Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Richmond Raaf. 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 Richmond Raaf, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
47.4 C (117.3 F)
8.6 C (47.5 F)
n/a
n/a
Feb
43.7 C (110.7 F)
9.5 C (49.1 F)
n/a
n/a
Mar
40.5 C (104.9 F)
6.0 C (42.8 F)
n/a
n/a
Apr
38.2 C (100.8 F)
-0.4 C (31.3 F)
n/a
n/a
May
30.0 C (86.0 F)
-2.4 C (27.7 F)
n/a
n/a
Jun
26.6 C (79.9 F)
-6.4 C (20.5 F)
n/a
n/a
Jul
27.6 C (81.7 F)
-8.3 C (17.1 F)
n/a
n/a
Aug
32.8 C (91.0 F)
-4.0 C (24.8 F)
n/a
n/a
Sep
36.0 C (96.8 F)
-1.4 C (29.5 F)
n/a
n/a
Oct
40.4 C (104.7 F)
2.0 C (35.6 F)
n/a
n/a
Nov
43.6 C (110.5 F)
5.3 C (41.5 F)
n/a
n/a
Dec
43.8 C (110.8 F)
6.1 C (43.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Richmond Raaf still stand. 1944 holds the most, with 39.
Standing records at Richmond Raaf by the year they were set
Year set
Standing records
1939
4
1940
28
1941
5
1942
15
1943
22
1944
39
1945
24
1946
14
1953
18
1954
14
1955
14
1956
24
1957
31
1958
29
1959
27
1960
19
1961
13
1962
18
1963
23
1964
22
1965
38
1966
20
1967
25
1968
18
1969
23
1970
39
1971
19
1972
25
1973
29
1974
17
1975
24
1976
17
1977
15
1978
20
1979
21
1980
28
1981
23
1982
18
1983
27
1984
20
1985
13
1986
27
1987
22
1988
32
1989
14
1990
26
1991
27
1992
16
1993
19
1994
18
1997
9
1998
13
1999
1
2000
18
2001
13
2002
20
2003
16
2004
20
2005
18
2006
26
2007
14
2008
19
2009
21
2010
12
2011
13
2012
17
2013
14
2014
14
2015
3
2016
6
2017
11
2018
12
2019
4
2020
6
2021
13
2022
5
2023
23
2024
15
2025
5
All-Time Record Progression
4 new records
4 all-time records were set at Richmond Raaf between 18 January 2003 and 22 May 2025. Each dot is a new record.
When Richmond Raaf set new all-time records
Date
Kind
Detail
2003-01-18
Record high maximum temperature
Record high maximum temperature 44.3 C (111.7 F)
2003-01-30
Record high maximum temperature
Record high maximum temperature 44.6 C (112.3 F)
2020-01-04
Record high maximum temperature
Record high maximum temperature 47.4 C (117.3 F)
2025-05-22
Record daily precipitation
Record daily precipitation 181.4 mm (7.1 in)
Wettest Day of Each Month
May: 181.4 mm (7.1 in)
The wettest day on record for each calendar month at Richmond Raaf. The most was 181.4 mm (7.1 in) on 22 May 2025.
Record daily precipitation for each month at Richmond Raaf
Month
Record daily precipitation (mm)
Date
Jan
118.1 mm (4.6 in)
16 January 1963
Feb
172.2 mm (6.8 in)
10 February 1956
Mar
163.8 mm (6.4 in)
28 March 1942
Apr
163.1 mm (6.4 in)
16 April 1946
May
181.4 mm (7.1 in)
22 May 2025
Jun
107.7 mm (4.2 in)
10 June 1964
Jul
88.9 mm (3.5 in)
4 July 2022
Aug
136.6 mm (5.4 in)
2 August 1990
Sep
97.8 mm (3.9 in)
2 September 1970
Oct
82.8 mm (3.3 in)
28 October 1954
Nov
104.4 mm (4.1 in)
18 November 1961
Dec
77.2 mm (3.0 in)
12 December 1991
Period of Record Coverage
1939 to 2025
Complete yearUnder 90 percent of days
75 years of record at Richmond Raaf, 1939 to 2025. 14 years have data for under 90 percent of days and are left out of rankings: 1939, 1940, 1946, 1953, 1994, 1997, 1998, 2015 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 41 complete years at Richmond Raaf, 1943 to 1993. Blue stripes are years cooler than the station's own mean of 17.4 C (63.4 F); red stripes are warmer. The coolest year was 1971, at 16.6 C (61.9 F), and the warmest was 1980, at 18.4 C (65.1 F). The strongest colour marks a difference of 1.0 C (1.8 F).
