September weather forecastThrall, WA
September
Weather in September
The first month of the autumn, September, is also an agreeable month in Thrall, Washington, with an average temperature ranging between min 49.1°F (9.5°C) and max 71.1°F (21.7°C).Temperature
Thrall's September weather features a mild decline in high-temperatures, reducing from a moderately hot 82°F (27.8°C) in August to an agreeable 71.1°F (21.7°C). A noticeable temperature swing characterizes Thrall's September nights, dipping to an average of 49.1°F (9.5°C).Humidity
In Thrall, Washington, the average relative humidity in September is 54%.Rainfall
In Thrall, in September, during 6.1 rainfall days, 0.47" (12mm) of precipitation is typically accumulated. Throughout the year, there are 99.9 rainfall days, and 8.66" (220mm) of precipitation is accumulated.Snowfall
January through April, September through December are months with snowfall in Thrall. September is the first month it typically snows. Throughout September, in the average 0.3 snowfall days, it receives 0.31" (8mm) of snow. In Thrall, during the entire year, snow falls for 35.4 days and aggregates up to 15.59" (396mm) of snow.Daylight
In September, the average length of the day is 12h and 32min.On the first day of the month, sunrise is at 6:22 am and sunset at 7:40 pm. On the last day of September, in Thrall, sunrise is at 7:00 am and sunset at 6:42 pm PDT.
Sunshine
In September, the average sunshine is 10.7h.UV index
In Thrall, the average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for the ordinary person.Note: In September, the UV index of 4 transforms into the following advice:
Take necessary precautions - Defending against sun damage is advocated. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat. Be watchful! The reflection of snow can enhance the intensity of the Sun's UV radiation nearly double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Thrall, WA
- Average high temperature in September: 71.1°F
The warmest months (with the highest average high temperature) are July and August (82°F).
The month with the lowest average high temperature is December (33.3°F).
- Average low temperature in September: 49.1°F
The month with the highest average low temperature is August (55.2°F).
The coldest month (with the lowest average low temperature) is December (21.4°F).
Average pressure in September
Thrall, WA
- Average pressure in September: 29.97"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is August (29.94"Hg).
Average wind speed in September
Thrall, WA
- Average wind speed in September: 6.9mph
The windiest month (with the highest average wind speed) is June (8.9mph).
The calmest month (with the lowest average wind speed) is December (4.2mph).
Average humidity in September
Thrall, WA
- Average humidity in September: 54%
The month with the highest relative humidity is January (87%).
The months with the lowest relative humidity are July and August (46%).
Average rainfall in September
Thrall, WA
- Average rainfall in September: 0.47"
The wettest month (with the highest rainfall) is December (1.3").
The driest month (with the least rainfall) is July (0.16").
Average rainfall days in September
Thrall, WA
- Average rainfall days in September: 6.1 days
The month with the highest number of rainy days is March (12.4 days).
The month with the least rainy days is August (2.8 days).
Average snowfall in September
Thrall, WA
- Average snowfall in September: 0.31"
The month with the highest snowfall is December (4.65").
The months with the least snowfall are May, June, July and August (0").
Average snowfall days in September
Thrall, WA
- Average snowfall days in September: 0.3 days
The months with the highest number of snowfall days are January and December (8.7 days).
The months with the least snowfall days are May, June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Thrall, 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 42min
The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The months with the least sunshine are January and December (Average sunshine: 4h and 48min).
Average sunshine days in September
Thrall, WA
- Average sunshine days in September: 22.8 days
The month with the most sunshine days is July (27.1 days).
The month with the least sunshine days is February (13.5 days).
Average UV index in September
Thrall, 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, March, November and December (UV index 2).
Average cloud cover in September
Thrall, WA
- Average cloud cover in September: 18
The month with the most cloud cover is January (Cloud cover 48).
The months with the least cloud cover are July and August (Cloud cover 11).
Average visibility in September
Thrall, 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 and December (4mi).
