Record envelope, standing records and threshold days for Peru (USC00116753), Illinois, United States, with 64 years of record.
Key Facts for Peru
Peru (USC00116753) is a weather station in Illinois, United States at 41.35 latitude and -89.11 longitude, 193 m (634 ft) above sea level.
The station reports from 1963 to 2026, 64 years of record.
1,464 records set at Peru still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Peru set a daily record high minimum temperature of 22.2 C (72.0 F) on 28 July 2026.
About the Station
Location: Illinois, United States, 41.35 latitude, -89.11 longitude.
Elevation: 193 m (634 ft).
Period of record: 1963 to 2026, 64 years.
Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
9 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 Peru. The lines show the 2026 daily maximum and minimum. 9 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Peru, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
18.9 C (66.0 F)
-32.2 C (-26.0 F)
15.6 C (60.1 F)
-23.3 C (-9.9 F)
Feb
24.4 C (75.9 F)
-30.0 C (-22.0 F)
20.6 C (69.1 F)
-16.1 C (3.0 F)
Mar
28.9 C (84.0 F)
-23.3 C (-9.9 F)
28.3 C (82.9 F)
-13.3 C (8.1 F)
Apr
32.8 C (91.0 F)
-10.6 C (12.9 F)
28.3 C (82.9 F)
-2.2 C (28.0 F)
May
37.2 C (99.0 F)
-3.9 C (25.0 F)
31.7 C (89.1 F)
0.0 C (32.0 F)
Jun
38.3 C (100.9 F)
2.8 C (37.0 F)
32.8 C (91.0 F)
10.0 C (50.0 F)
Jul
40.0 C (104.0 F)
5.6 C (42.1 F)
33.9 C (93.0 F)
10.6 C (51.1 F)
Aug
39.4 C (102.9 F)
4.4 C (39.9 F)
n/a
n/a
Sep
36.7 C (98.1 F)
-2.8 C (27.0 F)
n/a
n/a
Oct
32.8 C (91.0 F)
-8.9 C (16.0 F)
n/a
n/a
Nov
26.1 C (79.0 F)
-20.6 C (-5.1 F)
n/a
n/a
Dec
21.1 C (70.0 F)
-29.4 C (-20.9 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Peru still stand. 1988 holds the most, with 48.
Standing records at Peru by the year they were set
Year set
Standing records
1963
13
1964
24
1965
27
1966
25
1967
42
1968
24
1969
22
1970
25
1971
12
1972
28
1973
19
1974
21
1975
19
1976
34
1977
36
1978
16
1979
25
1980
17
1981
13
1982
20
1983
39
1984
32
1985
20
1986
25
1987
19
1988
48
1989
38
1990
35
1991
36
1992
23
1993
15
1994
23
1995
14
1996
25
1997
22
1998
22
1999
21
2000
36
2001
18
2002
27
2003
14
2004
15
2005
26
2006
25
2007
21
2008
11
2009
16
2010
13
2011
10
2012
41
2013
18
2014
32
2015
18
2016
11
2017
27
2018
36
2019
22
2020
13
2021
25
2022
14
2023
10
2024
19
2025
11
2026
16
All-Time Record Progression
3 new records
3 all-time records were set at Peru between 12 January 1999 and 2 July 2026. Each dot is a new record.
When Peru set new all-time records
Date
Kind
Detail
1999-01-12
Record snow depth
Record snow depth 48.3 cm (19.0 in)
2006-12-01
Record daily snowfall
Record daily snowfall 43.2 cm (17.0 in)
2026-07-02
Record high minimum temperature
Record high minimum temperature 26.1 C (79.0 F)
Wettest Day of Each Month
Aug: 114.3 mm (4.5 in)
The wettest day on record for each calendar month at Peru. The most was 114.3 mm (4.5 in) on 20 August 1979.
Record daily precipitation for each month at Peru
Month
Record daily precipitation (mm)
Date
Jan
44.2 mm (1.7 in)
12 January 1966
Feb
73.7 mm (2.9 in)
21 February 1997
Mar
78.7 mm (3.1 in)
3 March 1985
Apr
61.0 mm (2.4 in)
2 April 1983
May
108.0 mm (4.3 in)
17 May 1974
Jun
88.9 mm (3.5 in)
13 June 1981
Jul
105.4 mm (4.1 in)
22 July 1997
Aug
114.3 mm (4.5 in)
20 August 1979
Sep
81.8 mm (3.2 in)
6 September 1989
Oct
99.6 mm (3.9 in)
10 October 1969
Nov
55.4 mm (2.2 in)
30 November 2006
Dec
74.9 mm (2.9 in)
24 December 1965
Period of Record Coverage
1963 to 2026
Complete yearUnder 90 percent of days
64 years of record at Peru, 1963 to 2026. 5 years have data for under 90 percent of days and are left out of rankings: 1963, 1971, 1980, 1986, 2026.
