September weather forecastRichmond, OH
September
Weather in September
The first month of the autumn, September, is still a warm month in Richmond, Ohio, with temperature in the range of an average high of 75.2°F (24°C) and an average low of 55°F (12.8°C).Temperature
With the onset of September, Richmond experiences a modest temperature adjustment, with the average high-temperature gently receding from a warm 81.5°F (27.5°C) in August to a still moderately hot 75.2°F (24°C). Throughout the month of September, Richmond observes an average nighttime temperature of 55°F (12.8°C).Humidity
In September, the average relative humidity in Richmond is 79%.Rainfall
In September, in Richmond, the rain falls for 15.1 days. Throughout September, 2.44" (62mm) of precipitation is accumulated. Throughout the year, in Richmond, there are 182 rainfall days, and 33.15" (842mm) of precipitation is accumulated.Snowfall
In Richmond, snow does not fall in June through September.Daylight
In Richmond, the average length of the day in September is 12h and 27min.On the first day of September in Richmond, sunrise is at 6:51 am and sunset at 7:54 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 7:06 pm EDT.
Sunshine
In September, the average sunshine is 8.3h.UV index
The average daily maximum UV index in September in Richmond is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for average individuals.Note: In September, the maximum UV index of 4 translates into these guidelines:
Take precautions - Protection against skin and eye damage is obliged. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Richmond, OH
- Average high temperature in September: 75.2°F
The warmest month (with the highest average high temperature) is July (83.3°F).
The month with the lowest average high temperature is January (33.1°F).
- Average low temperature in September: 55°F
The month with the highest average low temperature is July (61.5°F).
The coldest month (with the lowest average low temperature) is January (20.1°F).
Average pressure in September
Richmond, OH
- Average pressure in September: 30.05"Hg
The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in September
Richmond, OH
- Average wind speed in September: 5.2mph
The windiest month (with the highest average wind speed) is January (8.1mph).
The calmest months (with the lowest average wind speed) are July and August (4.7mph).
Average humidity in September
Richmond, OH
- Average humidity in September: 79%
The month with the highest relative humidity is February (85%).
The months with the lowest relative humidity are April, July and August (77%).
Average rainfall in September
Richmond, OH
- Average rainfall in September: 2.44"
The wettest month (with the highest rainfall) is April (3.39").
The driest month (with the least rainfall) is November (2.28").
Average rainfall days in September
Richmond, OH
- Average rainfall days in September: 15.1 days
The month with the highest number of rainy days is May (20.9 days).
The month with the least rainy days is February (10.3 days).
Average snowfall in September
Richmond, OH
- Average snowfall in September: 0"
The month with the highest snowfall is February (5.55").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Richmond, OH
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (16.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Richmond, OH
- Average daylight in September: 12h and 24min
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 18min).
- Average sunshine in September: 8h and 18min
The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 0min).
Average sunshine days in September
Richmond, OH
- Average sunshine days in September: 12.9 days
The month with the most sunshine days is November (15 days).
The months with the least sunshine days are January and May (8.3 days).
Average UV index in September
Richmond, OH
- Average UV index in September: 4
The month with the highest UV index is June (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in September
Richmond, 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
Richmond, 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).
