September weather forecastOrson, IA
September
Weather in September
The first month of the autumn, September, is still a warm month in Orson, Iowa, with an average temperature ranging between max 76.3°F (24.6°C) and min 56.3°F (13.5°C).Temperature
The beginning of September brings a slight decrease in the average high-temperature, transitioning from 81.9°F (27.7°C) in August to a still moderately hot 76.3°F (24.6°C). An average nighttime temperature of 56.3°F (13.5°C) is observed during September.Humidity
The average relative humidity in September is 72%.Rainfall
In Orson, during September, the rain falls for 12.3 days and regularly aggregates up to 2.24" (57mm) of precipitation. Throughout the year, there are 123.1 rainfall days, and 23.39" (594mm) of precipitation is accumulated.Snowfall
In Orson, snow does not fall in June through September.Daylight
In Orson, the average length of the day in September is 12h and 28min.On the first day of September, sunrise is at 6:50 am and sunset at 7:56 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 7:06 pm CDT.
Sunshine
The average sunshine in September is 9.1h.UV index
The average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for the average person.Note: In September, the maximum UV index of 5 transforms into these recommendations:
Take precautions. Light skin individuals may get burned in less than 30 minutes. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Orson, IA
- Average high temperature in September: 76.3°F
The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (28.6°F).
- Average low temperature in September: 56.3°F
The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is January (15.3°F).
Average pressure in September
Orson, IA
- Average pressure in September: 29.99"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).
Average wind speed in September
Orson, IA
- Average wind speed in September: 8.5mph
The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest month (with the lowest average wind speed) is July (7.1mph).
Average humidity in September
Orson, IA
- Average humidity in September: 72%
The month with the highest relative humidity is January (81%).
The month with the lowest relative humidity is October (66%).
Average rainfall in September
Orson, IA
- Average rainfall in September: 2.24"
The wettest month (with the highest rainfall) is May (3.74").
The driest month (with the least rainfall) is January (0.71").
Average rainfall days in September
Orson, IA
- Average rainfall days in September: 12.3 days
The month with the highest number of rainy days is May (17 days).
The month with the least rainy days is February (2.7 days).
Average snowfall in September
Orson, IA
- Average snowfall in September: 0"
The month with the highest snowfall is February (3.58").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Orson, IA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (8.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Orson, IA
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in September: 9h and 6min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 4h and 36min).
Average sunshine days in September
Orson, IA
- Average sunshine days in September: 16 days
The month with the most sunshine days is December (21.7 days).
The month with the least sunshine days is June (10.7 days).
Average UV index in September
Orson, IA
- 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, October, November and December (UV index 2).
Average cloud cover in September
Orson, IA
- Average cloud cover in September: 28
The month with the most cloud cover is January (Cloud cover 50).
The month with the least cloud cover is July (Cloud cover 25).
Average visibility in September
Orson, IA
- 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).