Annual mean temperature at Richmond Raaf as warming stripes, 1943 to 1993
Year
Annual mean temperature
Difference from the station mean
1943
16.9 C
-0.50 C
1944
17.4 C
-0.01 C
1945
17.3 C
-0.09 C
1954
17.2 C
-0.20 C
1955
17.5 C
+0.06 C
1956
17.2 C
-0.18 C
1959
17.7 C
+0.27 C
1960
17.1 C
-0.28 C
1961
17.4 C
-0.07 C
1962
17.2 C
-0.26 C
1963
17.5 C
+0.06 C
1964
17.5 C
+0.05 C
1965
17.6 C
+0.18 C
1966
17.1 C
-0.30 C
1967
17.4 C
+0.01 C
1968
17.8 C
+0.42 C
1969
17.5 C
+0.03 C
1970
16.6 C
-0.78 C
1971
16.6 C
-0.79 C
1972
17.0 C
-0.44 C
1973
17.8 C
+0.34 C
1974
17.1 C
-0.28 C
1975
17.7 C
+0.23 C
1976
17.0 C
-0.44 C
1977
17.7 C
+0.31 C
1978
17.3 C
-0.16 C
1979
18.0 C
+0.58 C
1980
18.4 C
+0.97 C
1981
17.7 C
+0.26 C
1982
17.3 C
-0.10 C
1983
17.8 C
+0.35 C
1984
17.0 C
-0.44 C
1985
17.4 C
-0.01 C
1986
17.1 C
-0.29 C
1987
17.6 C
+0.15 C
1988
18.0 C
+0.53 C
1989
17.4 C
-0.02 C
1990
17.7 C
+0.31 C
1991
18.3 C
+0.87 C
1992
17.0 C
-0.46 C
1993
17.6 C
+0.20 C
The fitted trend in annual mean temperature here over 1943 to 1993 is 0.08 C (-0.01 to 0.17) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.15 F (-0.01 to 0.31) per decade. The slope is a straight line fitted to 41 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Richmond Raaf
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.08 C (-0.01 to 0.17) per decade
0.15 F (-0.01 to 0.31) per decade
1943 to 1993
41
Not clearly different from zero
Mean daily maximum
0.1 C (-0.1 to 0.2) per decade
0.2 F (-0.1 to 0.4) per decade
1943 to 1993
41
Not clearly different from zero
Mean daily minimum
0.08 C (-0.04 to 0.20) per decade
0.1 F (-0.1 to 0.4) per decade
1943 to 1993
41
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
1928 to 2025
Yearly extremes at Richmond Raaf: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
47.4 C (117.3 F)
2020
41.1 C (106.0 F)
75
Coldest night (TNn)
-8.3 C (17.1 F)
1970
-2.5 C (27.5 F)
79
Wettest day (Rx1day)
181.4 mm (7.1 in)
2025
71.9 mm (2.8 in)
90
Wettest five days (Rx5day)
319.2 mm (12.6 in)
1990
123.3 mm (4.9 in)
90
Longest dry spell (CDD)
71 days
2017
27 days
90
Hottest day (TXx)
The hottest day of the year at Richmond Raaf, 1928 to 2025. The record is 47.4 C (117.3 F) in 2020, marked on the chart; the median year is 41.1 C (106.0 F).
