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Contents
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average snowfall
- Average snowfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
Weather in January
January, like December, in Lancaster, Illinois, is an icy winter month, with an average temperature ranging between max 37.9°F (3.3°C) and min 24.8°F (-4°C). January proves to be the coldest month, recording an average maximum temperature of 37.9°F (3.3°C) and a minimum temperature of 24.8°F (-4°C). Weather in January »
Weather in February
The last month of the winter, February, is a chilly month in Lancaster, Illinois, with an average temperature varying between 43°F (6.1°C) and 29.1°F (-1.6°C). Shifting into February, Lancaster records an average high-temperature of a frosty 43°F (6.1°C), presenting minor fluctuations compared to the previous month. Weather in February »
Weather in March
March, the first month of the spring in Lancaster, is a cool month, with an average temperature fluctuating between 38.3°F (3.5°C) and 53.8°F (12.1°C). Lancaster sees a rise in temperature during March, with average high-temperatures transitioning from a chilly 43°F (6.1°C) in February to a cool 53.8°F (12.1°C). Weather in March »
Weather in April
April in Lancaster, Illinois, is a comfortable spring month, with an average temperature varying between 48.2°F (9°C) and 64.9°F (18.3°C). In Lancaster, the onset of April comes with an increased average high-temperature, moving from March's fresh 53.8°F (12.1°C) to a comfortable 64.9°F (18.3°C). Weather in April »
Weather in May
The last month of the spring, May, is a moderately hot month in Lancaster, Illinois, with an average temperature varying between 74.3°F (23.5°C) and 58.1°F (14.5°C). Lancaster in May experiences an increase in the average high-temperature, moving from April's enjoyable 64.9°F (18.3°C) to a warm 74.3°F (23.5°C). Weather in May »
Weather in June
June, the first month of the summer in Lancaster, is also a moderately hot month, with an average temperature ranging between max 82.9°F (28.3°C) and min 65.8°F (18.8°C). Lancaster observes a slight ascent in average high-temperatures during June, adjusting from 74.3°F (23.5°C) in May to a still moderately hot 82.9°F (28.3°C). Weather in June »
Weather in July
July, like June, in Lancaster, Illinois, is another warm summer month, with an average temperature fluctuating between 84.7°F (29.3°C) and 67.5°F (19.7°C). The warmest temperatures occur during July, when averages reach a peak of 84.7°F (29.3°C) and a low of 67.5°F (19.7°C). The heat index in July is appraised at a fiery hot 96.8°F (36°C). Weather in July »
Weather in August
August, the last month of the summer in Lancaster, is another warm month, with temperature in the range of an average low of 65.7°F (18.7°C) and an average high of 83.1°F (28.4°C). The beginning of August records an average high-temperature of a still warm 83.1°F (28.4°C), marking a negligible difference from July's 84.7°F (29.3°C). Weather in August »
Weather in September
The first month of the autumn, September, is still a warm month in Lancaster, Illinois, with an average temperature varying between 78.8°F (26°C) and 60.6°F (15.9°C). A minor adjustment in Lancaster's average high-temperature is noted with the start of September, touching a still moderately hot 78.8°F (26°C) from August's 83.1°F (28.4°C). Weather in September »
Weather in October
October, the same as September, is another enjoyable autumn month in Lancaster, Illinois, with temperature in the range of an average high of 66.6°F (19.2°C) and an average low of 49.6°F (9.8°C). Transition from September to October is accompanied by a temperature drop, with average high-temperatures decreasing from a warm 78.8°F (26°C) to a refreshing 66.6°F (19.2°C). Weather in October »
Weather in November
November, the last month of the autumn in Lancaster, is another cool month, with temperature in the range of an average low of 38.3°F (3.5°C) and an average high of 52.9°F (11.6°C). With November's arrival, Lancaster's weather changes as the average high-temperature falls from a refreshing 66.6°F (19.2°C) in October to a cool 52.9°F (11.6°C). Weather in November »
Weather in December
December, the first month of the winter in Lancaster, is also a frosty month, with an average temperature varying between 42.8°F (6°C) and 31.3°F (-0.4°C). The start of December involves a temperature drop, moving from a fresh 52.9°F (11.6°C) in November to a frosty 42.8°F (6°C). Weather in December »
Updated: Aug 31, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What part of the year is the coldest?
The lowest temperatures are recorded in January, with averages reaching a high of 37.9°F (3.3°C) and a low of 24.8°F (-4°C).
How many days does it rain?
Throughout the year, there are 155.6 rainfall days, and 34.65" (880mm) of precipitation is accumulated.
When does it snow?
Months with snowfall are January through April, November and December.
What is the snowiest month in Lancaster?
The month with the most snowfall is January, when snow falls for 6.8 days and typically aggregates up to 1.46" (37mm) of snow.
How much does it snow?
In Lancaster, during the entire year, snow falls for 21 days and aggregates up to 5.39" (137mm) of snow.
What is the month with the least sunshine?
January has the least sunshine of the year in Lancaster, with an average of 4.3h of sunshine.
What are the months with the lowest UV index?
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index.
When is Daylight Saving Time (DST)?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from CST to CDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from CDT to CST.
What is the wettest month?
