Record envelope, standing records and threshold days for Pretty Rock (USC00327311), North Dakota, United States, with 79 years of record.
Key Facts for Pretty Rock
Pretty Rock (USC00327311) is a weather station in North Dakota, United States at 46.18 latitude and -101.86 longitude, 756 m (2,480 ft) above sea level.
The station reports from 1948 to 2026, 79 years of record.
1,464 records set at Pretty Rock still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Pretty Rock set a daily record low minimum temperature of 2.2 C (36.0 F) on 5 August 2026.
About the Station
Location: North Dakota, United States, 46.18 latitude, -101.86 longitude.
Elevation: 756 m (2,480 ft).
Period of record: 1948 to 2026, 79 years.
Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
22 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 Pretty Rock. The lines show the 2026 daily maximum and minimum. 22 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Pretty Rock, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
19.4 C (66.9 F)
-41.1 C (-42.0 F)
10.6 C (51.1 F)
-34.4 C (-29.9 F)
Feb
21.7 C (71.1 F)
-41.7 C (-43.1 F)
14.4 C (57.9 F)
-22.2 C (-8.0 F)
Mar
27.8 C (82.0 F)
-35.6 C (-32.1 F)
25.0 C (77.0 F)
-25.0 C (-13.0 F)
Apr
33.9 C (93.0 F)
-21.1 C (-6.0 F)
28.9 C (84.0 F)
-11.1 C (12.0 F)
May
36.1 C (97.0 F)
-12.2 C (10.0 F)
31.7 C (89.1 F)
-8.9 C (16.0 F)
Jun
43.9 C (111.0 F)
-2.2 C (28.0 F)
32.8 C (91.0 F)
1.7 C (35.1 F)
Jul
43.9 C (111.0 F)
1.1 C (34.0 F)
41.1 C (106.0 F)
9.4 C (48.9 F)
Aug
40.0 C (104.0 F)
-1.1 C (30.0 F)
38.3 C (100.9 F)
2.2 C (36.0 F)
Sep
41.1 C (106.0 F)
-11.1 C (12.0 F)
25.6 C (78.1 F)
3.3 C (37.9 F)
Oct
34.4 C (93.9 F)
-22.2 C (-8.0 F)
n/a
n/a
Nov
26.7 C (80.1 F)
-30.6 C (-23.1 F)
n/a
n/a
Dec
20.6 C (69.1 F)
-37.8 C (-36.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Pretty Rock still stand. 1965 holds the most, with 48.
Standing records at Pretty Rock by the year they were set
Year set
Standing records
1964
13
1965
48
1966
25
1967
21
1968
24
1969
21
1970
18
1971
14
1972
21
1973
17
1974
18
1975
21
1976
11
1977
28
1978
18
1979
18
1980
28
1981
23
1982
16
1983
27
1984
22
1985
40
1986
25
1987
28
1988
46
1989
34
1990
19
1991
39
1992
41
1993
18
1994
28
1995
23
1996
34
1997
31
1998
18
1999
20
2000
24
2001
22
2002
33
2003
34
2004
25
2005
24
2006
19
2007
26
2008
11
2009
23
2010
9
2011
20
2012
32
2013
19
2014
19
2015
21
2016
14
2017
23
2018
13
2019
12
2020
22
2021
26
2022
16
2023
14
2024
25
2025
23
2026
19
All-Time Record Progression
3 new records
3 all-time records were set at Pretty Rock between 29 June 2002 and 19 February 2025. Each dot is a new record.
When Pretty Rock set new all-time records
Date
Kind
Detail
2002-06-29
Record high maximum temperature
Record high maximum temperature 43.9 C (111.0 F)
2002-07-04
Record high minimum temperature
Record high minimum temperature 26.7 C (80.1 F)
2025-02-19
Record low minimum temperature
Record low minimum temperature -41.7 C (-43.1 F)
Wettest Day of Each Month
Jun: 118.6 mm (4.7 in)
The wettest day on record for each calendar month at Pretty Rock. The most was 118.6 mm (4.7 in) on 9 June 1964.