Cooler than the station meanWarmer than the station mean
One stripe for each of 55 complete years at Peru, 1964 to 2025. Blue stripes are years cooler than the station's own mean of 9.9 C (49.9 F); red stripes are warmer. The coolest year was 2014, at 7.8 C (46.1 F), and the warmest was 2012, at 11.8 C (53.3 F). The strongest colour marks a difference of 2.2 C (4.0 F).
Annual mean temperature at Peru as warming stripes, 1964 to 2025
Year
Annual mean temperature
Difference from the station mean
1964
10.8 C
+0.89 C
1965
10.2 C
+0.25 C
1966
9.9 C
-0.06 C
1967
8.5 C
-1.45 C
1968
9.2 C
-0.76 C
1969
8.5 C
-1.47 C
1970
9.2 C
-0.75 C
1972
9.4 C
-0.57 C
1974
10.3 C
+0.32 C
1976
9.6 C
-0.34 C
1977
10.3 C
+0.34 C
1978
9.3 C
-0.64 C
1979
9.4 C
-0.51 C
1981
10.7 C
+0.73 C
1982
9.7 C
-0.23 C
1983
10.2 C
+0.25 C
1984
9.7 C
-0.27 C
1987
11.2 C
+1.30 C
1988
10.2 C
+0.24 C
1989
8.9 C
-1.07 C
1990
10.6 C
+0.68 C
1991
10.8 C
+0.82 C
1992
9.4 C
-0.50 C
1993
9.2 C
-0.75 C
1994
9.8 C
-0.15 C
1995
9.4 C
-0.56 C
1996
8.5 C
-1.48 C
1998
11.6 C
+1.70 C
1999
10.4 C
+0.49 C
2000
9.8 C
-0.17 C
2001
10.3 C
+0.38 C
2002
10.2 C
+0.25 C
2003
9.5 C
-0.44 C
2004
9.9 C
-0.02 C
2005
10.7 C
+0.74 C
2006
10.7 C
+0.76 C
2007
10.4 C
+0.44 C
2008
8.9 C
-1.07 C
2009
9.0 C
-0.98 C
2010
10.1 C
+0.20 C
2011
10.1 C
+0.18 C
2012
11.8 C
+1.88 C
2013
9.0 C
-0.94 C
2014
7.8 C
-2.11 C
2015
9.9 C
-0.09 C
2016
11.0 C
+1.03 C
2017
10.4 C
+0.50 C
2018
9.6 C
-0.37 C
2019
9.4 C
-0.55 C
2020
10.5 C
+0.60 C
2021
10.6 C
+0.64 C
2022
9.4 C
-0.54 C
2023
11.2 C
+1.29 C
2024
11.6 C
+1.66 C
2025
10.3 C
+0.36 C
The fitted trend in annual mean temperature here over 1964 to 2025 is 0.11 C (-0.02 to 0.23) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.20 F (-0.03 to 0.42) per decade. The slope is a straight line fitted to 55 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Peru
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.11 C (-0.02 to 0.23) per decade
0.20 F (-0.03 to 0.42) per decade
1964 to 2025
55
Not clearly different from zero
Mean daily maximum
0.1 C (-0.1 to 0.2) per decade
0.1 F (-0.1 to 0.4) per decade
1964 to 2025
55
Not clearly different from zero
Mean daily minimum
0.14 C (0.01 to 0.27) per decade
0.26 F (0.02 to 0.49) per decade
1964 to 2025
55
Rise
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
1963 to 2026
Yearly extremes at Peru: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
40.0 C (104.0 F)
1983
35.6 C (96.1 F)
64
Coldest night (TNn)
-32.2 C (-26.0 F)
1985
-25.3 C (-13.5 F)
64
Wettest day (Rx1day)
114.3 mm (4.5 in)
1979
68.6 mm (2.7 in)
49
Wettest five days (Rx5day)
248.4 mm (9.8 in)
1979
98.6 mm (3.9 in)
49
Longest dry spell (CDD)
45 days
1969
21 days
49
Hottest day (TXx)
The hottest day of the year at Peru, 1963 to 2026. The record is 40.0 C (104.0 F) in 1983, marked on the chart; the median year is 35.6 C (96.1 F).
