September weather forecastMason, OH
September
Weather in September
The herald of autumn, September, paves the way for a shift in the weather pattern in Mason, Ohio. The temperature remains comfortable, yet noticeably cooler than August with an average high of 76.6°F (24.8°C). The bright sunshine gradually gives way to overcast skies, making September a rather cloudy month. The change in season from summer to autumn is visible in September as the leaves start to change color. It's a great time for nature walks and capturing scenic beauty.Temperature
The advent of September brings a slight shift in average high-temperature, moving from 82°F (27.8°C) in August to a still moderately hot 76.6°F (24.8°C). Mason reports a consistent average low-temperature of 58.1°F (14.5°C) throughout September nights.Humidity
In Mason, the average relative humidity in September is 75%.Rainfall
September is the month with the least rainfall in Mason. Rain falls for 12.6 days and accumulates 1.42" (36mm) of precipitation.Snowfall
May through October are months without snowfall.Daylight
In Mason, the average length of the day in September is 12h and 26min.On the first day of the month, sunrise is at 7:06 am and sunset at 8:07 pm. On the last day of September, sunrise is at 7:33 am and sunset at 7:20 pm EDT.
Sunshine
In Mason, the average sunshine in September is 8.3h.UV index
The average daily maximum UV index in September in Mason is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: The maximum UV index, 4 during September, leads to the following recommendations:
Heed the precautions - Protecting the skin and eyes from damage is compulsory. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. A hat with a broad brim is indispensable, filtering out up to half of UV rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Mason, OH
- Average high temperature in September: 76.6°F
The warmest month (with the highest average high temperature) is July (82.8°F).
The month with the lowest average high temperature is January (35.1°F).
- Average low temperature in September: 58.1°F
The month with the highest average low temperature is July (65.1°F).
The coldest month (with the lowest average low temperature) is January (22.6°F).
Average pressure in September
Mason, OH
- Average pressure in September: 30.03"Hg
The months with the highest atmospheric pressure are January and November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in September
Mason, OH
- Average wind speed in September: 6mph
The windiest month (with the highest average wind speed) is January (9.3mph).
The calmest months (with the lowest average wind speed) are July and August (5.3mph).
Average humidity in September
Mason, OH
- Average humidity in September: 75%
The months with the highest relative humidity are January, February and December (81%).
The month with the lowest relative humidity is October (74%).
Average rainfall in September
Mason, OH
- Average rainfall in September: 1.42"
The wettest month (with the highest rainfall) is May (2.95").
The driest month (with the least rainfall) is September (1.42").
Average rainfall days in September
Mason, OH
- Average rainfall days in September: 12.6 days
The month with the highest number of rainy days is May (18.1 days).
The month with the least rainy days is November (8.1 days).
Average snowfall in September
Mason, OH
- Average snowfall in September: 0"
The months with the highest snowfall are February and March (2.05").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Mason, OH
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (8.3 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Mason, 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 18min
The months with the most sunshine are June, July and August (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in September
Mason, OH
- Average sunshine days in September: 15.3 days
The month with the most sunshine days is November (19.2 days).
The month with the least sunshine days is May (10.9 days).
Average UV index in September
Mason, OH
- Average UV index in September: 4
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Mason, OH
- Average cloud cover in September: 32
The month with the most cloud cover is January (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in September
Mason, OH
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
