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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, is another cold winter month in Trenton, Illinois, with an average temperature varying between 37.8°F (3.2°C) and 24.8°F (-4°C). Trenton witnesses the coldest weather in January, with temperatures averaging a high of 37.8°F (3.2°C) and a low of 24.8°F (-4°C). Weather in January »
Weather in February
February, the last month of the winter in Trenton, is also a wintry month, with temperature in the range of an average high of 42.3°F (5.7°C) and an average low of 27.9°F (-2.3°C). During February, the average high-temperature is a still cold 42.3°F (5.7°C), maintaining a close resemblance to that of the preceding month. Weather in February »
Weather in March
The first month of the spring, March, is a fresh month in Trenton, Illinois, with an average temperature fluctuating between 37.9°F (3.3°C) and 54.1°F (12.3°C). An upsurge in temperatures occurs as February gives way to March, with average highs shifting from an icy 42.3°F (5.7°C) to a fresh 54.1°F (12.3°C). Weather in March »
Weather in April
April in Trenton, Illinois, is a comfortable spring month, with an average temperature varying between 47.7°F (8.7°C) and 64.9°F (18.3°C). With the onset of April, Trenton's weather sees a temperature rise, transitioning from a fresh 54.1°F (12.3°C) in March to a comfortable 64.9°F (18.3°C). Weather in April »
Weather in May
The last month of the spring, May, is a moderately hot month in Trenton, Illinois, with an average temperature varying between 74.7°F (23.7°C) and 57.7°F (14.3°C). Trenton in May sees a temperature change, with average high-temperatures moving from a refreshing 64.9°F (18.3°C) in April to a moderately hot 74.7°F (23.7°C). Weather in May »
Weather in June
June, the first month of the summer in Trenton, is still a warm month, with an average temperature fluctuating between 66.4°F (19.1°C) and 83.5°F (28.6°C). The arrival of June signals a slight increase in the average high-temperature, moving from 74.7°F (23.7°C) in May to a still moderately hot 83.5°F (28.6°C). Weather in June »
Weather in July
July, the same as June, is another warm summer month in Trenton, Illinois, with an average temperature fluctuating between 85.6°F (29.8°C) and 68°F (20°C). Trenton experiences its highest temperatures in July, with an average peak of 85.6°F (29.8°C) and a low of 68°F (20°C). The heat index value for July is estimated at a torrid 98.6°F (37°C). Weather in July »
Weather in August
The last month of the summer, August, is another warm month in Trenton, Illinois, with an average temperature varying between 65.8°F (18.8°C) and 83.8°F (28.8°C). With the advent of August, Trenton's high-temperatures adjust to a still warm 83.8°F (28.8°C), closely aligning with the preceding month. Weather in August »
Weather in September
The first month of the autumn, September, is also a moderately hot month in Trenton, Illinois, with an average temperature ranging between max 78.8°F (26°C) and min 59.9°F (15.5°C). As Trenton steps into September, the average high-temperature holds at a still warm 78.8°F (26°C), hinting at a minor fluctuation from the prior month. Weather in September »
Weather in October
October, the same as September, is another refreshing autumn month in Trenton, Illinois, with temperature in the range of an average low of 49.1°F (9.5°C) and an average high of 66.4°F (19.1°C). The onset of October entails a temperature shift, as the average high-temperature decreases from a warm 78.8°F (26°C) in September to a refreshing 66.4°F (19.1°C). Weather in October »
Weather in November
The last month of the autumn, November, is also a fresh month in Trenton, Illinois, with an average temperature ranging between min 37.8°F (3.2°C) and max 52.9°F (11.6°C). A shift in the average high-temperature occurs in November, reducing from a refreshing 66.4°F (19.1°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 Trenton, is also an icy month, with an average temperature ranging between max 42.3°F (5.7°C) and min 30.2°F (-1°C). Trenton's transition into December involves a shift in temperature, receding from a cool 52.9°F (11.6°C) in November to a cold 42.3°F (5.7°C). Weather in December »
Updated: Aug 18, 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 Trenton?
January, with average temperatures reaching a high of 37.8°F (3.2°C) and a low of 24.8°F (-4°C), is the coldest month.
How many days does it rain?
In Trenton, during the entire year, the rain falls for 151.1 days and collects up to 30.43" (773mm) of precipitation.
When does it snow?
January through April, October through December are months with snowfall.
How many days does it snow?
In Trenton, during the entire year, snow falls for 22.4 days and aggregates up to 6.1" (155mm) of snow.
What are the months with the least sunshine?
January and February, with an average of 4.6h of sunshine, are months with the least sunshine.
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 Trenton.
What is the driest month?
The month with the least rainfall is February, when the rain falls for 8.9 days and typically collects 1.5" (38mm) of precipitation.
What is the snowiest month?
February is the month with the most snowfall. Snow falls for 6.3 days and accumulates 1.85" (47mm) of snow.
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.
When it does not snow?
May through September are months without snowfall.
When is the highest UV index?
The months with the highest UV index are May through August, with an average maximum UV index of 6.
