Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Bollon Mary St. The lines show the 2026 daily maximum and minimum. 8 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Bollon Mary St, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
47.0 C (116.6 F)
10.3 C (50.5 F)
46.5 C (115.7 F)
19.0 C (66.2 F)
Feb
46.5 C (115.7 F)
8.3 C (46.9 F)
43.1 C (109.6 F)
18.1 C (64.6 F)
Mar
43.2 C (109.8 F)
7.2 C (45.0 F)
38.0 C (100.4 F)
8.2 C (46.8 F)
Apr
39.0 C (102.2 F)
0.0 C (32.0 F)
39.0 C (102.2 F)
6.1 C (43.0 F)
May
33.9 C (93.0 F)
-3.3 C (26.1 F)
30.0 C (86.0 F)
9.0 C (48.2 F)
Jun
33.6 C (92.5 F)
-5.5 C (22.1 F)
28.5 C (83.3 F)
2.0 C (35.6 F)
Jul
31.1 C (88.0 F)
-4.7 C (23.5 F)
23.1 C (73.6 F)
2.1 C (35.8 F)
Aug
37.1 C (98.8 F)
-4.5 C (23.9 F)
29.0 C (84.2 F)
7.0 C (44.6 F)
Sep
39.0 C (102.2 F)
-0.6 C (30.9 F)
36.0 C (96.8 F)
n/a
Oct
42.4 C (108.3 F)
1.1 C (34.0 F)
n/a
n/a
Nov
45.6 C (114.1 F)
5.2 C (41.4 F)
n/a
n/a
Dec
45.7 C (114.3 F)
2.4 C (36.3 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Bollon Mary St still stand. 2016 holds the most, with 48.
Standing records at Bollon Mary St by the year they were set
Year set
Standing records
1957
39
1958
44
1959
12
1960
20
1961
16
1962
25
1963
20
1964
34
1965
35
1966
12
1967
12
1968
38
1969
18
1970
29
1971
13
1972
12
1973
27
1974
24
1975
25
1976
38
1977
27
1978
16
1979
20
1980
21
1981
22
1982
22
1983
31
1984
15
1985
22
1986
16
1987
12
1988
24
1989
19
1990
14
1991
15
1992
10
1993
14
1994
15
1995
22
1996
20
1997
14
1998
19
1999
15
2000
25
2001
11
2002
23
2003
18
2004
13
2005
22
2006
14
2007
14
2008
15
2009
22
2010
27
2011
14
2012
23
2013
16
2014
26
2015
23
2016
48
2017
25
2018
16
2019
30
2020
25
2021
14
2022
8
2023
9
2024
42
2025
11
2026
12
All-Time Record Progression
1 new records
1 all-time records were set at Bollon Mary St between 24 February 1955 and 24 February 1955. Each dot is a new record.
When Bollon Mary St set new all-time records
Date
Kind
Detail
1955-02-24
Record daily precipitation
Record daily precipitation 143.3 mm (5.6 in)
Wettest Day of Each Month
Feb: 143.3 mm (5.6 in)
The wettest day on record for each calendar month at Bollon Mary St. The most was 143.3 mm (5.6 in) on 24 February 1955.
Record daily precipitation for each month at Bollon Mary St
Month
Record daily precipitation (mm)
Date
Jan
102.9 mm (4.1 in)
13 January 1891
Feb
143.3 mm (5.6 in)
24 February 1955
Mar
134.1 mm (5.3 in)
12 March 1956
Apr
114.6 mm (4.5 in)
29 April 1955
May
71.1 mm (2.8 in)
21 May 1919
Jun
62.2 mm (2.4 in)
10 June 1912
Jul
50.0 mm (2.0 in)
12 July 1887
Aug
74.9 mm (2.9 in)
2 August 1939
Sep
53.8 mm (2.1 in)
16 September 1920
Oct
98.6 mm (3.9 in)
1 October 1933
Nov
136.8 mm (5.4 in)
24 November 2023
Dec
116.0 mm (4.6 in)
30 December 2009
Period of Record Coverage
1957 to 2026
Complete yearUnder 90 percent of days
70 years of record at Bollon Mary St, 1957 to 2026. 18 years have data for under 90 percent of days and are left out of rankings: 1960, 1979, 2004, 2005, 2006, 2007, 2008, 2016 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 49 complete years at Bollon Mary St, 1957 to 2025. Blue stripes are years cooler than the station's own mean of 20.7 C (69.3 F); red stripes are warmer. The coolest year was 1976, at 19.0 C (66.1 F), and the warmest was 2019, at 22.4 C (72.2 F). The strongest colour marks a difference of 1.8 C (3.2 F).
