Expand
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, is a freezing cold winter month in Lewistown, Illinois, with an average temperature ranging between max 31.5°F (-0.3°C) and min 19.4°F (-7°C). January, on average, is the coldest month, registering a high temperature of 31.5°F (-0.3°C) and a low of 19.4°F (-7°C). Weather in January »
Weather in February
The last month of the winter, February, is a cold month in Lewistown, Illinois, with an average temperature fluctuating between 36.3°F (2.4°C) and 23°F (-5°C). February's onset records a minor alteration in the average high-temperature to an icy 36.3°F (2.4°C) from January's 31.5°F (-0.3°C). Weather in February »
Weather in March
The first month of the spring, March, is a chilly month in Lewistown, Illinois, with temperature in the range of an average low of 34.3°F (1.3°C) and an average high of 49.6°F (9.8°C). Entering March, Lewistown sees a temperature rise, with the average high-temperature advancing from February's icy 36.3°F (2.4°C) to a frosty 49.6°F (9.8°C). Weather in March »
Weather in April
April in Lewistown, Illinois, is an enjoyable spring month, with an average temperature ranging between max 61.3°F (16.3°C) and min 44.2°F (6.8°C). As April begins, there is an increase in the average high-temperature, moving from a chilly 49.6°F (9.8°C) in March to an enjoyable 61.3°F (16.3°C). Weather in April »
Weather in May
The last month of the spring, May, is a pleasant month in Lewistown, Illinois, with temperature in the range of an average high of 72°F (22.2°C) and an average low of 55°F (12.8°C). May's arrival brings a change in high-temperatures, moving from a refreshing 61.3°F (16.3°C) in April to a pleasant 72°F (22.2°C). Weather in May »
Weather in June
June, the first month of the summer in Lewistown, is a moderately hot month, with temperature in the range of an average low of 63.7°F (17.6°C) and an average high of 80.8°F (27.1°C). Lewistown in June experiences a slight uptick in the average high-temperature, adjusting from May's pleasant 72°F (22.2°C) to a warm 80.8°F (27.1°C). Weather in June »
Weather in July
July, the same as June, is a moderately hot summer month in Lewistown, Illinois, with temperature in the range of an average low of 65.8°F (18.8°C) and an average high of 82.8°F (28.2°C). July is the warmest month, exhibiting average temperatures of 82.8°F (28.2°C) at the peak and 65.8°F (18.8°C) at the base. The heat index value during July is estimated at a hot 91.4°F (33°C). Weather in July »
Weather in August
August, the last month of the summer in Lewistown, is also a moderately hot month, with an average temperature fluctuating between 82°F (27.8°C) and 63.7°F (17.6°C). Lewistown records an average high-temperature of a still warm 82°F (27.8°C) in August, maintaining a close correlation with July's 82.8°F (28.2°C). Weather in August »
Weather in September
September, the first month of the autumn in Lewistown, is also a moderately hot month, with temperature in the range of an average high of 76.6°F (24.8°C) and an average low of 57.6°F (14.2°C). The beginning of September brings a slight decrease in the average high-temperature, transitioning from a warm 82°F (27.8°C) in August to a still moderately hot 76.6°F (24.8°C). Weather in September »
Weather in October
October, the same as September, is another comfortable autumn month in Lewistown, Illinois, with an average temperature ranging between max 63°F (17.2°C) and min 46.6°F (8.1°C). Lewistown in October undergoes a mild reduction in the average high-temperature, shifting from September's moderately hot 76.6°F (24.8°C) to a comfortable 63°F (17.2°C). Weather in October »
Weather in November
The last month of the autumn, November, is another chilly month in Lewistown, Illinois, with an average temperature varying between 49.1°F (9.5°C) and 35.1°F (1.7°C). November's arrival corresponds with a decrease in average high-temperatures, from October's comfortable 63°F (17.2°C) to a frosty 49.1°F (9.5°C). Weather in November »
Weather in December
December, the first month of the winter in Lewistown, is also an icy month, with an average temperature varying between 26.4°F (-3.1°C) and 37°F (2.8°C). Lewistown's transition into December involves a shift in temperature, receding from a frosty 49.1°F (9.5°C) in November to a wintry 37°F (2.8°C). Weather in December »
Updated: Jun 14, 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 time of the year is the coldest?
Lewistown's January weather, with an average high temperature of 31.5°F (-0.3°C) and an average low temperature of 19.4°F (-7°C), tends to be the coldest of the year.
How much does it rain?
In Lewistown, during the entire year, the rain falls for 131.7 days and collects up to 22.48" (571mm) of precipitation.
When does it snow in Lewistown?
Months with snowfall are January through April, October through December.
What is the snowiest month in Lewistown?
January is the month with the most snowfall. Snow falls for 9.4 days and accumulates 3.35" (85mm) of snow.
How much does it snow?
In Lewistown, during the entire year, snow falls for 27.4 days and aggregates up to 9.21" (234mm) of snow.
What is the month with the least sunshine?
With an average of 4.1h of sunshine, January has the least sunshine of the year.
What is the month 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 in Lewistown.
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?
May is the month with the most rainfall. Rain falls for 16.7 days and accumulates 3.23" (82mm) of precipitation.
When it does not snow?
In Lewistown, snow does not fall in May through September.
When are the longest days?
June has the longest days of the year in Lewistown, with an average of 15h and 0min of daylight.
What is the month with the most sunshine?
The months with the most sunshine are June and July, with an average of 10.1h of sunshine.
When is the highest UV index?
June through August, with an average maximum UV index of 6, are months with the highest UV index.
