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 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
As August transitions into September, Lombard records an average high-temperature of a moderately hot 84.7°F (29.3°C), showing a gentle shift from the preceding month. In September, Lombard reports a consistent average low-temperature of 68°F (20°C) during the nights.Heat index
The average heat index in September is calculated to be a fiery hot 95°F (35°C). Adopt enhanced safety measures, heat exhaustion and heat cramps could occur. Continuous activity may induce heatstroke.Metrics for the heat index primarily focus on shaded spots and light wind conditions. The heat index might be elevated by 15 Fahrenheit (8 Celsius) degrees due to direct sun exposure.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is a value derived by merging air temperature with the humidity to convey how the climate feels. The perception of temperature can be subjective, varying based on activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. Take note that direct exposure to the sun can increase the felt temperature, possibly adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are highly critical to babies and toddlers. Children often miss understanding the importance of rest and rehydration. Thirst usually appears late during dehydration - therefore, maintaining hydration, particularly during long physical activities, is essential.
For the human body, perspiration is the go-to method to regulate temperature, using sweat's evaporation to dissipate warmth. Relative humidity in excess curtails evaporation, therefore reducing heat dissipation from the body, leading to feelings of excess heat. Heat-related disorders may develop if heat gain in the body overshadows its cooling capacity, leading to elevated temperatures.
Humidity
In Lombard, the average relative humidity in September is 76%.Rainfall
In Lombard, in September, it is raining for 13.3 days, with typically 0.94" (24mm) of accumulated precipitation. Throughout the year, there are 132.8 rainfall days, and 15.24" (387mm) of precipitation is accumulated.Snowfall
April through November are months without snowfall.Daylight
In Lombard, Georgia, the average length of the day in September is 12h and 22min.On the first day of September, sunrise is at 7:04 am and sunset at 7:53 pm. On the last day of the month, sunrise is at 7:23 am and sunset at 7:14 pm EDT.
Sunshine
The average sunshine in September is 8.6h.UV index
The average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV radiation for ordinary individuals.Note: An average UV index of 6 in September transforms into this advice:
Undertake precautions and comply with sun safety standards. Protection from skin and eye injury is vital. Limit your exposure to the sun's UV radiation, which is strongest between 10 a.m. and 4 p.m., and note that parasols or canopies may not provide full sun protection. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is it in September?
What is the average humidity in September?
How many days does it rain in September?
When it does not snow?
How many hours of daylight does Lombard have in September?
What time are sunrise and sunset in September?
How many hours of sunshine does Lombard have in September?
What is the UV index intensity in September?
Average temperature in September
Lombard, GA
- Average high temperature in September: 84.7°F
The warmest month (with the highest average high temperature) is July (90.5°F).
The month with the lowest average high temperature is January (55.9°F).
- Average low temperature in September: 68°F
The month with the highest average low temperature is July (73.2°F).
The coldest month (with the lowest average low temperature) is January (39.7°F).
Average pressure in September
Lombard, GA
- Average pressure in September: 30"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The months with the lowest atmospheric pressure are June and August (29.98"Hg).
Average wind speed in September
Lombard, GA
- Average wind speed in September: 6.2mph
The windiest months (with the highest average wind speed) are March and April (8.2mph).
The calmest month (with the lowest average wind speed) is August (5.7mph).
Average humidity in September
Lombard, GA
- Average humidity in September: 76%
The month with the highest relative humidity is December (77%).
The months with the lowest relative humidity are January and November (71%).
Average rainfall in September
Lombard, GA
- Average rainfall in September: 0.94"
The wettest month (with the highest rainfall) is August (2.17").
The driest month (with the least rainfall) is November (0.63").
Average rainfall days in September
Lombard, GA
- Average rainfall days in September: 13.3 days
The month with the highest number of rainy days is July (17.3 days).
The month with the least rainy days is November (5.6 days).
Average snowfall days in September
Lombard, GA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (0.2 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Lombard, GA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 12min).
The month with the shortest days is December (Average daylight: 10h and 6min).
- Average sunshine in September: 8h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 18min).
Average sunshine days in September
Lombard, GA
- Average sunshine days in September: 14.1 days
The month with the most sunshine days is November (22.9 days).
The month with the least sunshine days is June (10.6 days).
Average UV index in September
Lombard, GA
- Average UV index in September: 6
The months with the highest UV index are June, July and August (UV index 7).
The months with the lowest UV index are January and December (UV index 3).
Average cloud cover in September
Lombard, GA
- Average cloud cover in September: 32
The months with the most cloud cover are February and December (Cloud cover 41).
The month with the least cloud cover is October (Cloud cover 28).
Average visibility in September
Lombard, GA
- 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).
Lombard, Georgia, USA
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