Record envelope, standing records and threshold days for Princeton (USC00116998), Illinois, United States, with 38 years of record.
Key Facts for Princeton
Princeton (USC00116998) is a weather station in Illinois, United States at 41.37 latitude and -89.45 longitude, 213 m (699 ft) above sea level.
The station reports from 1987 to 2024, 38 years of record.
1,464 records set at Princeton still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Princeton set a daily record high maximum temperature of 12.8 C (55.0 F) on 2 February 2024.
About the Station
Location: Illinois, United States, 41.37 latitude, -89.45 longitude.
Elevation: 213 m (699 ft).
Period of record: 1987 to 2024, 38 years.
Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
0 days at or beyond a record
Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Princeton. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Princeton, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
20.0 C (68.0 F)
-32.2 C (-26.0 F)
n/a
n/a
Feb
21.1 C (70.0 F)
-32.2 C (-26.0 F)
n/a
n/a
Mar
28.9 C (84.0 F)
-22.8 C (-9.0 F)
n/a
n/a
Apr
33.9 C (93.0 F)
-8.9 C (16.0 F)
n/a
n/a
May
36.1 C (97.0 F)
-2.2 C (28.0 F)
n/a
n/a
Jun
38.9 C (102.0 F)
4.4 C (39.9 F)
n/a
n/a
Jul
39.4 C (102.9 F)
8.9 C (48.0 F)
n/a
n/a
Aug
38.9 C (102.0 F)
7.8 C (46.0 F)
n/a
n/a
Sep
36.7 C (98.1 F)
-1.1 C (30.0 F)
n/a
n/a
Oct
31.7 C (89.1 F)
-7.2 C (19.0 F)
n/a
n/a
Nov
26.1 C (79.0 F)
-16.1 C (3.0 F)
n/a
n/a
Dec
21.7 C (71.1 F)
-27.8 C (-18.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Princeton still stand. 1991 holds the most, with 68.
Standing records at Princeton by the year they were set
Year set
Standing records
1987
2
1988
66
1989
58
1990
65
1991
68
1992
65
1993
21
1994
38
1995
33
1996
42
1997
43
1998
47
1999
32
2000
59
2001
43
2002
38
2003
34
2004
28
2005
43
2006
36
2007
32
2008
24
2009
30
2010
31
2011
35
2012
52
2013
27
2014
57
2015
45
2016
18
2017
43
2018
48
2019
36
2020
28
2021
36
2022
23
2023
34
2024
4
All-Time Record Progression
2 new records
2 all-time records were set at Princeton between 30 January 2019 and 31 January 2019. Each dot is a new record.
When Princeton set new all-time records
Date
Kind
Detail
2019-01-30
Record low minimum temperature
Record low minimum temperature -31.7 C (-25.1 F)
2019-01-31
Record low minimum temperature
Record low minimum temperature -32.2 C (-26.0 F)
Wettest Day of Each Month
Sep: 156.2 mm (6.1 in)
The wettest day on record for each calendar month at Princeton. The most was 156.2 mm (6.1 in) on 13 September 2008.
Record daily precipitation for each month at Princeton
Month
Record daily precipitation (mm)
Date
Jan
50.3 mm (2.0 in)
29 January 2001
Feb
91.4 mm (3.6 in)
21 February 1997
Mar
44.2 mm (1.7 in)
1 March 2017
Apr
98.3 mm (3.9 in)
18 April 2013
May
81.5 mm (3.2 in)
8 May 1995
Jun
116.8 mm (4.6 in)
29 June 1990
Jul
78.2 mm (3.1 in)
5 July 2022
Aug
67.3 mm (2.6 in)
10 August 2006
Sep
156.2 mm (6.1 in)
13 September 2008
Oct
86.6 mm (3.4 in)
15 October 2017
Nov
55.9 mm (2.2 in)
27 November 1990
Dec
49.3 mm (1.9 in)
14 December 2015
Period of Record Coverage
1987 to 2024
Complete yearUnder 90 percent of days
38 years of record at Princeton, 1987 to 2024. 2 years have data for under 90 percent of days and are left out of rankings: 1987, 2024.
Cooler than the station meanWarmer than the station mean
One stripe for each of 35 complete years at Princeton, 1988 to 2023. Blue stripes are years cooler than the station's own mean of 10.4 C (50.7 F); red stripes are warmer. The coolest year was 2014, at 7.7 C (45.9 F), and the warmest was 2012, at 12.4 C (54.3 F). The strongest colour marks a difference of 2.7 C (4.9 F).
