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
September's onset corresponds with a shift in the average high-temperature, moving from a warm 83.7°F (28.7°C) in August to an agreeable 72.9°F (22.7°C). A striking departure from daytime highs to an average low-temperature of 50.7°F (10.4°C) is witnessed during September.Humidity
In September, the average relative humidity in Marshall is 48%.Rainfall
In September, in Marshall, the rain falls for 7.5 days. Throughout September, 0.63" (16mm) of precipitation is accumulated. In Marshall, during the entire year, the rain falls for 127.8 days and collects up to 16.93" (430mm) of precipitation.Snowfall
January through May, September through December are months with snowfall in Marshall. September is the first month it typically snows in Marshall. Throughout September, in the average 0.2 snowfall days, it receives 0.47" (12mm) of snow. In Marshall, during the entire year, snow falls for 62.3 days and aggregates up to 37.83" (961mm) of snow.Daylight
In Marshall, the average length of the day in September is 12h and 33min.On the first day of September, sunrise is at 6:09 am and sunset at 7:29 pm. On the last day of the month, sunrise is at 6:48 am and sunset at 6:30 pm PDT.
Sunshine
The average sunshine in September is 10.2h.UV index
In September, the average daily maximum UV index in Marshall is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for the average person.Note: The maximum daily UV index of 4 in September converts into the following recommendations:
Prioritize safety - Recommendations to avert sunburn are shared. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. On your guard! Snow's reflection can almost double the intensity of the Sun's UV radiation.
Frequently asked questions
What is the temperature in September in Marshall?
What is the average humidity in September in Marshall?
How many days does it rain in September in Marshall?
When does it start snowing in Marshall?
What is the average length of the day in September in Marshall?
When is the sunrise / sunset in September in Marshall?
How long on average sun shines in September in Marshall?
What is the UV index reading in September in Marshall?
Average temperature in September
Marshall, WA
- Average high temperature in September: 72.9°F
The warmest months (with the highest average high temperature) are July and August (83.7°F).
The month with the lowest average high temperature is December (32.2°F).
- Average low temperature in September: 50.7°F
The month with the highest average low temperature is August (59°F).
The coldest month (with the lowest average low temperature) is December (22.1°F).
Average pressure in September
Marshall, 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
Marshall, WA
- Average wind speed in September: 5.9mph
The windiest month (with the highest average wind speed) is April (7.3mph).
The calmest month (with the lowest average wind speed) is August (5.7mph).
Average humidity in September
Marshall, WA
- Average humidity in September: 48%
The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is August (38%).
Average rainfall in September
Marshall, WA
- Average rainfall in September: 0.63"
The wettest month (with the highest rainfall) is March (2.13").
The driest month (with the least rainfall) is August (0.35").
Average rainfall days in September
Marshall, WA
- Average rainfall days in September: 7.5 days
The month with the highest number of rainy days is April (16.3 days).
The month with the least rainy days is July (4.9 days).
Average snowfall in September
Marshall, WA
- Average snowfall in September: 0.47"
The month with the highest snowfall is January (10.39").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Marshall, WA
- Average snowfall days in September: 0.2 days
The month with the highest number of snowfall days is December (15.6 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Marshall, 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 30min).
- Average sunshine in September: 10h and 1min
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
Marshall, WA
- Average sunshine days in September: 20.3 days
The month with the most sunshine days is July (24.1 days).
The month with the least sunshine days is March (9.8 days).
Average UV index in September
Marshall, 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 February and December (UV index 1).
Average cloud cover in September
Marshall, 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 13).
Average visibility in September
Marshall, 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).
Marshall, Washington, USA
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