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 82°F (27.8°C) in August to a still warm 75.9°F (24.4°C). Throughout the September nights, Humeston encounters a low-temperature of 56.5°F (13.6°C).Humidity
In September, the average relative humidity is 77%.Rainfall
In September, the rain falls for 11 days. Throughout September, 2.13" (54mm) of precipitation is accumulated. In Humeston, during the entire year, the rain falls for 125.7 days and collects up to 20.39" (518mm) of precipitation.Snowfall
In Humeston, Iowa, snow does not fall in June through September.Daylight
The average length of the day in September is 12h and 27min.On the first day of the month, sunrise is at 6:41 am and sunset at 7:45 pm. On the last day of September, sunrise is at 7:10 am and sunset at 6:57 pm CDT.
Sunshine
In Humeston, the average sunshine in September is 9.3h.UV index
The average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for the average person.Note: The UV index of 4 during September leads to these advisories:
Take necessary precautions - Protection from skin and eye injury is mandatory. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. 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 in Humeston?
What is the average humidity in September in Humeston?
How many days does it rain in September?
When it does not snow?
Does it snow in September?
How many hours of daylight does Humeston have in September?
What time are sunrise and sunset in September?
How long on average sun shines in September?
What is the UV index reading in September?
Average temperature in September
Humeston, IA
- Average high temperature in September: 75.9°F
The warmest month (with the highest average high temperature) is July (83.3°F).
The month with the lowest average high temperature is January (30°F).
- Average low temperature in September: 56.5°F
The month with the highest average low temperature is July (66°F).
The coldest month (with the lowest average low temperature) is January (16.5°F).
Average pressure in September
Humeston, IA
- Average pressure in September: 30.02"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in September
Humeston, IA
- Average wind speed in September: 8mph
The windiest months (with the highest average wind speed) are January and March (10.6mph).
The calmest months (with the lowest average wind speed) are July and August (7mph).
Average humidity in September
Humeston, IA
- Average humidity in September: 77%
The month with the highest relative humidity is June (83%).
The month with the lowest relative humidity is October (72%).
Average rainfall in September
Humeston, IA
- Average rainfall in September: 2.13"
The wettest month (with the highest rainfall) is June (3.31").
The driest months (with the least rainfall) are January and December (0.71").
Average rainfall days in September
Humeston, IA
- Average rainfall days in September: 11 days
The month with the highest number of rainy days is May (16.8 days).
The month with the least rainy days is January (4.5 days).
Average snowfall in September
Humeston, IA
- Average snowfall in September: 0"
The month with the highest snowfall is January (3.23").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Humeston, IA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (8.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Humeston, 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 2min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 18min).
Average sunshine days in September
Humeston, IA
- Average sunshine days in September: 17.2 days
The month with the most sunshine days is November (21.1 days).
The month with the least sunshine days is June (10.7 days).
Average UV index in September
Humeston, 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
Humeston, IA
- Average cloud cover in September: 29
The month with the most cloud cover is January (Cloud cover 52).
The months with the least cloud cover are July, August and September (Cloud cover 29).
Average visibility in September
Humeston, 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).
Humeston, Iowa, USA
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