Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Chapantongo. 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 Chapantongo, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
30.6 C (87.1 F)
-9.4 C (15.1 F)
n/a
n/a
Feb
30.0 C (86.0 F)
-8.3 C (17.1 F)
n/a
n/a
Mar
35.6 C (96.1 F)
-7.2 C (19.0 F)
n/a
n/a
Apr
37.8 C (100.0 F)
0.0 C (32.0 F)
n/a
n/a
May
36.7 C (98.1 F)
0.0 C (32.0 F)
n/a
n/a
Jun
36.7 C (98.1 F)
0.6 C (33.1 F)
n/a
n/a
Jul
30.6 C (87.1 F)
1.7 C (35.1 F)
n/a
n/a
Aug
30.6 C (87.1 F)
0.0 C (32.0 F)
n/a
n/a
Sep
32.8 C (91.0 F)
0.0 C (32.0 F)
n/a
n/a
Oct
32.8 C (91.0 F)
-4.4 C (24.1 F)
n/a
n/a
Nov
32.8 C (91.0 F)
-6.1 C (21.0 F)
n/a
n/a
Dec
30.6 C (87.1 F)
-6.1 C (21.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Chapantongo still stand. 1965 holds the most, with 177.
Standing records at Chapantongo by the year they were set
Year set
Standing records
1963
2
1964
41
1965
177
1966
92
1967
63
1968
28
1969
13
1970
22
1971
34
1972
19
1973
8
1974
11
1975
17
1976
20
1977
10
1978
102
1979
55
1980
30
1981
22
1982
18
1983
32
1984
21
1985
22
1986
28
1987
9
1988
16
1989
18
1990
24
1991
15
1992
14
1993
22
1994
11
1995
8
1996
23
1997
19
1998
10
1999
24
2000
26
2001
37
2002
19
2003
31
2004
7
2005
17
2006
22
2007
45
2008
33
2009
32
2010
33
2011
32
2012
30
All-Time Record Progression
1 new records
1 all-time records were set at Chapantongo between 1 September 2011 and 1 September 2011. Each dot is a new record.
When Chapantongo set new all-time records
Date
Kind
Detail
2011-09-01
Record daily precipitation
Record daily precipitation 119.9 mm (4.7 in)
Wettest Day of Each Month
Sep: 119.9 mm (4.7 in)
The wettest day on record for each calendar month at Chapantongo. The most was 119.9 mm (4.7 in) on 1 September 2011.
Record daily precipitation for each month at Chapantongo
Month
Record daily precipitation (mm)
Date
Jan
38.9 mm (1.5 in)
28 January 1992
Feb
39.9 mm (1.6 in)
4 February 1974
Mar
47.8 mm (1.9 in)
26 March 1971
Apr
54.9 mm (2.2 in)
28 April 2004
May
49.8 mm (2.0 in)
18 May 1989
Jun
69.9 mm (2.8 in)
19 June 2011
Jul
85.9 mm (3.4 in)
18 July 1980
Aug
71.9 mm (2.8 in)
7 August 1984
Sep
119.9 mm (4.7 in)
1 September 2011
Oct
95.8 mm (3.8 in)
21 October 1990
Nov
34.8 mm (1.4 in)
9 November 2006
Dec
15.7 mm (0.6 in)
15 December 2009
Period of Record Coverage
1963 to 2012
Complete yearUnder 90 percent of days
50 years of record at Chapantongo, 1963 to 2012. 3 years have data for under 90 percent of days and are left out of rankings: 1963, 1964, 2012.
Cooler than the station meanWarmer than the station mean
One stripe for each of 44 complete years at Chapantongo, 1965 to 2010. Blue stripes are years cooler than the station's own mean of 14.4 C (57.9 F); red stripes are warmer. The coolest year was 2001, at 13.2 C (55.8 F), and the warmest was 1965, at 16.9 C (62.3 F). The strongest colour marks a difference of 2.5 C (4.5 F).
