September weather forecastWaitsburg, WA
September
Weather in September
The first month of the autumn, September, is also a moderately hot month in Waitsburg, Washington, with an average temperature fluctuating between 54.1°F (12.3°C) and 74.1°F (23.4°C).Temperature
A change in temperatures is noted as August gives way to September, with average highs reducing from 84.2°F (29°C) to a still warm 74.1°F (23.4°C). An average low-temperature of 54.1°F (12.3°C) marks the month of September.Humidity
The average relative humidity in September is 46%.Rainfall
In Waitsburg, in September, it is raining for 6.9 days, with typically 0.51" (13mm) of accumulated precipitation. Throughout the year, in Waitsburg, there are 142.4 rainfall days, and 15.39" (391mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, September, November and December. September is the first month it typically snows. Throughout September, in the average 0.1 snowfall days, it receives 0.24" (6mm) of snow. In Waitsburg, during the entire year, snow falls for 29 days and aggregates up to 13.7" (348mm) of snow.Daylight
The average length of the day in September is 12h and 32min.On the first day of the month, sunrise is at 6:14 am and sunset at 7:30 pm. On the last day of September, in Waitsburg, sunrise is at 6:50 am and sunset at 6:33 pm PDT.
Sunshine
In September, the average sunshine is 10.5h.UV index
The average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: A daily maximum UV index of 4 in September translates into the following instructions:
Adopt protective measures - Requirement to safeguard skin and eyes from harm exists. The Sun's radiation is especially intense around midday; try to stay in shade during this period. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration. Be on the lookout! Nearly twofold UV radiation from the Sun can be reflected by snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Waitsburg, WA
- Average high temperature in September: 74.1°F
The warmest month (with the highest average high temperature) is July (84.6°F).
The month with the lowest average high temperature is December (36.5°F).
- Average low temperature in September: 54.1°F
The month with the highest average low temperature is August (61°F).
The coldest month (with the lowest average low temperature) is December (26.2°F).
Average pressure in September
Waitsburg, WA
- Average pressure in September: 29.95"Hg
The month with the highest atmospheric pressure is January (30.19"Hg).
The month with the lowest atmospheric pressure is August (29.9"Hg).
Average wind speed in September
Waitsburg, WA
- Average wind speed in September: 6.3mph
The windiest month (with the highest average wind speed) is April (8.6mph).
The calmest month (with the lowest average wind speed) is September (6.3mph).
Average humidity in September
Waitsburg, WA
- Average humidity in September: 46%
The month with the highest relative humidity is January (81%).
The month with the lowest relative humidity is August (38%).
Average rainfall in September
Waitsburg, WA
- Average rainfall in September: 0.51"
The wettest month (with the highest rainfall) is December (1.97").
The driest months (with the least rainfall) are July and August (0.35").
Average rainfall days in September
Waitsburg, WA
- Average rainfall days in September: 6.9 days
The month with the highest number of rainy days is March (17.6 days).
The month with the least rainy days is July (5.1 days).
Average snowfall in September
Waitsburg, WA
- Average snowfall in September: 0.24"
The month with the highest snowfall is February (4.45").
The months with the least snowfall are June, July, August and October (0").
Average snowfall days in September
Waitsburg, WA
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is February (8.2 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Waitsburg, 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: 10h and 30min
The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 5h and 12min).
Average sunshine days in September
Waitsburg, WA
- Average sunshine days in September: 20 days
The month with the most sunshine days is July (24.1 days).
The month with the least sunshine days is February (10 days).
Average UV index in September
Waitsburg, WA
- Average UV index in September: 4
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Waitsburg, WA
- Average cloud cover in September: 17
The months with the most cloud cover are January and February (Cloud cover 45).
The months with the least cloud cover are July and August (Cloud cover 10).
Average visibility in September
Waitsburg, WA
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