The month with the most rainfall is April, when the rain falls for 16.4 days and typically aggregates up to 4.72" (120mm) of precipitation.
What is the most humid month?
May and July, with an average relative humidity of 80%, are most humid months.
When it does not snow in Lancaster?
May through October are months without snowfall.
When is the highest UV index?
The months with the highest UV index are May through August, with an average maximum UV index of 6.
When are the longest days?
With an average of 14h and 48min of daylight, June has the longest days of the year.
What month has the most sunshine?
The month with the most sunshine in Lancaster is June, with an average of 10.6h of sunshine.
What is the hottest time of year?
July, with average temperatures reaching a high of 84.7°F (29.3°C) and a low of 67.5°F (19.7°C), is the warmest month.
What is the driest month?
The month with the least rainfall is September, when the rain falls for 12.3 days and typically collects 1.85" (47mm) of precipitation.
What is the least humid month?
With an average relative humidity of 70%, October is the least humid month.
What is the month with the shortest days?
The month with the shortest days is December, with an average of 9h and 30min of daylight.
Average temperature
Lancaster, IL
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).
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
Lancaster, IL
- Average pressure in January:
30.16"Hg - Average pressure in February:
30.12"Hg - Average pressure in March:
30.08"Hg - Average pressure in April:
29.96"Hg - Average pressure in May:
29.97"Hg - Average pressure in June:
29.94"Hg
- Average pressure in July:
29.98"Hg - Average pressure in August:
29.99"Hg - Average pressure in September:
30.03"Hg - Average pressure in October:
30.04"Hg - Average pressure in November:
30.14"Hg - Average pressure in December:
30.14"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
Lancaster, IL
- Average wind speed in January:
10mph - Average wind speed in February:
10.1mph - Average wind speed in March:
9.9mph - Average wind speed in April:
9.9mph - Average wind speed in May:
8.3mph - Average wind speed in June:
7.1mph
- Average wind speed in July:
5.9mph - Average wind speed in August:
6mph - Average wind speed in September:
6.7mph - Average wind speed in October:
8.6mph - Average wind speed in November:
9.1mph - Average wind speed in December:
9.4mph
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
Lancaster, IL
The months with the highest relative humidity are May and July (80%).
The month with the lowest relative humidity is October (70%).
Average rainfall
Lancaster, IL
- Average rainfall in January:
2.44" - Average rainfall in February:
2.48" - Average rainfall in March:
3.11" - Average rainfall in April:
4.72" - Average rainfall in May:
3.5" - Average rainfall in June:
3.5"
- Average rainfall in July:
2.91" - Average rainfall in August:
2.32" - Average rainfall in September:
1.85" - Average rainfall in October:
2.48" - Average rainfall in November:
2.72" - Average rainfall in December:
2.6"
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
Lancaster, IL
- Average rainfall days in January:
9.4 days - Average rainfall days in February:
9.6 days - Average rainfall days in March:
14.9 days - Average rainfall days in April:
16.4 days - Average rainfall days in May:
18.3 days - Average rainfall days in June:
14.1 days
- Average rainfall days in July:
16.8 days - Average rainfall days in August:
12.8 days - Average rainfall days in September:
12.3 days - Average rainfall days in October:
10.8 days - Average rainfall days in November:
9.9 days - Average rainfall days in December:
10.3 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
Lancaster, IL
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
Lancaster, IL
- Average snowfall days in January:
6.8 days - Average snowfall days in February:
6 days - Average snowfall days in March:
2.6 days - Average snowfall days in April:
0.3 days - Average snowfall days in May:
0 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0 days - Average snowfall days in November:
1.1 days - Average snowfall days in December:
4.2 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 / Average sunshine
Lancaster, IL
- Average daylight in January:
9h and 5min - Average daylight in February:
10h and 5min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 1min - Average daylight in May:
14h and 2min - Average daylight in June:
14h and 5min
- Average daylight in July:
14h and 3min - Average daylight in August:
13h and 4min - Average daylight in September:
12h and 2min - Average daylight in October:
11h and 1min - Average daylight in November:
10h and 1min - Average daylight in December:
9h and 3min
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 January:
4h and 2min - Average sunshine in February:
4h and 3min - Average sunshine in March:
6h and 2min - Average sunshine in April:
8h and 2min - Average sunshine in May:
9h and 1min - Average sunshine in June:
10h and 4min
- Average sunshine in July:
10h and 2min - Average sunshine in August:
10h and 2min - Average sunshine in September:
9h and 1min - Average sunshine in October:
6h and 5min - Average sunshine in November:
5h and 3min - Average sunshine in December:
4h and 4min
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
Lancaster, IL
- Average sunshine days in January:
15.8 days - Average sunshine days in February:
13.1 days - Average sunshine days in March:
12.5 days - Average sunshine days in April:
11.8 days - Average sunshine days in May:
10.3 days - Average sunshine days in June:
12.8 days
- Average sunshine days in July:
12.3 days - Average sunshine days in August:
15.8 days - Average sunshine days in September:
15.9 days - Average sunshine days in October:
18.5 days - Average sunshine days in November:
17.5 days - Average sunshine days in December:
16.6 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
Lancaster, IL
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
Lancaster, IL
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
Lancaster, IL
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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