September weather forecastSaint Marys, OH
September
Weather in September
September, the first month of the autumn in Saint Marys, is still a warm month, with an average temperature ranging between min 55.8°F (13.2°C) and max 73.8°F (23.2°C).Temperature
The advent of September signifies a minor shift to an average high-temperature of a still warm 73.8°F (23.2°C), aligning closely with August. An average low-temperature of 55.8°F (13.2°C) is noted during the nights in September in Saint Marys, Ohio.Humidity
The average relative humidity in September in Saint Marys, Ohio, is 79%.Rainfall
In Saint Marys, during September, the rain falls for 13.3 days and regularly aggregates up to 1.93" (49mm) of precipitation. In Saint Marys, during the entire year, the rain falls for 161.4 days and collects up to 29.25" (743mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
The average length of the day in September in Saint Marys is 12h and 27min.On the first day of September, sunrise is at 7:05 am and sunset at 8:09 pm. On the last day of the month, sunrise is at 7:33 am and sunset at 7:20 pm EDT.
Sunshine
The average sunshine in September is 7.9h.UV index
In Saint Marys, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for average individuals.Note: A maximum high daily UV index of 4 during September translates into the following directions:
Proceed with care. Light skin individuals may be exposed to burns in fewer than 30 minutes. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Saint Marys, OH
- Average high temperature in September: 73.8°F
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (31.6°F).
- Average low temperature in September: 55.8°F
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).
Average pressure in September
Saint Marys, OH
- Average pressure in September: 30.04"Hg
The months with the highest atmospheric pressure are January and November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Saint Marys, OH
- Average wind speed in September: 6.7mph
The windiest month (with the highest average wind speed) is January (10.7mph).
The calmest month (with the lowest average wind speed) is August (6mph).
Average humidity in September
Saint Marys, OH
- Average humidity in September: 79%
The months with the highest relative humidity are January, February and December (83%).
The month with the lowest relative humidity is October (75%).
Average rainfall in September
Saint Marys, OH
- Average rainfall in September: 1.93"
The wettest month (with the highest rainfall) is May (3.5").
The driest month (with the least rainfall) is February (1.85").
Average rainfall days in September
Saint Marys, OH
- Average rainfall days in September: 13.3 days
The month with the highest number of rainy days is May (18.8 days).
The month with the least rainy days is January (7.4 days).
Average snowfall in September
Saint Marys, OH
- Average snowfall in September: 0"
The month with the highest snowfall is February (3.82").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Saint Marys, OH
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (12.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Saint Marys, OH
- Average daylight in September: 12h and 24min
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 18min).
- Average sunshine in September: 7h and 54min
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
Saint Marys, OH
- Average sunshine days in September: 13.8 days
The month with the most sunshine days is November (16.6 days).
The month with the least sunshine days is June (9.4 days).
Average UV index in September
Saint Marys, OH
- Average UV index in September: 4
The months with the highest UV index are July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in September
Saint Marys, OH
- Average cloud cover in September: 37
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
Saint Marys, OH
- Average visibility in September: 5mi
The months with the highest visibility are February, March, April, May, June, July, October, November and December (6mi).
The months with the lowest visibility are January, August and September (5mi).
