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
Adel in September experiences a gentle temperature dip, with average high-temperatures reducing from 81.1°F (27.3°C) in August to a still warm 75.4°F (24.1°C). During September, Adel consistently records a temperature low averaging a mild 55.9°F (13.3°C).Humidity
In September, the average relative humidity in Adel is 76%.Rainfall
In Adel, during September, the rain falls for 10.5 days and regularly aggregates up to 1.73" (44mm) of precipitation. In Adel, during the entire year, the rain falls for 112.7 days and collects up to 16.06" (408mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
In September, the average length of the day in Adel, Iowa, is 12h and 28min.On the first day of September in Adel, sunrise is at 6:42 am and sunset at 7:48 pm. On the last day of the month, sunrise is at 7:12 am and sunset at 6:58 pm CDT.
Sunshine
The average sunshine in September in Adel is 9.3h.UV index
In Adel, Iowa, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: In September, the maximum UV index of 4 transforms into these recommendations:
Act with care - Obligation to protect against skin and eye damage is highlighted. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures in Adel?
What is the average humidity in September in Adel?
How many days does it rain in September in Adel?
When it does not snow in Adel?
Does it snow in Adel in September?
How many hours of daylight does Adel have in September?
When is the sunrise / sunset in September in Adel?
How long on average sun shines in September in Adel?
What is the UV index intensity in September in Adel?
Average temperature in September
Adel, IA
- Average high temperature in September: 75.4°F
The warmest month (with the highest average high temperature) is July (82.8°F).
The month with the lowest average high temperature is January (28°F).
- Average low temperature in September: 55.9°F
The month with the highest average low temperature is July (65.1°F).
The coldest month (with the lowest average low temperature) is January (14.4°F).
Average pressure in September
Adel, IA
- Average pressure in September: 30.01"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in September
Adel, IA
- Average wind speed in September: 8.1mph
The windiest months (with the highest average wind speed) are January and April (10.4mph).
The calmest months (with the lowest average wind speed) are July and August (7mph).
Average humidity in September
Adel, IA
- Average humidity in September: 76%
The months with the highest relative humidity are January and February (82%).
The month with the lowest relative humidity is October (70%).
Average rainfall in September
Adel, IA
- Average rainfall in September: 1.73"
The wettest month (with the highest rainfall) is June (2.68").
The driest month (with the least rainfall) is January (0.47").
Average rainfall days in September
Adel, IA
- Average rainfall days in September: 10.5 days
The month with the highest number of rainy days is June (15.7 days).
The month with the least rainy days is February (2.8 days).
Average snowfall in September
Adel, IA
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.09").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Adel, IA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (8.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Adel, 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 12min).
- Average sunshine in September: 9h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 18min).
Average sunshine days in September
Adel, IA
- Average sunshine days in September: 17.5 days
The month with the most sunshine days is November (22.1 days).
The month with the least sunshine days is June (11.9 days).
Average UV index in September
Adel, IA
- Average UV index in September: 4
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in September
Adel, IA
- Average cloud cover in September: 30
The month with the most cloud cover is January (Cloud cover 53).
The month with the least cloud cover is July (Cloud cover 29).
Average visibility in September
Adel, IA
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, September, October, November and December (6mi).
The month with the lowest visibility is August (5mi).
Adel, Iowa, USA
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