Annual mean temperature at Chapantongo as warming stripes, 1965 to 2010
Year
Annual mean temperature
Difference from the station mean
1965
16.9 C
+2.45 C
1967
16.0 C
+1.55 C
1968
14.1 C
-0.27 C
1969
15.6 C
+1.19 C
1970
13.6 C
-0.80 C
1971
14.6 C
+0.18 C
1973
14.5 C
+0.13 C
1974
14.6 C
+0.24 C
1975
14.9 C
+0.45 C
1976
14.5 C
+0.12 C
1977
15.1 C
+0.74 C
1978
16.1 C
+1.70 C
1979
15.7 C
+1.25 C
1980
14.7 C
+0.32 C
1981
13.9 C
-0.53 C
1982
14.2 C
-0.23 C
1983
14.6 C
+0.17 C
1984
14.0 C
-0.43 C
1985
14.0 C
-0.39 C
1986
13.8 C
-0.60 C
1987
13.6 C
-0.79 C
1988
13.7 C
-0.67 C
1989
13.3 C
-1.10 C
1990
13.4 C
-1.04 C
1991
13.8 C
-0.56 C
1992
13.5 C
-0.95 C
1993
14.0 C
-0.42 C
1994
14.3 C
-0.10 C
1995
14.9 C
+0.47 C
1996
13.5 C
-0.91 C
1997
14.1 C
-0.35 C
1998
14.9 C
+0.45 C
1999
13.5 C
-0.95 C
2000
13.7 C
-0.70 C
2001
13.2 C
-1.18 C
2002
14.2 C
-0.17 C
2003
14.8 C
+0.36 C
2004
13.8 C
-0.64 C
2005
14.9 C
+0.47 C
2006
14.3 C
-0.11 C
2007
14.6 C
+0.18 C
2008
14.4 C
+0.03 C
2009
15.1 C
+0.67 C
2010
15.4 C
+0.98 C
The annual mean temperature here has fallen by 0.20 C (0.02 to 0.38) per decade over 1965 to 2010. In Fahrenheit: 0.36 F (0.03 to 0.69) per decade. The slope is a straight line fitted to 44 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Chapantongo
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
-0.20 C (-0.38 to -0.02) per decade
-0.36 F (-0.69 to -0.03) per decade
1965 to 2010
44
Fall
Mean daily maximum
-1.4 C (-1.7 to -1.1) per decade
-2.6 F (-3.1 to -2.1) per decade
1965 to 2010
44
Fall
Mean daily minimum
1.0 C (0.7 to 1.4) per decade
1.9 F (1.3 to 2.5) per decade
1965 to 2010
44
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 2012
Yearly extremes at Chapantongo: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
37.8 C (100.0 F)
1980
30.0 C (86.0 F)
50
Coldest night (TNn)
-9.4 C (15.1 F)
1985
-3.3 C (26.1 F)
50
Wettest day (Rx1day)
119.9 mm (4.7 in)
2011
49.8 mm (2.0 in)
50
Wettest five days (Rx5day)
180.4 mm (7.1 in)
2011
90.9 mm (3.6 in)
50
Longest dry spell (CDD)
125 days
1991
59 days
50
Hottest day (TXx)
The hottest day of the year at Chapantongo, 1963 to 2012. The record is 37.8 C (100.0 F) in 1980, marked on the chart; the median year is 30.0 C (86.0 F).
