September weather forecastBarnes City, IA
September
Weather in September
The first month of the autumn, September, is still a warm month in Barnes City, Iowa, with temperature in the range of an average high of 74.7°F (23.7°C) and an average low of 55.8°F (13.2°C).Temperature
September's arrival comes with a mild decrease in the average high-temperature, moving subtly from a warm 80.6°F (27°C) in August to a still moderately hot 74.7°F (23.7°C). In September, Barnes City reports a consistent average low-temperature of 55.8°F (13.2°C) during the nights.Humidity
In September, the average relative humidity is 77%.Rainfall
In Barnes City, Iowa, in September, during 10.7 rainfall days, 1.5" (38mm) of precipitation is typically accumulated. Throughout the year, in Barnes City, there are 117.7 rainfall days, and 15.12" (384mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall in Barnes City.Daylight
In September, the average length of the day is 12h and 28min.On the first day of the month, sunrise is at 6:36 am and sunset at 7:42 pm. On the last day of September, in Barnes City, Iowa, sunrise is at 7:06 am and sunset at 6:52 pm CDT.
Sunshine
In September, the average sunshine is 9.3h.UV index
In September, the average daily maximum UV index in Barnes City, Iowa, is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.Note: The UV index of 4 in September translates into these instructions:
Guard yourself - Precautionary measures against sun damage are advocated. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. A hat with a broad brim is indispensable, filtering out up to half of UV rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Barnes City, IA
- 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 (27.3°F).
- Average low temperature in September: 55.8°F
The month with the highest average low temperature is July (64.8°F).
The coldest month (with the lowest average low temperature) is January (14.5°F).
Average pressure in September
Barnes City, IA
- Average pressure in September: 30.02"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in September
Barnes City, IA
- Average wind speed in September: 8.1mph
The windiest months (with the highest average wind speed) are January and April (10.7mph).
The calmest months (with the lowest average wind speed) are July and August (7mph).
Average humidity in September
Barnes City, IA
- Average humidity in September: 77%
The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is October (72%).
Average rainfall in September
Barnes City, IA
- Average rainfall in September: 1.5"
The wettest month (with the highest rainfall) is June (2.36").
The driest month (with the least rainfall) is February (0.55").
Average rainfall days in September
Barnes City, IA
- Average rainfall days in September: 10.7 days
The month with the highest number of rainy days is May (14.8 days).
The month with the least rainy days is February (3.7 days).
Average snowfall in September
Barnes City, IA
- Average snowfall in September: 0"
The month with the highest snowfall is January (1.93").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Barnes City, IA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (9.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Barnes City, IA
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in September: 9h and 18min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days in September
Barnes City, IA
- Average sunshine days in September: 17.5 days
The month with the most sunshine days is November (19.7 days).
The month with the least sunshine days is June (11.6 days).
Average UV index in September
Barnes City, IA
- Average UV index in September: 4
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in September
Barnes City, IA
- Average cloud cover in September: 30
The month with the most cloud cover is January (Cloud cover 56).
The month with the least cloud cover is September (Cloud cover 30).
Average visibility in September
Barnes City, IA
- Average visibility in September: 6mi
The months with the highest visibility are February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, July and August (5mi).