Annual mean temperature at Princeton as warming stripes, 1988 to 2023
Year
Annual mean temperature
Difference from the station mean
1988
10.4 C
+0.07 C
1989
9.2 C
-1.15 C
1990
10.9 C
+0.53 C
1991
10.9 C
+0.52 C
1992
9.7 C
-0.62 C
1993
9.4 C
-0.97 C
1994
10.1 C
-0.29 C
1995
9.7 C
-0.67 C
1996
8.9 C
-1.51 C
1997
9.6 C
-0.78 C
1998
12.1 C
+1.71 C
1999
11.1 C
+0.69 C
2000
10.4 C
+0.06 C
2001
11.0 C
+0.59 C
2002
10.9 C
+0.50 C
2003
10.1 C
-0.27 C
2004
10.6 C
+0.26 C
2005
11.2 C
+0.87 C
2006
11.4 C
+1.01 C
2007
10.9 C
+0.53 C
2008
9.4 C
-0.98 C
2009
9.5 C
-0.83 C
2010
10.8 C
+0.42 C
2011
10.7 C
+0.36 C
2012
12.4 C
+2.02 C
2014
7.7 C
-2.64 C
2015
9.7 C
-0.65 C
2016
10.9 C
+0.57 C
2017
10.5 C
+0.09 C
2018
9.7 C
-0.66 C
2019
9.5 C
-0.85 C
2020
10.5 C
+0.18 C
2021
11.3 C
+0.95 C
2022
10.1 C
-0.27 C
2023
11.7 C
+1.38 C
The fitted trend in annual mean temperature here over 1988 to 2023 is 0.1 C (-0.2 to 0.4) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.2 F (-0.4 to 0.8) per decade. The slope is a straight line fitted to 35 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Princeton
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.1 C (-0.2 to 0.4) per decade
0.2 F (-0.4 to 0.8) per decade
1988 to 2023
35
Not clearly different from zero
Mean daily maximum
0.2 C (-0.1 to 0.6) per decade
0.4 F (-0.2 to 1.0) per decade
1988 to 2023
35
Not clearly different from zero
Mean daily minimum
-0.03 C (-0.35 to 0.29) per decade
-0.1 F (-0.6 to 0.5) per decade
1988 to 2023
35
Not clearly different from zero
A year is complete when all 12 months have at least 20 days of both daily maximum and daily minimum readings. The annual mean is the mean of the monthly means. The trend describes this one station over this period; it does not say what caused the change.
Extremes by Year
1987 to 2024
Yearly extremes at Princeton: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
39.4 C (102.9 F)
2012
35.6 C (96.1 F)
38
Coldest night (TNn)
-32.2 C (-26.0 F)
2019
-23.0 C (-9.5 F)
38
Wettest day (Rx1day)
156.2 mm (6.1 in)
2008
69.8 mm (2.7 in)
38
Wettest five days (Rx5day)
220.5 mm (8.7 in)
2008
102.8 mm (4.0 in)
38
Longest dry spell (CDD)
37 days
1999
20 days
38
Hottest day (TXx)
The hottest day of the year at Princeton, 1987 to 2024. The record is 39.4 C (102.9 F) in 2012, marked on the chart; the median year is 35.6 C (96.1 F).
Hottest day (TXx) at Princeton by year
Year
Hottest day (TXx)
1987
11.7 C (53.1 F)
1988
38.9 C (102.0 F)
1989
36.7 C (98.1 F)
1990
36.7 C (98.1 F)
1991
37.2 C (99.0 F)
1992
33.9 C (93.0 F)
1993
33.9 C (93.0 F)
1994
35.0 C (95.0 F)
1995
38.3 C (100.9 F)
1996
35.6 C (96.1 F)
1997
36.7 C (98.1 F)
1998
36.1 C (97.0 F)
1999
38.3 C (100.9 F)
2000
35.6 C (96.1 F)
2001
37.2 C (99.0 F)
2002
36.1 C (97.0 F)
2003
36.1 C (97.0 F)
2004
33.9 C (93.0 F)
2005
38.9 C (102.0 F)
2006
38.3 C (100.9 F)
2007
34.4 C (93.9 F)
2008
33.9 C (93.0 F)
2009
36.1 C (97.0 F)
2010
35.6 C (96.1 F)
2011
37.8 C (100.0 F)
2012
39.4 C (102.9 F)
2013
35.6 C (96.1 F)
2014
32.8 C (91.0 F)
2015
33.3 C (91.9 F)
2016
33.3 C (91.9 F)
2017
33.3 C (91.9 F)
2018
33.9 C (93.0 F)
2019
34.4 C (93.9 F)
2020
33.9 C (93.0 F)
2021
35.0 C (95.0 F)
2022
35.6 C (96.1 F)
2023
36.7 C (98.1 F)
2024
12.8 C (55.0 F)
Coldest night (TNn)
The coldest night of the year at Princeton, 1987 to 2024. The record is -32.2 C (-26.0 F) in 2019, marked on the chart; the median year is -23.0 C (-9.5 F).