Hottest day (TXx) at Chapantongo by year
Year
Hottest day (TXx)
1963
26.7 C (80.1 F)
1964
32.8 C (91.0 F)
1965
36.7 C (98.1 F)
1966
36.7 C (98.1 F)
1967
35.6 C (96.1 F)
1968
29.4 C (84.9 F)
1969
35.6 C (96.1 F)
1970
33.9 C (93.0 F)
1971
31.7 C (89.1 F)
1972
31.7 C (89.1 F)
1973
31.7 C (89.1 F)
1974
30.6 C (87.1 F)
1975
35.0 C (95.0 F)
1976
30.6 C (87.1 F)
1977
31.7 C (89.1 F)
1978
32.8 C (91.0 F)
1979
32.8 C (91.0 F)
1980
37.8 C (100.0 F)
1981
30.6 C (87.1 F)
1982
30.6 C (87.1 F)
1983
33.9 C (93.0 F)
1984
33.9 C (93.0 F)
1985
30.0 C (86.0 F)
1986
31.7 C (89.1 F)
1987
28.9 C (84.0 F)
1988
28.9 C (84.0 F)
1989
28.9 C (84.0 F)
1990
28.9 C (84.0 F)
1991
28.9 C (84.0 F)
1992
25.6 C (78.1 F)
1993
27.8 C (82.0 F)
1994
28.9 C (84.0 F)
1995
28.9 C (84.0 F)
1996
27.8 C (82.0 F)
1997
27.8 C (82.0 F)
1998
30.6 C (87.1 F)
1999
28.9 C (84.0 F)
2000
28.9 C (84.0 F)
2001
30.0 C (86.0 F)
2002
30.0 C (86.0 F)
2003
30.0 C (86.0 F)
2004
26.7 C (80.1 F)
2005
28.9 C (84.0 F)
2006
26.7 C (80.1 F)
2007
26.7 C (80.1 F)
2008
27.8 C (82.0 F)
2009
26.7 C (80.1 F)
2010
28.9 C (84.0 F)
2011
27.8 C (82.0 F)
2012
28.9 C (84.0 F)
Coldest night (TNn)
The coldest night of the year at Chapantongo, 1963 to 2012. The record is -9.4 C (15.1 F) in 1985, marked on the chart; the median year is -3.3 C (26.1 F).
Coldest night (TNn) at Chapantongo by year
Year
Coldest night (TNn)
1963
-2.2 C (28.0 F)
1964
0.0 C (32.0 F)
1965
0.0 C (32.0 F)
1966
-4.4 C (24.1 F)
1967
-7.2 C (19.0 F)
1968
0.0 C (32.0 F)
1969
0.0 C (32.0 F)
1970
-4.4 C (24.1 F)
1971
0.0 C (32.0 F)
1972
0.0 C (32.0 F)
1973
-1.1 C (30.0 F)
1974
-3.3 C (26.1 F)
1975
-5.0 C (23.0 F)
1976
-8.3 C (17.1 F)
1977
0.0 C (32.0 F)
1978
-4.4 C (24.1 F)
1979
0.0 C (32.0 F)
1980
-5.0 C (23.0 F)
1981
-4.4 C (24.1 F)
1982
-4.4 C (24.1 F)
1983
-4.4 C (24.1 F)
1984
-5.0 C (23.0 F)
1985
-9.4 C (15.1 F)
1986
-8.3 C (17.1 F)
1987
-3.3 C (26.1 F)
1988
-6.1 C (21.0 F)
1989
-3.3 C (26.1 F)
1990
-0.6 C (30.9 F)
1991
-3.3 C (26.1 F)
1992
-4.4 C (24.1 F)
1993
0.0 C (32.0 F)
1994
-1.1 C (30.0 F)
1995
0.0 C (32.0 F)
1996
-3.3 C (26.1 F)
1997
-6.1 C (21.0 F)
1998
-1.1 C (30.0 F)
1999
-6.1 C (21.0 F)
2000
-5.0 C (23.0 F)
2001
-4.4 C (24.1 F)
2002
-3.3 C (26.1 F)
2003
-5.0 C (23.0 F)
2004
-2.2 C (28.0 F)
2005
0.0 C (32.0 F)
2006
-3.3 C (26.1 F)
2007
3.9 C (39.0 F)
2008
3.9 C (39.0 F)
2009
1.7 C (35.1 F)
2010
-3.3 C (26.1 F)
2011
-2.2 C (28.0 F)
2012
0.0 C (32.0 F)
Wettest day (Rx1day)
The wettest day of the year at Chapantongo, 1963 to 2012. The record is 119.9 mm (4.7 in) in 2011, marked on the chart; the median year is 49.8 mm (2.0 in).
