September weather forecastMedical Lake, WA
September
Weather in September
September, the first month of the autumn in Medical Lake, is still a pleasant month, with an average temperature varying between 51.4°F (10.8°C) and 72.5°F (22.5°C).Temperature
Transition from August to September is accompanied by a temperature drop, with average high-temperatures decreasing from a moderately hot 83.5°F (28.6°C) to a pleasant 72.5°F (22.5°C). Medical Lake, during September, witnesses an average low-temperature of 51.4°F (10.8°C).Humidity
In Medical Lake, the average relative humidity in September is 47%.Rainfall
In Medical Lake, during September, the rain falls for 5.2 days and regularly aggregates up to 0.35" (9mm) of precipitation. In Medical Lake, Washington, during the entire year, the rain falls for 78.7 days and collects up to 7.72" (196mm) of precipitation.Snowfall
January through May, September through December are months with snowfall in Medical Lake. September is the first month it typically snows. Throughout September, in the average 0.2 snowfall days, it receives 0.16" (4mm) of snow. In Medical Lake, Washington, during the entire year, snow falls for 37.4 days and aggregates up to 15.75" (400mm) of snow.Daylight
In Medical Lake, the average length of the day in September is 12h and 33min.On the first day of the month, sunrise is at 6:10 am and sunset at 7:30 pm. On the last day of September, in Medical Lake, sunrise is at 6:49 am and sunset at 6:31 pm PDT.
Sunshine
The average sunshine in September in Medical Lake is 10.3h.UV index
In Medical Lake, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: In September, the average maximum UV index of 4 translates into the following recommendations:
Safety measures are advised. Light-skinned individuals may experience burns in under half an hour. To avoid the Sun's strongest rays, limit exposure around the mid-day period. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage. Notice this! Nearly double the intensity of the Sun's UV radiation can be caused by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Medical Lake, WA
- Average high temperature in September: 72.5°F
The warmest month (with the highest average high temperature) is August (83.5°F).
The month with the lowest average high temperature is December (32°F).
- Average low temperature in September: 51.4°F
The month with the highest average low temperature is August (59.7°F).
The coldest month (with the lowest average low temperature) is December (22.5°F).
Average pressure in September
Medical Lake, WA
- Average pressure in September: 29.96"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
Medical Lake, WA
- Average wind speed in September: 6.5mph
The windiest month (with the highest average wind speed) is March (8.1mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).
Average humidity in September
Medical Lake, WA
- Average humidity in September: 47%
The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is August (38%).
Average rainfall in September
Medical Lake, WA
- Average rainfall in September: 0.35"
The wettest month (with the highest rainfall) is May (1.06").
The driest months (with the least rainfall) are July and August (0.28").
Average rainfall days in September
Medical Lake, WA
- Average rainfall days in September: 5.2 days
The month with the highest number of rainy days is April (9.6 days).
The month with the least rainy days is February (3.2 days).
Average snowfall in September
Medical Lake, WA
- Average snowfall in September: 0.16"
The month with the highest snowfall is January (3.58").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Medical Lake, WA
- Average snowfall days in September: 0.2 days
The month with the highest number of snowfall days is December (9.8 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Medical Lake, WA
- Average daylight in September: 12h and 30min
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 30min).
- Average sunshine in September: 10h and 18min
The month with the most sunshine is August (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 3h and 54min).
Average sunshine days in September
Medical Lake, WA
- Average sunshine days in September: 23.5 days
The month with the most sunshine days is July (25.5 days).
The month with the least sunshine days is March (17.3 days).
Average UV index in September
Medical Lake, WA
- Average UV index in September: 4
The month with the highest UV index is July (UV index 7).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in September
Medical Lake, WA
- Average cloud cover in September: 20
The months with the most cloud cover are January and December (Cloud cover 59).
The months with the least cloud cover are July and August (Cloud cover 12).
Average visibility in September
Medical Lake, 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 month with the lowest visibility is January (4mi).
