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 onset of September results in a small decrease in the average high-temperature, moderately receding from a warm 81.7°F (27.6°C) in August to a still moderately hot 75.6°F (24.2°C). During September nights, Saint Clairsville records an average temperature of 55.2°F (12.9°C).Humidity
The average relative humidity in September in Saint Clairsville is 79%.Rainfall
In Saint Clairsville, during September, the rain falls for 13.4 days and regularly aggregates up to 1.65" (42mm) of precipitation. Throughout the year, there are 159.9 rainfall days, and 22.99" (584mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall in Saint Clairsville.Daylight
In Saint Clairsville, the average length of the day in September is 12h and 26min.On the first day of the month, sunrise is at 6:52 am and sunset at 7:54 pm. On the last day of September, sunrise is at 7:19 am and sunset at 7:07 pm EDT.
Sunshine
The average sunshine in September is 8.2h.UV index
In Saint Clairsville, Ohio, the average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for the average person.Note: The maximum UV index, 4 during September, leads to the following recommendations:
Ensure safety - Sun damage prevention is strongly urged. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades.
Frequently asked questions
What are the temperatures in Saint Clairsville in September?
What is the average humidity in September in Saint Clairsville?
How much does it rain in Saint Clairsville in September?
When it does not snow in Saint Clairsville?
Does it snow in Saint Clairsville in September?
How many hours of daylight does Saint Clairsville have in September?
What time are sunrise and sunset in September in Saint Clairsville?
How long on average sun shines in September in Saint Clairsville?
What is the UV index reading in September in Saint Clairsville?
Average temperature in September
Saint Clairsville, OH
- Average high temperature in September: 75.6°F
The warmest month (with the highest average high temperature) is July (83.1°F).
The month with the lowest average high temperature is January (33.4°F).
- Average low temperature in September: 55.2°F
The month with the highest average low temperature is July (62.2°F).
The coldest month (with the lowest average low temperature) is January (20.7°F).
Average pressure in September
Saint Clairsville, OH
- Average pressure in September: 30.05"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in September
Saint Clairsville, OH
- Average wind speed in September: 5.2mph
The windiest month (with the highest average wind speed) is January (7.8mph).
The calmest months (with the lowest average wind speed) are July and August (4.7mph).
Average humidity in September
Saint Clairsville, OH
- Average humidity in September: 79%
The month with the highest relative humidity is February (85%).
The month with the lowest relative humidity is April (77%).
Average rainfall in September
Saint Clairsville, OH
- Average rainfall in September: 1.65"
The wettest month (with the highest rainfall) is April (2.4").
The driest month (with the least rainfall) is November (1.5").
Average rainfall days in September
Saint Clairsville, OH
- Average rainfall days in September: 13.4 days
The month with the highest number of rainy days is May (19.1 days).
The month with the least rainy days is January (8.3 days).
Average snowfall in September
Saint Clairsville, OH
- Average snowfall in September: 0"
The month with the highest snowfall is February (3.58").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Saint Clairsville, OH
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (15.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Saint Clairsville, OH
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in September: 8h and 1min
The month with the most sunshine is August (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 0min).
Average sunshine days in September
Saint Clairsville, OH
- Average sunshine days in September: 14.4 days
The month with the most sunshine days is November (16.9 days).
The month with the least sunshine days is February (9.4 days).
Average UV index in September
Saint Clairsville, OH
- Average UV index in September: 4
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in September
Saint Clairsville, OH
- Average cloud cover in September: 40
The month with the most cloud cover is January (Cloud cover 69).
The month with the least cloud cover is August (Cloud cover 35).
Average visibility in September
Saint Clairsville, OH
- Average visibility in September: 5mi
The months with the highest visibility are April and November (6mi).
The months with the lowest visibility are January and February (4mi).
Saint Clairsville, Ohio, USA
Weather forecast for your location
2. Allow the app to use your location