What are the warmest months?
July, known for its average high temperature of 82.8°F (28.2°C) and an average low temperature of 65.8°F (18.8°C), is the warmest month.
What is the most humid month?
With an average relative humidity of 83%, July is the most humid month.
What is the least humid month in Lewistown?
The least humid month is October, with an average relative humidity of 71%.
What is the driest month?
December is the month with the least rainfall. Rain falls for 6.5 days and accumulates 0.94" (24mm) of precipitation.
What is the month with the shortest days?
The month with the shortest days is December, with an average of 9h and 18min of daylight.
Average temperature
Lewistown, IL
The warmest month (with the highest average high temperature) is July (82.8°F).
The month with the lowest average high temperature is January (31.5°F).
The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is January (19.4°F).
Average pressure
Lewistown, IL
- Average pressure in January:
30.14"Hg - Average pressure in February:
30.12"Hg - Average pressure in March:
30.08"Hg - Average pressure in April:
29.93"Hg - Average pressure in May:
29.95"Hg - Average pressure in June:
29.91"Hg
- Average pressure in July:
29.96"Hg - Average pressure in August:
29.97"Hg - Average pressure in September:
30.02"Hg - Average pressure in October:
30.02"Hg - Average pressure in November:
30.11"Hg - Average pressure in December:
30.11"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
Lewistown, IL
- Average wind speed in January:
10.3mph - Average wind speed in February:
10.3mph - Average wind speed in March:
10.3mph - Average wind speed in April:
10.4mph - Average wind speed in May:
8.7mph - Average wind speed in June:
7.6mph
- Average wind speed in July:
6.5mph - Average wind speed in August:
6.5mph - Average wind speed in September:
7.5mph - Average wind speed in October:
9.2mph - Average wind speed in November:
9.9mph - Average wind speed in December:
9.8mph
The windiest month (with the highest average wind speed) is April (10.4mph).
The calmest months (with the lowest average wind speed) are July and August (6.5mph).
Average humidity
Lewistown, IL
The month with the highest relative humidity is July (83%).
The month with the lowest relative humidity is October (71%).
Average rainfall
Lewistown, IL
- Average rainfall in January:
1.02" - Average rainfall in February:
1.1" - Average rainfall in March:
1.65" - Average rainfall in April:
2.6" - Average rainfall in May:
3.23" - Average rainfall in June:
2.68"
- Average rainfall in July:
2.17" - Average rainfall in August:
1.89" - Average rainfall in September:
2.09" - Average rainfall in October:
1.89" - Average rainfall in November:
1.22" - Average rainfall in December:
0.94"
The wettest month (with the highest rainfall) is May (3.23").
The driest month (with the least rainfall) is December (0.94").
Average rainfall days
Lewistown, IL
- Average rainfall days in January:
4.8 days - Average rainfall days in February:
4.7 days - Average rainfall days in March:
11.9 days - Average rainfall days in April:
13.7 days - Average rainfall days in May:
16.7 days - Average rainfall days in June:
15.8 days
- Average rainfall days in July:
15.8 days - Average rainfall days in August:
13.2 days - Average rainfall days in September:
11 days - Average rainfall days in October:
10.5 days - Average rainfall days in November:
7.1 days - Average rainfall days in December:
6.5 days
The month with the highest number of rainy days is May (16.7 days).
The month with the least rainy days is February (4.7 days).
Average snowfall
Lewistown, IL
The month with the highest snowfall is January (3.35").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Lewistown, IL
- Average snowfall days in January:
9.4 days - Average snowfall days in February:
6.8 days - Average snowfall days in March:
3.3 days - Average snowfall days in April:
1 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:
0.1 days - Average snowfall days in November:
1.8 days - Average snowfall days in December:
5 days
The month with the highest number of snowfall days is January (9.4 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Lewistown, IL
- Average daylight in January:
9h and 4min - Average daylight in February:
10h and 4min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 2min - Average daylight in May:
14h and 2min - Average daylight in June:
15h and 0min
- Average daylight in July:
14h and 4min - 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:
9h and 5min - Average daylight in December:
9h 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 January:
4h and 1min - Average sunshine in February:
4h and 2min - Average sunshine in March:
6h and 3min - Average sunshine in April:
8h and 1min - Average sunshine in May:
9h and 0min - Average sunshine in June:
10h and 1min
- Average sunshine in July:
10h and 1min - Average sunshine in August:
9h and 5min - Average sunshine in September:
9h and 2min - Average sunshine in October:
5h and 4min - Average sunshine in November:
5h and 2min - Average sunshine in December:
4h and 3min
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
Lewistown, IL
- Average sunshine days in January:
17.9 days - Average sunshine days in February:
17 days - Average sunshine days in March:
16.3 days - Average sunshine days in April:
14.6 days - Average sunshine days in May:
12.5 days - Average sunshine days in June:
11.1 days
- Average sunshine days in July:
11.7 days - Average sunshine days in August:
14.6 days - Average sunshine days in September:
17.1 days - Average sunshine days in October:
17.9 days - Average sunshine days in November:
20 days - Average sunshine days in December:
20.4 days
The month with the most sunshine days is December (20.4 days).
The month with the least sunshine days is June (11.1 days).
Average UV index
Lewistown, IL
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
Lewistown, IL
The month with the most cloud cover is January (Cloud cover 56).
The month with the least cloud cover is September (Cloud cover 29).
Average visibility
Lewistown, 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).
Lewistown, Illinois, USA
Weather forecast for your location
1. Click Locate me button
2. Allow the app to use your location
2. Allow the app to use your location