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
In September, the average high-temperature marginally drops from 82.2°F (27.9°C) in August to a still warm 76.3°F (24.6°C). During September, Bethesda observes a consistent average nighttime temperature of 55.2°F (12.9°C).Humidity
In Bethesda, the average relative humidity in September is 78%.Rainfall
The month with the least rainfall in Bethesda, Ohio, is September, when the rain falls for 9.7 days and typically collects 0.47" (12mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
In September, the average length of the day in Bethesda, Ohio, is 12h and 26min.On the first day of the month, sunrise is at 6:52 am and sunset at 7:55 pm. On the last day of September, in Bethesda, sunrise is at 7:20 am and sunset at 7:07 pm EDT.
Sunshine
The average sunshine in September is 8.2h.UV index
The average daily maximum UV index in September in Bethesda is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The UV index of 4 in September translates into these instructions:
Exercise prevention - Precautions against solar damage are endorsed. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Bethesda in September?
What is the average humidity in September in Bethesda?
What is the driest month in Bethesda?
How much does it rain in Bethesda in September?
When it does not snow in Bethesda?
Does it snow in Bethesda in September?
What is the average length of the day in September in Bethesda?
When are sunrise and sunset in September in Bethesda?
How long on average sun shines in September in Bethesda?
How high is the UV index in September in Bethesda?
Average temperature in September
Bethesda, OH
- Average high temperature in September: 76.3°F
The warmest month (with the highest average high temperature) is July (83.7°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
Bethesda, 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
Bethesda, OH
- Average wind speed in September: 5.2mph
The windiest months (with the highest average wind speed) are January and February (7.6mph).
The calmest months (with the lowest average wind speed) are July and August (4.7mph).
Average humidity in September
Bethesda, OH
- Average humidity in September: 78%
The months with the highest relative humidity are January and February (84%).
The months with the lowest relative humidity are April, July and August (77%).
Average rainfall in September
Bethesda, OH
- Average rainfall in September: 0.47"
The wettest month (with the highest rainfall) is May (1.3").
The driest month (with the least rainfall) is September (0.47").
Average rainfall days in September
Bethesda, OH
- Average rainfall days in September: 9.7 days
The month with the highest number of rainy days is May (15.3 days).
The month with the least rainy days is November (5.8 days).
Average snowfall in September
Bethesda, OH
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.22").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Bethesda, OH
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (10.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Bethesda, 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 6min).
Average sunshine days in September
Bethesda, OH
- Average sunshine days in September: 17.9 days
The month with the most sunshine days is November (21.4 days).
The month with the least sunshine days is May (12.6 days).
Average UV index in September
Bethesda, 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
Bethesda, OH
- Average cloud cover in September: 40
The month with the most cloud cover is January (Cloud cover 67).
The month with the least cloud cover is August (Cloud cover 35).
Average visibility in September
Bethesda, 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, February, March, May, June, July, August, September, October and December (5mi).
Bethesda, Ohio, USA
Weather forecast for your location
2. Allow the app to use your location