Coldest night (TNn) at Princeton by year
Year
Coldest night (TNn)
1987
-13.3 C (8.1 F)
1988
-23.9 C (-11.0 F)
1989
-27.8 C (-18.0 F)
1990
-21.1 C (-6.0 F)
1991
-21.1 C (-6.0 F)
1992
-22.2 C (-8.0 F)
1993
-21.1 C (-6.0 F)
1994
-28.9 C (-20.0 F)
1995
-20.0 C (-4.0 F)
1996
-30.0 C (-22.0 F)
1997
-23.9 C (-11.0 F)
1998
-20.0 C (-4.0 F)
1999
-28.3 C (-18.9 F)
2000
-25.0 C (-13.0 F)
2001
-20.6 C (-5.1 F)
2002
-21.1 C (-6.0 F)
2003
-20.0 C (-4.0 F)
2004
-23.3 C (-9.9 F)
2005
-21.1 C (-6.0 F)
2006
-22.2 C (-8.0 F)
2007
-22.8 C (-9.0 F)
2008
-24.4 C (-11.9 F)
2009
-28.3 C (-18.9 F)
2010
-22.8 C (-9.0 F)
2011
-21.7 C (-7.1 F)
2012
-16.7 C (1.9 F)
2013
-22.2 C (-8.0 F)
2014
-27.8 C (-18.0 F)
2015
-25.0 C (-13.0 F)
2016
-25.0 C (-13.0 F)
2017
-23.3 C (-9.9 F)
2018
-28.9 C (-20.0 F)
2019
-32.2 C (-26.0 F)
2020
-22.8 C (-9.0 F)
2021
-23.9 C (-11.0 F)
2022
-23.3 C (-9.9 F)
2023
-18.3 C (-0.9 F)
2024
-23.9 C (-11.0 F)
Wettest day (Rx1day)
The wettest day of the year at Princeton, 1987 to 2024. The record is 156.2 mm (6.1 in) in 2008, marked on the chart; the median year is 69.8 mm (2.7 in).
Wettest day (Rx1day) at Princeton by year
Year
Wettest day (Rx1day)
1987
26.4 mm (1.0 in)
1988
37.3 mm (1.5 in)
1989
104.1 mm (4.1 in)
1990
116.8 mm (4.6 in)
1991
62.5 mm (2.5 in)
1992
59.7 mm (2.4 in)
1993
82.6 mm (3.3 in)
1994
101.6 mm (4.0 in)
1995
81.5 mm (3.2 in)
1996
49.5 mm (1.9 in)
1997
91.4 mm (3.6 in)
1998
75.2 mm (3.0 in)
1999
51.3 mm (2.0 in)
2000
42.4 mm (1.7 in)
2001
54.4 mm (2.1 in)
2002
73.7 mm (2.9 in)
2003
68.8 mm (2.7 in)
2004
51.1 mm (2.0 in)
2005
59.7 mm (2.4 in)
2006
67.3 mm (2.6 in)
2007
69.9 mm (2.8 in)
2008
156.2 mm (6.1 in)
2009
77.7 mm (3.1 in)
2010
70.6 mm (2.8 in)
2011
69.6 mm (2.7 in)
2012
49.3 mm (1.9 in)
2013
98.3 mm (3.9 in)
2014
62.7 mm (2.5 in)
2015
112.5 mm (4.4 in)
2016
65.0 mm (2.6 in)
2017
86.6 mm (3.4 in)
2018
64.0 mm (2.5 in)
2019
149.9 mm (5.9 in)
2020
42.2 mm (1.7 in)
2021
85.3 mm (3.4 in)
2022
78.2 mm (3.1 in)
2023
102.9 mm (4.1 in)
2024
14.2 mm (0.6 in)
Wettest five days (Rx5day)
The wettest five days of the year at Princeton, 1987 to 2024. The record is 220.5 mm (8.7 in) in 2008, marked on the chart; the median year is 102.8 mm (4.0 in).