Hottest day (TXx) at Richmond Raaf by year
Year
Hottest day (TXx)
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
41.1 C (106.0 F)
1940
43.3 C (109.9 F)
1941
n/a
1942
n/a
1943
41.2 C (106.2 F)
1944
42.7 C (108.9 F)
1945
43.7 C (110.7 F)
1946
41.8 C (107.2 F)
1953
42.2 C (108.0 F)
1954
37.3 C (99.1 F)
1955
40.9 C (105.6 F)
1956
41.1 C (106.0 F)
1957
43.3 C (109.9 F)
1958
38.9 C (102.0 F)
1959
37.0 C (98.6 F)
1960
41.3 C (106.3 F)
1961
41.6 C (106.9 F)
1962
38.1 C (100.6 F)
1963
38.7 C (101.7 F)
1964
43.9 C (111.0 F)
1965
42.9 C (109.2 F)
1966
41.4 C (106.5 F)
1967
40.6 C (105.1 F)
1968
41.8 C (107.2 F)
1969
40.6 C (105.1 F)
1970
37.1 C (98.8 F)
1971
39.6 C (103.3 F)
1972
41.4 C (106.5 F)
1973
39.9 C (103.8 F)
1974
38.3 C (100.9 F)
1975
41.1 C (106.0 F)
1976
40.5 C (104.9 F)
1977
43.7 C (110.7 F)
1978
40.5 C (104.9 F)
1979
44.1 C (111.4 F)
1980
43.4 C (110.1 F)
1981
41.4 C (106.5 F)
1982
43.6 C (110.5 F)
1983
42.5 C (108.5 F)
1984
40.6 C (105.1 F)
1985
41.3 C (106.3 F)
1986
40.2 C (104.4 F)
1987
41.5 C (106.7 F)
1988
40.4 C (104.7 F)
1989
39.5 C (103.1 F)
1990
43.6 C (110.5 F)
1991
41.6 C (106.9 F)
1992
41.0 C (105.8 F)
1993
41.0 C (105.8 F)
1994
41.6 C (106.9 F)
1997
39.9 C (103.8 F)
1998
42.1 C (107.8 F)
1999
38.1 C (100.6 F)
2000
41.0 C (105.8 F)
2001
41.1 C (106.0 F)
2002
42.1 C (107.8 F)
2003
44.6 C (112.3 F)
2004
41.0 C (105.8 F)
2005
43.5 C (110.3 F)
2006
43.8 C (110.8 F)
2007
40.9 C (105.6 F)
2008
37.7 C (99.9 F)
2009
42.1 C (107.8 F)
2010
41.5 C (106.7 F)
2011
40.0 C (104.0 F)
2012
38.8 C (101.8 F)
2013
41.9 C (107.4 F)
2014
40.9 C (105.6 F)
2015
36.9 C (98.4 F)
2016
n/a
2017
32.8 C (91.0 F)
2018
34.0 C (93.2 F)
2019
n/a
2020
47.4 C (117.3 F)
2021
36.1 C (97.0 F)
2022
35.7 C (96.3 F)
2023
43.8 C (110.8 F)
2024
41.7 C (107.1 F)
2025
39.2 C (102.6 F)
Coldest night (TNn)
The coldest night of the year at Richmond Raaf, 1928 to 2025. The record is -8.3 C (17.1 F) in 1970, marked on the chart; the median year is -2.5 C (27.5 F).
Coldest night (TNn) at Richmond Raaf by year
Year
Coldest night (TNn)
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
6.1 C (43.0 F)
1940
-2.2 C (28.0 F)
1941
-3.6 C (25.5 F)
1942
-2.5 C (27.5 F)
1943
-3.4 C (25.9 F)
1944
-2.9 C (26.8 F)
1945
-2.9 C (26.8 F)
1946
0.0 C (32.0 F)
1953
-1.8 C (28.8 F)
1954
-1.8 C (28.8 F)
1955
-3.0 C (26.6 F)
1956
-1.1 C (30.0 F)
1957
-3.3 C (26.1 F)
1958
-1.7 C (28.9 F)
1959
-2.8 C (27.0 F)
1960
-2.2 C (28.0 F)
1961
-2.2 C (28.0 F)
1962
-1.8 C (28.8 F)
1963
-0.6 C (30.9 F)
1964
-1.7 C (28.9 F)
1965
-1.3 C (29.7 F)
1966
-2.8 C (27.0 F)
1967
-0.6 C (30.9 F)
1968
-4.1 C (24.6 F)
1969
-2.7 C (27.1 F)
