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 shift from August to September corresponds with a decrease in the average high-temperature, down to a pleasant 71.6°F (22°C) from a warm 81.3°F (27.4°C). Throughout September, the average low-temperature in Smithville dips to a cool 50.7°F (10.4°C).Humidity
In Smithville, the average relative humidity in September is 58%.Rainfall
In Smithville, during September, the rain falls for 6.9 days and regularly aggregates up to 0.59" (15mm) of precipitation. In Smithville, during the entire year, the rain falls for 133.5 days and collects up to 16.93" (430mm) of precipitation.Snowfall
April through October are months without snowfall.Daylight
In September, the average length of the day in Smithville is 12h and 31min.On the first day of the month, sunrise is at 6:26 am and sunset at 7:41 pm. On the last day of September, in Smithville, sunrise is at 7:02 am and sunset at 6:45 pm PDT.
Sunshine
The average sunshine in September is 10.7h.UV index
The average daily maximum UV index in September in Smithville is 4. A UV Index reading of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for average individuals.Note: The maximum UV index of 4 during September translates into these guidelines:
Undertake precautions - Obligation exists to protect against skin and eye damage. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.
Frequently asked questions
What is the usual temperature for Smithville in September?
What is the average humidity in September in Smithville?
How many days does it rain in September in Smithville?
When it does not snow in Smithville?
How many hours of daylight does Smithville have in September?
When are sunrise and sunset in September in Smithville?
How long on average sun shines in September in Smithville?
What is the UV index reading in September in Smithville?
Average temperature in September
Smithville, WA
- Average high temperature in September: 71.6°F
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is December (37°F).
- Average low temperature in September: 50.7°F
The month with the highest average low temperature is August (55.8°F).
The coldest month (with the lowest average low temperature) is December (27.1°F).
Average pressure in September
Smithville, WA
- Average pressure in September: 29.98"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is August (29.96"Hg).
Average wind speed in September
Smithville, WA
- Average wind speed in September: 5.5mph
The windiest month (with the highest average wind speed) is June (7.1mph).
The calmest months (with the lowest average wind speed) are January and December (4.8mph).
Average humidity in September
Smithville, WA
- Average humidity in September: 58%
The months with the highest relative humidity are January and December (85%).
The months with the lowest relative humidity are July and August (51%).
Average rainfall in September
Smithville, WA
- Average rainfall in September: 0.59"
The wettest month (with the highest rainfall) is January (2.99").
The driest month (with the least rainfall) is July (0.16").
Average rainfall days in September
Smithville, WA
- Average rainfall days in September: 6.9 days
The month with the highest number of rainy days is March (16.3 days).
The month with the least rainy days is August (3.2 days).
Average snowfall in September
Smithville, WA
- Average snowfall in September: 0"
The month with the highest snowfall is February (4.29").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Smithville, WA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is December (4.4 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Smithville, WA
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in September: 10h and 4min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 4h and 48min).
Average sunshine days in September
Smithville, WA
- Average sunshine days in September: 21.6 days
The month with the most sunshine days is July (26.8 days).
The month with the least sunshine days is March (10.6 days).
Average UV index in September
Smithville, WA
- Average UV index in September: 4
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Smithville, WA
- Average cloud cover in September: 18
The month with the most cloud cover is January (Cloud cover 52).
The months with the least cloud cover are July and August (Cloud cover 10).
Average visibility in September
Smithville, 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, February and December (5mi).
Smithville, Washington, USA
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