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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, like December, is a freezing cold winter month in Princeton, Illinois, with an average temperature varying between 28.8°F (-1.8°C) and 16.5°F (-8.6°C). January, characterized by an average high temperature of 28.8°F (-1.8°C) and a low temperature of 16.5°F (-8.6°C), is generally the coldest month. Weather in January »
Weather in February
February, the last month of the winter in Princeton, is an icy month, with an average temperature fluctuating between 32.7°F (0.4°C) and 19.8°F (-6.8°C). Princeton's weather, upon February's arrival, documents an average high-temperature of an icy 32.7°F (0.4°C), nearly identical to the prior month. Weather in February »
Weather in March
The first month of the spring, March, is a frosty month in Princeton, Illinois, with an average temperature varying between 32°F (0°C) and 46.8°F (8.2°C). March indicates a change in the average high-temperature, moving up from an icy 32.7°F (0.4°C) in February to a chilly 46.8°F (8.2°C). Weather in March »
Weather in April
April in Princeton, Illinois, is a refreshing spring month, with an average temperature ranging between min 42.4°F (5.8°C) and max 58.6°F (14.8°C). With the onset of April, Princeton's weather sees a temperature rise, transitioning from a frosty 46.8°F (8.2°C) in March to a moderate 58.6°F (14.8°C). Weather in April »
Weather in May
May, the last month of the spring in Princeton, is a pleasant month, with an average temperature ranging between max 70.3°F (21.3°C) and min 53.4°F (11.9°C). May comes with an increase, with the average high-temperature moving from a moderate 58.6°F (14.8°C) in April to an agreeable 70.3°F (21.3°C). Weather in May »
Weather in June
June, the first month of the summer in Princeton, is a moderately hot month, with temperature in the range of an average high of 78.6°F (25.9°C) and an average low of 61.5°F (16.4°C). The start of June signals a slight increase in the average high-temperature, moving from a pleasant 70.3°F (21.3°C) in May to a moderately hot 78.6°F (25.9°C). Weather in June »
Weather in July
July, like June, in Princeton, Illinois, is a moderately hot summer month, with an average temperature varying between 80.6°F (27°C) and 64.2°F (17.9°C). July registers as the month with the highest average temperatures, reaching 80.6°F (27°C) at its peak and 64.2°F (17.9°C) at the lowest. July's mean heat index is estimated at a tropical 86°F (30°C). Weather in July »
Weather in August
August, the last month of the summer in Princeton, is another warm month, with an average temperature ranging between max 79.5°F (26.4°C) and min 62.1°F (16.7°C). Shifting into August, Princeton records an average high-temperature of a still warm 79.5°F (26.4°C), presenting minor fluctuations compared to the previous month. Weather in August »
Weather in September
The first month of the autumn, September, is also a moderately hot month in Princeton, Illinois, with an average temperature fluctuating between 56.1°F (13.4°C) and 74.7°F (23.7°C). The average high-temperature during September is a still warm 74.7°F (23.7°C), almost matching the conditions of the preceding month. Weather in September »
Weather in October
October, like September, in Princeton, Illinois, is another refreshing autumn month, with an average temperature ranging between min 45.3°F (7.4°C) and max 61.2°F (16.2°C). In the transition to October, Princeton observes a drop in the average high-temperature, moving from a warm 74.7°F (23.7°C) in September to a refreshing 61.2°F (16.2°C). Weather in October »
Weather in November
November, the last month of the autumn in Princeton, is also a frosty month, with an average temperature varying between 46.4°F (8°C) and 33.6°F (0.9°C). In Princeton, the onset of November is marked by a decreased average high-temperature, declining from October's enjoyable 61.2°F (16.2°C) to a chilly 46.4°F (8°C). Weather in November »
Weather in December
December, the first month of the winter in Princeton, is also an icy month, with an average temperature fluctuating between 24.1°F (-4.4°C) and 34.5°F (1.4°C). The arrival of December corresponds with a shift in temperature, down from a frosty 46.4°F (8°C) in November to a cold 34.5°F (1.4°C). Weather in December »
[Resources]Frequently asked questions
What month is the coldest in Princeton?
The coldest period in Princeton is January, when temperatures fluctuate between an average high of 28.8°F (-1.8°C) and a low of 16.5°F (-8.6°C).
What is the driest month in Princeton?
The month with the least rainfall in Princeton, Illinois, is January, when the rain falls for 4.8 days and typically collects 0.75" (19mm) of precipitation.
How many days does it rain in Princeton?
Throughout the year, there are 130 rainfall days, and 17.64" (448mm) of precipitation is accumulated.
When does it snow in Princeton?
Months with snowfall are January through April, October through December.
When does it snow the most in Princeton?
January is the month with the most snowfall. Snow falls for 10.4 days and accumulates 2.09" (53mm) of snow.
How many days does it snow in Princeton?
In Princeton, Illinois, during the entire year, snow falls for 33.4 days and aggregates up to 7.05" (179mm) of snow.
What is the month with the least sunshine in Princeton?
The month with the least sunshine in Princeton is January, with an average of 3.8h of sunshine.
When is the lowest UV index in Princeton?
January and December, with an average maximum UV index of 1, are months with the lowest UV index in Princeton, Illinois.
When is Daylight Saving Time (DST) in Princeton?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Princeton, Illinois, 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 Princeton?
May is the month with the most rainfall in Princeton, Illinois. Rain falls for 17 days and accumulates 2.91" (74mm) of precipitation.
When it does not snow in Princeton?
In Princeton, snow does not fall in May through September.