Annual mean temperature at Bollon Mary St as warming stripes, 1957 to 2025
Year
Annual mean temperature
Difference from the station mean
1957
20.1 C
-0.66 C
1958
21.1 C
+0.35 C
1959
20.3 C
-0.43 C
1961
20.5 C
-0.23 C
1963
19.9 C
-0.85 C
1964
20.1 C
-0.65 C
1965
21.0 C
+0.27 C
1967
20.7 C
-0.06 C
1968
20.4 C
-0.39 C
1969
21.0 C
+0.22 C
1970
20.0 C
-0.76 C
1971
20.0 C
-0.76 C
1972
20.8 C
+0.03 C
1973
21.4 C
+0.65 C
1974
19.5 C
-1.23 C
1975
20.6 C
-0.16 C
1976
19.0 C
-1.80 C
1977
20.3 C
-0.46 C
1978
19.7 C
-1.03 C
1980
21.9 C
+1.18 C
1981
21.3 C
+0.50 C
1982
20.9 C
+0.15 C
1983
20.7 C
-0.03 C
1984
19.8 C
-1.00 C
1986
20.9 C
+0.18 C
1987
21.1 C
+0.38 C
1988
21.2 C
+0.45 C
1989
20.6 C
-0.12 C
1990
20.9 C
+0.18 C
1991
21.3 C
+0.59 C
1992
20.7 C
-0.04 C
1993
21.6 C
+0.81 C
1994
20.2 C
-0.60 C
1995
20.8 C
+0.00 C
1996
20.5 C
-0.22 C
1997
20.8 C
+0.07 C
1998
21.0 C
+0.27 C
1999
20.3 C
-0.44 C
2000
20.5 C
-0.22 C
2001
20.8 C
+0.09 C
2002
21.6 C
+0.89 C
2009
22.0 C
+1.21 C
2010
19.8 C
-0.99 C
2011
20.6 C
-0.20 C
2012
20.4 C
-0.34 C
2014
21.9 C
+1.15 C
2015
21.7 C
+0.92 C
2019
22.4 C
+1.60 C
2025
22.1 C
+1.32 C
The annual mean temperature here has risen by 0.2 C (0.1 to 0.3) per decade over 1957 to 2025. In Fahrenheit: 0.3 F (0.1 to 0.5) per decade. The slope is a straight line fitted to 49 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Bollon Mary St
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.2 C (0.1 to 0.3) per decade
0.3 F (0.1 to 0.5) per decade
1957 to 2025
49
Rise
Mean daily maximum
0.14 C (0.01 to 0.27) per decade
0.25 F (0.01 to 0.49) per decade
1957 to 2025
49
Rise
Mean daily minimum
0.2 C (0.1 to 0.4) per decade
0.4 F (0.2 to 0.7) per decade
1957 to 2025
49
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
1886 to 2026
Yearly extremes at Bollon Mary St: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
47.0 C (116.6 F)
1973
43.6 C (110.4 F)
70
Coldest night (TNn)
-5.5 C (22.1 F)
1975
-1.8 C (28.7 F)
70
Wettest day (Rx1day)
143.3 mm (5.6 in)
1955
52.8 mm (2.1 in)
141
Wettest five days (Rx5day)
259.8 mm (10.2 in)
1956
84.6 mm (3.3 in)
141
Longest dry spell (CDD)
112 days
1965
49 days
141
Hottest day (TXx)
The hottest day of the year at Bollon Mary St, 1886 to 2026. The record is 47.0 C (116.6 F) in 1973, marked on the chart; the median year is 43.6 C (110.4 F).