Record daily precipitation for each month at Pretty Rock
Month
Record daily precipitation (mm)
Date
Jan
14.7 mm (0.6 in)
4 January 1997
Feb
28.4 mm (1.1 in)
26 February 2009
Mar
35.1 mm (1.4 in)
29 March 1977
Apr
47.0 mm (1.9 in)
20 April 1971
May
111.8 mm (4.4 in)
8 May 1970
Jun
118.6 mm (4.7 in)
9 June 1964
Jul
67.3 mm (2.6 in)
13 July 1979
Aug
102.9 mm (4.1 in)
12 August 1999
Sep
80.5 mm (3.2 in)
15 September 1994
Oct
112.0 mm (4.4 in)
20 October 2019
Nov
82.6 mm (3.3 in)
1 November 2000
Dec
18.3 mm (0.7 in)
26 December 2016
Period of Record Coverage
1964 to 2026
Complete yearUnder 90 percent of days
63 years of record at Pretty Rock, 1964 to 2026. 4 years have data for under 90 percent of days and are left out of rankings: 1964, 1965, 1974, 2026.
Cooler than the station meanWarmer than the station mean
One stripe for each of 59 complete years at Pretty Rock, 1966 to 2025. Blue stripes are years cooler than the station's own mean of 6.2 C (43.2 F); red stripes are warmer. The coolest year was 1996, at 4.0 C (39.2 F), and the warmest was 1987, at 8.3 C (47.0 F). The strongest colour marks a difference of 2.3 C (4.1 F).
Annual mean temperature at Pretty Rock as warming stripes, 1966 to 2025
Year
Annual mean temperature
Difference from the station mean
1966
4.7 C
-1.60 C
1967
5.8 C
-0.42 C
1968
5.5 C
-0.76 C
1969
5.1 C
-1.20 C
1970
5.1 C
-1.20 C
1971
5.2 C
-1.09 C
1972
4.6 C
-1.61 C
1973
6.8 C
+0.54 C
1975
5.0 C
-1.24 C
1976
6.5 C
+0.29 C
1977
6.0 C
-0.23 C
1978
4.0 C
-2.22 C
1979
4.8 C
-1.49 C
1980
7.1 C
+0.85 C
1981
7.8 C
+1.56 C
1982
4.7 C
-1.53 C
1983
6.2 C
-0.01 C
1984
6.3 C
+0.02 C
1985
5.1 C
-1.19 C
1986
6.8 C
+0.59 C
1987
8.3 C
+2.09 C
1988
7.5 C
+1.23 C
1989
5.9 C
-0.31 C
1990
7.4 C
+1.13 C
1991
7.6 C
+1.31 C
1992
6.7 C
+0.43 C
1993
4.7 C
-1.55 C
1994
5.6 C
-0.62 C
1995
6.0 C
-0.30 C
1996
4.0 C
-2.24 C
1997
6.2 C
-0.08 C
1998
7.4 C
+1.15 C
1999
7.6 C
+1.34 C
2000
6.6 C
+0.30 C
2001
7.2 C
+0.92 C
2002
6.8 C
+0.55 C
2003
6.5 C
+0.24 C
2004
6.8 C
+0.52 C
2005
7.4 C
+1.17 C
2006
8.2 C
+1.99 C
2007
7.4 C
+1.13 C
2008
5.9 C
-0.38 C
2009
4.6 C
-1.68 C
2010
5.2 C
-1.02 C
2011
5.5 C
-0.78 C
2012
8.1 C
+1.82 C
2013
5.4 C
-0.82 C
2014
5.0 C
-1.24 C
2015
7.6 C
+1.31 C
2016
7.9 C
+1.64 C
2017
6.9 C
+0.68 C
2018
5.8 C
-0.48 C
2019
4.3 C
-1.92 C
2020
7.0 C
+0.76 C
2021
7.7 C
+1.48 C
2022
5.7 C
-0.54 C
2023
6.7 C
+0.46 C
2024
7.8 C
+1.54 C
2025
6.9 C
+0.60 C
The annual mean temperature here has risen by 0.22 C (0.05 to 0.39) per decade over 1966 to 2025. In Fahrenheit: 0.4 F (0.1 to 0.7) per decade. The slope is a straight line fitted to 59 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Pretty Rock
