Record envelope, standing records and threshold days for Rochelle (USC00117354), Illinois, United States, with 42 years of record.
Key Facts for Rochelle
Rochelle (USC00117354) is a weather station in Illinois, United States at 41.91 latitude and -89.07 longitude, 236 m (775 ft) above sea level.
The station reports from 1978 to 2019, 42 years of record.
1,464 records set at Rochelle still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Rochelle set a daily record snow depth of 2.5 cm (1.0 in) on 14 November 2019.
About the Station
Location: Illinois, United States, 41.91 latitude, -89.07 longitude.
Elevation: 236 m (775 ft).
Period of record: 1978 to 2019, 42 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 Rochelle. 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 Rochelle, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
16.7 C (62.1 F)
-36.1 C (-33.0 F)
n/a
n/a
Feb
20.6 C (69.1 F)
-33.9 C (-29.0 F)
n/a
n/a
Mar
28.9 C (84.0 F)
-25.6 C (-14.1 F)
n/a
n/a
Apr
32.8 C (91.0 F)
-13.3 C (8.1 F)
n/a
n/a
May
35.6 C (96.1 F)
-3.9 C (25.0 F)
n/a
n/a
Jun
38.3 C (100.9 F)
2.2 C (36.0 F)
n/a
n/a
Jul
38.3 C (100.9 F)
7.2 C (45.0 F)
n/a
n/a
Aug
37.8 C (100.0 F)
1.7 C (35.1 F)
n/a
n/a
Sep
34.4 C (93.9 F)
-4.4 C (24.1 F)
n/a
n/a
Oct
31.7 C (89.1 F)
-8.9 C (16.0 F)
n/a
n/a
Nov
25.0 C (77.0 F)
-17.2 C (1.0 F)
n/a
n/a
Dec
20.6 C (69.1 F)
-30.0 C (-22.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Rochelle still stand. 1992 holds the most, with 61.
Standing records at Rochelle by the year they were set
Year set
Standing records
1978
7
1979
55
1980
31
1981
25
1982
41
1983
55
1984
50
1985
43
1986
40
1987
38
1988
59
1989
37
1990
48
1991
57
1992
61
1993
28
1994
30
1995
25
1996
41
1997
35
1998
34
1999
41
2000
42
2001
29
2002
46
2003
22
2004
18
2005
34
2006
37
2007
26
2008
20
2009
28
2010
18
2011
17
2012
55
2013
28
2014
42
2015
34
2016
13
2017
42
2018
19
2019
13
All-Time Record Progression
1 new records
1 all-time records were set at Rochelle between 2 February 2011 and 2 February 2011. Each dot is a new record.
When Rochelle set new all-time records
Date
Kind
Detail
2011-02-02
Record daily snowfall
Record daily snowfall 33.0 cm (13.0 in)
Wettest Day of Each Month
Aug: 209.6 mm (8.3 in)
The wettest day on record for each calendar month at Rochelle. The most was 209.6 mm (8.3 in) on 13 August 1987.
Record daily precipitation for each month at Rochelle
Month
Record daily precipitation (mm)
Date
Jan
43.2 mm (1.7 in)
27 January 1997
Feb
50.3 mm (2.0 in)
21 February 1997
Mar
43.2 mm (1.7 in)
8 March 2009
Apr
97.8 mm (3.9 in)
18 April 2013
May
73.2 mm (2.9 in)
29 May 1996
Jun
87.1 mm (3.4 in)
16 June 2015
Jul
146.1 mm (5.8 in)
22 July 1982
Aug
209.6 mm (8.3 in)
13 August 1987
Sep
91.4 mm (3.6 in)
13 September 2008
Oct
81.8 mm (3.2 in)
18 October 1998
Nov
51.6 mm (2.0 in)
11 November 1995
Dec
75.7 mm (3.0 in)
3 December 1982
Period of Record Coverage
1978 to 2019
Complete yearUnder 90 percent of days
42 years of record at Rochelle, 1978 to 2019. 6 years have data for under 90 percent of days and are left out of rankings: 1978, 1982, 1985, 2017, 2018, 2019.
Cooler than the station meanWarmer than the station mean
One stripe for each of 33 complete years at Rochelle, 1980 to 2018. Blue stripes are years cooler than the station's own mean of 8.9 C (48.0 F); red stripes are warmer. The coolest year was 2014, at 6.7 C (44.1 F), and the warmest was 2012, at 10.8 C (51.4 F). The strongest colour marks a difference of 2.2 C (4.0 F).