1970
-8.3 C (17.1 F)
1971
-4.8 C (23.4 F)
1972
-2.3 C (27.9 F)
1973
-2.7 C (27.1 F)
1974
-2.8 C (27.0 F)
1975
-0.4 C (31.3 F)
1976
-1.6 C (29.1 F)
1977
-2.5 C (27.5 F)
1978
-3.4 C (25.9 F)
1979
-2.0 C (28.4 F)
1980
-2.6 C (27.3 F)
1981
-2.2 C (28.0 F)
1982
-3.0 C (26.6 F)
1983
-2.5 C (27.5 F)
1984
-0.6 C (30.9 F)
1985
-2.3 C (27.9 F)
1986
-5.8 C (21.6 F)
1987
-3.6 C (25.5 F)
1988
-1.0 C (30.2 F)
1989
-1.6 C (29.1 F)
1990
-1.7 C (28.9 F)
1991
-1.0 C (30.2 F)
1992
-2.3 C (27.9 F)
1993
-2.6 C (27.3 F)
1994
-2.5 C (27.5 F)
1997
1.3 C (34.3 F)
1998
10.3 C (50.5 F)
1999
8.7 C (47.7 F)
2000
-3.9 C (25.0 F)
2001
-2.7 C (27.1 F)
2002
-5.2 C (22.6 F)
2003
-3.8 C (25.2 F)
2004
-3.4 C (25.9 F)
2005
-4.0 C (24.8 F)
2006
-3.3 C (26.1 F)
2007
-3.4 C (25.9 F)
2008
-2.9 C (26.8 F)
2009
-2.4 C (27.7 F)
2010
-4.8 C (23.4 F)
2011
-3.1 C (26.4 F)
2012
-2.4 C (27.7 F)
2013
-0.8 C (30.6 F)
2014
-3.3 C (26.1 F)
2015
-2.5 C (27.5 F)
2016
-2.1 C (28.2 F)
2017
-2.1 C (28.2 F)
2018
-4.3 C (24.3 F)
2019
-3.3 C (26.1 F)
2020
-0.9 C (30.4 F)
2021
-2.7 C (27.1 F)
2022
-1.0 C (30.2 F)
2023
-6.4 C (20.5 F)
2024
-0.6 C (30.9 F)
2025
-1.3 C (29.7 F)
Wettest day (Rx1day)
The wettest day of the year at Richmond Raaf, 1928 to 2025. The record is 181.4 mm (7.1 in) in 2025, marked on the chart; the median year is 71.9 mm (2.8 in).
Wettest day (Rx1day) at Richmond Raaf by year
Year
Wettest day (Rx1day)
1928
19.1 mm (0.8 in)
1929
101.1 mm (4.0 in)
1930
60.2 mm (2.4 in)
1931
88.9 mm (3.5 in)
1932
70.4 mm (2.8 in)
1933
76.2 mm (3.0 in)
1934
55.1 mm (2.2 in)
1935
76.2 mm (3.0 in)
1936
50.8 mm (2.0 in)
1937
69.9 mm (2.8 in)
1938
76.2 mm (3.0 in)
1939
38.9 mm (1.5 in)
1940
54.6 mm (2.1 in)
1941
30.0 mm (1.2 in)
1942
163.8 mm (6.4 in)
1943
102.6 mm (4.0 in)
1944
24.1 mm (0.9 in)
1945
77.7 mm (3.1 in)
1946
163.1 mm (6.4 in)
1953
137.9 mm (5.4 in)
1954
82.8 mm (3.3 in)
1955
67.1 mm (2.6 in)
1956
172.2 mm (6.8 in)
1957
63.2 mm (2.5 in)
1958
70.1 mm (2.8 in)
1959
83.8 mm (3.3 in)
1960
50.5 mm (2.0 in)
1961
104.4 mm (4.1 in)
1962
96.0 mm (3.8 in)
1963
118.1 mm (4.6 in)
1964
107.7 mm (4.2 in)
1965
81.0 mm (3.2 in)
1966
89.4 mm (3.5 in)
1967
86.6 mm (3.4 in)
1968
73.9 mm (2.9 in)
1969
84.6 mm (3.3 in)
1970
97.8 mm (3.9 in)
1971
62.5 mm (2.5 in)
1972
69.9 mm (2.8 in)
1973
47.2 mm (1.9 in)
1974
72.8 mm (2.9 in)
1975
74.2 mm (2.9 in)
1976
58.2 mm (2.3 in)
1977
104.6 mm (4.1 in)
1978
78.8 mm (3.1 in)
1979
40.8 mm (1.6 in)
1980
30.0 mm (1.2 in)
1981
68.6 mm (2.7 in)
1982
57.0 mm (2.2 in)
1983
49.4 mm (1.9 in)
1984
73.6 mm (2.9 in)
1985
47.2 mm (1.9 in)
1986
92.2 mm (3.6 in)
1987
61.2 mm (2.4 in)
1988
86.9 mm (3.4 in)
1989