Hottest day (TXx) at Peru by year
Year
Hottest day (TXx)
1963
33.3 C (91.9 F)
1964
36.1 C (97.0 F)
1965
36.7 C (98.1 F)
1966
38.3 C (100.9 F)
1967
33.3 C (91.9 F)
1968
35.6 C (96.1 F)
1969
34.4 C (93.9 F)
1970
37.2 C (99.0 F)
1971
34.4 C (93.9 F)
1972
34.4 C (93.9 F)
1973
36.7 C (98.1 F)
1974
36.7 C (98.1 F)
1975
35.6 C (96.1 F)
1976
36.7 C (98.1 F)
1977
37.8 C (100.0 F)
1978
35.6 C (96.1 F)
1979
35.0 C (95.0 F)
1980
37.2 C (99.0 F)
1981
36.7 C (98.1 F)
1982
35.0 C (95.0 F)
1983
40.0 C (104.0 F)
1984
35.0 C (95.0 F)
1985
34.4 C (93.9 F)
1986
33.9 C (93.0 F)
1987
37.8 C (100.0 F)
1988
39.4 C (102.9 F)
1989
36.7 C (98.1 F)
1990
36.1 C (97.0 F)
1991
37.2 C (99.0 F)
1992
33.9 C (93.0 F)
1993
33.9 C (93.0 F)
1994
35.6 C (96.1 F)
1995
38.3 C (100.9 F)
1996
35.6 C (96.1 F)
1997
35.6 C (96.1 F)
1998
35.6 C (96.1 F)
1999
37.8 C (100.0 F)
2000
36.7 C (98.1 F)
2001
34.4 C (93.9 F)
2002
36.7 C (98.1 F)
2003
36.7 C (98.1 F)
2004
33.3 C (91.9 F)
2005
39.4 C (102.9 F)
2006
38.3 C (100.9 F)
2007
34.4 C (93.9 F)
2008
32.8 C (91.0 F)
2009
35.6 C (96.1 F)
2010
35.0 C (95.0 F)
2011
36.7 C (98.1 F)
2012
38.3 C (100.9 F)
2013
35.0 C (95.0 F)
2014
32.8 C (91.0 F)
2015
34.4 C (93.9 F)
2016
33.9 C (93.0 F)
2017
35.0 C (95.0 F)
2018
35.6 C (96.1 F)
2019
34.4 C (93.9 F)
2020
35.0 C (95.0 F)
2021
35.0 C (95.0 F)
2022
35.0 C (95.0 F)
2023
37.2 C (99.0 F)
2024
35.6 C (96.1 F)
2025
33.9 C (93.0 F)
2026
33.9 C (93.0 F)
Coldest night (TNn)
The coldest night of the year at Peru, 1963 to 2026. The record is -32.2 C (-26.0 F) in 1985, marked on the chart; the median year is -25.3 C (-13.5 F).
Coldest night (TNn) at Peru by year
Year
Coldest night (TNn)
1963
-27.2 C (-17.0 F)
1964
-21.1 C (-6.0 F)
1965
-23.3 C (-9.9 F)
1966
-26.1 C (-15.0 F)
1967
-25.6 C (-14.1 F)
1968
-26.1 C (-15.0 F)
1969
-25.0 C (-13.0 F)
1970
-28.3 C (-18.9 F)
1971
-23.3 C (-9.9 F)
1972
-28.3 C (-18.9 F)
1973
-25.6 C (-14.1 F)
1974
-31.1 C (-24.0 F)
1975
-25.0 C (-13.0 F)
1976
-27.8 C (-18.0 F)
1977
-31.1 C (-24.0 F)
1978
-27.8 C (-18.0 F)
1979
-30.0 C (-22.0 F)
1980
-23.9 C (-11.0 F)
1981
-25.0 C (-13.0 F)
1982
-28.9 C (-20.0 F)
1983
-28.3 C (-18.9 F)
1984
-28.9 C (-20.0 F)
1985
-32.2 C (-26.0 F)
1986
-22.8 C (-9.0 F)
1987
-21.7 C (-7.1 F)
1988
-25.6 C (-14.1 F)
1989
-29.4 C (-20.9 F)
1990
-21.1 C (-6.0 F)
1991
-21.7 C (-7.1 F)
1992
-23.9 C (-11.0 F)
1993
-21.7 C (-7.1 F)
1994
-30.0 C (-22.0 F)
1995
-20.0 C (-4.0 F)
1996
-28.9 C (-20.0 F)
1997
-25.6 C (-14.1 F)
1998
-20.0 C (-4.0 F)
1999
-30.6 C (-23.1 F)
2000
-26.1 C (-15.0 F)
2001
-20.6 C (-5.1 F)
2002
-22.2 C (-8.0 F)
2003
-20.6 C (-5.1 F)
2004
-23.9 C (-11.0 F)
2005
-21.7 C (-7.1 F)
2006
-22.2 C (-8.0 F)
2007
-23.3 C (-9.9 F)
2008
-25.0 C (-13.0 F)
2009
-30.6 C (-23.1 F)
2010
-23.9 C (-11.0 F)
2011
-23.9 C (-11.0 F)
2012
-16.1 C (3.0 F)
2013
-21.7 C (-7.1 F)
2014
-28.3 C (-18.9 F)
2015
-26.1 C (-15.0 F)
2016
-26.7 C (-16.1 F)
2017
-26.7 C (-16.1 F)
2018
-28.3 C (-18.9 F)
2019
-31.7 C (-25.1 F)
2020
-22.8 C (-9.0 F)
2021
-25.6 C (-14.1 F)
2022
-23.3 C (-9.9 F)
2023
-20.0 C (-4.0 F)
2024
-27.2 C (-17.0 F)
2025
-23.9 C (-11.0 F)
2026
-23.3 C (-9.9 F)
Wettest day (Rx1day)
The wettest day of the year at Peru, 1963 to 2026. The record is 114.3 mm (4.5 in) in 1979, marked on the chart; the median year is 68.6 mm (2.7 in).