Annual mean temperature at Rochelle as warming stripes, 1980 to 2018
Year
Annual mean temperature
Difference from the station mean
1980
8.2 C
-0.71 C
1981
8.5 C
-0.39 C
1983
8.4 C
-0.43 C
1984
8.5 C
-0.33 C
1986
9.1 C
+0.26 C
1988
9.1 C
+0.27 C
1990
9.7 C
+0.85 C
1991
9.6 C
+0.76 C
1992
8.0 C
-0.86 C
1993
8.1 C
-0.74 C
1994
8.5 C
-0.40 C
1995
8.3 C
-0.55 C
1996
7.3 C
-1.61 C
1997
8.0 C
-0.83 C
1998
10.7 C
+1.87 C
1999
9.6 C
+0.68 C
2000
8.8 C
-0.06 C
2001
9.6 C
+0.72 C
2002
9.9 C
+0.99 C
2004
9.3 C
+0.38 C
2005
9.8 C
+0.91 C
2006
9.9 C
+1.06 C
2007
9.2 C
+0.35 C
2008
7.7 C
-1.16 C
2009
8.0 C
-0.89 C
2010
9.2 C
+0.32 C
2011
9.1 C
+0.19 C
2012
10.8 C
+1.89 C
2013
7.8 C
-1.03 C
2014
6.7 C
-2.15 C
2015
8.8 C
-0.12 C
2016
10.1 C
+1.20 C
2018
8.6 C
-0.30 C
The fitted trend in annual mean temperature here over 1980 to 2018 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: 0.1 F (-0.4 to 0.7) per decade. The slope is a straight line fitted to 33 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Rochelle
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.1 C (-0.2 to 0.4) per decade
0.1 F (-0.4 to 0.7) per decade
1980 to 2018
33
Not clearly different from zero
Mean daily maximum
-0.02 C (-0.36 to 0.32) per decade
-0.04 F (-0.66 to 0.58) per decade
1980 to 2018
33
Not clearly different from zero
Mean daily minimum
0.2 C (-0.1 to 0.5) per decade
0.3 F (-0.2 to 0.9) per decade
1980 to 2018
33
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
1978 to 2019
Yearly extremes at Rochelle: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
38.3 C (100.9 F)
1988
34.4 C (93.9 F)
42
Coldest night (TNn)
-36.1 C (-33.0 F)
1985
-26.9 C (-16.5 F)
42
Wettest day (Rx1day)
209.6 mm (8.3 in)
1987
59.5 mm (2.3 in)
42
Wettest five days (Rx5day)
238.0 mm (9.4 in)
1987
91.9 mm (3.6 in)
42
Longest dry spell (CDD)
37 days
1999
21 days
42
Hottest day (TXx)
The hottest day of the year at Rochelle, 1978 to 2019. The record is 38.3 C (100.9 F) in 1988, marked on the chart; the median year is 34.4 C (93.9 F).
Hottest day (TXx) at Rochelle by year
Year
Hottest day (TXx)
1978
26.1 C (79.0 F)
1979
34.4 C (93.9 F)
1980
36.7 C (98.1 F)
1981
35.0 C (95.0 F)
1982
33.3 C (91.9 F)
1983
37.2 C (99.0 F)
1984
35.6 C (96.1 F)
1985
35.6 C (96.1 F)
1986
33.9 C (93.0 F)
1987
36.7 C (98.1 F)
1988
38.3 C (100.9 F)
1989
32.8 C (91.0 F)
1990
34.4 C (93.9 F)
1991
36.7 C (98.1 F)
1992
32.8 C (91.0 F)
1993
32.8 C (91.0 F)
1994
35.0 C (95.0 F)
1995
38.3 C (100.9 F)
1996
34.4 C (93.9 F)
1997
36.1 C (97.0 F)
1998
35.0 C (95.0 F)
1999
37.2 C (99.0 F)
2000
33.9 C (93.0 F)
2001
35.6 C (96.1 F)
2002
35.6 C (96.1 F)
2003
36.1 C (97.0 F)
2004
32.8 C (91.0 F)
2005
36.7 C (98.1 F)
2006
35.0 C (95.0 F)
2007
32.8 C (91.0 F)
2008
31.7 C (89.1 F)
2009
34.4 C (93.9 F)
2010
33.3 C (91.9 F)
2011
35.0 C (95.0 F)
2012
37.2 C (99.0 F)
2013
33.9 C (93.0 F)
2014
31.7 C (89.1 F)
2015
32.2 C (90.0 F)
2016
32.2 C (90.0 F)
2017
33.9 C (93.0 F)
2018
34.4 C (93.9 F)
2019
33.9 C (93.0 F)
Coldest night (TNn)
The coldest night of the year at Rochelle, 1978 to 2019. The record is -36.1 C (-33.0 F) in 1985, marked on the chart; the median year is -26.9 C (-16.5 F).
