Climate and monthly weather forecastLafayette, IL
Climate and monthly weather forecast
Weather in January
January, the same as December, in Lafayette, Illinois, is a freezing cold winter month, with an average temperature fluctuating between 28.8°F (-1.8°C) and 16.7°F (-8.5°C). The coldest temperatures occur during January, when averages reach a peak of 28.8°F (-1.8°C) and a low of 16.7°F (-8.5°C). Weather in January »Weather in February
February, the last month of the winter in Lafayette, is an icy month, with an average temperature fluctuating between 33.3°F (0.7°C) and 20.5°F (-6.4°C). Lafayette experiences an average high-temperature of a wintry 33.3°F (0.7°C) in February, subtly different from January's 28.8°F (-1.8°C). Weather in February »Weather in March
The first month of the spring, March, is a chilly month in Lafayette, Illinois, with an average temperature fluctuating between 47.1°F (8.4°C) and 32.4°F (0.2°C). March shows a rise in the average high-temperature, moving from February's icy 33.3°F (0.7°C) to a chilly 47.1°F (8.4°C). Weather in March »Weather in April
April in Lafayette, Illinois, is a moderate spring month, with an average temperature ranging between min 42.4°F (5.8°C) and max 59.2°F (15.1°C). The onset of April brings a rise in the average high-temperature, elevating from a frosty 47.1°F (8.4°C) in March to a refreshing 59.2°F (15.1°C). Weather in April »Weather in May
The last month of the spring, May, is an agreeable month in Lafayette, Illinois, with an average temperature ranging between max 70.7°F (21.5°C) and min 53.6°F (12°C). As Lafayette transitions into May, the average high-temperature shows a change, moving from a moderate 59.2°F (15.1°C) in April to a pleasant 70.7°F (21.5°C). Weather in May »Weather in June
The first month of the summer, June, is a moderately hot month in Lafayette, Illinois, with an average temperature ranging between min 62.1°F (16.7°C) and max 78.6°F (25.9°C). June brings a slight rise in Lafayette's average high-temperature, moving from a pleasant 70.7°F (21.5°C) in May to a warm 78.6°F (25.9°C). Weather in June »Weather in July
July, the same as June, is another warm summer month in Lafayette, Illinois, with temperature in the range of an average high of 81°F (27.2°C) and an average low of 64.6°F (18.1°C). July stands out as Lafayette's warmest month, with an average high-temperature of 81°F (27.2°C) and a low-temperature of 64.6°F (18.1°C). The heat index value for July is calculated to be a tropical 87.8°F (31°C). Weather in July »Weather in August
The last month of the summer, August, is also a moderately hot month in Lafayette, Illinois, with an average temperature fluctuating between 80.1°F (26.7°C) and 62.6°F (17°C). The shift from July to August is characterized by an average high-temperature of a still warm 80.1°F (26.7°C), not significantly different from the 81°F (27.2°C) of July. Weather in August »Weather in September
September, the first month of the autumn in Lafayette, is still a warm month, with an average temperature ranging between min 56.3°F (13.5°C) and max 74.8°F (23.8°C). As September takes its course, Lafayette's average high-temperature registers at a still warm 74.8°F (23.8°C), closely aligning with the preceding month. Weather in September »Weather in October
October, the same as September, is another refreshing autumn month in Lafayette, Illinois, with an average temperature fluctuating between 45.5°F (7.5°C) and 61.3°F (16.3°C). The onset of October results in a decrease in the average high-temperature, receding from a warm 74.8°F (23.8°C) in September to a refreshing 61.3°F (16.3°C). Weather in October »Weather in November
November, the last month of the autumn in Lafayette, is another chilly month, with an average temperature ranging between max 47.1°F (8.4°C) and min 33.4°F (0.8°C). Start of November brings a shift in the average high-temperature, falling from October's refreshing 61.3°F (16.3°C) to a chilly 47.1°F (8.4°C). Weather in November »Weather in December
The first month of the winter, December, is also an icy month in Lafayette, Illinois, with an average temperature ranging between min 24.1°F (-4.4°C) and max 34.7°F (1.5°C). The commencement of December involves a temperature shift, with the average high-temperature dropping from a chilly 47.1°F (8.4°C) in November to a wintry 34.7°F (1.5°C). Weather in December »Updated: Jul 21, 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
January, with average temperatures reaching a high of 28.8°F (-1.8°C) and a low of 16.7°F (-8.5°C), is the coldest month.
The months with the least rainfall are January and December Rain falls for 6.1 days and accumulates 1.42" (36mm) of rain.
Throughout the year, there are 147.2 rainfall days, and 29.17" (741mm) of precipitation is accumulated.
Months with snowfall in Lafayette are January through April, October through December.
January is the month with the most snowfall. Snow falls for 11.4 days and accumulates 3.66" (93mm) of snow.
Throughout the year, there are 37 snowfall days, and 12.91" (328mm) of snow is accumulated.
The month with the least sunshine is January, with an average of 3.9h of sunshine.
The month with the lowest UV index is January, with an average maximum UV index of 1.
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.
The month with the most rainfall in Lafayette is May, when the rain falls for 18.3 days and typically aggregates up to 4.45" (113mm) of precipitation.
May through September are months without snowfall.
June has the longest days of the year, with an average of 15h and 6min of daylight.
The months with the most sunshine are June and July, with an average of 10h of sunshine.