Hottest day (TXx) at Bollon Mary St by year
Year
Hottest day (TXx)
1886
n/a
1887
n/a
1888
n/a
1889
n/a
1890
n/a
1891
n/a
1892
n/a
1893
n/a
1894
n/a
1895
n/a
1896
n/a
1897
n/a
1898
n/a
1899
n/a
1900
n/a
1901
n/a
1902
n/a
1903
n/a
1904
n/a
1905
n/a
1906
n/a
1907
n/a
1908
n/a
1909
n/a
1910
n/a
1911
n/a
1912
n/a
1913
n/a
1914
n/a
1915
n/a
1916
n/a
1917
n/a
1918
n/a
1919
n/a
1920
n/a
1921
n/a
1922
n/a
1923
n/a
1924
n/a
1925
n/a
1926
n/a
1927
n/a
1928
n/a
1929
n/a
1930
n/a
1931
n/a
1932
n/a
1933
n/a
1934
n/a
1935
n/a
1936
n/a
1937
n/a
1938
n/a
1939
n/a
1940
n/a
1941
n/a
1942
n/a
1943
n/a
1944
n/a
1945
n/a
1946
n/a
1947
n/a
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
43.3 C (109.9 F)
1958
42.2 C (108.0 F)
1959
40.6 C (105.1 F)
1960
42.8 C (109.0 F)
1961
42.2 C (108.0 F)
1962
41.7 C (107.1 F)
1963
44.2 C (111.6 F)
1964
44.4 C (111.9 F)
1965
44.4 C (111.9 F)
1966
43.9 C (111.0 F)
1967
45.7 C (114.3 F)
1968
44.0 C (111.2 F)
1969
44.1 C (111.4 F)
1970
41.6 C (106.9 F)
1971
42.9 C (109.2 F)
1972
44.6 C (112.3 F)
1973
47.0 C (116.6 F)
1974
41.2 C (106.2 F)
1975
43.2 C (109.8 F)
1976
42.2 C (108.0 F)
1977
42.3 C (108.1 F)
1978
42.4 C (108.3 F)
1979
46.5 C (115.7 F)
1980
45.0 C (113.0 F)
1981
44.6 C (112.3 F)
1982
45.3 C (113.5 F)
1983
44.0 C (111.2 F)
1984
41.8 C (107.2 F)
1985
44.5 C (112.1 F)
1986
43.0 C (109.4 F)
1987
44.3 C (111.7 F)
1988
43.0 C (109.4 F)
1989
42.0 C (107.6 F)
1990
45.0 C (113.0 F)
1991
43.0 C (109.4 F)
1992
42.7 C (108.9 F)
1993
42.5 C (108.5 F)
1994
45.0 C (113.0 F)
1995
42.8 C (109.0 F)
1996
43.6 C (110.5 F)
1997
43.0 C (109.4 F)
1998
42.7 C (108.9 F)
1999
41.5 C (106.7 F)
2000
42.3 C (108.1 F)
2001
44.5 C (112.1 F)
2002
43.3 C (109.9 F)
2003
44.7 C (112.5 F)
2004
46.4 C (115.5 F)
2005
43.1 C (109.6 F)
2006
44.0 C (111.2 F)
2007
41.5 C (106.7 F)
2008
42.0 C (107.6 F)
2009
44.2 C (111.6 F)
2010
40.0 C (104.0 F)
2011
43.5 C (110.3 F)
2012
43.8 C (110.8 F)
2013
46.6 C (115.9 F)
2014
43.7 C (110.7 F)
2015
43.2 C (109.8 F)
2016
44.6 C (112.3 F)
2017
46.5 C (115.7 F)
2018
44.3 C (111.7 F)
2019
45.7 C (114.3 F)
2020
45.7 C (114.3 F)
2021
41.2 C (106.2 F)
2022
41.5 C (106.7 F)
2023
41.7 C (107.1 F)
2024
44.5 C (112.1 F)
2025
44.0 C (111.2 F)
2026
46.5 C (115.7 F)
Coldest night (TNn)
The coldest night of the year at Bollon Mary St, 1886 to 2026. The record is -5.5 C (22.1 F) in 1975, marked on the chart; the median year is -1.8 C (28.7 F).
