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
Saint Augustine observes an average high-temperature of a still warm 76.1°F (24.5°C) in September, barely different from 81.1°F (27.3°C) in August. Throughout September, the temperature in Saint Augustine falls to an average low of 56.7°F (13.7°C).Humidity
The average relative humidity in September is 76%.Rainfall
In September, in Saint Augustine, the rain falls for 9.5 days. Throughout September, 1.22" (31mm) of precipitation is accumulated. Throughout the year, there are 126 rainfall days, and 14.45" (367mm) of precipitation is accumulated.Snowfall
In Saint Augustine, snow does not fall in May through September.Daylight
In September, the average length of the day is 12h and 27min.On the first day of the month, sunrise is at 6:29 am and sunset at 7:33 pm. On the last day of September, sunrise is at 6:57 am and sunset at 6:44 pm CDT.
Sunshine
In Saint Augustine, the average sunshine in September is 9.3h.UV index
The average daily maximum UV index in September in Saint Augustine is 4. A UV Index reading of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: In September, the maximum UV index of 4 translates into these guidelines:
Undertake precautions - Guarding against sun damage is counselled. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays.
Frequently asked questions
What are September temperatures in Saint Augustine?
What is the average humidity in September in Saint Augustine?
How much does it rain in Saint Augustine in September?
When it does not snow in Saint Augustine?
Does it snow in Saint Augustine in September?
How many hours of daylight does Saint Augustine have in September?
What time are sunrise and sunset in September in Saint Augustine?
How many hours of sunshine does Saint Augustine have in September?
What is the UV index reading in September in Saint Augustine?
Average temperature in September
Saint Augustine, IL
- Average high temperature in September: 76.1°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (29.8°F).
- Average low temperature in September: 56.7°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (17.8°F).
Average pressure in September
Saint Augustine, 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
Saint Augustine, IL
- Average wind speed in September: 7.8mph
The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest month (with the lowest average wind speed) is August (6.6mph).
Average humidity in September
Saint Augustine, 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
Saint Augustine, IL
- Average rainfall in September: 1.22"
The wettest month (with the highest rainfall) is May (2.2").
The driest months (with the least rainfall) are January and December (0.59").
Average rainfall days in September
Saint Augustine, IL
- Average rainfall days in September: 9.5 days
The month with the highest number of rainy days is May (16.3 days).
The month with the least rainy days is February (4.4 days).
Average snowfall in September
Saint Augustine, IL
- Average snowfall in September: 0"
The month with the highest snowfall is January (1.26").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Saint Augustine, IL
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (10.3 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
Saint Augustine, IL
- Average daylight in September: 12h and 3min
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 months with the most sunshine are June and July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in September
Saint Augustine, IL
- Average sunshine days in September: 18.5 days
The month with the most sunshine days is November (19.6 days).
The month with the least sunshine days is July (11.2 days).
Average UV index in September
Saint Augustine, IL
- 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, November and December (UV index 2).
Average cloud cover in September
Saint Augustine, 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
Saint Augustine, IL
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (6mi).
The month with the lowest visibility is July (5mi).
Saint Augustine, Illinois, USA
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