Wettest day (Rx1day) at Chapantongo by year
Year
Wettest day (Rx1day)
1963
8.9 mm (0.35 in)
1964
19.8 mm (0.8 in)
1965
40.9 mm (1.6 in)
1966
31.0 mm (1.2 in)
1967
53.8 mm (2.1 in)
1968
47.0 mm (1.9 in)
1969
63.8 mm (2.5 in)
1970
59.9 mm (2.4 in)
1971
47.8 mm (1.9 in)
1972
45.0 mm (1.8 in)
1973
59.9 mm (2.4 in)
1974
56.9 mm (2.2 in)
1975
74.9 mm (2.9 in)
1976
63.0 mm (2.5 in)
1977
34.8 mm (1.4 in)
1978
41.9 mm (1.6 in)
1979
49.8 mm (2.0 in)
1980
85.9 mm (3.4 in)
1981
46.0 mm (1.8 in)
1982
61.0 mm (2.4 in)
1983
30.0 mm (1.2 in)
1984
71.9 mm (2.8 in)
1985
52.8 mm (2.1 in)
1986
29.0 mm (1.1 in)
1987
62.0 mm (2.4 in)
1988
47.8 mm (1.9 in)
1989
49.8 mm (2.0 in)
1990
95.8 mm (3.8 in)
1991
52.8 mm (2.1 in)
1992
46.5 mm (1.8 in)
1993
40.9 mm (1.6 in)
1994
45.5 mm (1.8 in)
1995
32.8 mm (1.3 in)
1996
81.8 mm (3.2 in)
1997
36.8 mm (1.4 in)
1998
40.9 mm (1.6 in)
1999
59.9 mm (2.4 in)
2000
69.9 mm (2.8 in)
2001
30.0 mm (1.2 in)
2002
46.0 mm (1.8 in)
2003
87.9 mm (3.5 in)
2004
54.9 mm (2.2 in)
2005
36.8 mm (1.4 in)
2006
47.5 mm (1.9 in)
2007
53.3 mm (2.1 in)
2008
60.5 mm (2.4 in)
2009
59.9 mm (2.4 in)
2010
49.8 mm (2.0 in)
2011
119.9 mm (4.7 in)
2012
15.7 mm (0.6 in)
Wettest five days (Rx5day)
The wettest five days of the year at Chapantongo, 1963 to 2012. The record is 180.4 mm (7.1 in) in 2011, marked on the chart; the median year is 90.9 mm (3.6 in).
