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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, the same as December, in Hamilton, Illinois, is a freezing cold winter month, with an average temperature ranging between min 19.2°F (-7.1°C) and max 31.3°F (-0.4°C). The coldest period tends to be January, when average temperatures fluctuate between a high of 31.3°F (-0.4°C) and a low of 19.2°F (-7.1°C). Weather in January »
Weather in February
February, the last month of the winter in Hamilton, is an icy month, with temperature in the range of an average high of 36.3°F (2.4°C) and an average low of 22.8°F (-5.1°C). As February unfolds, the average high-temperature reaches a wintry 36.3°F (2.4°C), hinting at a slight fluctuation from the previous month. Weather in February »
Weather in March
March, the first month of the spring in Hamilton, is a chilly month, with an average temperature fluctuating between 49.8°F (9.9°C) and 34.7°F (1.5°C). March's arrival sees a rise in the average high-temperature, jumping from February's icy 36.3°F (2.4°C) to a frosty 49.8°F (9.9°C). Weather in March »
Weather in April
April in Hamilton, Illinois, is a comfortable spring month, with an average temperature varying between 61.9°F (16.6°C) and 44.2°F (6.8°C). In Hamilton, the average high-temperature in April increases from a frosty 49.8°F (9.9°C) in March to a refreshing 61.9°F (16.6°C). Weather in April »
Weather in May
May, the last month of the spring in Hamilton, is a pleasant month, with temperature in the range of an average high of 71.6°F (22°C) and an average low of 54.9°F (12.7°C). The arrival of May brings an increase in high-temperatures, moving from a refreshing 61.9°F (16.6°C) in April to an agreeable 71.6°F (22°C). Weather in May »
Weather in June
June, the first month of the summer in Hamilton, is a warm month, with an average temperature fluctuating between 63.7°F (17.6°C) and 80.8°F (27.1°C). The shift into June is accompanied by a temperature increase, with the average high-temperature rising from a pleasant 71.6°F (22°C) in May to a moderately hot 80.8°F (27.1°C). Weather in June »
Weather in July
July, the same as June, is another warm summer month in Hamilton, Illinois, with an average temperature fluctuating between 83.3°F (28.5°C) and 66.4°F (19.1°C). In Hamilton, the month of July is known for its highest average temperatures, reaching a high of 83.3°F (28.5°C) and a low of 66.4°F (19.1°C). The heat index value during July is estimated at a tropical 93.2°F (34°C). Weather in July »
Weather in August
The last month of the summer, August, is another warm month in Hamilton, Illinois, with an average temperature varying between 82.8°F (28.2°C) and 64°F (17.8°C). The beginning of August records an average high-temperature of a still warm 82.8°F (28.2°C), almost echoing the conditions of the previous month. Weather in August »
Weather in September
The first month of the autumn, September, is still a warm month in Hamilton, Illinois, with an average temperature ranging between min 57.7°F (14.3°C) and max 77.5°F (25.3°C). September records an average high-temperature of a still warm 77.5°F (25.3°C), indicating a minor variation from the preceding month. Weather in September »
Weather in October
October, the same as September, is another refreshing autumn month in Hamilton, Illinois, with an average temperature ranging between min 46°F (7.8°C) and max 63.3°F (17.4°C). The decrease of average high-temperatures is mild in October, with a decline from a warm 77.5°F (25.3°C) in September to a comfortable 63.3°F (17.4°C). Weather in October »
Weather in November
November, the last month of the autumn in Hamilton, is another chilly month, with an average temperature fluctuating between 35.1°F (1.7°C) and 49.3°F (9.6°C). November ushers in a slight temperature change, with average high-temperatures reducing from October's comfortable 63.3°F (17.4°C) to a chilly 49.3°F (9.6°C). Weather in November »
Weather in December
December, the first month of the winter in Hamilton, is also an icy month, with temperature in the range of an average low of 25.9°F (-3.4°C) and an average high of 37.6°F (3.1°C). A shift in the average high-temperature occurs in December, reducing from a frosty 49.3°F (9.6°C) in November to a wintry 37.6°F (3.1°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
What is the coldest month in Hamilton?
January stands out as Hamilton's coldest month, with temperatures ranging between an average high of 31.3°F (-0.4°C) and a low of 19.2°F (-7.1°C).
What is the driest month in Hamilton?
January is the month with the least rainfall in Hamilton, Illinois. Rain falls for 4.9 days and accumulates 0.83" (21mm) of precipitation.
How much does it rain in Hamilton?
In Hamilton, during the entire year, the rain falls for 129.9 days and collects up to 20.71" (526mm) of precipitation.
When does it snow in Hamilton?
January through April, October through December are months with snowfall.
What is the snowiest month in Hamilton?
January is the month with the most snowfall in Hamilton, Illinois. Snow falls for 7.9 days and accumulates 2.91" (74mm) of snow.
How much does it snow in Hamilton?
In Hamilton, during the entire year, snow falls for 25.2 days and aggregates up to 8.03" (204mm) of snow.
What is the month with the least sunshine in Hamilton?
With an average of 4.3h of sunshine, January has the least sunshine of the year.
When is the lowest UV index in Hamilton?
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) in Hamilton?
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 rainiest month in Hamilton?
