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
Lamont's September weather features a mild decline in high-temperatures, reducing from a warm 83.8°F (28.8°C) in August to an agreeable 72.9°F (22.7°C). During September, the nighttime temperature averages of 53.2°F (11.8°C).Humidity
The average relative humidity in September is 45%.Rainfall
In Lamont, in September, during 5.6 rainfall days, 0.24" (6mm) of precipitation is typically accumulated. In Lamont, during the entire year, the rain falls for 84.3 days and collects up to 7.24" (184mm) of precipitation.Snowfall
January through May, September, November and December are months with snowfall. September is the first month it typically snows in Lamont. Throughout September, in the average 0.1 snowfall days, it receives 0.04" (1mm) of snow. In Lamont, during the entire year, snow falls for 32.5 days and aggregates up to 14.09" (358mm) of snow.Daylight
The average length of the day in September is 12h and 32min.On the first day of September, sunrise is at 6:11 am and sunset at 7:30 pm. On the last day of the month, sunrise is at 6:50 am and sunset at 6:32 pm PDT.
Sunshine
In Lamont, the average sunshine in September is 10.4h.UV index
In Lamont, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The maximum daily UV index of 4 in September converts into the following recommendations:
Guard yourself - Precautionary measures against sun damage are advocated. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Lamont in September?
What is the average humidity in September in Lamont?
How many days does it rain in September?
When does it start to snow?
How many hours of daylight does Lamont have in September?
When is the sunrise / sunset in September?
How many hours of sunshine does Lamont have in September?
What is the UV index reading in September?
Average temperature in September
Lamont, WA
- Average high temperature in September: 72.9°F
The warmest month (with the highest average high temperature) is July (84.4°F).
The month with the lowest average high temperature is December (33.1°F).
- Average low temperature in September: 53.2°F
The month with the highest average low temperature is August (61.3°F).
The coldest month (with the lowest average low temperature) is December (23.9°F).
Average pressure in September
Lamont, 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
Lamont, WA
- Average wind speed in September: 7mph
The windiest month (with the highest average wind speed) is March (8.8mph).
The calmest month (with the lowest average wind speed) is August (6.6mph).
Average humidity in September
Lamont, WA
- Average humidity in September: 45%
The month with the highest relative humidity is January (87%).
The month with the lowest relative humidity is August (36%).
Average rainfall in September
Lamont, WA
- Average rainfall in September: 0.24"
The wettest months (with the highest rainfall) are January and May (0.91").
The driest month (with the least rainfall) is July (0.16").
Average rainfall days in September
Lamont, WA
- Average rainfall days in September: 5.6 days
The month with the highest number of rainy days is March (10.1 days).
The month with the least rainy days is July (3.5 days).
Average snowfall in September
Lamont, WA
- Average snowfall in September: 0.04"
The month with the highest snowfall is February (3.82").
The months with the least snowfall are June, July, August and October (0").
Average snowfall days in September
Lamont, WA
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is December (9.3 days).
The months with the least snowfall days are June, July, August and October (0 days).
Average daylight in September /
Average sunshine in September
Lamont, WA
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 36min).
- Average sunshine in September: 10h and 2min
The month with the most sunshine is August (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 4h and 18min).
Average sunshine days in September
Lamont, WA
- Average sunshine days in September: 23.6 days
The month with the most sunshine days is July (26.6 days).
The month with the least sunshine days is February (15.9 days).
Average UV index in September
Lamont, 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
Lamont, WA
- Average cloud cover in September: 19
The months with the most cloud cover are January and December (Cloud cover 55).
The month with the least cloud cover is July (Cloud cover 11).
Average visibility in September
Lamont, WA
- Average visibility in September: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January and December (5mi).
Lamont, Washington, USA
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