Coldest night (TNn) at Bollon Mary St by year
Year
Coldest night (TNn)
1886
n/a
1887
n/a
1888
n/a
1889
n/a
1890
n/a
1891
n/a
1892
n/a
1893
n/a
1894
n/a
1895
n/a
1896
n/a
1897
n/a
1898
n/a
1899
n/a
1900
n/a
1901
n/a
1902
n/a
1903
n/a
1904
n/a
1905
n/a
1906
n/a
1907
n/a
1908
n/a
1909
n/a
1910
n/a
1911
n/a
1912
n/a
1913
n/a
1914
n/a
1915
n/a
1916
n/a
1917
n/a
1918
n/a
1919
n/a
1920
n/a
1921
n/a
1922
n/a
1923
n/a
1924
n/a
1925
n/a
1926
n/a
1927
n/a
1928
n/a
1929
n/a
1930
n/a
1931
n/a
1932
n/a
1933
n/a
1934
n/a
1935
n/a
1936
n/a
1937
n/a
1938
n/a
1939
n/a
1940
n/a
1941
n/a
1942
n/a
1943
n/a
1944
n/a
1945
n/a
1946
n/a
1947
n/a
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
-3.3 C (26.1 F)
1958
-3.9 C (25.0 F)
1959
-3.3 C (26.1 F)
1960
-2.8 C (27.0 F)
1961
-2.8 C (27.0 F)
1962
-2.2 C (28.0 F)
1963
-4.1 C (24.6 F)
1964
-3.3 C (26.1 F)
1965
-4.4 C (24.1 F)
1966
-2.9 C (26.8 F)
1967
-2.6 C (27.3 F)
1968
-4.4 C (24.1 F)
1969
-0.6 C (30.9 F)
1970
-4.2 C (24.4 F)
1971
-4.4 C (24.1 F)
1972
-4.7 C (23.5 F)
1973
-0.3 C (31.5 F)
1974
-3.7 C (25.3 F)
1975
-5.5 C (22.1 F)
1976
-4.5 C (23.9 F)
1977
-3.8 C (25.2 F)
1978
-2.1 C (28.2 F)
1979
-1.8 C (28.8 F)
1980
-2.0 C (28.4 F)
1981
-0.3 C (31.5 F)
1982
-3.0 C (26.6 F)
1983
-0.7 C (30.7 F)
1984
-2.5 C (27.5 F)
1985
-0.8 C (30.6 F)
1986
-1.8 C (28.8 F)
1987
-1.7 C (28.9 F)
1988
-1.0 C (30.2 F)
1989
0.0 C (32.0 F)
1990
-1.0 C (30.2 F)
1991
-2.0 C (28.4 F)
1992
-2.0 C (28.4 F)
1993
-1.0 C (30.2 F)
1994
-2.6 C (27.3 F)
1995
-3.0 C (26.6 F)
1996
-0.4 C (31.3 F)
1997
-1.4 C (29.5 F)
1998
0.2 C (32.4 F)
1999
-1.1 C (30.0 F)
2000
-2.5 C (27.5 F)
2001
-0.6 C (30.9 F)
2002
-3.4 C (25.9 F)
2003
-0.5 C (31.1 F)
2004
-1.8 C (28.8 F)
2005
-1.0 C (30.2 F)
2006
-0.1 C (31.8 F)
2007
-2.5 C (27.5 F)
2008
-1.0 C (30.2 F)
2009
0.0 C (32.0 F)
2010
-1.5 C (29.3 F)
2011
-3.0 C (26.6 F)
2012
-2.0 C (28.4 F)
2013
-1.5 C (29.3 F)
2014
-2.0 C (28.4 F)
2015
-0.5 C (31.1 F)
2016
0.5 C (32.9 F)
2017
-1.9 C (28.6 F)
2018
-1.7 C (28.9 F)
2019
-1.8 C (28.8 F)
2020
0.1 C (32.2 F)
2021
-0.8 C (30.6 F)
2022
0.2 C (32.4 F)
2023
0.5 C (32.9 F)
2024
-2.0 C (28.4 F)
2025
-1.6 C (29.1 F)
2026
2.0 C (35.6 F)
Wettest day (Rx1day)
The wettest day of the year at Bollon Mary St, 1886 to 2026. The record is 143.3 mm (5.6 in) in 1955, marked on the chart; the median year is 52.8 mm (2.1 in).
