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
With the onset of September, the average high-temperature subtly recedes from August's warm 79.9°F (26.6°C) to a still moderately hot 74.3°F (23.5°C). An average nighttime temperature of 56.8°F (13.8°C) is witnessed throughout September.Humidity
The average relative humidity in September in Irondale is 78%.Rainfall
In Irondale, during September, the rain falls for 13.2 days and regularly aggregates up to 1.54" (39mm) of precipitation. In Irondale, during the entire year, the rain falls for 146.5 days and collects up to 22.32" (567mm) of precipitation.Snowfall
In Irondale, snow does not fall in May through September.Daylight
In September, the average length of the day is 12h and 26min.On the first day of September, sunrise is at 7:11 am and sunset at 8:13 pm. On the last day of the month, sunrise is at 7:38 am and sunset at 7:26 pm EDT.
Sunshine
In September, the average sunshine in Irondale, Indiana, is 8.2h.UV index
The average daily maximum UV index in September in Irondale, Indiana, is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for average individuals.Note: In September, the average maximum UV index of 4 translates into the following recommendations:
Ensure safety - Imperative it is to shield skin and eyes from damage. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Irondale in September?
What is the average humidity in September in Irondale?
How many days does it rain in September in Irondale?
When it does not snow in Irondale?
Does it snow in Irondale in September?
How many hours of daylight does Irondale have in September?
When is the sunrise / sunset in September in Irondale?
How long on average sun shines in September in Irondale?
How high is the UV index in September in Irondale?
Average temperature in September
Irondale, IN
- Average high temperature in September: 74.3°F
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (32.2°F).
- Average low temperature in September: 56.8°F
The month with the highest average low temperature is July (64.6°F).
The coldest month (with the lowest average low temperature) is January (20.5°F).
Average pressure in September
Irondale, IN
- Average pressure in September: 30.03"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Irondale, IN
- Average wind speed in September: 6.8mph
The windiest month (with the highest average wind speed) is January (10.4mph).
The calmest months (with the lowest average wind speed) are July and August (6mph).
Average humidity in September
Irondale, IN
- Average humidity in September: 78%
The months with the highest relative humidity are January and December (83%).
The month with the lowest relative humidity is October (74%).
Average rainfall in September
Irondale, IN
- Average rainfall in September: 1.54"
The wettest month (with the highest rainfall) is May (2.8").
The driest month (with the least rainfall) is February (1.22").
Average rainfall days in September
Irondale, IN
- Average rainfall days in September: 13.2 days
The month with the highest number of rainy days is May (18.1 days).
The month with the least rainy days is February (6.3 days).
Average snowfall in September
Irondale, IN
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.24").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Irondale, IN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (9.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Irondale, IN
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in September: 8h and 1min
The month with the most sunshine is June (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in September
Irondale, IN
- Average sunshine days in September: 14.3 days
The month with the most sunshine days is November (18.4 days).
The month with the least sunshine days is May (10.7 days).
Average UV index in September
Irondale, IN
- Average UV index in September: 4
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, March, October, November and December (UV index 2).
Average cloud cover in September
Irondale, IN
- Average cloud cover in September: 35
The month with the most cloud cover is January (Cloud cover 62).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in September
Irondale, IN
- 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).
Irondale, Indiana, USA
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