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
September sees a slight reduction in average high-temperature, with a shift from a moderately hot 84°F (28.9°C) in August to a still warm 75.2°F (24°C). An average low-temperature of 55.6°F (13.1°C) is expected during September.Humidity
With an average relative humidity of 59%, September is the least humid month.Rainfall
In Johnstown, in September, during 10.4 rainfall days, 1.46" (37mm) of precipitation is typically accumulated. Throughout the year, there are 103.2 rainfall days, and 17.44" (443mm) of precipitation is accumulated.Snowfall
January through May, September through December are months with snowfall. September is the first month it typically snows. Throughout September, in the average 0.1 snowfall days, it receives 0.24" (6mm) of snow. Throughout the year, there are 39.8 snowfall days, and 13.94" (354mm) of snow is accumulated.Daylight
In Johnstown, the average length of the day in September is 12h and 28min.On the first day of September, sunrise is at 7:06 am and sunset at 8:13 pm. On the last day of the month, sunrise is at 7:37 am and sunset at 7:22 pm CDT.
Sunshine
In September, the average sunshine is 8.9h.UV index
In September, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for the average person.Note: The daily high UV index of 5 in September translates into this advice:
Undertake precautions - It is suggested to shield oneself from sunburn. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. Tightly woven clothing, when worn loosely, shields effectively against the Sun. Take into account! The reflection from snow can nearly double the Sun's UV radiation intensity.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Johnstown in September?
What is the least humid month?
What is the average humidity in September?
How many days does it rain in September in Johnstown?
When does it start to snow?
How many hours of daylight does Johnstown have in September?
What time are sunrise and sunset in September?
How many hours of sunshine does Johnstown have in September?
What is the UV index intensity in September?
Average temperature in September
Johnstown, NE
- Average high temperature in September: 75.2°F
The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (31.1°F).
- Average low temperature in September: 55.6°F
The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).
Average pressure in September
Johnstown, NE
- Average pressure in September: 29.96"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in September
Johnstown, NE
- Average wind speed in September: 11.7mph
The windiest month (with the highest average wind speed) is April (13.3mph).
The calmest months (with the lowest average wind speed) are July and August (10.7mph).
Average humidity in September
Johnstown, NE
- Average humidity in September: 59%
The month with the highest relative humidity is January (79%).
The month with the lowest relative humidity is September (59%).
Average rainfall in September
Johnstown, NE
- Average rainfall in September: 1.46"
The wettest month (with the highest rainfall) is June (2.8").
The driest month (with the least rainfall) is January (0.43").
Average rainfall days in September
Johnstown, NE
- Average rainfall days in September: 10.4 days
The month with the highest number of rainy days is May (14.8 days).
The months with the least rainy days are February and December (2.3 days).
Average snowfall in September
Johnstown, NE
- Average snowfall in September: 0.24"
The month with the highest snowfall is December (2.99").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Johnstown, NE
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is January (9.6 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Johnstown, NE
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in September: 8h and 5min
The month with the most sunshine is July (Average sunshine: 11h and 6min).
The month with the least sunshine is January (Average sunshine: 5h and 12min).
Average sunshine days in September
Johnstown, NE
- Average sunshine days in September: 16.8 days
The month with the most sunshine days is November (21.8 days).
The month with the least sunshine days is June (11.8 days).
Average UV index in September
Johnstown, NE
- Average UV index in September: 5
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
Johnstown, NE
- Average cloud cover in September: 23
The months with the most cloud cover are January and February (Cloud cover 45).
The month with the least cloud cover is August (Cloud cover 22).
Average visibility in September
Johnstown, NE
- 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).
Johnstown, Nebraska, USA
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