Wettest day (Rx1day) at Bollon Mary St by year
Year
Wettest day (Rx1day)
1886
0.0 mm (0.00 in)
1887
81.3 mm (3.2 in)
1888
36.6 mm (1.4 in)
1889
41.9 mm (1.6 in)
1890
58.4 mm (2.3 in)
1891
102.9 mm (4.1 in)
1892
95.3 mm (3.8 in)
1893
44.5 mm (1.8 in)
1894
85.1 mm (3.4 in)
1895
91.4 mm (3.6 in)
1896
81.3 mm (3.2 in)
1897
46.2 mm (1.8 in)
1898
47.8 mm (1.9 in)
1899
38.4 mm (1.5 in)
1900
41.4 mm (1.6 in)
1901
52.6 mm (2.1 in)
1902
20.3 mm (0.8 in)
1903
52.6 mm (2.1 in)
1904
39.6 mm (1.6 in)
1905
58.9 mm (2.3 in)
1906
79.2 mm (3.1 in)
1907
57.9 mm (2.3 in)
1908
47.5 mm (1.9 in)
1909
51.3 mm (2.0 in)
1910
53.8 mm (2.1 in)
1911
75.9 mm (3.0 in)
1912
62.2 mm (2.4 in)
1913
80.5 mm (3.2 in)
1914
46.2 mm (1.8 in)
1915
42.2 mm (1.7 in)
1916
46.2 mm (1.8 in)
1917
83.6 mm (3.3 in)
1918
34.5 mm (1.4 in)
1919
71.1 mm (2.8 in)
1920
53.8 mm (2.1 in)
1921
61.7 mm (2.4 in)
1922
51.8 mm (2.0 in)
1923
45.0 mm (1.8 in)
1924
65.0 mm (2.6 in)
1925
47.5 mm (1.9 in)
1926
52.1 mm (2.1 in)
1927
67.6 mm (2.7 in)
1928
54.9 mm (2.2 in)
1929
51.6 mm (2.0 in)
1930
65.0 mm (2.6 in)
1931
97.8 mm (3.9 in)
1932
27.2 mm (1.1 in)
1933
98.6 mm (3.9 in)
1934
58.4 mm (2.3 in)
1935
21.3 mm (0.8 in)
1936
68.6 mm (2.7 in)
1937
101.6 mm (4.0 in)
1938
39.4 mm (1.6 in)
1939
74.9 mm (2.9 in)
1940
47.0 mm (1.9 in)
1941
54.9 mm (2.2 in)
1942
54.4 mm (2.1 in)
1943
41.9 mm (1.6 in)
1944
29.0 mm (1.1 in)
1945
54.1 mm (2.1 in)
1946
44.2 mm (1.7 in)
1947
37.1 mm (1.5 in)
1948
58.9 mm (2.3 in)
1949
41.1 mm (1.6 in)
1950
70.4 mm (2.8 in)
1951
55.4 mm (2.2 in)
1952
40.1 mm (1.6 in)
1953
50.3 mm (2.0 in)
1954
62.0 mm (2.4 in)
1955
143.3 mm (5.6 in)
1956
134.1 mm (5.3 in)
1957
46.5 mm (1.8 in)
1958
70.1 mm (2.8 in)
1959
52.8 mm (2.1 in)
1960
24.4 mm (1.0 in)
1961
48.8 mm (1.9 in)
1962
37.8 mm (1.5 in)
1963
82.0 mm (3.2 in)
1964
61.5 mm (2.4 in)
1965
33.8 mm (1.3 in)
1966
38.4 mm (1.5 in)
1967
62.5 mm (2.5 in)
1968
44.5 mm (1.8 in)
1969
51.3 mm (2.0 in)
1970
44.5 mm (1.8 in)
1971
44.2 mm (1.7 in)
1972
33.0 mm (1.3 in)
1973
82.3 mm (3.2 in)
1974
85.5 mm (3.4 in)
1975
59.0 mm (2.3 in)
1976
92.2 mm (3.6 in)
1977
67.6 mm (2.7 in)
1978
36.4 mm (1.4 in)
1979
34.8 mm (1.4 in)
1980
37.2 mm (1.5 in)
1981
48.4 mm (1.9 in)
1982
87.6 mm (3.4 in)
1983
52.4 mm (2.1 in)
1984
61.0 mm (2.4 in)
1985
