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
In the transition to September, Harrah observes a drop in the average high-temperature, moving from a tropical 86.7°F (30.4°C) in August to a moderately hot 75.9°F (24.4°C). Harrah registers a significant drop in temperature in September, with average nighttime lows of 54.1°F (12.3°C).Humidity
In September, the average relative humidity in Harrah is 46%.Rainfall
In Harrah, in September, during 3.9 rainfall days, 0.24" (6mm) of precipitation is typically accumulated. In Harrah, during the entire year, the rain falls for 78.5 days and collects up to 5.16" (131mm) of precipitation.Snowfall
Months with snowfall in Harrah are January through March, September, November and December. September is the first month it typically snows. Throughout September, in the average 0.1 snowfall days, it receives 0.04" (1mm) of snow. In Harrah, during the entire year, snow falls for 12.8 days and aggregates up to 5.35" (136mm) of snow.Daylight
In Harrah, the average length of the day in September is 12h and 32min.On the first day of September, sunrise is at 6:23 am and sunset at 7:40 pm. On the last day of the month, sunrise is at 7:00 am and sunset at 6:43 pm PDT.
Sunshine
The average sunshine in September is 11.2h.UV index
In Harrah, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for the ordinary person.Note: The maximum daily UV index of 4 in September interprets into the following recommendations:
Exercise caution. The susceptibility of light skin individuals to burns is less than 30 minutes. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat. Be mindful! The reflection from snow can increase the Sun's UV radiation nearly twice.
Frequently asked questions
What are the temperatures in Harrah in September?
What is the average humidity in September in Harrah?
How many days does it rain in September in Harrah?
When does it start snowing in Harrah?
What is the average length of the day in September in Harrah?
When is the sunrise / sunset in September in Harrah?
How long on average sun shines in September in Harrah?
What is the UV index reading in September in Harrah?
Average temperature in September
Harrah, WA
- Average high temperature in September: 75.9°F
The warmest month (with the highest average high temperature) is July (86.9°F).
The month with the lowest average high temperature is December (37°F).
- Average low temperature in September: 54.1°F
The month with the highest average low temperature is August (61.2°F).
The coldest month (with the lowest average low temperature) is December (25.7°F).
Average pressure in September
Harrah, WA
- Average pressure in September: 29.97"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is August (29.93"Hg).
Average wind speed in September
Harrah, WA
- Average wind speed in September: 6.1mph
The windiest months (with the highest average wind speed) are April and June (7.1mph).
The calmest month (with the lowest average wind speed) is December (4.6mph).
Average humidity in September
Harrah, WA
- Average humidity in September: 46%
The month with the highest relative humidity is January (81%).
The months with the lowest relative humidity are July and August (38%).
Average rainfall in September
Harrah, WA
- Average rainfall in September: 0.24"
The wettest month (with the highest rainfall) is January (0.83").
The driest month (with the least rainfall) is July (0.08").
Average rainfall days in September
Harrah, WA
- Average rainfall days in September: 3.9 days
The month with the highest number of rainy days is March (9.8 days).
The month with the least rainy days is July (2.1 days).
Average snowfall in September
Harrah, WA
- Average snowfall in September: 0.04"
The month with the highest snowfall is February (1.73").
The months with the least snowfall are April, May, June, July, August and October (0").
Average snowfall days in September
Harrah, WA
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is February (3.9 days).
The months with the least snowfall days are April, May, June, July, August and October (0 days).
Average daylight in September /
Average sunshine in September
Harrah, WA
- Average daylight in September: 12h and 3min
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: 11h and 1min
The months with the most sunshine are July and August (Average sunshine: 12h and 6min).
The month with the least sunshine is January (Average sunshine: 5h and 36min).
Average sunshine days in September
Harrah, WA
- Average sunshine days in September: 23.5 days
The month with the most sunshine days is July (27.3 days).
The month with the least sunshine days is February (17.9 days).
Average UV index in September
Harrah, 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
Harrah, WA
- Average cloud cover in September: 14
The month with the most cloud cover is January (Cloud cover 40).
The month with the least cloud cover is July (Cloud cover 8).
Average visibility in September
Harrah, WA
- Average visibility in September: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
Harrah, Washington, USA
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