Wettest five days (Rx5day) at Chapantongo by year
Year
Wettest five days (Rx5day)
1963
13.5 mm (0.5 in)
1964
36.1 mm (1.4 in)
1965
117.3 mm (4.6 in)
1966
63.6 mm (2.5 in)
1967
83.8 mm (3.3 in)
1968
114.1 mm (4.5 in)
1969
143.2 mm (5.6 in)
1970
124.4 mm (4.9 in)
1971
149.7 mm (5.9 in)
1972
144.3 mm (5.7 in)
1973
154.5 mm (6.1 in)
1974
101.9 mm (4.0 in)
1975
151.8 mm (6.0 in)
1976
123.5 mm (4.9 in)
1977
110.3 mm (4.3 in)
1978
66.5 mm (2.6 in)
1979
86.2 mm (3.4 in)
1980
112.3 mm (4.4 in)
1981
97.4 mm (3.8 in)
1982
138.5 mm (5.5 in)
1983
68.9 mm (2.7 in)
1984
94.8 mm (3.7 in)
1985
163.3 mm (6.4 in)
1986
65.7 mm (2.6 in)
1987
62.0 mm (2.4 in)
1988
80.8 mm (3.2 in)
1989
95.0 mm (3.7 in)
1990
103.0 mm (4.1 in)
1991
120.1 mm (4.7 in)
1992
64.6 mm (2.5 in)
1993
72.1 mm (2.8 in)
1994
68.4 mm (2.7 in)
1995
53.2 mm (2.1 in)
1996
91.5 mm (3.6 in)
1997
65.2 mm (2.6 in)
1998
98.6 mm (3.9 in)
1999
82.5 mm (3.2 in)
2000
90.3 mm (3.6 in)
2001
49.8 mm (2.0 in)
2002
76.2 mm (3.0 in)
2003
120.0 mm (4.7 in)
2004
83.4 mm (3.3 in)
2005
78.7 mm (3.1 in)
2006
60.2 mm (2.4 in)
2007
103.9 mm (4.1 in)
2008
105.2 mm (4.1 in)
2009
74.4 mm (2.9 in)
2010
80.5 mm (3.2 in)
2011
180.4 mm (7.1 in)
2012
15.7 mm (0.6 in)
Longest dry spell (CDD)
The longest dry spell of the year at Chapantongo, 1963 to 2012. The record is 125 days in 1991, marked on the chart; the median year is 59 days.
Longest dry spell (CDD) at Chapantongo by year
Year
Longest dry spell (CDD)
1963
25 days
1964
44 days
1965
47 days
1966
73 days
1967
65 days
1968
62 days
1969
82 days
1970
57 days
1971
64 days
1972
58 days
1973
53 days
1974
22 days
1975
100 days
1976
79 days
1977
62 days
1978
29 days
1979
45 days
1980
37 days
1981
33 days
1982
56 days
1983
65 days
1984
47 days
1985
52 days
1986
56 days
1987
103 days
1988
106 days
1989
58 days
1990
37 days
1991
125 days
1992
46 days
1993
47 days
1994
70 days
1995
46 days
1996
119 days
1997
75 days
1998
114 days
1999
105 days
2000
69 days
2001
56 days
2002
56 days
2003
83 days
2004
60 days
2005
68 days
2006
56 days
2007
39 days
2008
119 days
2009
69 days
2010
64 days
2011
104 days
2012
48 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
32 years with a frost
Across 32 years with a frost, the median last spring frost at Chapantongo falls on 25 February and the median first autumn frost on 8 November, which leaves a median of 258 days between them.
Fitted over all years, the growing season changes by +5.5 days per decade at this station.
Frost dates and growing season at Chapantongo
Measure
Median, all years
Earliest period
Recent period (1969 to 2004)
Recent against earliest
Fitted trend
Last spring frost
25 February
n/a
25 February
n/a
-2.6 days per decade
First autumn frost
8 November
n/a
8 November
n/a
+2.8 days per decade
Growing days
258 days
n/a
256 days
n/a
+5.5 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
47 years, 1965 to 2011
A day with at least 50.8 mm (2.0 in) of rain is expected about once in 2 years. A day with at least 116.3 mm (4.6 in) of rain is expected about once in 100 years.
Rainfall return levels at Chapantongo: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
50.8 mm (2.0 in)
5 years
66.8 mm (2.6 in)
10 years
78.0 mm (3.1 in)
25 years
92.8 mm (3.7 in)
50 years
104.3 mm (4.1 in)
Longer than the 47 years of record
100 years
116.3 mm (4.6 in)
Longer than the 47 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, 47 years of values from 1965 to 2011.
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: 119.9 mm (4.7 in) in 2011; 95.8 mm (3.8 in) in 1990; 87.9 mm (3.5 in) in 2003.
Download the Data
Data for Chapantongo standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Chapantongo 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 2026-10-17 (17 October 2026). Records are computed by this site and are not official.