Coldest night (TNn) at Rochelle by year
Year
Coldest night (TNn)
1978
-26.1 C (-15.0 F)
1979
-32.2 C (-26.0 F)
1980
-23.9 C (-11.0 F)
1981
-27.8 C (-18.0 F)
1982
-31.7 C (-25.1 F)
1983
-30.0 C (-22.0 F)
1984
-31.7 C (-25.1 F)
1985
-36.1 C (-33.0 F)
1986
-26.7 C (-16.1 F)
1987
-22.2 C (-8.0 F)
1988
-28.9 C (-20.0 F)
1989
-30.0 C (-22.0 F)
1990
-22.2 C (-8.0 F)
1991
-24.4 C (-11.9 F)
1992
-23.3 C (-9.9 F)
1993
-27.8 C (-18.0 F)
1994
-31.1 C (-24.0 F)
1995
-22.2 C (-8.0 F)
1996
-30.6 C (-23.1 F)
1997
-28.3 C (-18.9 F)
1998
-20.0 C (-4.0 F)
1999
-31.1 C (-24.0 F)
2000
-30.0 C (-22.0 F)
2001
-22.8 C (-9.0 F)
2002
-25.6 C (-14.1 F)
2003
-22.2 C (-8.0 F)
2004
-25.6 C (-14.1 F)
2005
-22.2 C (-8.0 F)
2006
-23.3 C (-9.9 F)
2007
-27.8 C (-18.0 F)
2008
-26.7 C (-16.1 F)
2009
-33.3 C (-27.9 F)
2010
-25.0 C (-13.0 F)
2011
-27.8 C (-18.0 F)
2012
-17.8 C (0.0 F)
2013
-25.0 C (-13.0 F)
2014
-30.0 C (-22.0 F)
2015
-27.2 C (-17.0 F)
2016
-25.6 C (-14.1 F)
2017
-23.9 C (-11.0 F)
2018
-27.8 C (-18.0 F)
2019
-34.4 C (-29.9 F)
Wettest day (Rx1day)
The wettest day of the year at Rochelle, 1978 to 2019. The record is 209.6 mm (8.3 in) in 1987, marked on the chart; the median year is 59.5 mm (2.3 in).
Wettest day (Rx1day) at Rochelle by year
Year
Wettest day (Rx1day)
1978
19.1 mm (0.8 in)
1979
96.8 mm (3.8 in)
1980
58.4 mm (2.3 in)
1981
71.1 mm (2.8 in)
1982
146.1 mm (5.8 in)
1983
63.8 mm (2.5 in)
1984
43.2 mm (1.7 in)
1985
56.9 mm (2.2 in)
1986
53.6 mm (2.1 in)
1987
209.6 mm (8.3 in)
1988
30.2 mm (1.2 in)
1989
58.2 mm (2.3 in)
1990
51.6 mm (2.0 in)
1991
68.1 mm (2.7 in)
1992
54.9 mm (2.2 in)
1993
68.1 mm (2.7 in)
1994
65.3 mm (2.6 in)
1995
51.6 mm (2.0 in)
1996
129.8 mm (5.1 in)
1997
50.3 mm (2.0 in)
1998
81.8 mm (3.2 in)
1999
83.8 mm (3.3 in)
2000
48.3 mm (1.9 in)
2001
57.2 mm (2.3 in)
2002
63.8 mm (2.5 in)
2003
54.1 mm (2.1 in)
2004
42.2 mm (1.7 in)
2005
49.5 mm (1.9 in)
2006
40.9 mm (1.6 in)
2007
69.9 mm (2.8 in)
2008
91.4 mm (3.6 in)
2009
50.8 mm (2.0 in)
2010
72.4 mm (2.9 in)
2011
60.5 mm (2.4 in)
2012
38.6 mm (1.5 in)
2013
97.8 mm (3.9 in)
2014
55.4 mm (2.2 in)
2015
87.1 mm (3.4 in)
2016
45.5 mm (1.8 in)
2017
78.7 mm (3.1 in)
2018
86.9 mm (3.4 in)
2019
75.2 mm (3.0 in)
Wettest five days (Rx5day)
The wettest five days of the year at Rochelle, 1978 to 2019. The record is 238.0 mm (9.4 in) in 1987, marked on the chart; the median year is 91.9 mm (3.6 in).