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.22 C (0.05 to 0.39) per decade
0.4 F (0.1 to 0.7) per decade
1966 to 2025
59
Rise
Mean daily maximum
0.24 C (0.03 to 0.45) per decade
0.4 F (0.1 to 0.8) per decade
1966 to 2025
59
Rise
Mean daily minimum
0.2 C (0.1 to 0.3) per decade
0.4 F (0.1 to 0.6) per decade
1966 to 2025
59
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
1948 to 2026
Yearly extremes at Pretty Rock: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
43.9 C (111.0 F)
2002
38.9 C (102.0 F)
63
Coldest night (TNn)
-41.7 C (-43.1 F)
2025
-33.3 C (-27.9 F)
63
Wettest day (Rx1day)
118.6 mm (4.7 in)
1964
43.7 mm (1.7 in)
79
Wettest five days (Rx5day)
153.2 mm (6.0 in)
1964
66.8 mm (2.6 in)
79
Longest dry spell (CDD)
109 days
1952
41 days
79
Hottest day (TXx)
The hottest day of the year at Pretty Rock, 1948 to 2026. The record is 43.9 C (111.0 F) in 2002, marked on the chart; the median year is 38.9 C (102.0 F).
Hottest day (TXx) at Pretty Rock by year
Year
Hottest day (TXx)
1948
n/a
1949
n/a
1950
n/a
1951
n/a
1952
n/a
1953
n/a
1954
n/a
1955
n/a
1956
n/a
1957
n/a
1958
n/a
1959
n/a
1960
n/a
1961
n/a
1962
n/a
1963
n/a
1964
38.9 C (102.0 F)
1965
36.7 C (98.1 F)
1966
37.2 C (99.0 F)
1967
38.3 C (100.9 F)
1968
37.2 C (99.0 F)
1969
38.9 C (102.0 F)
1970
38.3 C (100.9 F)
1971
40.0 C (104.0 F)
1972
36.7 C (98.1 F)
1973
40.6 C (105.1 F)
1974
39.4 C (102.9 F)
1975
42.2 C (108.0 F)
1976
39.4 C (102.9 F)
1977
40.0 C (104.0 F)
1978
41.1 C (106.0 F)
1979
39.4 C (102.9 F)
1980
41.7 C (107.1 F)
1981
42.2 C (108.0 F)
1982
37.8 C (100.0 F)
1983
38.9 C (102.0 F)
1984
38.9 C (102.0 F)
1985
38.9 C (102.0 F)
1986
37.2 C (99.0 F)
1987
36.1 C (97.0 F)
1988
39.4 C (102.9 F)
1989
41.7 C (107.1 F)
1990
37.2 C (99.0 F)
1991
40.0 C (104.0 F)
1992
33.9 C (93.0 F)
1993
33.3 C (91.9 F)
1994
36.1 C (97.0 F)
1995
37.8 C (100.0 F)
1996
36.7 C (98.1 F)
1997
36.7 C (98.1 F)
1998
36.7 C (98.1 F)
1999
40.6 C (105.1 F)
2000
40.0 C (104.0 F)
2001
40.0 C (104.0 F)
2002
43.9 C (111.0 F)
2003
40.6 C (105.1 F)
2004
39.4 C (102.9 F)
2005
39.4 C (102.9 F)
2006
43.9 C (111.0 F)
2007
41.7 C (107.1 F)
2008
37.8 C (100.0 F)
2009
34.4 C (93.9 F)
2010
38.3 C (100.9 F)
2011
35.6 C (96.1 F)
2012
39.4 C (102.9 F)
2013
37.2 C (99.0 F)
2014
33.3 C (91.9 F)
2015
38.3 C (100.9 F)
2016
36.7 C (98.1 F)
2017
39.4 C (102.9 F)
2018
38.9 C (102.0 F)
2019
33.3 C (91.9 F)
2020
36.7 C (98.1 F)
2021
39.4 C (102.9 F)
2022
37.2 C (99.0 F)
2023
36.1 C (97.0 F)
2024
40.6 C (105.1 F)
2025
36.1 C (97.0 F)
2026
41.1 C (106.0 F)
Coldest night (TNn)
The coldest night of the year at Pretty Rock, 1948 to 2026. The record is -41.7 C (-43.1 F) in 2025, marked on the chart; the median year is -33.3 C (-27.9 F).
