September weather forecastUniontown, WA
September
Weather in September
The first month of the autumn, September, is also a moderately hot month in Uniontown, Washington, with an average temperature varying between 52.7°F (11.5°C) and 75.4°F (24.1°C).Temperature
The start of September involves a temperature drop, moving from a moderately hot 85.6°F (29.8°C) in August to a still warm 75.4°F (24.1°C). Uniontown records a consistent low-temperature average of 52.7°F (11.5°C) during September, indicating a significant difference from the daytime heat.Humidity
In Uniontown, the average relative humidity in September is 45%.Rainfall
In September, in Uniontown, the rain falls for 5.1 days. Throughout September, 0.31" (8mm) of precipitation is accumulated. In Uniontown, during the entire year, the rain falls for 116.2 days and collects up to 8.23" (209mm) of precipitation.Snowfall
In Uniontown, snow does not fall in April through September.Daylight
The average length of the day in September is 12h and 32min.On the first day of September, sunrise is at 6:09 am and sunset at 7:26 pm. On the last day of the month, sunrise is at 6:46 am and sunset at 6:29 pm PDT.
Sunshine
The average sunshine in September is 10.5h.UV index
The average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: In September, a daily UV index of 4 turns into the following recommendations:
Adopt protective measures - Requirement to safeguard skin and eyes from harm exists. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Uniontown, WA
- Average high temperature in September: 75.4°F
The warmest month (with the highest average high temperature) is August (85.6°F).
The month with the lowest average high temperature is December (36.5°F).
- Average low temperature in September: 52.7°F
The month with the highest average low temperature is August (59.4°F).
The coldest month (with the lowest average low temperature) is December (24.8°F).
Average pressure in September
Uniontown, WA
- Average pressure in September: 29.96"Hg
The month with the highest atmospheric pressure is January (30.2"Hg).
The month with the lowest atmospheric pressure is August (29.91"Hg).
Average wind speed in September
Uniontown, WA
- Average wind speed in September: 4.5mph
The windiest month (with the highest average wind speed) is April (6mph).
The calmest month (with the lowest average wind speed) is August (4.4mph).
Average humidity in September
Uniontown, WA
- Average humidity in September: 45%
The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is August (38%).
Average rainfall in September
Uniontown, WA
- Average rainfall in September: 0.31"
The wettest month (with the highest rainfall) is March (0.98").
The driest month (with the least rainfall) is August (0.24").
Average rainfall days in September
Uniontown, WA
- Average rainfall days in September: 5.1 days
The months with the highest number of rainy days are March and April (13.8 days).
The month with the least rainy days is August (4.5 days).
Average snowfall in September
Uniontown, WA
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.89").
The months with the least snowfall are April, May, June, July, August and September (0").
Average snowfall days in September
Uniontown, WA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (4.7 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Uniontown, WA
- Average daylight in September: 12h and 30min
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: 10h and 30min
The month with the most sunshine is August (Average sunshine: 12h and 6min).
The month with the least sunshine is January (Average sunshine: 5h and 0min).
Average sunshine days in September
Uniontown, WA
- Average sunshine days in September: 23.1 days
The month with the most sunshine days is July (23.8 days).
The month with the least sunshine days is February (12.8 days).
Average UV index in September
Uniontown, 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
Uniontown, WA
- Average cloud cover in September: 18
The month with the most cloud cover is February (Cloud cover 48).
The months with the least cloud cover are July and August (Cloud cover 12).
Average visibility in September
Uniontown, WA
- Average visibility in September: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February and December (5mi).
