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's onset introduces a mild reduction in the average high-temperature, from 82.6°F (28.1°C) in August to a still moderately hot 76.6°F (24.8°C). The nighttime temperature in Council Bluffs dips to a mild 57°F (13.9°C) on average during September.Humidity
In Council Bluffs, the average relative humidity in September is 72%.Rainfall
In Council Bluffs, during September, the rain falls for 12 days and regularly aggregates up to 2.09" (53mm) of precipitation. Throughout the year, there are 122.5 rainfall days, and 22.52" (572mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall in Council Bluffs.Daylight
In Council Bluffs, Iowa, 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 7:55 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 7:06 pm CDT.
Sunshine
In September, the average sunshine is 9h.UV index
In September, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for average individuals.Note: The UV index of 5 in September translates into these instructions:
Exercise caution. Those with pale skin may experience burns in less than half an hour. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature?
What is the average humidity in September?
How many days does it rain in September?
When it does not snow?
Does it snow in September?
How many hours of daylight does Council Bluffs have in September?
When are sunrise and sunset in September?
How long on average sun shines in September in Council Bluffs?
What is the UV index intensity in September?
Average temperature in September
Council Bluffs, IA
- Average high temperature in September: 76.6°F
The warmest month (with the highest average high temperature) is July (84.4°F).
The month with the lowest average high temperature is January (30°F).
- Average low temperature in September: 57°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 (16.3°F).
Average pressure in September
Council Bluffs, 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
Council Bluffs, IA
- Average wind speed in September: 8.3mph
The windiest month (with the highest average wind speed) is April (10.5mph).
The calmest month (with the lowest average wind speed) is July (7mph).
Average humidity in September
Council Bluffs, IA
- Average humidity in September: 72%
The month with the highest relative humidity is January (80%).
The month with the lowest relative humidity is October (66%).
Average rainfall in September
Council Bluffs, IA
- Average rainfall in September: 2.09"
The wettest month (with the highest rainfall) is June (3.86").
The driest month (with the least rainfall) is January (0.59").
Average rainfall days in September
Council Bluffs, IA
- Average rainfall days in September: 12 days
The month with the highest number of rainy days is May (16.3 days).
The month with the least rainy days is February (3 days).
Average snowfall in September
Council Bluffs, IA
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.56").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Council Bluffs, 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
Council Bluffs, IA
- Average daylight in September: 12h and 3min
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 18min).
- Average sunshine in September: 9h and 0min
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 42min).
Average sunshine days in September
Council Bluffs, IA
- Average sunshine days in September: 16.6 days
The month with the most sunshine days is November (21.1 days).
The month with the least sunshine days is June (10.9 days).
Average UV index in September
Council Bluffs, 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
Council Bluffs, IA
- Average cloud cover in September: 28
The month with the most cloud cover is January (Cloud cover 48).
The month with the least cloud cover is July (Cloud cover 26).
Average visibility in September
Council Bluffs, 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).
Council Bluffs, Iowa, USA
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