Coldest night (TNn) at Pretty Rock by year
Year
Coldest night (TNn)
1948
n/a
1949
n/a
1950
n/a
1951
n/a
1952
n/a
1953
n/a
1954
n/a
1955
n/a
1956
n/a
1957
n/a
1958
n/a
1959
n/a
1960
n/a
1961
n/a
1962
n/a
1963
n/a
1964
-32.8 C (-27.0 F)
1965
-27.8 C (-18.0 F)
1966
-41.1 C (-42.0 F)
1967
-35.6 C (-32.1 F)
1968
-32.8 C (-27.0 F)
1969
-30.6 C (-23.1 F)
1970
-36.7 C (-34.1 F)
1971
-32.8 C (-27.0 F)
1972
-36.1 C (-33.0 F)
1973
-29.4 C (-20.9 F)
1974
-34.4 C (-29.9 F)
1975
-28.9 C (-20.0 F)
1976
-32.2 C (-26.0 F)
1977
-35.0 C (-31.0 F)
1978
-34.4 C (-29.9 F)
1979
-31.7 C (-25.1 F)
1980
-32.2 C (-26.0 F)
1981
-29.4 C (-20.9 F)
1982
-33.9 C (-29.0 F)
1983
-36.1 C (-33.0 F)
1984
-33.9 C (-29.0 F)
1985
-31.7 C (-25.1 F)
1986
-27.8 C (-18.0 F)
1987
-24.4 C (-11.9 F)
1988
-36.7 C (-34.1 F)
1989
-37.8 C (-36.0 F)
1990
-37.8 C (-36.0 F)
1991
-28.3 C (-18.9 F)
1992
-30.6 C (-23.1 F)
1993
-33.3 C (-27.9 F)
1994
-39.4 C (-38.9 F)
1995
-31.7 C (-25.1 F)
1996
-36.7 C (-34.1 F)
1997
-31.1 C (-24.0 F)
1998
-35.6 C (-32.1 F)
1999
-31.7 C (-25.1 F)
2000
-31.7 C (-25.1 F)
2001
-29.4 C (-20.9 F)
2002
-28.3 C (-18.9 F)
2003
-32.2 C (-26.0 F)
2004
-30.6 C (-23.1 F)
2005
-35.6 C (-32.1 F)
2006
-29.4 C (-20.9 F)
2007
-33.3 C (-27.9 F)
2008
-31.7 C (-25.1 F)
2009
-38.3 C (-36.9 F)
2010
-35.6 C (-32.1 F)
2011
-31.1 C (-24.0 F)
2012
-28.3 C (-18.9 F)
2013
-36.1 C (-33.0 F)
2014
-29.4 C (-20.9 F)
2015
-28.9 C (-20.0 F)
2016
-33.9 C (-29.0 F)
2017
-33.3 C (-27.9 F)
2018
-37.2 C (-35.0 F)
2019
-35.0 C (-31.0 F)
2020
-30.6 C (-23.1 F)
2021
-38.9 C (-38.0 F)
2022
-35.0 C (-31.0 F)
2023
-33.3 C (-27.9 F)
2024
-35.6 C (-32.1 F)
2025
-41.7 C (-43.1 F)
2026
-34.4 C (-29.9 F)
Wettest day (Rx1day)
The wettest day of the year at Pretty Rock, 1948 to 2026. The record is 118.6 mm (4.7 in) in 1964, marked on the chart; the median year is 43.7 mm (1.7 in).
