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
The arrival of September corresponds with a minor reduction in the average high-temperature, down from August's 84°F (28.9°C) to a still warm 77.9°F (25.5°C). During September nights, Mount Joy witnesses a consistent average temperature of 56.5°F (13.6°C).Humidity
The months with the lowest humidity are April, August through November, with an average relative humidity of 76%.Rainfall
September is the month with the least rainfall. Rain falls for 11.9 days and accumulates 1.38" (35mm) of precipitation.Snowfall
In Mount Joy, snow does not fall in May through October.Daylight
In September, the average length of the day in Mount Joy is 12h and 26min.On the first day of the month, sunrise is at 7:02 am and sunset at 8:02 pm. On the last day of September, sunrise is at 7:28 am and sunset at 7:16 pm EDT.
Sunshine
The average sunshine in September is 8.1h.UV index
In September, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: An average UV index of 4 in September transforms into this advice:
Preventative actions are necessary - Recommendations to ward off sunburn are given. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Mount Joy in September?
What is the least humid month?
What is the average humidity in September in Mount Joy?
What is the driest month in Mount Joy?
How many days does it rain in September?
When it does not snow?
What is the average length of the day in September?
When is the sunrise / sunset in September?
How long on average sun shines in September?
What is the UV index intensity in September?
Average temperature in September
Mount Joy, OH
- Average high temperature in September: 77.9°F
The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (36.1°F).
- Average low temperature in September: 56.5°F
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (23.5°F).
Average pressure in September
Mount Joy, OH
- Average pressure in September: 30.04"Hg
The months with the highest atmospheric pressure are January and November (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in September
Mount Joy, OH
- Average wind speed in September: 5.2mph
The windiest month (with the highest average wind speed) is January (8mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).
Average humidity in September
Mount Joy, OH
- Average humidity in September: 76%
The month with the highest relative humidity is February (82%).
The months with the lowest relative humidity are April, August, September, October and November (76%).
Average rainfall in September
Mount Joy, OH
- Average rainfall in September: 1.38"
The wettest month (with the highest rainfall) is May (2.8").
The driest month (with the least rainfall) is September (1.38").
Average rainfall days in September
Mount Joy, OH
- Average rainfall days in September: 11.9 days
The month with the highest number of rainy days is May (17.5 days).
The month with the least rainy days is November (8 days).
Average snowfall in September
Mount Joy, OH
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.2").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Mount Joy, OH
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (7.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Mount Joy, OH
- Average daylight in September: 12h and 2min
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 1min
The month with the most sunshine is August (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in September
Mount Joy, OH
- Average sunshine days in September: 16.5 days
The month with the most sunshine days is November (20.1 days).
The month with the least sunshine days is May (11.7 days).
Average UV index in September
Mount Joy, OH
- Average UV index in September: 4
The months with the highest UV index are 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
Mount Joy, OH
- Average cloud cover in September: 35
The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in September
Mount Joy, OH
- Average visibility in September: 5mi
The months with the highest visibility are February, March, April, June, October, November and December (6mi).
The months with the lowest visibility are January, May, July, August and September (5mi).
Mount Joy, Ohio, USA
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