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 transition from August to September sees an average high-temperature of a still hot 87.4°F (30.8°C), indicating a minor variance from the prior month. During September nights, Iowa records an average temperature of 71.2°F (21.8°C).Heat index
For most parts of September, the heat index is evaluated at a fiery hot 102.2°F (39°C). Implement enhanced safety actions, heat cramps and heat exhaustion could occur. Sustained activity might result in heatstroke.In terms of the heat index, values are set with light wind and shade conditions in mind. If exposed to direct sunlight, the heat index could climb by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', binds temperature metrics with humidity values to give a sense of the actual warmth. Elements such as metabolic variations, being pregnant, and physical activity can impact one's weather perception. In direct sunlight, the heat's impact can be heightened, potentially leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. Young kids are often more at risk than adults as they tend to perspire less. Besides, their skin surface is larger relative to their small bodies, and their increased heat output from their active lifestyle compounds their risk.
To cool down, the human body relies on perspiration, a process where excessive heat is eliminated as sweat evaporates. A higher relative humidity affects normal body cooling by reducing the evaporation rate, subsequently lowering the rate at which the body cools and increasing the perception of heat. As the body gains more heat than it can dissipate, there's a risk of increasing temperatures and resultant overheating.
Humidity
In September, the average relative humidity is 77%.Rainfall
In Iowa, Louisiana, during September, the rain falls for 19.1 days and regularly aggregates up to 3.5" (89mm) of precipitation. In Iowa, during the entire year, the rain falls for 182.1 days and collects up to 39.25" (997mm) of precipitation.Snowfall
February through November are months without snowfall in Iowa.Daylight
The average length of the day in September is 12h and 20min.On the first day of the month, sunrise is at 6:49 am and sunset at 7:34 pm. On the last day of September, in Iowa, Louisiana, sunrise is at 7:05 am and sunset at 6:58 pm CDT.
Sunshine
The average sunshine in September in Iowa is 9.8h.UV index
The average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.Note: The daily maximum UV index of 6 in September interprets into the following advice:
Guard oneself from overexposure. Defence against sun injury is vital. Stay in the shade and limit direct sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its strongest. Remember, however, that not all shade structures provide full sun protection. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.
Frequently asked questions
How hot is it in Iowa in September?
What is the average humidity in September in Iowa?
How much does it rain in Iowa in September?
When it does not snow in Iowa?
How many hours of daylight does Iowa have in September?
What time are sunrise and sunset in September in Iowa?
How many hours of sunshine does Iowa have in September?
How high is the UV index in September in Iowa?
Average temperature in September
Iowa, LA
- Average high temperature in September: 87.4°F
The warmest month (with the highest average high temperature) is August (91.4°F).
The month with the lowest average high temperature is January (59.4°F).
- Average low temperature in September: 71.2°F
The month with the highest average low temperature is July (75.7°F).
The coldest month (with the lowest average low temperature) is January (44.4°F).
Average pressure in September
Iowa, LA
- Average pressure in September: 29.96"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The months with the lowest atmospheric pressure are June and August (29.94"Hg).
Average wind speed in September
Iowa, LA
- Average wind speed in September: 6.3mph
The windiest month (with the highest average wind speed) is April (9.3mph).
The calmest month (with the lowest average wind speed) is August (6mph).
Average humidity in September
Iowa, LA
- Average humidity in September: 77%
The month with the highest relative humidity is February (81%).
The month with the lowest relative humidity is October (72%).
Average rainfall in September
Iowa, LA
- Average rainfall in September: 3.5"
The wettest month (with the highest rainfall) is August (5.75").
The driest month (with the least rainfall) is February (2.32").
Average rainfall days in September
Iowa, LA
- Average rainfall days in September: 19.1 days
The month with the highest number of rainy days is August (22.2 days).
The month with the least rainy days is November (10.1 days).
Average snowfall in September
Iowa, LA
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.2").
The months with the least snowfall are February, March, April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Iowa, LA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (0.3 days).
The months with the least snowfall days are February, March, April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Iowa, LA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 6min).
The month with the shortest days is December (Average daylight: 10h and 12min).
- Average sunshine in September: 9h and 5min
The month with the most sunshine is June (Average sunshine: 10h and 36min).
The month with the least sunshine is December (Average sunshine: 5h and 6min).
Average sunshine days in September
Iowa, LA
- Average sunshine days in September: 10.2 days
The month with the most sunshine days is November (18.5 days).
The month with the least sunshine days is August (7.3 days).
Average UV index in September
Iowa, LA
- Average UV index in September: 6
The months with the highest UV index are May, June, July and August (UV index 7).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in September
Iowa, LA
- Average cloud cover in September: 28
The month with the most cloud cover is February (Cloud cover 48).
The month with the least cloud cover is October (Cloud cover 25).
Average visibility in September
Iowa, LA
- 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).
Iowa, Louisiana, USA
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