Wettest day (Rx1day) at Pretty Rock by year
Year
Wettest day (Rx1day)
1948
10.2 mm (0.4 in)
1949
55.9 mm (2.2 in)
1950
42.9 mm (1.7 in)
1951
38.4 mm (1.5 in)
1952
53.3 mm (2.1 in)
1953
43.7 mm (1.7 in)
1954
32.3 mm (1.3 in)
1955
41.1 mm (1.6 in)
1956
31.5 mm (1.2 in)
1957
43.2 mm (1.7 in)
1958
26.7 mm (1.1 in)
1959
19.8 mm (0.8 in)
1960
49.0 mm (1.9 in)
1961
41.4 mm (1.6 in)
1962
51.1 mm (2.0 in)
1963
32.3 mm (1.3 in)
1964
118.6 mm (4.7 in)
1965
69.9 mm (2.8 in)
1966
63.5 mm (2.5 in)
1967
34.3 mm (1.4 in)
1968
52.3 mm (2.1 in)
1969
47.0 mm (1.9 in)
1970
111.8 mm (4.4 in)
1971
47.0 mm (1.9 in)
1972
58.4 mm (2.3 in)
1973
46.5 mm (1.8 in)
1974
38.9 mm (1.5 in)
1975
37.3 mm (1.5 in)
1976
36.8 mm (1.4 in)
1977
43.2 mm (1.7 in)
1978
38.1 mm (1.5 in)
1979
67.3 mm (2.6 in)
1980
39.4 mm (1.6 in)
1981
47.2 mm (1.9 in)
1982
43.7 mm (1.7 in)
1983
34.3 mm (1.4 in)
1984
58.2 mm (2.3 in)
1985
40.9 mm (1.6 in)
1986
34.8 mm (1.4 in)
1987
51.3 mm (2.0 in)
1988
42.2 mm (1.7 in)
1989
27.9 mm (1.1 in)
1990
30.5 mm (1.2 in)
1991
27.4 mm (1.1 in)
1992
74.4 mm (2.9 in)
1993
48.3 mm (1.9 in)
1994
80.5 mm (3.2 in)
1995
31.0 mm (1.2 in)
1996
31.8 mm (1.3 in)
1997
41.9 mm (1.6 in)
1998
36.8 mm (1.4 in)
1999
102.9 mm (4.1 in)
2000
82.6 mm (3.3 in)
2001
22.9 mm (0.9 in)
2002
19.1 mm (0.8 in)
2003
50.8 mm (2.0 in)
2004
36.3 mm (1.4 in)
2005
38.1 mm (1.5 in)
2006
38.4 mm (1.5 in)
2007
92.7 mm (3.6 in)
2008
30.0 mm (1.2 in)
2009
43.9 mm (1.7 in)
2010
57.2 mm (2.3 in)
2011
47.8 mm (1.9 in)
2012
50.3 mm (2.0 in)
2013
45.7 mm (1.8 in)
2014
58.4 mm (2.3 in)
2015
50.8 mm (2.0 in)
2016
61.0 mm (2.4 in)
2017
27.9 mm (1.1 in)
2018
25.4 mm (1.0 in)
2019
112.0 mm (4.4 in)
2020
47.5 mm (1.9 in)
2021
61.0 mm (2.4 in)
2022
46.2 mm (1.8 in)
2023
63.5 mm (2.5 in)
2024
27.2 mm (1.1 in)
2025
61.7 mm (2.4 in)
2026
39.4 mm (1.6 in)
Wettest five days (Rx5day)
The wettest five days of the year at Pretty Rock, 1948 to 2026. The record is 153.2 mm (6.0 in) in 1964, marked on the chart; the median year is 66.8 mm (2.6 in).
