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
The onset of September results in a small decrease in the average high-temperature, moderately receding from a warm 81.9°F (27.7°C) in August to a still moderately hot 76.3°F (24.6°C). In Logan, September nights witness a steady temperature drop to a moderate 56.3°F (13.5°C).Humidity
In September, the average relative humidity is 72%.Rainfall
In Logan, during September, the rain falls for 12.3 days and regularly aggregates up to 2.24" (57mm) of precipitation. In Logan, Iowa, during the entire year, the rain falls for 123.1 days and collects up to 23.39" (594mm) of precipitation.Snowfall
June through September are months without snowfall in Logan, Iowa.Daylight
The average length of the day in September is 12h and 28min.On the first day of the month, sunrise is at 6:49 am and sunset at 7:55 pm. On the last day of September, sunrise is at 7:19 am and sunset at 7:06 pm CDT.
Sunshine
The average sunshine in September is 9.1h.UV index
In September, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: The UV index of 5 during September leads to these advisories:
Undertake precautions - Guarding against sun damage is counselled. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures?
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?
What is the average length of the day in September?
When are sunrise and sunset in September?
How many hours of sunshine does Logan have in September?
How high is the UV index in September?
Average temperature in September
Logan, 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
Logan, 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
Logan, 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
Logan, 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
Logan, 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
Logan, 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
Logan, 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
Logan, 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
Logan, 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 1min
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
Logan, 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
Logan, 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
Logan, 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
Logan, 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).
Logan, Iowa, USA
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