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
The unfolding of September shows an average high-temperature of a still enjoyable 63°F (17.2°C), indicating a slight variance from August's 67.6°F (19.8°C). An average nighttime temperature of 49.5°F (9.7°C) is noted in Sappho during the month of September.Humidity
In September, the average relative humidity in Sappho is 82%.Rainfall
In Sappho, in September, during 9.9 rainfall days, 0.98" (25mm) of precipitation is typically accumulated. In Sappho, during the entire year, the rain falls for 142.6 days and collects up to 19.61" (498mm) of precipitation.Snowfall
January through April, September and December are months with snowfall. September is the first month it typically snows. Throughout September, in the average 0.1 snowfall days, it receives 0.04" (1mm) of snow. In Sappho, during the entire year, snow falls for 5.1 days and aggregates up to 2.17" (55mm) of snow.Daylight
The average length of the day in September in Sappho is 12h and 33min.On the first day of the month, sunrise is at 6:36 am and sunset at 7:57 pm. On the last day of September, in Sappho, Washington, sunrise is at 7:16 am and sunset at 6:57 pm PDT.
Sunshine
The average sunshine in September is 8.6h.UV index
In Sappho, the average daily maximum UV index in September is 3. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for the average person.Note: In September, an average UV index of 3 transforms into the following instructions:
Put precautions into practice - Ensuring skin and eye safety is a necessity. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes. 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
What is the temperature in September in Sappho?
What is the average humidity in September in Sappho?
How much does it rain in Sappho in September?
When does it start snowing in Sappho?
How many hours of daylight does Sappho have in September?
When is the sunrise / sunset in September in Sappho?
How long on average sun shines in September in Sappho?
What is the UV index reading in September in Sappho?
Average temperature in September
Sappho, WA
- Average high temperature in September: 63°F
The warmest month (with the highest average high temperature) is August (67.6°F).
The month with the lowest average high temperature is December (42.4°F).
- Average low temperature in September: 49.5°F
The month with the highest average low temperature is August (50.7°F).
The coldest month (with the lowest average low temperature) is February (36°F).
Average pressure in September
Sappho, WA
- Average pressure in September: 30.01"Hg
The month with the highest atmospheric pressure is July (30.07"Hg).
The month with the lowest atmospheric pressure is March (29.98"Hg).
Average wind speed in September
Sappho, WA
- Average wind speed in September: 4.2mph
The windiest month (with the highest average wind speed) is January (7.4mph).
The calmest month (with the lowest average wind speed) is August (3.9mph).
Average humidity in September
Sappho, WA
- Average humidity in September: 82%
The months with the highest relative humidity are January and December (87%).
The months with the lowest relative humidity are May, July and August (80%).
Average rainfall in September
Sappho, WA
- Average rainfall in September: 0.98"
The wettest month (with the highest rainfall) is January (3.66").
The driest month (with the least rainfall) is July (0.28").
Average rainfall days in September
Sappho, WA
- Average rainfall days in September: 9.9 days
The month with the highest number of rainy days is November (16.5 days).
The month with the least rainy days is August (5.1 days).
Average snowfall in September
Sappho, WA
- Average snowfall in September: 0.04"
The month with the highest snowfall is January (1.14").
The months with the least snowfall are May, June, July, August, October and November (0").
Average snowfall days in September
Sappho, WA
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is February (1.9 days).
The months with the least snowfall days are May, June, July, August and October (0 days).
Average daylight in September /
Average sunshine in September
Sappho, WA
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 16h and 0min).
The month with the shortest days is December (Average daylight: 8h and 24min).
- Average sunshine in September: 8h and 4min
The months with the most sunshine are July and August (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in September
Sappho, WA
- Average sunshine days in September: 17.5 days
The month with the most sunshine days is July (23 days).
The month with the least sunshine days is November (11.7 days).
Average UV index in September
Sappho, WA
- Average UV index in September: 3
The months with the highest UV index are June, July and August (UV index 4).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Sappho, WA
- Average cloud cover in September: 39
The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in September
Sappho, WA
- Average visibility in September: 5mi
The months with the highest visibility are February, March, April, October, November and December (6mi).
The months with the lowest visibility are January, May, June, July, August and September (5mi).
Sappho, Washington, USA
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