September weather forecastJackson Junction, IA
September
Weather in September
The first month of the autumn, September, is also an agreeable month in Jackson Junction, Iowa, with an average temperature ranging between min 52.9°F (11.6°C) and max 71.4°F (21.9°C).Temperature
As Jackson Junction enters September, the average high-temperature subtly lowers from the a moderately hot 77.5°F (25.3°C) of August to an agreeable 71.4°F (21.9°C). An average nighttime temperature of 52.9°F (11.6°C) is noted during the month of September.Humidity
The average relative humidity in September is 80%.Rainfall
In Jackson Junction, during September, the rain falls for 12.1 days and regularly aggregates up to 2.44" (62mm) of precipitation. In Jackson Junction, Iowa, during the entire year, the rain falls for 146.5 days and collects up to 31.3" (795mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
In September, the average length of the day in Jackson Junction is 12h and 29min.On the first day of September in Jackson Junction, sunrise is at 6:33 am and sunset at 7:42 pm. On the last day of the month, sunrise is at 7:05 am and sunset at 6:50 pm CDT.
Sunshine
In September, the average sunshine is 8.9h.UV index
The average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for the average person.Note: The average daily UV index of 4 in September transforms into the following instructions:
Take necessary precautions - Protection from skin and eye injury is mandatory. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Jackson Junction, IA
- Average high temperature in September: 71.4°F
The warmest month (with the highest average high temperature) is July (79°F).
The month with the lowest average high temperature is January (22.8°F).
- Average low temperature in September: 52.9°F
The month with the highest average low temperature is July (62.4°F).
The coldest month (with the lowest average low temperature) is January (10.6°F).
Average pressure in September
Jackson Junction, IA
- Average pressure in September: 30.02"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in September
Jackson Junction, IA
- Average wind speed in September: 8.2mph
The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest months (with the lowest average wind speed) are July and August (7.1mph).
Average humidity in September
Jackson Junction, IA
- Average humidity in September: 80%
The month with the highest relative humidity is January (89%).
The months with the lowest relative humidity are April and October (75%).
Average rainfall in September
Jackson Junction, IA
- Average rainfall in September: 2.44"
The wettest month (with the highest rainfall) is June (5.08").
The driest month (with the least rainfall) is January (1.18").
Average rainfall days in September
Jackson Junction, IA
- Average rainfall days in September: 12.1 days
The months with the highest number of rainy days are May and June (19.8 days).
The month with the least rainy days is February (4.3 days).
Average snowfall in September
Jackson Junction, IA
- Average snowfall in September: 0"
The month with the highest snowfall is February (6.5").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Jackson Junction, IA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (14.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Jackson Junction, IA
- Average daylight in September: 12h and 30min
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 54min
The month with the most sunshine is August (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days in September
Jackson Junction, IA
- Average sunshine days in September: 15.4 days
The month with the most sunshine days is November (16.2 days).
The month with the least sunshine days is June (7.9 days).
Average UV index in September
Jackson Junction, IA
- Average UV index in September: 4
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in September
Jackson Junction, IA
- Average cloud cover in September: 33
The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in September
Jackson Junction, IA
- Average visibility in September: 6mi
The months with the highest visibility are March, April, May, June, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February and July (5mi).