37.0 mm (1.5 in)
1986
28.6 mm (1.1 in)
1987
54.8 mm (2.2 in)
1988
72.6 mm (2.9 in)
1989
75.0 mm (3.0 in)
1990
67.4 mm (2.7 in)
1991
62.0 mm (2.4 in)
1992
35.2 mm (1.4 in)
1993
28.0 mm (1.1 in)
1994
35.6 mm (1.4 in)
1995
69.0 mm (2.7 in)
1996
59.0 mm (2.3 in)
1997
27.4 mm (1.1 in)
1998
52.4 mm (2.1 in)
1999
127.6 mm (5.0 in)
2000
96.0 mm (3.8 in)
2001
36.2 mm (1.4 in)
2002
71.0 mm (2.8 in)
2003
25.0 mm (1.0 in)
2004
92.6 mm (3.6 in)
2005
45.2 mm (1.8 in)
2006
40.8 mm (1.6 in)
2007
49.4 mm (1.9 in)
2008
46.0 mm (1.8 in)
2009
116.0 mm (4.6 in)
2010
104.3 mm (4.1 in)
2011
56.5 mm (2.2 in)
2012
55.0 mm (2.2 in)
2013
42.6 mm (1.7 in)
2014
26.2 mm (1.0 in)
2015
34.0 mm (1.3 in)
2016
57.6 mm (2.3 in)
2017
52.0 mm (2.0 in)
2018
42.6 mm (1.7 in)
2019
28.2 mm (1.1 in)
2020
32.8 mm (1.3 in)
2021
64.8 mm (2.6 in)
2022
64.8 mm (2.6 in)
2023
136.8 mm (5.4 in)
2024
60.6 mm (2.4 in)
2025
63.6 mm (2.5 in)
2026
78.0 mm (3.1 in)
Wettest five days (Rx5day)
The wettest five days of the year at Bollon Mary St, 1886 to 2026. The record is 259.8 mm (10.2 in) in 1956, marked on the chart; the median year is 84.6 mm (3.3 in).
Wettest five days (Rx5day) at Bollon Mary St by year
Year
Wettest five days (Rx5day)
1886
0.0 mm (0.00 in)
1887
109.5 mm (4.3 in)
1888
55.9 mm (2.2 in)
1889
81.0 mm (3.2 in)
1890
171.7 mm (6.8 in)
1891
251.6 mm (9.9 in)
1892
139.4 mm (5.5 in)
1893
62.1 mm (2.4 in)
1894
105.6 mm (4.2 in)
1895
116.8 mm (4.6 in)
1896
116.8 mm (4.6 in)
1897
52.3 mm (2.1 in)
1898
70.9 mm (2.8 in)
1899
38.4 mm (1.5 in)
1900
45.0 mm (1.8 in)
1901
94.5 mm (3.7 in)
1902
39.4 mm (1.6 in)
1903
52.6 mm (2.1 in)
1904
69.8 mm (2.7 in)
1905
149.6 mm (5.9 in)
1906
110.8 mm (4.4 in)
1907
78.8 mm (3.1 in)
1908
53.8 mm (2.1 in)
1909
87.8 mm (3.5 in)
1910
78.7 mm (3.1 in)
1911
154.2 mm (6.1 in)
1912
85.6 mm (3.4 in)
1913
122.7 mm (4.8 in)
1914
94.7 mm (3.7 in)
1915
49.8 mm (2.0 in)
1916
107.4 mm (4.2 in)
1917
153.7 mm (6.1 in)
1918
54.1 mm (2.1 in)
1919
81.0 mm (3.2 in)
1920
84.6 mm (3.3 in)
1921
92.7 mm (3.6 in)
1922
58.4 mm (2.3 in)
1923
86.2 mm (3.4 in)
1924
91.9 mm (3.6 in)
1925
52.8 mm (2.1 in)
1926
153.7 mm (6.1 in)
1927
98.9 mm (3.9 in)
1928
71.9 mm (2.8 in)
1929
69.6 mm (2.7 in)
1930
98.8 mm (3.9 in)
1931
125.8 mm (5.0 in)
1932
32.3 mm (1.3 in)
1933
