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
South Prairie observes a small decrease in the average high-temperature with the arrival of September, falling from August's warm 74.1°F (23.4°C) to a comfortable 67.1°F (19.5°C). September is noted for a mean low-temperature of 46°F (7.8°C).Humidity
In South Prairie, the average relative humidity in September is 75%.Rainfall
In September, in South Prairie, Washington, the rain falls for 12 days. Throughout September, 1.69" (43mm) of precipitation is accumulated. Throughout the year, in South Prairie, there are 189.1 rainfall days, and 41.93" (1065mm) of precipitation is accumulated.Snowfall
In South Prairie, snow does not fall in May through October.Daylight
The average length of the day in September in South Prairie, Washington, is 12h and 32min.On the first day of the month, sunrise is at 6:28 am and sunset at 7:47 pm. On the last day of September, sunrise is at 7:07 am and sunset at 6:49 pm PDT.
Sunshine
In September, the average sunshine is 9h.UV index
The average daily maximum UV index in September is 3. A UV Index reading of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: In September, a daily maximum UV index of 3 leads to the following instructions:
Exercise prevention - Protecting skin and eyes from harm is required. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key. Alert! The snow's reflection can amplify the UV radiation of the Sun nearly twice.
Frequently asked questions
What is the usual temperature for South Prairie in September?
What is the average humidity in September in South Prairie?
How many days does it rain in September in South Prairie?
When it does not snow in South Prairie?
How many hours of daylight does South Prairie have in September?
What time are sunrise and sunset in September in South Prairie?
How long on average sun shines in September in South Prairie?
What is the UV index reading in September in South Prairie?
Average temperature in September
South Prairie, WA
- Average high temperature in September: 67.1°F
The warmest month (with the highest average high temperature) is August (74.1°F).
The month with the lowest average high temperature is December (39.9°F).
- Average low temperature in September: 46°F
The month with the highest average low temperature is August (49.3°F).
The coldest month (with the lowest average low temperature) is December (29.8°F).
Average pressure in September
South Prairie, WA
- Average pressure in September: 30"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is August (29.99"Hg).
Average wind speed in September
South Prairie, WA
- Average wind speed in September: 3.9mph
The windiest month (with the highest average wind speed) is January (5.3mph).
The calmest month (with the lowest average wind speed) is August (3.6mph).
Average humidity in September
South Prairie, WA
- Average humidity in September: 75%
The months with the highest relative humidity are January and February (87%).
The month with the lowest relative humidity is July (70%).
Average rainfall in September
South Prairie, WA
- Average rainfall in September: 1.69"
The wettest months (with the highest rainfall) are January and December (6.1").
The driest month (with the least rainfall) is July (0.63").
Average rainfall days in September
South Prairie, WA
- Average rainfall days in September: 12 days
The month with the highest number of rainy days is March (21.2 days).
The month with the least rainy days is August (7.6 days).
Average snowfall in September
South Prairie, WA
- Average snowfall in September: 0"
The month with the highest snowfall is February (5.2").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
South Prairie, WA
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is February (6.3 days).
The months with the least snowfall days are June, July, August and October (0 days).
Average daylight in September /
Average sunshine in September
South Prairie, 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: 9h and 0min
The month with the most sunshine is August (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 4h and 0min).
Average sunshine days in September
South Prairie, WA
- Average sunshine days in September: 16.5 days
The month with the most sunshine days is July (21.2 days).
The month with the least sunshine days is March (7.8 days).
Average UV index in September
South Prairie, WA
- Average UV index in September: 3
The month with the highest UV index is July (UV index 5).
The month with the lowest UV index is November (UV index 1).
Average cloud cover in September
South Prairie, WA
- Average cloud cover in September: 38
The month with the most cloud cover is March (Cloud cover 59).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in September
South Prairie, WA
- Average visibility in September: 5mi
The months with the highest visibility are April, May, June, July, August, September and October (5mi).
The months with the lowest visibility are January, February, March, November and December (4mi).
South Prairie, Washington, USA
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