May is the month with the most rainfall. Rain falls for 16.8 days and accumulates 2.91" (74mm) of precipitation.
When it does not snow in Hamilton?
In Hamilton, snow does not fall in May through September.
When are the longest days in Hamilton?
With an average of 15h and 0min of daylight, June has the longest days of the year.
When is the highest UV index in Hamilton?
June through August, with an average maximum UV index of 6, are months with the highest UV index in Hamilton, Illinois.
What are the warmest months in Hamilton?
July, on average, is the warmest month, registering a high temperature of 83.3°F (28.5°C) and a low of 66.4°F (19.1°C).
What is the most humid month in Hamilton?
The most humid month is July, with an average relative humidity of 82%.
What month has the most sunshine in Hamilton?
July has the most sunshine of the year in Hamilton, with an average of 10.3h of sunshine.
What is the least humid month in Hamilton?
October is the least humid month in Hamilton, with an average relative humidity of 70%.
What is the month with the shortest days in Hamilton?
December has the shortest days of the year, with an average of 9h and 18min of daylight.
Average temperature
Hamilton, IL
The warmest month (with the highest average high temperature) is July (83.3°F).
The month with the lowest average high temperature is January (31.3°F).
The month with the highest average low temperature is July (66.4°F).
The coldest month (with the lowest average low temperature) is January (19.2°F).
Average pressure
Hamilton, IL
- Average pressure in January:
30.15"Hg - Average pressure in February:
30.12"Hg - Average pressure in March:
30.07"Hg - Average pressure in April:
29.93"Hg - Average pressure in May:
29.94"Hg - Average pressure in June:
29.9"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:
30.1"Hg - Average pressure in December:
30.12"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed
Hamilton, IL
- Average wind speed in January:
10.4mph - Average wind speed in February:
10.4mph - Average wind speed in March:
10.3mph - Average wind speed in April:
10.3mph - Average wind speed in May:
8.6mph - Average wind speed in June:
7.6mph
- Average wind speed in July:
6.6mph - Average wind speed in August:
6.6mph - Average wind speed in September:
7.5mph - Average wind speed in October:
9.3mph - Average wind speed in November:
10.1mph - Average wind speed in December:
9.9mph
The windiest months (with the highest average wind speed) are January and February (10.4mph).
The calmest months (with the lowest average wind speed) are July and August (6.6mph).
Average humidity
Hamilton, IL
The month with the highest relative humidity is July (82%).
The month with the lowest relative humidity is October (70%).
Average rainfall
Hamilton, IL
- Average rainfall in January:
0.83" - Average rainfall in February:
1.06" - Average rainfall in March:
1.69" - Average rainfall in April:
2.44" - Average rainfall in May:
2.91" - Average rainfall in June:
2.4"
- Average rainfall in July:
2.09" - Average rainfall in August:
1.77" - Average rainfall in September:
1.65" - Average rainfall in October:
1.42" - Average rainfall in November:
1.42" - Average rainfall in December:
1.02"
The wettest month (with the highest rainfall) is May (2.91").
The driest month (with the least rainfall) is January (0.83").
Average rainfall days
Hamilton, IL
- Average rainfall days in January:
4.9 days - Average rainfall days in February:
4.5 days - Average rainfall days in March:
12.6 days - Average rainfall days in April:
13.8 days - Average rainfall days in May:
16.8 days - Average rainfall days in June:
15.7 days
- Average rainfall days in July:
14.3 days - Average rainfall days in August:
11.5 days - Average rainfall days in September:
11.1 days - Average rainfall days in October:
10.1 days - Average rainfall days in November:
8.4 days - Average rainfall days in December:
6.2 days
The month with the highest number of rainy days is May (16.8 days).
The month with the least rainy days is February (4.5 days).
Average snowfall
Hamilton, IL
The month with the highest snowfall is January (2.91").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Hamilton, IL
- Average snowfall days in January:
7.9 days - Average snowfall days in February:
6.8 days - Average snowfall days in March:
3.3 days - Average snowfall days in April:
0.7 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:
0.3 days - Average snowfall days in November:
1.3 days - Average snowfall days in December:
4.9 days
The month with the highest number of snowfall days is January (7.9 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Hamilton, 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 2min - Average sunshine in February:
4h and 3min - Average sunshine in March:
6h and 4min - 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 2min - Average sunshine in August:
10h and 1min - Average sunshine in September:
9h and 3min - Average sunshine in October:
5h and 4min - Average sunshine in November:
5h and 2min - Average sunshine in December:
4h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 18min).
Average sunshine days
Hamilton, IL
- Average sunshine days in January:
19.6 days - Average sunshine days in February:
17.3 days - Average sunshine days in March:
15.4 days - Average sunshine days in April:
14.3 days - Average sunshine days in May:
12.1 days - Average sunshine days in June:
11.5 days
- Average sunshine days in July:
14.9 days - Average sunshine days in August:
17.5 days - Average sunshine days in September:
17.5 days - Average sunshine days in October:
19.8 days - Average sunshine days in November:
19.3 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 (11.5 days).
Average UV index
Hamilton, 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
Hamilton, IL
The month with the most cloud cover is January (Cloud cover 54).
The months with the least cloud cover are July and August (Cloud cover 28).
Average visibility
Hamilton, 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).
Hamilton, Illinois, USA
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