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
September brings an average high-temperature of a still warm 73.6°F (23.1°C), showing a slight difference from August's 78.6°F (25.9°C). De Graff experiences a steady low-temperature of 55.4°F (13°C) throughout September.Humidity
In De Graff, the average relative humidity in September is 79%.Rainfall
The month with the least rainfall in De Graff is September, when the rain falls for 6.4 days and typically collects 0.28" (7mm) of precipitation.Snowfall
In De Graff, snow does not fall in May through September.Daylight
In September, the average length of the day is 12h and 27min.On the first day of the month, sunrise is at 7:03 am and sunset at 8:07 pm. On the last day of September, sunrise is at 7:31 am and sunset at 7:19 pm EDT.
Sunshine
In September, the average sunshine is 8h.UV index
In September, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: In September, the maximum UV index of 4 suggests these recommendations:
Heed the precautions - Suggestions to avoid sunburn are made. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.
Frequently asked questions
What is the temperature in September in De Graff?
What is the average humidity in September in De Graff?
What is the driest month in De Graff?
How much does it rain in De Graff in September?
When it does not snow in De Graff?
Does it snow in De Graff in September?
What is the average length of the day in September in De Graff?
When are sunrise and sunset in September in De Graff?
How many hours of sunshine does De Graff have in September?
How high is the UV index in September in De Graff?
Average temperature in September
De Graff, OH
- Average high temperature in September: 73.6°F
The warmest month (with the highest average high temperature) is July (79.9°F).
The month with the lowest average high temperature is January (31.6°F).
- Average low temperature in September: 55.4°F
The month with the highest average low temperature is July (63.7°F).
The coldest month (with the lowest average low temperature) is January (19.9°F).
Average pressure in September
De Graff, OH
- Average pressure in September: 30.04"Hg
The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
De Graff, OH
- Average wind speed in September: 6.6mph
The windiest month (with the highest average wind speed) is January (10.7mph).
The calmest month (with the lowest average wind speed) is August (5.9mph).
Average humidity in September
De Graff, OH
- Average humidity in September: 79%
The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is October (75%).
Average rainfall in September
De Graff, OH
- Average rainfall in September: 0.28"
The wettest month (with the highest rainfall) is June (0.75").
The driest month (with the least rainfall) is September (0.28").
Average rainfall days in September
De Graff, OH
- Average rainfall days in September: 6.4 days
The month with the highest number of rainy days is May (10 days).
The month with the least rainy days is January (3.3 days).
Average snowfall in September
De Graff, OH
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.47").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
De Graff, OH
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (5.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
De Graff, 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 0min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 24min).
Average sunshine days in September
De Graff, OH
- Average sunshine days in September: 20.7 days
The month with the most sunshine days is November (23.7 days).
The month with the least sunshine days is May (17.5 days).
Average UV index in September
De Graff, OH
- Average UV index in September: 4
The months with the highest UV index are June and August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in September
De Graff, OH
- Average cloud cover in September: 35
The month with the most cloud cover is January (Cloud cover 64).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in September
De Graff, OH
- Average visibility in September: 5mi
The months with the highest visibility are January, February, March, April, May, June, October, November and December (6mi).
The months with the lowest visibility are July, August and September (5mi).
De Graff, Ohio, USA
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