Climate and monthly weather forecastMarseilles, IL
Climate and monthly weather forecast
Weather in January
January, like December, is a freezing cold winter month in Marseilles, Illinois, with an average temperature varying between 29.1°F (-1.6°C) and 17.2°F (-8.2°C). In Marseilles, the month of January is known for its lowest average temperatures, reaching a high of 29.1°F (-1.6°C) and a low of 17.2°F (-8.2°C). Weather in January »Weather in February
February, the last month of the winter in Marseilles, is a wintry month, with an average temperature fluctuating between 20.7°F (-6.3°C) and 33.4°F (0.8°C). The average high-temperature during February is a cold 33.4°F (0.8°C), almost matching the conditions of the preceding month. Weather in February »Weather in March
The first month of the spring, March, is a frosty month in Marseilles, Illinois, with an average temperature fluctuating between 32.5°F (0.3°C) and 46.9°F (8.3°C). In Marseilles, the average high-temperature in March increases from an icy 33.4°F (0.8°C) in February to a frosty 46.9°F (8.3°C). Weather in March »Weather in April
April is a refreshing spring month in Marseilles, Illinois, with an average temperature fluctuating between 42.4°F (5.8°C) and 58.8°F (14.9°C). The start of April signals an increase in the average high-temperature, moving from a chilly 46.9°F (8.3°C) in March to a mild 58.8°F (14.9°C). Weather in April »Weather in May
May, the last month of the spring in Marseilles, is a pleasant month, with an average temperature fluctuating between 70.7°F (21.5°C) and 53.8°F (12.1°C). May sees a temperature increase, moving from a refreshing 58.8°F (14.9°C) in April to an agreeable 70.7°F (21.5°C). Weather in May »Weather in June
The first month of the summer, June, is a warm month in Marseilles, Illinois, with an average temperature fluctuating between 78.8°F (26°C) and 61.5°F (16.4°C). June's arrival signals a subtle increase in average high-temperatures, moving from May's agreeable 70.7°F (21.5°C) to a warm 78.8°F (26°C). Weather in June »Weather in July
July, like June, in Marseilles, Illinois, is a moderately hot summer month, with an average temperature fluctuating between 81°F (27.2°C) and 64.2°F (17.9°C). In Marseilles, Illinois, the month of July is known for its highest average temperatures, reaching a high of 81°F (27.2°C) and a low of 64.2°F (17.9°C). For most parts of July, the heat index is estimated at 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 Marseilles, Illinois, with an average temperature ranging between min 62.1°F (16.7°C) and max 79.5°F (26.4°C). Shifting into August, Marseilles records an average high-temperature of a still moderately hot 79.5°F (26.4°C), presenting minor fluctuations compared to the previous month. Weather in August »Weather in September
September, the first month of the autumn in Marseilles, is also a moderately hot month, with temperature in the range of an average high of 74.7°F (23.7°C) and an average low of 56.3°F (13.5°C). The onset of September brings with it an average high-temperature of a still moderately hot 74.7°F (23.7°C), showing a negligible variation from the month before. Weather in September »Weather in October
October, the same as September, is another enjoyable autumn month in Marseilles, Illinois, with temperature in the range of an average low of 45.9°F (7.7°C) and an average high of 61.7°F (16.5°C). With October's onset, the average high-temperature recedes from September's moderately hot 74.7°F (23.7°C) to a refreshing 61.7°F (16.5°C). Weather in October »Weather in November
November, the last month of the autumn in Marseilles, is also a frosty month, with an average temperature ranging between max 47.1°F (8.4°C) and min 33.8°F (1°C). A notable decrease in the average high-temperature is observed during November, falling from a refreshing 61.7°F (16.5°C) in October to a frosty 47.1°F (8.4°C). Weather in November »Weather in December
December, the first month of the winter in Marseilles, is also a wintry month, with temperature in the range of an average low of 25.2°F (-3.8°C) and an average high of 35.1°F (1.7°C). The shift from November to December corresponds with a decrease in the average high-temperature, down to a cold 35.1°F (1.7°C) from a frosty 47.1°F (8.4°C). Weather in December »Updated: Jul 30, 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
Marseilles witnesses the coldest weather in January, with temperatures averaging a high of 29.1°F (-1.6°C) and a low of 17.2°F (-8.2°C).
Throughout the year, there are 154.1 rainfall days, and 31.73" (806mm) of precipitation is accumulated.
January through April, October through December are months with snowfall.
Throughout the year, there are 39.8 snowfall days, and 15.71" (399mm) of snow is accumulated.
With an average of 3.9h of sunshine, January has the least sunshine of the year in Marseilles.
The month with the lowest UV index is January, with an average maximum UV index of 1.
The month with the most snowfall is February, when snow falls for 9.7 days and typically aggregates up to 4.57" (116mm) of snow.
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 is May, when the rain falls for 18.3 days and typically aggregates up to 4.49" (114mm) of precipitation.
May through September are months without snowfall.
