September weather forecastGreenfield, OH
September
Weather in September
The first month of the autumn, September, is still a warm month in Greenfield, Ohio, with an average temperature fluctuating between 75.9°F (24.4°C) and 56.7°F (13.7°C).Temperature
In September, Greenfield experiences a barely noticeable shift in meteorological conditions, with average high-temperatures moving from 81°F (27.2°C) in August to a still moderately hot 75.9°F (24.4°C). The low-temperature in Greenfield, Ohio, averages to a moderate 56.7°F (13.7°C) during the nights of September.Humidity
The average relative humidity in September is 77%.Rainfall
September is the month with the least rainfall. Rain falls for 10.4 days and accumulates 0.71" (18mm) of precipitation.Snowfall
May through September are months without snowfall in Greenfield, Ohio.Daylight
The average length of the day in September in Greenfield is 12h and 26min.On the first day of September, sunrise is at 7:02 am and sunset at 8:03 pm. On the last day of the month, sunrise is at 7:29 am and sunset at 7:17 pm EDT.
Sunshine
In Greenfield, the average sunshine in September is 8.2h.UV index
The average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for the average person.Note: A maximum high daily UV index of 4 during September translates into the following directions:
Heed the precautions - It is counselled to guard against solar damage. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Greenfield, OH
- Average high temperature in September: 75.9°F
The warmest month (with the highest average high temperature) is July (82.2°F).
The month with the lowest average high temperature is January (34.7°F).
- Average low temperature in September: 56.7°F
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (22.5°F).
Average pressure in September
Greenfield, OH
- Average pressure in September: 30.04"Hg
The months with the highest atmospheric pressure are January and November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in September
Greenfield, OH
- Average wind speed in September: 6mph
The windiest month (with the highest average wind speed) is January (9.6mph).
The calmest month (with the lowest average wind speed) is August (5.4mph).
Average humidity in September
Greenfield, OH
- Average humidity in September: 77%
The months with the highest relative humidity are January, February and December (82%).
The months with the lowest relative humidity are October and November (75%).
Average rainfall in September
Greenfield, OH
- Average rainfall in September: 0.71"
The wettest month (with the highest rainfall) is May (1.73").
The driest month (with the least rainfall) is September (0.71").
Average rainfall days in September
Greenfield, OH
- Average rainfall days in September: 10.4 days
The month with the highest number of rainy days is May (15.2 days).
The month with the least rainy days is November (7.5 days).
Average snowfall in September
Greenfield, OH
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.42").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Greenfield, OH
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (7.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Greenfield, OH
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in September: 8h and 12min
The month with the most sunshine is August (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in September
Greenfield, OH
- Average sunshine days in September: 16.6 days
The month with the most sunshine days is November (21 days).
The month with the least sunshine days is July (12 days).
Average UV index in September
Greenfield, OH
- Average UV index in September: 4
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in September
Greenfield, OH
- Average cloud cover in September: 34
The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility in September
Greenfield, OH
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (6mi).
The month with the lowest visibility is July (5mi).
