September weather forecastDeerfield, OH
September
Weather in September
September, the first month of the autumn in Deerfield, is also a moderately hot month, with an average temperature fluctuating between 54.5°F (12.5°C) and 73.9°F (23.3°C).Temperature
The transition into September is accompanied by a slight temperature decrease, with the average high-temperature shifting from a moderately hot 80.6°F (27°C) in August to a still warm 73.9°F (23.3°C). Deerfield experiences an average low-temperature reading of 54.5°F (12.5°C) throughout September.Humidity
The average relative humidity in September is 80%.Rainfall
September is the month with the least rainfall. Rain falls for 15.8 days and accumulates 2.05" (52mm) of precipitation.Snowfall
June through October are months without snowfall in Deerfield.Daylight
In Deerfield, the average length of the day in September is 12h and 28min.On the first day of the month, sunrise is at 6:51 am and sunset at 7:56 pm. On the last day of September, sunrise is at 7:20 am and sunset at 7:07 pm EDT.
Sunshine
The average sunshine in September is 8.1h.UV index
In Deerfield, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: A typical high UV index of 4 in September suggests the following recommendations:
Undertake precautions - Guarding against sun damage is counselled. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. Employ a hat with a wide brim for robust protection, cutting UV exposure by half.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Deerfield, OH
- Average high temperature in September: 73.9°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (31.3°F).
- Average low temperature in September: 54.5°F
The month with the highest average low temperature is July (61.2°F).
The coldest month (with the lowest average low temperature) is January (19°F).
Average pressure in September
Deerfield, OH
- Average pressure in September: 30.05"Hg
The month with the highest atmospheric pressure is November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in September
Deerfield, OH
- Average wind speed in September: 5.7mph
The windiest month (with the highest average wind speed) is January (8.5mph).
The calmest month (with the lowest average wind speed) is July (5.2mph).
Average humidity in September
Deerfield, OH
- Average humidity in September: 80%
The month with the highest relative humidity is February (87%).
The months with the lowest relative humidity are April, May, June, July and August (78%).
Average rainfall in September
Deerfield, OH
- Average rainfall in September: 2.05"
The wettest month (with the highest rainfall) is June (3.39").
The driest month (with the least rainfall) is September (2.05").
Average rainfall days in September
Deerfield, OH
- Average rainfall days in September: 15.8 days
The month with the highest number of rainy days is May (19.8 days).
The month with the least rainy days is January (8.8 days).
Average snowfall in September
Deerfield, OH
- Average snowfall in September: 0"
The month with the highest snowfall is January (7.28").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in September
Deerfield, OH
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (19.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Deerfield, OH
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in September: 8h and 6min
The month with the most sunshine is August (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 2h and 30min).
Average sunshine days in September
Deerfield, OH
- Average sunshine days in September: 12.4 days
The month with the most sunshine days is October (12.8 days).
The month with the least sunshine days is February (6.9 days).
Average UV index in September
Deerfield, OH
- Average UV index in September: 4
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in September
Deerfield, OH
- Average cloud cover in September: 41
The month with the most cloud cover is January (Cloud cover 73).
The month with the least cloud cover is August (Cloud cover 35).
Average visibility in September
Deerfield, OH
- Average visibility in September: 5mi
The month with the highest visibility is April (6mi).
The months with the lowest visibility are January and February (4mi).
