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 onset of September marks an average high-temperature of a still warm 78.8°F (26°C), hardly differing from August's 83.1°F (28.4°C). The average low-temperature, in September, is a refreshing 60.6°F (15.9°C).Humidity
The average relative humidity in September in Lancaster is 73%.Rainfall
The month with the least rainfall is September, when the rain falls for 12.3 days and typically collects 1.85" (47mm) of precipitation.Snowfall
In Lancaster, snow does not fall in May through October.Daylight
In Lancaster, the average length of the day in September is 12h and 25min.On the first day of September, sunrise is at 6:21 am and sunset at 7:21 pm. On the last day of the month, sunrise is at 6:47 am and sunset at 6:35 pm CDT.
Sunshine
In September, the average sunshine in Lancaster is 9.1h.UV index
The average daily maximum UV index in September in Lancaster is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: The maximum UV index, 5 during September, leads to the following recommendations:
Put precautions into practice - Ensuring skin and eye safety is a necessity. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. Enhance your sun protection with tightly woven, yet airy clothing.
Frequently asked questions
What are September temperatures in Lancaster?
What is the average humidity in September in Lancaster?
What is the driest month in Lancaster?
How many days does it rain in September in Lancaster?
When it does not snow in Lancaster?
How many hours of daylight does Lancaster have in September?
When is the sunrise / sunset in September in Lancaster?
How long on average sun shines in September in Lancaster?
How high is the UV index in September in Lancaster?
Average temperature in September
Lancaster, IL
- Average high temperature in September: 78.8°F
The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (37.9°F).
- Average low temperature in September: 60.6°F
The month with the highest average low temperature is July (67.5°F).
The coldest month (with the lowest average low temperature) is January (24.8°F).
Average pressure in September
Lancaster, IL
- Average pressure in September: 30.03"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
Lancaster, IL
- Average wind speed in September: 6.7mph
The windiest month (with the highest average wind speed) is February (10.1mph).
The calmest month (with the lowest average wind speed) is July (5.9mph).
Average humidity in September
Lancaster, IL
- Average humidity in September: 73%
The months with the highest relative humidity are May and July (80%).
The month with the lowest relative humidity is October (70%).
Average rainfall in September
Lancaster, IL
- Average rainfall in September: 1.85"
The wettest month (with the highest rainfall) is April (4.72").
The driest month (with the least rainfall) is September (1.85").
Average rainfall days in September
Lancaster, IL
- Average rainfall days in September: 12.3 days
The month with the highest number of rainy days is May (18.3 days).
The month with the least rainy days is January (9.4 days).
Average snowfall in September
Lancaster, IL
- Average snowfall in September: 0"
The month with the highest snowfall is January (1.46").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Lancaster, IL
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (6.8 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Lancaster, IL
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in September: 9h and 1min
The month with the most sunshine is June (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 4h and 18min).
Average sunshine days in September
Lancaster, IL
- Average sunshine days in September: 15.9 days
The month with the most sunshine days is October (18.5 days).
The month with the least sunshine days is May (10.3 days).
Average UV index in September
Lancaster, 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, November and December (UV index 2).
Average cloud cover in September
Lancaster, IL
- Average cloud cover in September: 29
The month with the most cloud cover is January (Cloud cover 53).
The months with the least cloud cover are June and August (Cloud cover 28).
Average visibility in September
Lancaster, 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).
Lancaster, Illinois, USA
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