Wettest five days (Rx5day) at Pretty Rock by year
Year
Wettest five days (Rx5day)
1948
20.1 mm (0.8 in)
1949
79.7 mm (3.1 in)
1950
44.4 mm (1.7 in)
1951
79.9 mm (3.1 in)
1952
80.5 mm (3.2 in)
1953
58.9 mm (2.3 in)
1954
52.0 mm (2.0 in)
1955
61.3 mm (2.4 in)
1956
60.0 mm (2.4 in)
1957
56.4 mm (2.2 in)
1958
37.6 mm (1.5 in)
1959
25.4 mm (1.0 in)
1960
57.4 mm (2.3 in)
1961
48.3 mm (1.9 in)
1962
71.4 mm (2.8 in)
1963
68.6 mm (2.7 in)
1964
153.2 mm (6.0 in)
1965
94.1 mm (3.7 in)
1966
68.6 mm (2.7 in)
1967
58.2 mm (2.3 in)
1968
60.7 mm (2.4 in)
1969
72.2 mm (2.8 in)
1970
130.6 mm (5.1 in)
1971
82.9 mm (3.3 in)
1972
82.1 mm (3.2 in)
1973
54.4 mm (2.1 in)
1974
38.9 mm (1.5 in)
1975
67.6 mm (2.7 in)
1976
55.1 mm (2.2 in)
1977
101.8 mm (4.0 in)
1978
50.3 mm (2.0 in)
1979
135.4 mm (5.3 in)
1980
65.6 mm (2.6 in)
1981
79.8 mm (3.1 in)
1982
78.7 mm (3.1 in)
1983
51.1 mm (2.0 in)
1984
67.3 mm (2.6 in)
1985
47.0 mm (1.9 in)
1986
71.9 mm (2.8 in)
1987
54.6 mm (2.1 in)
1988
64.3 mm (2.5 in)
1989
69.4 mm (2.7 in)
1990
36.3 mm (1.4 in)
1991
41.1 mm (1.6 in)
1992
103.9 mm (4.1 in)
1993
121.0 mm (4.8 in)
1994
83.8 mm (3.3 in)
1995
66.8 mm (2.6 in)
1996
78.0 mm (3.1 in)
1997
54.6 mm (2.1 in)
1998
60.9 mm (2.4 in)
1999
111.5 mm (4.4 in)
2000
105.7 mm (4.2 in)
2001
45.2 mm (1.8 in)
2002
21.8 mm (0.9 in)
2003
58.2 mm (2.3 in)
2004
43.1 mm (1.7 in)
2005
81.8 mm (3.2 in)
2006
46.3 mm (1.8 in)
2007
92.7 mm (3.6 in)
2008
41.9 mm (1.6 in)
2009
51.8 mm (2.0 in)
2010
67.1 mm (2.6 in)
2011
85.4 mm (3.4 in)
2012
51.6 mm (2.0 in)
2013
94.0 mm (3.7 in)
2014
70.4 mm (2.8 in)
2015
81.3 mm (3.2 in)
2016
91.7 mm (3.6 in)
2017
30.9 mm (1.2 in)
2018
26.9 mm (1.1 in)
2019
127.5 mm (5.0 in)
2020
60.2 mm (2.4 in)
2021
109.7 mm (4.3 in)
2022
57.9 mm (2.3 in)
2023
99.5 mm (3.9 in)
2024
39.5 mm (1.6 in)
2025
109.2 mm (4.3 in)
2026
90.5 mm (3.6 in)
Longest dry spell (CDD)
The longest dry spell of the year at Pretty Rock, 1948 to 2026. The record is 109 days in 1952, marked on the chart; the median year is 41 days.