Wettest five days (Rx5day) at Princeton by year
Year
Wettest five days (Rx5day)
1987
28.8 mm (1.1 in)
1988
56.4 mm (2.2 in)
1989
129.3 mm (5.1 in)
1990
133.1 mm (5.2 in)
1991
101.9 mm (4.0 in)
1992
77.7 mm (3.1 in)
1993
103.4 mm (4.1 in)
1994
169.7 mm (6.7 in)
1995
99.1 mm (3.9 in)
1996
93.8 mm (3.7 in)
1997
116.8 mm (4.6 in)
1998
109.8 mm (4.3 in)
1999
82.8 mm (3.3 in)
2000
88.3 mm (3.5 in)
2001
84.9 mm (3.3 in)
2002
105.5 mm (4.2 in)
2003
139.4 mm (5.5 in)
2004
68.3 mm (2.7 in)
2005
69.8 mm (2.7 in)
2006
105.9 mm (4.2 in)
2007
114.8 mm (4.5 in)
2008
220.5 mm (8.7 in)
2009
99.3 mm (3.9 in)
2010
102.1 mm (4.0 in)
2011
115.0 mm (4.5 in)
2012
71.8 mm (2.8 in)
2013
160.2 mm (6.3 in)
2014
112.4 mm (4.4 in)
2015
151.6 mm (6.0 in)
2016
79.7 mm (3.1 in)
2017
141.3 mm (5.6 in)
2018
83.3 mm (3.3 in)
2019
156.3 mm (6.2 in)
2020
94.0 mm (3.7 in)
2021
97.0 mm (3.8 in)
2022
105.4 mm (4.1 in)
2023
117.7 mm (4.6 in)
2024
37.9 mm (1.5 in)
Longest dry spell (CDD)
The longest dry spell of the year at Princeton, 1987 to 2024. The record is 37 days in 1999, marked on the chart; the median year is 20 days.
Longest dry spell (CDD) at Princeton by year
Year
Longest dry spell (CDD)
1987
6 days
1988
20 days
1989
21 days
1990
16 days
1991
31 days
1992
22 days
1993
20 days
1994
23 days
1995
29 days
1996
20 days
1997
15 days
1998
17 days
1999
37 days
2000
27 days
2001
19 days
2002
23 days
2003
20 days
2004
24 days
2005
19 days
2006
18 days
2007
24 days
2008
13 days
2009
27 days
2010
20 days
2011
20 days
2012
20 days
2013
23 days
2014
21 days
2015
31 days
2016
19 days
2017
21 days
2018
24 days
2019
14 days
2020
21 days
2021
17 days
2022
20 days
2023
26 days
2024
10 days
Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.
Frost Dates and Growing Season
35 years with a frost
Across 35 years with a frost, the median last spring frost at Princeton falls on 15 April and the median first autumn frost on 16 October, which leaves a median of 179 days between them.
Fitted over all years, the growing season changes by +2.1 days per decade at this station.
Frost dates and growing season at Princeton
Measure
Median, all years
Earliest period
Recent period (1993 to 2023)
Recent against earliest
Fitted trend
Last spring frost
15 April
n/a
15 April
n/a
+2.3 days per decade
First autumn frost
16 October
n/a
17 October
n/a
+4.4 days per decade
Growing days
179 days
n/a
179 days
n/a
+2.1 days per decade
A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.
Rainfall Return Levels
36 years, 1988 to 2023
A day with at least 71.4 mm (2.8 in) of rain is expected about once in 2 years. A day with at least 172.6 mm (6.8 in) of rain is expected about once in 100 years.
Rainfall return levels at Princeton: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
71.4 mm (2.8 in)
5 years
95.7 mm (3.8 in)
10 years
112.9 mm (4.4 in)
25 years
135.8 mm (5.3 in)
50 years
153.9 mm (6.1 in)
Longer than the 36 years of record
100 years
172.6 mm (6.8 in)
Longer than the 36 years of record
The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 36 years of values from 1988 to 2023.
A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.
The largest wettest-day totals in the fit: 156.2 mm (6.1 in) in 2008; 149.9 mm (5.9 in) in 2019; 116.8 mm (4.6 in) in 1990.
Download the Data
Data for Princeton standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Princeton threshold days by year: CSV or JSON. Field meanings are on the data page.
Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-14 (14 October 2026). Records are computed by this site and are not official.