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 arrival of September coincides with an average high-temperature of a moderately hot 81.5°F (27.5°C), indicating a minimal shift from August's 86.4°F (30.2°C). In September, Tamms encounters an average low-temperature of 61.9°F (16.6°C) during the night.Heat index
The heat index in September is estimated at a hot 86°F (30°C). Fatigue might occur with continuous exposure and activity, potentially causing heat cramps.Be aware that heat index ratings are designed for shaded locations and minor breezes. A direct sunlight exposure may boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. An individual's perception of weather can be affected by a variety of elements including metabolic differences, being pregnant, and their level of physical exertion. Always consider that direct sunlight exposure might heighten the heat's effects, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. Youngsters frequently overlook the need for breaks and fluid intake. Thirst is an advanced sign of dehydration - thereby highlighting the importance of keeping hydrated, particularly during long physical activities.
Humidity
In Tamms, the average relative humidity in September is 72%.Rainfall
The month with the least rainfall in Tamms is September, when the rain falls for 11.4 days and typically collects 1.42" (36mm) of precipitation.Snowfall
May through September are months without snowfall in Tamms.Daylight
In Tamms, the average length of the day in September is 12h and 25min.On the first day of September in Tamms, Illinois, sunrise is at 6:28 am and sunset at 7:25 pm. On the last day of the month, sunrise is at 6:52 am and sunset at 6:41 pm CDT.
Sunshine
In September, the average sunshine in Tamms is 9.6h.UV index
In Tamms, Illinois, the average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: In September, the maximum UV index of 5 suggests this advice:
Exercise prevention - Protecting skin and eyes from harm is required. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage.
Frequently asked questions
What is the usual temperature for Tamms in September?
What is the average humidity in September in Tamms?
What is the driest month in Tamms?
How many days does it rain in September in Tamms?
When it does not snow in Tamms?
Does it snow in Tamms in September?
How many hours of daylight does Tamms have in September?
When is the sunrise / sunset in September in Tamms?
How many hours of sunshine does Tamms have in September?
How high is the UV index in September in Tamms?
Average temperature in September
Tamms, IL
- Average high temperature in September: 81.5°F
The warmest month (with the highest average high temperature) is July (88.2°F).
The month with the lowest average high temperature is January (41.2°F).
- Average low temperature in September: 61.9°F
The month with the highest average low temperature is July (69.8°F).
The coldest month (with the lowest average low temperature) is January (28.4°F).
Average pressure in September
Tamms, IL
- 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 (29.94"Hg).
Average wind speed in September
Tamms, IL
- Average wind speed in September: 6.3mph
The windiest months (with the highest average wind speed) are January, February and March (9.1mph).
The calmest months (with the lowest average wind speed) are July and August (5.7mph).
Average humidity in September
Tamms, IL
- Average humidity in September: 72%
The months with the highest relative humidity are February, March, May and December (78%).
The month with the lowest relative humidity is October (69%).
Average rainfall in September
Tamms, IL
- Average rainfall in September: 1.42"
The wettest month (with the highest rainfall) is April (4.21").
The driest month (with the least rainfall) is September (1.42").
Average rainfall days in September
Tamms, IL
- Average rainfall days in September: 11.4 days
The month with the highest number of rainy days is May (17.1 days).
The month with the least rainy days is January (9.8 days).
Average snowfall in September
Tamms, IL
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.5").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Tamms, IL
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (3.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Tamms, IL
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in September: 9h and 4min
The month with the most sunshine is June (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in September
Tamms, IL
- Average sunshine days in September: 16.5 days
The month with the most sunshine days is October (18.5 days).
The month with the least sunshine days is May (12.3 days).
Average UV index in September
Tamms, IL
- 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 and December (UV index 2).
Average cloud cover in September
Tamms, IL
- Average cloud cover in September: 27
The month with the most cloud cover is February (Cloud cover 49).
The month with the least cloud cover is June (Cloud cover 26).
Average visibility in September
Tamms, IL
- 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).
Tamms, Illinois, USA
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