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 transition into September, Farmington notes an average high-temperature of a still moderately hot 76.3°F (24.6°C), closely resembling August. In Farmington, the nighttime temperature averages to a moderate 57°F (13.9°C) during September.Humidity
In September, the average relative humidity in Farmington is 76%.Rainfall
In Farmington, in September, during 11.1 rainfall days, 2.48" (63mm) of precipitation is typically accumulated. Throughout the year, there are 145.3 rainfall days, and 28.62" (727mm) of precipitation is accumulated.Snowfall
May through September are months without snowfall.Daylight
In Farmington, Illinois, the average length of the day in September is 12h and 27min.On the first day of the month, sunrise is at 6:27 am and sunset at 7:31 pm. On the last day of September, sunrise is at 6:56 am and sunset at 6:43 pm CDT.
Sunshine
In September, the average sunshine in Farmington is 9.3h.UV index
The average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The daily high UV index of 4 during September translates into the following recommendations:
Ensure safety - Recommendations to avert sunburn are presented. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage.
Frequently asked questions
What are the temperatures in Farmington in September?
What is the average humidity in September in Farmington?
How many days does it rain in September in Farmington?
When it does not snow in Farmington?
Does it snow in Farmington in September?
What is the average length of the day in September in Farmington?
What time are sunrise and sunset in September in Farmington?
How long on average sun shines in September in Farmington?
What is the UV index intensity in September in Farmington?
Average temperature in September
Farmington, IL
- Average high temperature in September: 76.3°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (30.4°F).
- Average low temperature in September: 57°F
The month with the highest average low temperature is July (65.1°F).
The coldest month (with the lowest average low temperature) is January (18.3°F).
Average pressure in September
Farmington, IL
- Average pressure in September: 30.02"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Farmington, IL
- Average wind speed in September: 7.6mph
The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest months (with the lowest average wind speed) are July and August (6.6mph).
Average humidity in September
Farmington, IL
- Average humidity in September: 76%
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (72%).
Average rainfall in September
Farmington, IL
- Average rainfall in September: 2.48"
The wettest month (with the highest rainfall) is May (4.29").
The driest months (with the least rainfall) are February and December (1.42").
Average rainfall days in September
Farmington, IL
- Average rainfall days in September: 11.1 days
The month with the highest number of rainy days is May (18 days).
The month with the least rainy days is February (5.8 days).
Average snowfall in September
Farmington, IL
- Average snowfall in September: 0"
The month with the highest snowfall is January (3.78").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Farmington, IL
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (10.6 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
Farmington, IL
- 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 18min).
- Average sunshine in September: 9h and 2min
The month with the most sunshine is June (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days in September
Farmington, IL
- Average sunshine days in September: 16.8 days
The month with the most sunshine days is November (18.5 days).
The month with the least sunshine days is June (11.3 days).
Average UV index in September
Farmington, IL
- Average UV index in September: 4
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in September
Farmington, IL
- Average cloud cover in September: 29
The month with the most cloud cover is January (Cloud cover 57).
The month with the least cloud cover is September (Cloud cover 29).
Average visibility in September
Farmington, IL
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).
Farmington, Illinois, USA
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