Wettest five days (Rx5day) at Rochelle by year
Year
Wettest five days (Rx5day)
1978
38.4 mm (1.5 in)
1979
150.1 mm (5.9 in)
1980
93.5 mm (3.7 in)
1981
81.6 mm (3.2 in)
1982
149.9 mm (5.9 in)
1983
123.7 mm (4.9 in)
1984
95.2 mm (3.7 in)
1985
74.8 mm (2.9 in)
1986
92.8 mm (3.7 in)
1987
238.0 mm (9.4 in)
1988
47.8 mm (1.9 in)
1989
71.2 mm (2.8 in)
1990
61.0 mm (2.4 in)
1991
69.0 mm (2.7 in)
1992
88.8 mm (3.5 in)
1993
120.2 mm (4.7 in)
1994
90.9 mm (3.6 in)
1995
85.8 mm (3.4 in)
1996
138.8 mm (5.5 in)
1997
62.7 mm (2.5 in)
1998
96.0 mm (3.8 in)
1999
109.5 mm (4.3 in)
2000
113.1 mm (4.5 in)
2001
75.1 mm (3.0 in)
2002
110.3 mm (4.3 in)
2003
81.0 mm (3.2 in)
2004
58.9 mm (2.3 in)
2005
69.1 mm (2.7 in)
2006
88.9 mm (3.5 in)
2007
147.3 mm (5.8 in)
2008
156.1 mm (6.1 in)
2009
76.0 mm (3.0 in)
2010
86.4 mm (3.4 in)
2011
99.1 mm (3.9 in)
2012
46.5 mm (1.8 in)
2013
115.1 mm (4.5 in)
2014
125.5 mm (4.9 in)
2015
164.6 mm (6.5 in)
2016
78.0 mm (3.1 in)
2017
158.4 mm (6.2 in)
2018
160.6 mm (6.3 in)
2019
85.6 mm (3.4 in)
Longest dry spell (CDD)
The longest dry spell of the year at Rochelle, 1978 to 2019. The record is 37 days in 1999, marked on the chart; the median year is 21 days.
Longest dry spell (CDD) at Rochelle by year
Year
Longest dry spell (CDD)
1978
12 days
1979
29 days
1980
16 days
1981
31 days
1982
23 days
1983
21 days
1984
21 days
1985
17 days
1986
24 days
1987
29 days
1988
35 days
1989
27 days
1990
16 days
1991
32 days
1992
20 days
1993
21 days
1994
22 days
1995
29 days
1996
27 days
1997
15 days
1998
24 days
1999
37 days
2000
17 days
2001
19 days
2002
19 days
2003
23 days
2004
20 days
2005
24 days
2006
17 days
2007
16 days
2008
14 days
2009
25 days
2010
21 days
2011
13 days
2012
24 days
2013
17 days
2014
13 days
2015
20 days
2016
19 days
2017
16 days
2018
8 days
2019
11 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
33 years with a frost
Across 33 years with a frost, the median last spring frost at Rochelle falls on 30 April and the median first autumn frost on 7 October, which leaves a median of 161 days between them.
Fitted over all years, the growing season changes by +4.5 days per decade at this station.
Frost dates and growing season at Rochelle
Measure
Median, all years
Earliest period
Recent period (1984 to 2018)
Recent against earliest
Fitted trend
Last spring frost
30 April
n/a
29 April
n/a
+1.3 days per decade
First autumn frost
7 October
n/a
10 October
n/a
+5.8 days per decade
Growing days
161 days
n/a
162 days
n/a
+4.5 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, 1979 to 2016
A day with at least 59.1 mm (2.3 in) of rain is expected about once in 2 years. A day with at least 218.8 mm (8.6 in) of rain is expected about once in 100 years.
Rainfall return levels at Rochelle: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
59.1 mm (2.3 in)
5 years
82.8 mm (3.3 in)
10 years
104.2 mm (4.1 in)
25 years
140.1 mm (5.5 in)
50 years
175.0 mm (6.9 in)
Longer than the 36 years of record
100 years
218.8 mm (8.6 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 1979 to 2016.
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: 209.6 mm (8.3 in) in 1987; 146.1 mm (5.8 in) in 1982; 129.8 mm (5.1 in) in 1996.
Download the Data
Data for Rochelle standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Rochelle 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 2026-10-15 (15 October 2026). Records are computed by this site and are not official.