133.9 mm (5.3 in)
1934
65.8 mm (2.6 in)
1935
46.5 mm (1.8 in)
1936
88.7 mm (3.5 in)
1937
110.5 mm (4.4 in)
1938
55.1 mm (2.2 in)
1939
94.2 mm (3.7 in)
1940
69.9 mm (2.8 in)
1941
93.4 mm (3.7 in)
1942
104.0 mm (4.1 in)
1943
76.5 mm (3.0 in)
1944
60.3 mm (2.4 in)
1945
61.7 mm (2.4 in)
1946
80.0 mm (3.1 in)
1947
83.8 mm (3.3 in)
1948
85.1 mm (3.4 in)
1949
67.3 mm (2.6 in)
1950
111.8 mm (4.4 in)
1951
55.4 mm (2.2 in)
1952
69.1 mm (2.7 in)
1953
88.6 mm (3.5 in)
1954
85.6 mm (3.4 in)
1955
169.5 mm (6.7 in)
1956
259.8 mm (10.2 in)
1957
68.6 mm (2.7 in)
1958
71.6 mm (2.8 in)
1959
73.1 mm (2.9 in)
1960
45.5 mm (1.8 in)
1961
88.8 mm (3.5 in)
1962
106.1 mm (4.2 in)
1963
122.5 mm (4.8 in)
1964
63.0 mm (2.5 in)
1965
62.1 mm (2.4 in)
1966
61.9 mm (2.4 in)
1967
167.6 mm (6.6 in)
1968
110.8 mm (4.4 in)
1969
68.3 mm (2.7 in)
1970
51.8 mm (2.0 in)
1971
100.3 mm (3.9 in)
1972
43.7 mm (1.7 in)
1973
113.0 mm (4.4 in)
1974
145.4 mm (5.7 in)
1975
126.6 mm (5.0 in)
1976
138.4 mm (5.4 in)
1977
88.0 mm (3.5 in)
1978
70.2 mm (2.8 in)
1979
60.0 mm (2.4 in)
1980
70.4 mm (2.8 in)
1981
61.4 mm (2.4 in)
1982
137.6 mm (5.4 in)
1983
125.2 mm (4.9 in)
1984
118.6 mm (4.7 in)
1985
52.4 mm (2.1 in)
1986
52.0 mm (2.0 in)
1987
63.0 mm (2.5 in)
1988
92.4 mm (3.6 in)
1989
90.6 mm (3.6 in)
1990
117.2 mm (4.6 in)
1991
90.4 mm (3.6 in)
1992
55.2 mm (2.2 in)
1993
54.8 mm (2.2 in)
1994
58.6 mm (2.3 in)
1995
123.6 mm (4.9 in)
1996
100.0 mm (3.9 in)
1997
85.0 mm (3.3 in)
1998
114.0 mm (4.5 in)
1999
205.2 mm (8.1 in)
2000
187.0 mm (7.4 in)
2001
48.6 mm (1.9 in)
2002
82.0 mm (3.2 in)
2003
35.9 mm (1.4 in)
2004
148.7 mm (5.9 in)
2005
53.9 mm (2.1 in)
2006
61.4 mm (2.4 in)
2007
91.6 mm (3.6 in)
2008
75.2 mm (3.0 in)
2009
176.6 mm (7.0 in)
2010
247.5 mm (9.7 in)
2011
69.9 mm (2.8 in)
2012
119.0 mm (4.7 in)
2013
82.0 mm (3.2 in)
2014
45.6 mm (1.8 in)
2015
54.2 mm (2.1 in)
2016
69.6 mm (2.7 in)
2017
83.0 mm (3.3 in)
2018
63.4 mm (2.5 in)
2019
33.0 mm (1.3 in)
2020
36.6 mm (1.4 in)
2021
121.6 mm (4.8 in)
2022
100.2 mm (3.9 in)
2023
151.4 mm (6.0 in)
2024
121.4 mm (4.8 in)
2025
148.2 mm (5.8 in)
2026
78.0 mm (3.1 in)
Longest dry spell (CDD)
The longest dry spell of the year at Bollon Mary St, 1886 to 2026. The record is 112 days in 1965, marked on the chart; the median year is 49 days.
