Climate and monthly weather forecastMaryville, IL
Climate and monthly weather forecast
Weather in January
January, like December, in Maryville, Illinois, is an icy winter month, with temperature in the range of an average low of 24.3°F (-4.3°C) and an average high of 37.4°F (3°C). January, with its high-temperature average of 37.4°F (3°C) and a low-temperature average of 24.3°F (-4.3°C), is the coldest month. Weather in January »Weather in February
February, the last month of the winter in Maryville, is also an icy month, with temperature in the range of an average low of 27.5°F (-2.5°C) and an average high of 42.1°F (5.6°C). The beginning of February records an average high-temperature of a still wintry 42.1°F (5.6°C), almost echoing the conditions of the previous month. Weather in February »Weather in March
March, the first month of the spring in Maryville, is a cool month, with an average temperature fluctuating between 54.1°F (12.3°C) and 37.8°F (3.2°C). The start of March is characterized by an increase in the average high-temperature, transitioning from a wintry 42.1°F (5.6°C) in February to a fresh 54.1°F (12.3°C). Weather in March »Weather in April
April in Maryville, Illinois, is an enjoyable spring month, with an average temperature fluctuating between 64.9°F (18.3°C) and 47.8°F (8.8°C). April shows a rise in the average high-temperature, moving from March's cool 54.1°F (12.3°C) to a comfortable 64.9°F (18.3°C). Weather in April »Weather in May
May, the last month of the spring in Maryville, is a warm month, with temperature in the range of an average low of 57.6°F (14.2°C) and an average high of 74.5°F (23.6°C). The shift into May is characterized by a rise in the average high-temperature, transitioning from April's comfortable 64.9°F (18.3°C) to a moderately hot 74.5°F (23.6°C). Weather in May »Weather in June
June, the first month of the summer in Maryville, is still a warm month, with an average temperature fluctuating between 83.3°F (28.5°C) and 66.6°F (19.2°C). Maryville observes a slight ascent in average high-temperatures during June, adjusting from a warm 74.5°F (23.6°C) in May to a still moderately hot 83.3°F (28.5°C). Weather in June »Weather in July
July, the same as June, is another warm summer month in Maryville, Illinois, with an average temperature varying between 85.6°F (29.8°C) and 68.2°F (20.1°C). July, with average temperatures reaching a high of 85.6°F (29.8°C) and a low of 68.2°F (20.1°C), is the warmest month. The heat index value for July is evaluated at a torrid 98.6°F (37°C). Weather in July »Weather in August
August, the last month of the summer in Maryville, is another warm month, with an average temperature fluctuating between 84°F (28.9°C) and 66°F (18.9°C). August's arrival brings an average high-temperature of a still warm 84°F (28.9°C), demonstrating subtle variation from the preceding month. Weather in August »Weather in September
September, the first month of the autumn in Maryville, is still a warm month, with an average temperature ranging between min 59.9°F (15.5°C) and max 79°F (26.1°C). Maryville measures an average high-temperature of a still moderately hot 79°F (26.1°C) in September, nearly consistent with the preceding month. Weather in September »Weather in October
October, like September, in Maryville, Illinois, is another comfortable autumn month, with an average temperature varying between 48.9°F (9.4°C) and 66°F (18.9°C). A subtle decrease in the average high-temperature marks October, falling from September's warm 79°F (26.1°C) to a comfortable 66°F (18.9°C). Weather in October »Weather in November
The last month of the autumn, November, is also a fresh month in Maryville, Illinois, with an average temperature ranging between max 52.9°F (11.6°C) and min 37.6°F (3.1°C). In November, the meteorological conditions alter, with the average high-temperature shifting from an enjoyable 66°F (18.9°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 Maryville, is also a wintry month, with an average temperature varying between 41.9°F (5.5°C) and 30°F (-1.1°C). December comes with a decrease in the average high-temperature, falling from a cool 52.9°F (11.6°C) in November to a cold 41.9°F (5.5°C). Weather in December »Updated: Feb 12, 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
The coldest period in Maryville, Illinois, tends to be January, when average temperatures fluctuate between a high of 37.4°F (3°C) and a low of 24.3°F (-4.3°C).
Throughout the year, in Maryville, there are 149.9 rainfall days, and 33.94" (862mm) of precipitation is accumulated.
January through March, September, November and December are months with snowfall.
January is the month with the most snowfall. Snow falls for 7 days and accumulates 2.13" (54mm) of snow.
Throughout the year, there are 20.7 snowfall days, and 7.13" (181mm) of snow is accumulated.
With an average of 4.5h of sunshine, January has the least sunshine of the year in Maryville.
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Maryville.
The month with the least rainfall is February, when the rain falls for 8.3 days and typically collects 1.77" (45mm) of precipitation.
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.
April through August and October are months without snowfall in Maryville, Illinois.
May, July and August, with an average relative humidity of 79%, are most humid months.
The month with the most rainfall is May, when the rain falls for 17.1 days and typically aggregates up to 4.17" (106mm) of precipitation.
The months with the highest UV index in Maryville are May through August, with an average maximum UV index of 6.
With an average of 14h and 48min of daylight, June has the longest days of the year in Maryville, Illinois.
The month with the most sunshine in Maryville, Illinois, is June, with an average of 10.5h of sunshine.
Maryville's temperatures tend to reach their peak averages in July, with a high of 85.6°F (29.8°C) and a low of 68.2°F (20.1°C).
