Princeton, Illinois Climate

United States

Pop. 7,594 Elev. 219 m / 719 ft TZ: America/Chicago (UTC-5) ·

Dry and warm, Princeton sees July highs of 88°F (31°C) and cold January lows of 16°F (-9°C). Humidity pushes the summer feels-like temperature to 100°F (38°C), while wind chill can drive winter lows to 7°F (-14°C). Expect around 42 rainy days annually (28.3 in / 719 mm total), with snow on 3 days and 31 in (787 mm) of annual accumulation. The city averages 127 sunny days per year and around 30 thunderstorm days. Nearby lake water reaches 79°F (26°C) in summer.

Temperature 88°F (31°C) high 16°F (-9°C) low
Feels like 100°F (38°C) high 7°F (-14°C) low
Rain 42 days 28.3 in (719 mm) /yr
Snow 3 days 31.0 in (787 mm) /yr
Sky 127 sunny 30 stormy
Wind 2.7 mph (1.2 m/s) avg

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Monthly Climate Chart

↓ Monthly data table
Best months to visit: Apr, Jun, Sep, Oct

Sky & Air by Month

Cloud cover (%)
52
Jan
60
Feb
52
Mar
67
Apr
57
May
52
Jun
64
Jul
51
Aug
38
Sep
44
Oct
54
Nov
73
Dec
Humidity (%)
61
Jan
65
Feb
58
Mar
60
Apr
58
May
62
Jun
71
Jul
74
Aug
59
Sep
60
Oct
65
Nov
77
Dec

Weather Days by Month

↓ Weather days table

Water Temperatures

↓ Water temperatures table

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Nearby Cities

Nearby

Commercial airport 50 mi General Wayne A. Downing Peoria International Airport (PIA)
Ski resort 70 mi
National park 99 mi Historic Pullman Foundation Exhibit Hall
Hospital 0 mi OSF Saint Clare Medical Center
Hiking trail 26 mi ADT - Illinois - I - Seg 3

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Monthly Weather Data

↑ See chart
Month Avg High Avg Low Rainfall Snowfall Sunny Days
January 32°F 0°C 16°F -9°C 0.7 in 18 mm 4.0 in101 mm 14
February 36°F 2°C 21°F -6°C 0.2 in 6 mm 5.4 in136 mm 8
March 58°F 15°C 37°F 3°C 3.2 in 80 mm 5.5 in138 mm 12
April 64°F 18°C 45°F 7°C 3.0 in 75 mm 6
May 73°F 23°C 52°F 11°C 3.6 in 91 mm 10
June 87°F 30°C 66°F 19°C 2.7 in 70 mm 10
July 88°F 31°C 71°F 22°C 5.7 in 145 mm 7
August 81°F 27°C 64°F 18°C 3.4 in 85 mm 15
September 82°F 28°C 57°F 14°C 1.2 in 29 mm 19
October 70°F 21°C 50°F 10°C 1.9 in 48 mm 13
November 52°F 11°C 36°F 2°C 1.1 in 28 mm 9.2 in233 mm 10
December 35°F 2°C 20°F -7°C 1.8 in 44 mm 7.0 in179 mm 3

Weather Days by Month

↑ See chart
Month Sunny Days Storm Days
January 14 0
February 8 0
March 12 5
April 6 2
May 10 2
June 10 3
July 7 7
August 15 5
September 19 2
October 13 2
November 10 1
December 3 1

Water Temperatures Data

↑ See chart
Month Lake Avg High
January 32°F 0°C
February 32°F 0°C
March 42°F 6°C
April 53°F 12°C
May 61°F 16°C
June 73°F 23°C
July 79°F 26°C
August 75°F 24°C
September 68°F 20°C
October 59°F 15°C
November 43°F 6°C
December 32°F 0°C