Wettest day (Rx1day) at Peru by year
Year
Wettest day (Rx1day)
1963
39.1 mm (1.5 in)
1964
46.5 mm (1.8 in)
1965
74.9 mm (2.9 in)
1966
75.7 mm (3.0 in)
1967
58.2 mm (2.3 in)
1968
67.1 mm (2.6 in)
1969
99.6 mm (3.9 in)
1970
64.8 mm (2.6 in)
1971
42.9 mm (1.7 in)
1972
63.0 mm (2.5 in)
1973
51.1 mm (2.0 in)
1974
108.0 mm (4.3 in)
1975
77.5 mm (3.1 in)
1976
58.7 mm (2.3 in)
1977
88.4 mm (3.5 in)
1978
81.3 mm (3.2 in)
1979
114.3 mm (4.5 in)
1980
78.7 mm (3.1 in)
1981
97.8 mm (3.9 in)
1982
85.1 mm (3.4 in)
1983
78.7 mm (3.1 in)
1984
68.6 mm (2.7 in)
1985
78.7 mm (3.1 in)
1986
57.2 mm (2.3 in)
1987
74.4 mm (2.9 in)
1988
38.9 mm (1.5 in)
1989
81.8 mm (3.2 in)
1990
75.4 mm (3.0 in)
1991
57.7 mm (2.3 in)
1992
53.3 mm (2.1 in)
1993
49.5 mm (1.9 in)
1994
59.9 mm (2.4 in)
1995
52.6 mm (2.1 in)
1996
74.9 mm (2.9 in)
1997
105.4 mm (4.1 in)
1998
49.5 mm (1.9 in)
1999
72.1 mm (2.8 in)
2000
47.8 mm (1.9 in)
2001
52.3 mm (2.1 in)
2002
98.0 mm (3.9 in)
2003
47.5 mm (1.9 in)
2004
49.0 mm (1.9 in)
2005
49.0 mm (1.9 in)
2006
61.0 mm (2.4 in)
2007
107.2 mm (4.2 in)
2008
89.4 mm (3.5 in)
2009
76.7 mm (3.0 in)
2010
42.7 mm (1.7 in)
2011
89.4 mm (3.5 in)
2012
n/a
2013
n/a
2014
n/a
2015
n/a
2016
n/a
2017
n/a
2018
n/a
2019
n/a
2020
n/a
2021
n/a
2022
n/a
2023
n/a
2024
n/a
2025
n/a
2026
n/a
Wettest five days (Rx5day)
The wettest five days of the year at Peru, 1963 to 2026. The record is 248.4 mm (9.8 in) in 1979, marked on the chart; the median year is 98.6 mm (3.9 in).