What is the rainiest month?
June is the month with the most rainfall in Trenton, Illinois. Rain falls for 16.2 days and accumulates 3.66" (93mm) of precipitation.
When are the longest days in Trenton?
June has the longest days of the year, with an average of 14h and 48min of daylight.
What month has the most sunshine?
The month with the most sunshine is June, with an average of 10.5h of sunshine.
What part of the year is the hottest?
July proves to be the warmest month, recording an average peak temperature of 85.6°F (29.8°C) and a minimum temperature of 68°F (20°C).
What is the most humid month?
The most humid month in Trenton is July, with an average relative humidity of 80%.
What is the least humid month in Trenton?
October is the least humid month, with an average relative humidity of 71%.
What is the month with the shortest days?
With an average of 9h and 30min of daylight, December has the shortest days of the year.
Average temperature
Trenton, 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 (37.8°F).
The month with the highest average low temperature is July (68°F).
The coldest month (with the lowest average low temperature) is January (24.8°F).
Average pressure
Trenton, 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:
29.93"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:
30.13"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 (29.93"Hg).
Average wind speed
Trenton, IL
- Average wind speed in January:
9.6mph - Average wind speed in February:
9.5mph - Average wind speed in March:
9.4mph - Average wind speed in April:
9.2mph - Average wind speed in May:
7.6mph - Average wind speed in June:
6.6mph
- Average wind speed in July:
5.7mph - 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 (9.6mph).
The calmest months (with the lowest average wind speed) are July and August (5.7mph).
Average humidity
Trenton, IL
The month with the highest relative humidity is July (80%).
The month with the lowest relative humidity is October (71%).
Average rainfall
Trenton, IL
- Average rainfall in January:
1.89" - Average rainfall in February:
1.5" - Average rainfall in March:
2.28" - Average rainfall in April:
3.43" - Average rainfall in May:
3.58" - Average rainfall in June:
3.66"
- Average rainfall in July:
3.31" - Average rainfall in August:
3.07" - Average rainfall in September:
1.77" - Average rainfall in October:
2.32" - Average rainfall in November:
1.73" - Average rainfall in December:
1.89"
The wettest month (with the highest rainfall) is June (3.66").
The driest month (with the least rainfall) is February (1.5").
Average rainfall days
Trenton, IL
- Average rainfall days in January:
8 days - Average rainfall days in February:
8.9 days - Average rainfall days in March:
14.3 days - Average rainfall days in April:
14.9 days - Average rainfall days in May:
17.3 days - Average rainfall days in June:
16.2 days
- Average rainfall days in July:
17.1 days - Average rainfall days in August:
13.7 days - Average rainfall days in September:
12 days - Average rainfall days in October:
10.5 days - Average rainfall days in November:
9.7 days - Average rainfall days in December:
8.5 days
The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is January (8 days).
Average snowfall
Trenton, IL
The month with the highest snowfall is February (1.85").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Trenton, IL
- Average snowfall days in January:
7.5 days - Average snowfall days in February:
6.3 days - Average snowfall days in March:
2.3 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 days - Average snowfall days in October:
0.1 days - Average snowfall days in November:
1.4 days - Average snowfall days in December:
4.5 days
The month with the highest number of snowfall days is January (7.5 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Trenton, IL
- Average daylight in January:
9h and 5min - Average daylight in February:
10h and 5min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 1min - Average daylight in May:
14h and 2min - Average daylight in June:
14h and 5min
- Average daylight in July:
14h and 3min - 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:
10h and 1min - Average daylight in December:
9h and 3min
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 4min - Average sunshine in February:
4h and 4min - Average sunshine in March:
6h and 2min - Average sunshine in April:
8h and 2min - Average sunshine in May:
9h and 2min - Average sunshine in June:
10h and 3min
- Average sunshine in July:
10h and 2min - Average sunshine in August:
10h and 1min - Average sunshine in September:
9h and 2min - Average sunshine in October:
6h and 2min - Average sunshine in November:
5h and 3min - Average sunshine in December:
4h and 5min
The month with the most sunshine is June (Average sunshine: 10h and 30min).
The months with the least sunshine are January and February (Average sunshine: 4h and 36min).
Average sunshine days
Trenton, IL
- Average sunshine days in January:
16.4 days - Average sunshine days in February:
14.1 days - Average sunshine days in March:
13.8 days - Average sunshine days in April:
13 days - Average sunshine days in May:
11.2 days - Average sunshine days in June:
11.4 days
- Average sunshine days in July:
11 days - Average sunshine days in August:
14.9 days - Average sunshine days in September:
15.8 days - Average sunshine days in October:
18.8 days - Average sunshine days in November:
18.4 days - Average sunshine days in December:
18 days
The month with the most sunshine days is October (18.8 days).
The month with the least sunshine days is July (11 days).
Average UV index
Trenton, 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
Trenton, IL
The month with the most cloud cover is January (Cloud cover 51).
The month with the least cloud cover is June (Cloud cover 28).
Average visibility
Trenton, 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).
Trenton, Illinois, USA
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