When are the longest days in Princeton?
The month with the longest days is June, with an average of 15h and 6min of daylight.
What are the months with the most sunshine in Princeton?
June and July, with an average of 9.7h of sunshine, are months with the most sunshine in Princeton, Illinois.
What are the warmest months in Princeton?
July, recording an average high temperature of 80.6°F (27°C) and a low temperature of 64.2°F (17.9°C), is Princeton's warmest month.
What is the most humid month in Princeton?
The most humid month in Princeton is July, with an average relative humidity of 85%.
When is the highest UV index in Princeton?
With an average maximum UV index of 6, July is the month with the highest UV index in Princeton.
What is the least humid month in Princeton?
The least humid month is October, with an average relative humidity of 72%.
What is the month with the shortest days in Princeton?
With an average of 9h and 12min of daylight, December has the shortest days of the year in Princeton.
Average temperature
Princeton, IL
The warmest month (with the highest average high temperature) is July (80.6°F).
The month with the lowest average high temperature is January (28.8°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 (16.5°F).
Average pressure
Princeton, IL
- Average pressure in January:
30.13"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:
29.95"Hg - Average pressure in June:
29.91"Hg
- Average pressure in July:
29.97"Hg - Average pressure in August:
29.97"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 (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed
Princeton, IL
- Average wind speed in January:
10.3mph - Average wind speed in February:
10.3mph - Average wind speed in March:
10.1mph - Average wind speed in April:
10.5mph - Average wind speed in May:
8.9mph - Average wind speed in June:
7.7mph
- Average wind speed in July:
6.6mph - Average wind speed in August:
6.4mph - Average wind speed in September:
7.6mph - Average wind speed in October:
9.2mph - Average wind speed in November:
9.9mph - Average wind speed in December:
9.6mph
The windiest month (with the highest average wind speed) is April (10.5mph).
The calmest month (with the lowest average wind speed) is August (6.4mph).
Average humidity
Princeton, IL
The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is October (72%).
Average rainfall
Princeton, IL
- Average rainfall in January:
0.75" - Average rainfall in February:
0.83" - Average rainfall in March:
1.1" - Average rainfall in April:
2.09" - Average rainfall in May:
2.91" - Average rainfall in June:
1.89"
- Average rainfall in July:
1.77" - Average rainfall in August:
1.5" - Average rainfall in September:
1.22" - Average rainfall in October:
1.65" - Average rainfall in November:
1.02" - Average rainfall in December:
0.91"
The wettest month (with the highest rainfall) is May (2.91").
The driest month (with the least rainfall) is January (0.75").
Average rainfall days
Princeton, IL
- Average rainfall days in January:
4.8 days - Average rainfall days in February:
4.5 days - Average rainfall days in March:
10.6 days - Average rainfall days in April:
14.7 days - Average rainfall days in May:
17 days - Average rainfall days in June:
15.8 days
- Average rainfall days in July:
14.3 days - Average rainfall days in August:
12.8 days - Average rainfall days in September:
10.5 days - Average rainfall days in October:
10.7 days - Average rainfall days in November:
8.1 days - Average rainfall days in December:
6.2 days
The month with the highest number of rainy days is May (17 days).
The month with the least rainy days is February (4.5 days).
Average snowfall
Princeton, IL
The month with the highest snowfall is January (2.09").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days
Princeton, IL
- Average snowfall days in January:
10.4 days - Average snowfall days in February:
8.5 days - Average snowfall days in March:
3.6 days - Average snowfall days in April:
0.8 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:
0.4 days - Average snowfall days in November:
2.5 days - Average snowfall days in December:
7.1 days
The month with the highest number of snowfall days is January (10.4 days).
The months with the least snowfall days are May, June, July and August (0 days).
Average daylight / Average sunshine
Princeton, 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 3min - Average daylight in June:
15h and 1min
- Average daylight in July:
14h and 5min - Average daylight in August:
13h and 5min - Average daylight in September:
12h and 3min - Average daylight in October:
11h and 1min - Average daylight in November:
9h and 5min - Average daylight in December:
9h and 1min
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 12min).
- Average sunshine in January:
3h and 5min - Average sunshine in February:
4h and 0min - Average sunshine in March:
6h and 2min - Average sunshine in April:
7h and 5min - Average sunshine in May:
8h and 4min - Average sunshine in June:
9h and 4min
- Average sunshine in July:
9h and 4min - Average sunshine in August:
9h and 4min - Average sunshine in September:
8h and 5min - Average sunshine in October:
5h and 4min - Average sunshine in November:
5h and 1min - Average sunshine in December:
4h and 1min
The months with the most sunshine are June and July (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days
Princeton, IL
- Average sunshine days in January:
17.8 days - Average sunshine days in February:
15.6 days - Average sunshine days in March:
17 days - Average sunshine days in April:
13.4 days - Average sunshine days in May:
11.9 days - Average sunshine days in June:
11.8 days
- Average sunshine days in July:
12.9 days - Average sunshine days in August:
15.4 days - Average sunshine days in September:
17.6 days - Average sunshine days in October:
18.1 days - Average sunshine days in November:
19.5 days - Average sunshine days in December:
17.5 days
The month with the most sunshine days is November (19.5 days).
The month with the least sunshine days is June (11.8 days).
Average UV index
Princeton, IL
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover
Princeton, IL
The month with the most cloud cover is January (Cloud cover 60).
The month with the least cloud cover is September (Cloud cover 32).
Average visibility
Princeton, IL
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).
Princeton, Illinois, USA
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