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 is characterized by a slight reduction in average high-temperature, easing from 84.6°F (29.2°C) in August to a still moderately hot 77.9°F (25.5°C). Throughout September, Iatan records an average temperature of 59.2°F (15.1°C) at night.Humidity
In Iatan, the average relative humidity in September is 75%.Rainfall
In September, in Iatan, Missouri, the rain falls for 12.4 days. Throughout September, 2.52" (64mm) of precipitation is accumulated. Throughout the year, in Iatan, Missouri, there are 130.5 rainfall days, and 26.38" (670mm) of precipitation is accumulated.Snowfall
In Iatan, Missouri, snow does not fall in June through September.Daylight
The average length of the day in September is 12h and 26min.On the first day of the month, sunrise is at 6:49 am and sunset at 7:50 pm. On the last day of September, sunrise is at 7:15 am and sunset at 7:03 pm CDT.
Sunshine
In September, the average sunshine is 9.3h.UV index
In September, the average daily maximum UV index in Iatan is 5. A UV Index reading of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: The daily high UV index of 5 in September translates into this advice:
Take heed. Individuals of lighter complexion can be burned in less than half an hour. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Iatan in September?
What is the average humidity in September in Iatan?
How many days does it rain in September in Iatan?
When it does not snow in Iatan?
Does it snow in Iatan in September?
How many hours of daylight does Iatan have in September?
What time are sunrise and sunset in September in Iatan?
How many hours of sunshine does Iatan have in September?
How high is the UV index in September in Iatan?
Average temperature in September
Iatan, MO
- Average high temperature in September: 77.9°F
The warmest month (with the highest average high temperature) is July (86.4°F).
The month with the lowest average high temperature is January (36.1°F).
- Average low temperature in September: 59.2°F
The month with the highest average low temperature is July (68.4°F).
The coldest month (with the lowest average low temperature) is January (21.9°F).
Average pressure in September
Iatan, MO
- Average pressure in September: 30"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in September
Iatan, MO
- Average wind speed in September: 7.3mph
The windiest months (with the highest average wind speed) are February and March (9.9mph).
The calmest months (with the lowest average wind speed) are July and August (6.5mph).
Average humidity in September
Iatan, MO
- Average humidity in September: 75%
The months with the highest relative humidity are May and June (79%).
The month with the lowest relative humidity is October (69%).
Average rainfall in September
Iatan, MO
- Average rainfall in September: 2.52"
The wettest month (with the highest rainfall) is May (3.94").
The driest month (with the least rainfall) is February (0.87").
Average rainfall days in September
Iatan, MO
- Average rainfall days in September: 12.4 days
The month with the highest number of rainy days is May (16.4 days).
The month with the least rainy days is January (4.3 days).
Average snowfall in September
Iatan, MO
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.32").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Iatan, MO
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (5.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Iatan, MO
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in September: 9h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 5h and 12min).
Average sunshine days in September
Iatan, MO
- Average sunshine days in September: 16.2 days
The month with the most sunshine days is January (22 days).
The month with the least sunshine days is June (12.3 days).
Average UV index in September
Iatan, MO
- Average UV index in September: 5
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Iatan, MO
- Average cloud cover in September: 29
The month with the most cloud cover is March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 26).
Average visibility in September
Iatan, MO
- 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).
Iatan, Missouri, USA
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