Wettest five days (Rx5day) at Peru by year
Year
Wettest five days (Rx5day)
1963
67.8 mm (2.7 in)
1964
76.3 mm (3.0 in)
1965
101.4 mm (4.0 in)
1966
100.8 mm (4.0 in)
1967
78.0 mm (3.1 in)
1968
94.2 mm (3.7 in)
1969
140.5 mm (5.5 in)
1970
142.0 mm (5.6 in)
1971
53.3 mm (2.1 in)
1972
111.9 mm (4.4 in)
1973
73.7 mm (2.9 in)
1974
152.2 mm (6.0 in)
1975
89.4 mm (3.5 in)
1976
98.3 mm (3.9 in)
1977
88.4 mm (3.5 in)
1978
128.6 mm (5.1 in)
1979
248.4 mm (9.8 in)
1980
119.6 mm (4.7 in)
1981
134.1 mm (5.3 in)
1982
94.0 mm (3.7 in)
1983
136.6 mm (5.4 in)
1984
92.0 mm (3.6 in)
1985
91.0 mm (3.6 in)
1986
112.4 mm (4.4 in)
1987
124.0 mm (4.9 in)
1988
57.5 mm (2.3 in)
1989
150.1 mm (5.9 in)
1990
98.6 mm (3.9 in)
1991
101.8 mm (4.0 in)
1992
83.6 mm (3.3 in)
1993
72.4 mm (2.9 in)
1994
76.7 mm (3.0 in)
1995
86.7 mm (3.4 in)
1996
119.9 mm (4.7 in)
1997
113.0 mm (4.4 in)
1998
98.3 mm (3.9 in)
1999
100.5 mm (4.0 in)
2000
68.0 mm (2.7 in)
2001
73.4 mm (2.9 in)
2002
118.3 mm (4.7 in)
2003
99.1 mm (3.9 in)
2004
68.5 mm (2.7 in)
2005
67.7 mm (2.7 in)
2006
103.5 mm (4.1 in)
2007
219.5 mm (8.6 in)
2008
166.9 mm (6.6 in)
2009
110.2 mm (4.3 in)
2010
68.3 mm (2.7 in)
2011
71.1 mm (2.8 in)
2012
n/a
2013
n/a
2014
n/a
2015
n/a
2016
n/a
2017
n/a
2018
n/a
2019
n/a
2020
n/a
2021
n/a
2022
n/a
2023
n/a
2024
n/a
2025
n/a
2026
n/a
Longest dry spell (CDD)
The longest dry spell of the year at Peru, 1963 to 2026. The record is 45 days in 1969, marked on the chart; the median year is 21 days.
Longest dry spell (CDD) at Peru by year
Year
Longest dry spell (CDD)
1963
20 days
1964
21 days
1965
20 days
1966
26 days
1967
24 days
1968
30 days
1969
45 days
1970
15 days
1971
31 days
1972
16 days
1973
15 days
1974
21 days
1975
15 days
1976
26 days
1977
18 days
1978
19 days
1979
39 days
1980
29 days
1981
31 days
1982
19 days
1983
22 days
1984
20 days
1985
27 days
1986
29 days
1987
29 days
1988
22 days
1989
24 days
1990
20 days
1991
32 days
1992
16 days
1993
21 days
1994
22 days
1995
29 days
1996
20 days
1997
15 days
1998
19 days
1999
33 days
2000
18 days
2001
19 days
2002
24 days
2003
17 days
2004
20 days
2005
19 days
2006
19 days
2007
24 days
2008
15 days
2009
15 days
2010
21 days
2011
13 days
2012
n/a
2013
n/a
2014
n/a
2015
n/a
2016
n/a
2017
n/a
2018
n/a
2019
n/a
2020
n/a
2021
n/a
2022
n/a
2023
n/a
2024
n/a
2025
n/a
2026
n/a
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
55 years with a frost
Across 55 years with a frost, the median last spring frost at Peru falls on 26 April and the median first autumn frost on 10 October, which leaves a median of 168 days between them.
Fitted over all years, the growing season changes by +3.4 days per decade at this station.
Frost dates and growing season at Peru
Measure
Median, all years
Earliest period
Recent period (1995 to 2025)
Recent against earliest
Fitted trend
Last spring frost
26 April
n/a
23 April
n/a
-1.0 days per decade
First autumn frost
10 October
n/a
14 October
n/a
+2.4 days per decade
Growing days
168 days
n/a
175 days
n/a
+3.4 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
44 years, 1964 to 2010
A day with at least 68.1 mm (2.7 in) of rain is expected about once in 2 years. A day with at least 129.2 mm (5.1 in) of rain is expected about once in 100 years.
Rainfall return levels at Peru: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
68.1 mm (2.7 in)
5 years
86.6 mm (3.4 in)
10 years
97.9 mm (3.9 in)
25 years
111.3 mm (4.4 in)
50 years
120.5 mm (4.7 in)
Longer than the 44 years of record
100 years
129.2 mm (5.1 in)
Longer than the 44 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, 44 years of values from 1964 to 2010.
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: 114.3 mm (4.5 in) in 1979; 108.0 mm (4.3 in) in 1974; 107.2 mm (4.2 in) in 2007.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Download the Data
Data for Peru standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Peru 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.