5 days).
The month with the least rainy days is August (6.4 days).
Average snowfall in September
Adna, WA
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.93").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Adna, WA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (3.5 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
Adna, WA
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 36min).
- Average sunshine in September: 8h and 2min
The month with the most sunshine is August (Average sunshine: 10h and 12min).
The month with the least sunshine is December (Average sunshine: 3h and 30min).
Average sunshine days in September
Adna, WA
- Average sunshine days in September: 16.9 days
The months with the most sunshine days are July and August (20.8 days).
The month with the least sunshine days is February (7.6 days).
Average UV index in September
Adna, WA
- Average UV index in September: 3
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
Adna, WA
- Average cloud cover in September: 47
The months with the most cloud cover are January, February and December (Cloud cover 65).
The month with the least cloud cover is August (Cloud cover 38).
Average visibility in September
Adna, WA
- Average visibility in September: 4mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (4mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (4mi).
Adna, Washington, USA
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