With an average of 15h and 6min of daylight, June has the longest days of the year.
June and August, with an average of 9.8h of sunshine, are months with the most sunshine.
The months with the highest UV index in Marseilles are June and July, with an average maximum UV index of 6.
In Marseilles, July is the warmest month, with temperatures averaging a high of 81°F (27.2°C) and a low of 64.2°F (17.9°C).
The most humid month in Marseilles is July, with an average relative humidity of 85%.
The least humid month is October, with an average relative humidity of 72%.
December is the month with the least rainfall. Rain falls for 7.6 days and accumulates 1.65" (42mm) of precipitation.
The month with the shortest days is December, with an average of 9h and 18min of daylight.
Average temperature
Marseilles, IL
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (29.1°F).
The month with the highest average low temperature is July (64.2°F).
The coldest month (with the lowest average low temperature) is January (17.2°F).
Average pressure
Marseilles, IL
- Average pressure in January:
30.12"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:
29.96"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:
30.03"Hg - Average pressure in October:
30.01"Hg - Average pressure in November:
30.1"Hg - Average pressure in December:
30.1"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed
Marseilles, IL
- Average wind speed in January:
10.1mph - Average wind speed in February:
10mph - Average wind speed in March:
9.8mph - Average wind speed in April:
10.1mph - Average wind speed in May:
8.6mph - Average wind speed in June:
7.5mph
- Average wind speed in July:
6.3mph - Average wind speed in August:
6.1mph - Average wind speed in September:
7.3mph - Average wind speed in October:
9mph - Average wind speed in November:
9.7mph - Average wind speed in December:
9.5mph
The windiest months (with the highest average wind speed) are January and April (10.1mph).
The calmest month (with the lowest average wind speed) is August (6.1mph).
Average humidity
Marseilles, IL
The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is October (72%).
Average rainfall
Marseilles, IL
- Average rainfall in January:
1.81" - Average rainfall in February:
1.69" - Average rainfall in March:
2.13" - Average rainfall in April:
3.86" - Average rainfall in May:
4.49" - Average rainfall in June:
3.62"
- Average rainfall in July:
3.27" - Average rainfall in August:
2.28" - Average rainfall in September:
2.32" - Average rainfall in October:
2.87" - Average rainfall in November:
1.73" - Average rainfall in December:
1.65"
The wettest month (with the highest rainfall) is May (4.49").
The driest month (with the least rainfall) is December (1.65").
Average rainfall days
Marseilles, IL
- Average rainfall days in January:
6.3 days - Average rainfall days in February:
5.8 days - Average rainfall days in March:
13.2 days - Average rainfall days in April:
17.7 days - Average rainfall days in May:
18.3 days - Average rainfall days in June:
17.3 days
- Average rainfall days in July:
17.6 days - Average rainfall days in August:
15 days - Average rainfall days in September:
12.3 days - Average rainfall days in October:
12.8 days - Average rainfall days in November:
10.2 days - Average rainfall days in December:
7.6 days
The month with the highest number of rainy days is May (18.3 days).
The month with the least rainy days is February (5.8 days).
Average snowfall
Marseilles, IL
The month with the highest snowfall is February (4.57").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Marseilles, IL
- Average snowfall days in January:
11.9 days - Average snowfall days in February:
9.7 days - Average snowfall days in March:
5.4 days - Average snowfall days in April:
1.4 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:
0.4 days - Average snowfall days in November:
2.8 days - Average snowfall days in December:
8.2 days
The month with the highest number of snowfall days is January (11.9 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Marseilles, IL
- Average daylight in January:
9h and 36min - Average daylight in February:
10h and 36min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 24min - 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 0min - Average sunshine in March:
6h and 18min - Average sunshine in April:
7h and 48min - Average sunshine in May:
8h and 54min - Average sunshine in June:
9h and 48min
- Average sunshine in July:
9h and 42min - Average sunshine in August:
9h and 48min - Average sunshine in September:
8h and 54min - Average sunshine in October:
5h and 54min - Average sunshine in November:
5h and 6min - Average sunshine in December:
4h and 18min
The months with the most sunshine are June and August (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days
Marseilles, IL
- Average sunshine days in January:
14 days - Average sunshine days in February:
12.9 days - Average sunshine days in March:
13.2 days - Average sunshine days in April:
10.6 days - Average sunshine days in May:
10.7 days - Average sunshine days in June:
10.1 days
- Average sunshine days in July:
10.8 days - Average sunshine days in August:
13.3 days - Average sunshine days in September:
15.1 days - Average sunshine days in October:
16 days - Average sunshine days in November:
17.1 days - Average sunshine days in December:
16.5 days
The month with the most sunshine days is November (17.1 days).
The month with the least sunshine days is June (10.1 days).
Average UV index
Marseilles, 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
Marseilles, IL
The month with the most cloud cover is January (Cloud cover 59).
The month with the least cloud cover is September (Cloud cover 32).
Average visibility
Marseilles, IL
The months with the highest visibility are February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, July and August (5mi).