Longest dry spell (CDD) at Pretty Rock by year
Year
Longest dry spell (CDD)
1948
28 days
1949
32 days
1950
27 days
1951
15 days
1952
109 days
1953
28 days
1954
65 days
1955
27 days
1956
42 days
1957
43 days
1958
43 days
1959
26 days
1960
66 days
1961
48 days
1962
31 days
1963
37 days
1964
60 days
1965
56 days
1966
30 days
1967
49 days
1968
48 days
1969
50 days
1970
42 days
1971
38 days
1972
33 days
1973
22 days
1974
32 days
1975
30 days
1976
34 days
1977
42 days
1978
36 days
1979
59 days
1980
49 days
1981
100 days
1982
26 days
1983
30 days
1984
53 days
1985
42 days
1986
44 days
1987
45 days
1988
45 days
1989
25 days
1990
42 days
1991
47 days
1992
38 days
1993
20 days
1994
25 days
1995
36 days
1996
29 days
1997
36 days
1998
49 days
1999
58 days
2000
28 days
2001
41 days
2002
33 days
2003
27 days
2004
28 days
2005
43 days
2006
69 days
2007
43 days
2008
42 days
2009
52 days
2010
30 days
2011
36 days
2012
47 days
2013
41 days
2014
29 days
2015
41 days
2016
41 days
2017
42 days
2018
28 days
2019
28 days
2020
43 days
2021
58 days
2022
30 days
2023
27 days
2024
52 days
2025
47 days
2026
58 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
59 years with a frost
Across 59 years with a frost, the median last spring frost at Pretty Rock falls on 17 May and the median first autumn frost on 19 September, which leaves a median of 122 days between them.
Fitted over all years, the growing season changes by +0.3 days per decade at this station.
Frost dates and growing season at Pretty Rock
Measure
Median, all years
Earliest period
Recent period (1996 to 2025)
Recent against earliest
Fitted trend
Last spring frost
17 May
n/a
19 May
n/a
+0.3 days per decade
First autumn frost
19 September
n/a
20 September
n/a
+0.6 days per decade
Growing days
122 days
n/a
123 days
n/a
+0.3 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
75 years, 1949 to 2025
A day with at least 43.5 mm (1.7 in) of rain is expected about once in 2 years. A day with at least 125.5 mm (4.9 in) of rain is expected about once in 100 years.
Rainfall return levels at Pretty Rock: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
43.5 mm (1.7 in)
5 years
60.5 mm (2.4 in)
10 years
73.5 mm (2.9 in)
25 years
92.2 mm (3.6 in)
50 years
108.1 mm (4.3 in)
100 years
125.5 mm (4.9 in)
Longer than the 75 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, 75 years of values from 1949 to 2025.
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: 118.6 mm (4.7 in) in 1964; 112.0 mm (4.4 in) in 2019; 111.8 mm (4.4 in) in 1970.
Station Changes
2 suspected
2 changes were suspected in the annual mean temperature of Pretty Rock, at 2001 and 2009. Each is measured against neighbouring stations.
Relative to 5 neighbouring stations, the station's annual mean temperature from 2001 ran 0.2 C (0.4 F) higher than in the years before (possible change).
Relative to 5 neighbouring stations, the station's annual mean temperature from 2009 ran 0.5 C (0.8 F) lower than in the years before (likely change).
Suspected changes in the annual mean temperature at Pretty Rock, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
2001
+0.2
+0.4
possible
5
2009
-0.5
-0.8
likely
5
Possible change at the station (a move, a new instrument or a new site); the record is kept as measured. A "likely" change has a larger test statistic than a "possible" one. Neither says why the station differs from its neighbours. How changes are found, and the largest ones.
Climate Twins
2011 to 2025 against 1961 to 1990
Over 2011 to 2025, Pretty Rock had a mean temperature of 6.6 C (43.8 F) and 439.1 mm (17.3 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Ludlow 3 SSE (United States, 125 km away), Ralph 1 N (United States, 103 km away) and Carlyle 13 NW (United States, 198 km away).
Climate twins of Pretty Rock: stations whose 1961 to 1990 climate is closest to its 2011 to 2025 climate
Twins are stations, not cities. A twin is one of the three stations at least 100 km away whose earlier climate is closest to this station's recent one, so a close match does not mean the two places look alike in other ways. A station move or a gap in a record can change that station's averages. The list describes past climate; it is not a forecast and does not say what caused any change. How twins are found, and a search for any station.
Download the Data
Data for Pretty Rock standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Pretty Rock 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.