September weather forecastHay, WA
September
Weather in September
September, the first month of the autumn in Hay, is also a moderately hot month, with an average temperature varying between 74.3°F (23.5°C) and 54.5°F (12.5°C).Temperature
The beginning of September involves a decrease in the average high-temperature, transitioning from 83.8°F (28.8°C) in August to a still moderately hot 74.3°F (23.5°C). During September, Hay sees a mean low-temperature of 54.5°F (12.5°C).Humidity
In September, the average relative humidity is 44%.Rainfall
In Hay, during September, the rain falls for 6.2 days and regularly aggregates up to 0.47" (12mm) of precipitation. Throughout the year, there are 122.8 rainfall days, and 13.43" (341mm) of precipitation is accumulated.Snowfall
January through May, September through December are months with snowfall. September is the first month it typically snows. Throughout September, in the average 0.1 snowfall days, it receives 0.2" (5mm) of snow. Throughout the year, there are 32.7 snowfall days, and 16.77" (426mm) of snow is accumulated.Daylight
In September, the average length of the day is 12h and 32min.On the first day of the month, sunrise is at 6:12 am and sunset at 7:30 pm. On the last day of September, sunrise is at 6:50 am and sunset at 6:32 pm PDT.
Sunshine
The average sunshine in September in Hay is 10.4h.UV index
In Hay, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: A maximum UV index of 4 in September translates into the following recommendations:
Exercise caution. Those with pale skin may experience burns in less than half an hour. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. Boost your sun resistance with garments that are densely woven yet spacious. Foresee this! The reflection from snow can nearly double the intensity of UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Hay, WA
- Average high temperature in September: 74.3°F
The warmest month (with the highest average high temperature) is August (83.8°F).
The month with the lowest average high temperature is December (36.3°F).
- Average low temperature in September: 54.5°F
The month with the highest average low temperature is August (61.7°F).
The coldest month (with the lowest average low temperature) is December (25.9°F).
Average pressure in September
Hay, WA
- Average pressure in September: 29.95"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
Hay, WA
- Average wind speed in September: 6mph
The windiest month (with the highest average wind speed) is April (8.1mph).
The calmest months (with the lowest average wind speed) are August and September (6mph).
Average humidity in September
Hay, WA
- Average humidity in September: 44%
The month with the highest relative humidity is January (81%).
The month with the lowest relative humidity is August (37%).
Average rainfall in September
Hay, WA
- Average rainfall in September: 0.47"
The wettest months (with the highest rainfall) are March and December (1.69").
The driest month (with the least rainfall) is July (0.31").
Average rainfall days in September
Hay, WA
- Average rainfall days in September: 6.2 days
The month with the highest number of rainy days is March (15.7 days).
The month with the least rainy days is July (4.8 days).
Average snowfall in September
Hay, WA
- Average snowfall in September: 0.2"
The month with the highest snowfall is February (5.12").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Hay, WA
- Average snowfall days in September: 0.1 days
The months with the highest number of snowfall days are February and December (8 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Hay, 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 24min
The month with the most sunshine is August (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 5h and 0min).
Average sunshine days in September
Hay, WA
- Average sunshine days in September: 21.9 days
The month with the most sunshine days is July (25 days).
The month with the least sunshine days is March (11.9 days).
Average UV index in September
Hay, 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
Hay, WA
- Average cloud cover in September: 18
The months with the most cloud cover are January and February (Cloud cover 46).
The months with the least cloud cover are July and August (Cloud cover 11).
Average visibility in September
Hay, 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).