Longest dry spell (CDD) at Bollon Mary St by year
Year
Longest dry spell (CDD)
1886
31 days
1887
28 days
1888
92 days
1889
21 days
1890
32 days
1891
35 days
1892
51 days
1893
38 days
1894
35 days
1895
59 days
1896
47 days
1897
101 days
1898
78 days
1899
66 days
1900
55 days
1901
32 days
1902
72 days
1903
29 days
1904
59 days
1905
44 days
1906
34 days
1907
60 days
1908
36 days
1909
35 days
1910
58 days
1911
49 days
1912
89 days
1913
53 days
1914
50 days
1915
84 days
1916
49 days
1917
54 days
1918
71 days
1919
71 days
1920
45 days
1921
30 days
1922
53 days
1923
48 days
1924
34 days
1925
46 days
1926
42 days
1927
99 days
1928
90 days
1929
68 days
1930
36 days
1931
24 days
1932
54 days
1933
39 days
1934
47 days
1935
61 days
1936
57 days
1937
42 days
1938
56 days
1939
54 days
1940
54 days
1941
50 days
1942
49 days
1943
50 days
1944
74 days
1945
31 days
1946
104 days
1947
38 days
1948
56 days
1949
82 days
1950
39 days
1951
60 days
1952
34 days
1953
62 days
1954
55 days
1955
32 days
1956
38 days
1957
74 days
1958
29 days
1959
34 days
1960
54 days
1961
56 days
1962
39 days
1963
61 days
1964
43 days
1965
112 days
1966
50 days
1967
56 days
1968
36 days
1969
56 days
1970
62 days
1971
45 days
1972
62 days
1973
30 days
1974
36 days
1975
81 days
1976
39 days
1977
39 days
1978
38 days
1979
34 days
1980
48 days
1981
42 days
1982
53 days
1983
29 days
1984
30 days
1985
61 days
1986
55 days
1987
35 days
1988
30 days
1989
67 days
1990
36 days
1991
65 days
1992
56 days
1993
47 days
1994
54 days
1995
39 days
1996
54 days
1997
59 days
1998
62 days
1999
24 days
2000
40 days
2001
42 days
2002
82 days
2003
37 days
2004
61 days
2005
79 days
2006
59 days
2007
51 days
2008
49 days
2009
48 days
2010
42 days
2011
28 days
2012
66 days
2013
41 days
2014
36 days
2015
40 days
2016
37 days
2017
57 days
2018
67 days
2019
81 days
2020
35 days
2021
23 days
2022
27 days
2023
40 days
2024
24 days
2025
42 days
2026
43 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
42 years with a frost
Across 42 years with a frost, the median last spring frost at Bollon Mary St falls on 11 August and the median first autumn frost on 22 June, which leaves a median of 310 days between them.
Fitted over all years, the growing season changes by +4.4 days per decade at this station.
Frost dates and growing season at Bollon Mary St
Measure
Median, all years
Earliest period
Recent period (1972 to 2014)
Recent against earliest
Fitted trend
Last spring frost
11 August
n/a
10 August
n/a
-2.4 days per decade
First autumn frost
22 June
n/a
26 June
n/a
+2.0 days per decade
Growing days
310 days
n/a
316 days
n/a
+4.4 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
133 years, 1888 to 2025
A day with at least 52.8 mm (2.1 in) of rain is expected about once in 2 years. A day with at least 137.0 mm (5.4 in) of rain is expected about once in 100 years.
Rainfall return levels at Bollon Mary St: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
52.8 mm (2.1 in)
5 years
73.0 mm (2.9 in)
10 years
87.2 mm (3.4 in)
25 years
106.3 mm (4.2 in)
50 years
121.3 mm (4.8 in)
100 years
137.0 mm (5.4 in)
The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 133 years of values from 1888 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: 143.3 mm (5.6 in) in 1955; 134.1 mm (5.3 in) in 1956; 127.6 mm (5.0 in) in 1999.
Station Changes
2 suspected
2 changes were suspected in the annual mean temperature of Bollon Mary St, at 1978 and 1993. Each is measured against neighbouring stations.
Relative to 4 neighbouring stations, the station's annual mean temperature from 1978 ran 0.4 C (0.8 F) higher than in the years before (possible change).
Relative to 4 neighbouring stations, the station's annual mean temperature from 1993 ran 0.2 C (0.4 F) lower than in the years before (possible change).
Suspected changes in the annual mean temperature at Bollon Mary St, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
1978
+0.4
+0.8
possible
4
1993
-0.2
-0.4
possible
4
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.
Download the Data
Data for Bollon Mary St standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Bollon Mary St 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 2026-10-13 (13 October 2026). Records are computed by this site and are not official.