September weather forecastJohnstown, OH
September
Weather in September
The first month of the autumn, September, is also a moderately hot month in Johnstown, Ohio, with an average temperature ranging between max 74.7°F (23.7°C) and min 55.9°F (13.3°C).Temperature
The transition into September subtly indicates a reduction in the average high-temperature, down to a still moderately hot 74.7°F (23.7°C) from August's warm 80.1°F (26.7°C). Johnstown's average low-temperature during September nights is observed to be a moderate 55.9°F (13.3°C).Humidity
The average relative humidity in September is 78%.Rainfall
September is the month with the least rainfall in Johnstown. Rain falls for 14.5 days and accumulates 2.01" (51mm) of precipitation.Snowfall
June through September are months without snowfall in Johnstown.Daylight
In September, the average length of the day in Johnstown, Ohio, is 12h and 26min.On the first day of the month, sunrise is at 6:59 am and sunset at 8:01 pm. On the last day of September, in Johnstown, Ohio, sunrise is at 7:26 am and sunset at 7:14 pm EDT.
Sunshine
In Johnstown, Ohio, the average sunshine in September is 8.2h.UV index
The average daily maximum UV index in September in Johnstown is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: In September, a daily maximum UV index of 4 leads to the following instructions:
Undertake precautions - Obligation exists to protect against skin and eye damage. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. Employ a hat with a wide brim for robust protection, cutting UV exposure by half.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Johnstown, OH
- Average high temperature in September: 74.7°F
The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (32.5°F).
- Average low temperature in September: 55.9°F
The month with the highest average low temperature is July (63.3°F).
The coldest month (with the lowest average low temperature) is January (20.3°F).
Average pressure in September
Johnstown, OH
- Average pressure in September: 30.04"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in September
Johnstown, OH
- Average wind speed in September: 6.2mph
The windiest month (with the highest average wind speed) is January (9.8mph).
The calmest months (with the lowest average wind speed) are July and August (5.6mph).
Average humidity in September
Johnstown, OH
- Average humidity in September: 78%
The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is November (76%).
Average rainfall in September
Johnstown, OH
- Average rainfall in September: 2.01"
The wettest month (with the highest rainfall) is May (3.86").
The driest month (with the least rainfall) is September (2.01").
Average rainfall days in September
Johnstown, OH
- Average rainfall days in September: 14.5 days
The month with the highest number of rainy days is May (20.2 days).
The month with the least rainy days is February (9.6 days).
Average snowfall in September
Johnstown, OH
- Average snowfall in September: 0"
The month with the highest snowfall is January (4.02").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Johnstown, OH
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (13.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Johnstown, 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 24min).
- Average sunshine in September: 8h and 12min
The months with the most sunshine are July and August (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days in September
Johnstown, OH
- Average sunshine days in September: 13.5 days
The month with the most sunshine days is November (16.4 days).
The month with the least sunshine days is May (8.2 days).
Average UV index in September
Johnstown, OH
- Average UV index in September: 4
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Johnstown, 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 30).
Average visibility in September
Johnstown, OH
- Average visibility in September: 5mi
The months with the highest visibility are March, April, May, June, July, August, October, November and December (6mi).
The months with the lowest visibility are January, February and September (5mi).