With an average relative humidity of 71%, October is the least humid month in Maryville.
The month with the shortest days in Maryville is December, with an average of 9h and 30min of daylight.
Average temperature
Maryville, IL
The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (37.4°F).
The month with the highest average low temperature is July (68.2°F).
The coldest month (with the lowest average low temperature) is January (24.3°F).
Average pressure
Maryville, IL
- Average pressure in January:
30.16"Hg - Average pressure in February:
30.12"Hg - Average pressure in March:
30.07"Hg - Average pressure in April:
29.94"Hg - Average pressure in May:
29.96"Hg - Average pressure in June:
29.92"Hg
- Average pressure in July:
29.97"Hg - Average pressure in August:
29.98"Hg - Average pressure in September:
30.02"Hg - Average pressure in October:
30.03"Hg - Average pressure in November:
30.12"Hg - Average pressure in December:
30.13"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed
Maryville, IL
- Average wind speed in January:
9.5mph - Average wind speed in February:
9.4mph - Average wind speed in March:
9.3mph - Average wind speed in April:
9.1mph - Average wind speed in May:
7.5mph - Average wind speed in June:
6.6mph
- Average wind speed in July:
5.6mph - Average wind speed in August:
5.7mph - Average wind speed in September:
6.2mph - Average wind speed in October:
8mph - Average wind speed in November:
8.7mph - Average wind speed in December:
8.8mph
The windiest month (with the highest average wind speed) is January (9.5mph).
The calmest month (with the lowest average wind speed) is July (5.6mph).
Average humidity
Maryville, IL
The months with the highest relative humidity are May, July and August (79%).
The month with the lowest relative humidity is October (71%).
Average rainfall
Maryville, IL
- Average rainfall in January:
2.2" - Average rainfall in February:
1.77" - Average rainfall in March:
2.6" - Average rainfall in April:
3.5" - Average rainfall in May:
4.17" - Average rainfall in June:
3.9"
- Average rainfall in July:
3.31" - Average rainfall in August:
3.35" - Average rainfall in September:
2.13" - Average rainfall in October:
2.76" - Average rainfall in November:
2.05" - Average rainfall in December:
2.2"
The wettest month (with the highest rainfall) is May (4.17").
The driest month (with the least rainfall) is February (1.77").
Average rainfall days
Maryville, IL
- Average rainfall days in January:
7.8 days - Average rainfall days in February:
8.3 days - Average rainfall days in March:
13.9 days - Average rainfall days in April:
15.4 days - Average rainfall days in May:
17.1 days - Average rainfall days in June:
15.5 days
- Average rainfall days in July:
16.4 days - Average rainfall days in August:
13.1 days - Average rainfall days in September:
12.3 days - Average rainfall days in October:
11.1 days - Average rainfall days in November:
10.6 days - Average rainfall days in December:
8.4 days
The month with the highest number of rainy days is May (17.1 days).
The month with the least rainy days is January (7.8 days).
Average snowfall
Maryville, IL
The month with the highest snowfall is January (2.13").
The months with the least snowfall are April, May, June, July, August and October (0").
Average snowfall days
Maryville, IL
- Average snowfall days in January:
7 days - Average snowfall days in February:
6 days - Average snowfall days in March:
2.2 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:
0.1 days - Average snowfall days in October:
0.1 days - Average snowfall days in November:
1.2 days - Average snowfall days in December:
3.8 days
The month with the highest number of snowfall days is January (7 days).
The months with the least snowfall days are May, June, July and August (0 days).
Average daylight / Average sunshine
Maryville, IL
- Average daylight in January:
9h and 48min - Average daylight in February:
10h and 48min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 12min - Average daylight in May:
14h and 18min - Average daylight in June:
14h and 48min
- Average daylight in July:
14h and 36min - Average daylight in August:
13h and 36min - Average daylight in September:
12h and 24min - Average daylight in October:
11h and 12min - Average daylight in November:
10h and 6min - Average daylight in December:
9h and 30min
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 30min - Average sunshine in February:
4h and 36min - Average sunshine in March:
6h and 30min - Average sunshine in April:
8h and 30min - Average sunshine in May:
9h and 24min - Average sunshine in June:
10h and 30min
- Average sunshine in July:
10h and 18min - Average sunshine in August:
10h and 6min - Average sunshine in September:
9h and 18min - Average sunshine in October:
6h and 12min - Average sunshine in November:
5h and 36min - Average sunshine in December:
4h and 48min
The month with the most sunshine is June (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 30min).
Average sunshine days
Maryville, IL
- Average sunshine days in January:
17 days - Average sunshine days in February:
14.5 days - Average sunshine days in March:
14.3 days - Average sunshine days in April:
13.1 days - Average sunshine days in May:
11.6 days - Average sunshine days in June:
11.8 days
- Average sunshine days in July:
12.7 days - Average sunshine days in August:
15.3 days - Average sunshine days in September:
15.1 days - Average sunshine days in October:
18.2 days - Average sunshine days in November:
17.9 days - Average sunshine days in December:
18.6 days
The month with the most sunshine days is December (18.6 days).
The month with the least sunshine days is May (11.6 days).
Average UV index
Maryville, 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
Maryville, IL
The month with the most cloud cover is January (Cloud cover 51).
The months with the least cloud cover are June and August (Cloud cover 28).
Average visibility
Maryville, 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).