June and July, with an average maximum UV index of 6, are months with the highest UV index.
July, known for its average high temperature of 81°F (27.2°C) and an average low temperature of 64.6°F (18.1°C), is the warmest month in Lafayette.
With an average relative humidity of 84%, July is the most humid month.
October is the least humid month, with an average relative humidity of 72%.
The month with the shortest days is December, with an average of 9h and 18min of daylight.
Average temperature
Lafayette, IL
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (28.8°F).
The month with the highest average low temperature is July (64.6°F).
The coldest month (with the lowest average low temperature) is January (16.7°F).
Average pressure
Lafayette, IL
- Average pressure in January:
30.13"Hg - Average pressure in February:
30.11"Hg - Average pressure in March:
30.08"Hg - Average pressure in April:
29.94"Hg - Average pressure in May:
29.95"Hg - Average pressure in June:
29.91"Hg
- Average pressure in July:
29.97"Hg - Average pressure in August:
29.97"Hg - Average pressure in September:
30.03"Hg - Average pressure in October:
30.01"Hg - Average pressure in November:
30.1"Hg - Average pressure in December:
30.11"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed
Lafayette, IL
- Average wind speed in January:
10.4mph - Average wind speed in February:
10.4mph - Average wind speed in March:
10.4mph - Average wind speed in April:
10.6mph - Average wind speed in May:
9.1mph - Average wind speed in June:
7.9mph
- Average wind speed in July:
6.7mph - Average wind speed in August:
6.6mph - Average wind speed in September:
7.8mph - Average wind speed in October:
9.4mph - Average wind speed in November:
10.3mph - Average wind speed in December:
9.9mph
The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest month (with the lowest average wind speed) is August (6.6mph).
Average humidity
Lafayette, IL
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (72%).
Average rainfall
Lafayette, IL
- Average rainfall in January:
1.42" - Average rainfall in February:
1.57" - Average rainfall in March:
2.05" - Average rainfall in April:
3.5" - Average rainfall in May:
4.45" - Average rainfall in June:
3.31"
- Average rainfall in July:
2.87" - Average rainfall in August:
2.01" - Average rainfall in September:
2.05" - Average rainfall in October:
2.72" - Average rainfall in November:
1.81" - Average rainfall in December:
1.42"
The wettest month (with the highest rainfall) is May (4.45").
The driest months (with the least rainfall) are January and December (1.42").
Average rainfall days
Lafayette, IL
- Average rainfall days in January:
6.1 days - Average rainfall days in February:
5.6 days - Average rainfall days in March:
12.7 days - Average rainfall days in April:
16.3 days - Average rainfall days in May:
18.3 days - Average rainfall days in June:
17.2 days
- Average rainfall days in July:
17.1 days - Average rainfall days in August:
13.8 days - Average rainfall days in September:
11.5 days - Average rainfall days in October:
12.3 days - Average rainfall days in November:
8.4 days - Average rainfall days in December:
7.9 days
The month with the highest number of rainy days is May (18.3 days).
The month with the least rainy days is February (5.6 days).
Average snowfall
Lafayette, IL
The month with the highest snowfall is January (3.66").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Lafayette, IL
- Average snowfall days in January:
11.4 days - Average snowfall days in February:
9.1 days - Average snowfall days in March:
4.5 days - Average snowfall days in April:
1.2 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:
0.5 days - Average snowfall days in November:
3 days - Average snowfall days in December:
7.3 days
The month with the highest number of snowfall days is January (11.4 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Lafayette, IL
- Average daylight in January:
9h and 36min - Average daylight in February:
10h and 42min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 18min - Average daylight in May:
14h and 30min - Average daylight in June:
15h and 6min
- Average daylight in July:
14h and 48min - Average daylight in August:
13h and 48min - Average daylight in September:
12h and 30min - Average daylight in October:
11h and 6min - Average daylight in November:
9h and 54min - Average daylight in December:
9h and 18min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in January:
3h and 54min - Average sunshine in February:
4h and 6min - Average sunshine in March:
6h and 36min - Average sunshine in April:
7h and 54min - Average sunshine in May:
8h and 48min - Average sunshine in June:
10h and 0min
- Average sunshine in July:
10h and 0min - Average sunshine in August:
9h and 48min - Average sunshine in September:
9h and 12min - Average sunshine in October:
5h and 36min - Average sunshine in November:
5h and 18min - Average sunshine in December:
4h and 12min
The months with the most sunshine are June and July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days
Lafayette, IL
- Average sunshine days in January:
15.2 days - Average sunshine days in February:
13.6 days - Average sunshine days in March:
14.1 days - Average sunshine days in April:
11.5 days - Average sunshine days in May:
11.3 days - Average sunshine days in June:
10.2 days
- Average sunshine days in July:
10.6 days - Average sunshine days in August:
14.4 days - Average sunshine days in September:
16.2 days - Average sunshine days in October:
16.5 days - Average sunshine days in November:
18 days - Average sunshine days in December:
17.5 days
The month with the most sunshine days is November (18 days).
The month with the least sunshine days is June (10.2 days).
Average UV index
Lafayette, IL
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover
Lafayette, IL
The month with the most cloud cover is January (Cloud cover 58).
The months with the least cloud cover are August and September (Cloud cover 30).
Average visibility
Lafayette, IL
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).