102.0 mm (4.0 in)
1990
136.6 mm (5.4 in)
1991
77.2 mm (3.0 in)
1992
164.0 mm (6.5 in)
1993
25.8 mm (1.0 in)
1994
47.0 mm (1.9 in)
1997
31.0 mm (1.2 in)
1998
77.0 mm (3.0 in)
1999
45.0 mm (1.8 in)
2000
51.1 mm (2.0 in)
2001
71.1 mm (2.8 in)
2002
101.1 mm (4.0 in)
2003
55.4 mm (2.2 in)
2004
56.6 mm (2.2 in)
2005
45.5 mm (1.8 in)
2006
89.4 mm (3.5 in)
2007
86.1 mm (3.4 in)
2008
50.8 mm (2.0 in)
2009
58.4 mm (2.3 in)
2010
37.3 mm (1.5 in)
2011
47.0 mm (1.9 in)
2012
56.4 mm (2.2 in)
2013
111.8 mm (4.4 in)
2014
38.1 mm (1.5 in)
2015
113.3 mm (4.5 in)
2016
78.5 mm (3.1 in)
2017
68.6 mm (2.7 in)
2018
54.1 mm (2.1 in)
2019
55.6 mm (2.2 in)
2020
86.9 mm (3.4 in)
2021
66.8 mm (2.6 in)
2022
126.5 mm (5.0 in)
2023
50.3 mm (2.0 in)
2024
133.1 mm (5.2 in)
2025
181.4 mm (7.1 in)
Wettest five days (Rx5day)
The wettest five days of the year at Richmond Raaf, 1928 to 2025. The record is 319.2 mm (12.6 in) in 1990, marked on the chart; the median year is 123.3 mm (4.9 in).
Wettest five days (Rx5day) at Richmond Raaf by year
Year
Wettest five days (Rx5day)
1928
19.1 mm (0.8 in)
1929
244.9 mm (9.6 in)
1930
67.1 mm (2.6 in)
1931
128.6 mm (5.1 in)
1932
80.8 mm (3.2 in)
1933
120.7 mm (4.8 in)
1934
127.5 mm (5.0 in)
1935
104.6 mm (4.1 in)
1936
86.6 mm (3.4 in)
1937
80.9 mm (3.2 in)
1938
105.9 mm (4.2 in)
1939
70.6 mm (2.8 in)
1940
62.0 mm (2.4 in)
1941
42.1 mm (1.7 in)
1942
262.6 mm (10.3 in)
1943
177.7 mm (7.0 in)
1944
48.2 mm (1.9 in)
1945
199.6 mm (7.9 in)
1946
278.8 mm (11.0 in)
1953
203.9 mm (8.0 in)
1954
112.3 mm (4.4 in)
1955
152.4 mm (6.0 in)
1956
245.6 mm (9.7 in)
1957
70.2 mm (2.8 in)
1958
147.4 mm (5.8 in)
1959
108.4 mm (4.3 in)
1960
86.1 mm (3.4 in)
1961
287.1 mm (11.3 in)
1962
205.0 mm (8.1 in)
1963
193.0 mm (7.6 in)
1964
261.6 mm (10.3 in)
1965
125.5 mm (4.9 in)
1966
156.5 mm (6.2 in)
1967
151.9 mm (6.0 in)
1968
103.1 mm (4.1 in)
1969
194.9 mm (7.7 in)
1970
125.3 mm (4.9 in)
1971
110.0 mm (4.3 in)
1972
142.7 mm (5.6 in)
1973
119.1 mm (4.7 in)
1974
124.2 mm (4.9 in)
1975
99.6 mm (3.9 in)
1976
209.6 mm (8.3 in)
1977
150.0 mm (5.9 in)
1978
192.8 mm (7.6 in)
1979
91.4 mm (3.6 in)
1980
43.8 mm (1.7 in)
1981
123.0 mm (4.8 in)
1982
91.8 mm (3.6 in)
1983
91.4 mm (3.6 in)
1984
101.3 mm (4.0 in)
1985
80.0 mm (3.1 in)
1986
99.6 mm (3.9 in)
1987
140.6 mm (5.5 in)
1988
163.0 mm (6.4 in)
1989
172.6 mm (6.8 in)
1990
319.2 mm (12.6 in)
1991
162.8 mm (6.4 in)
1992
268.4 mm (10.6 in)
1993
46.0 mm (1.8 in)
1994
88.4 mm (3.5 in)
1997
48.5 mm (1.9 in)
1998
96.6 mm (3.8 in)
1999
77.0 mm (3.0 in)
2000
105.2 mm (4.1 in)
2001
118.0 mm (4.6 in)
2002
160.0 mm (6.3 in)
2003
123.0 mm (4.8 in)
2004
123.5 mm (4.9 in)
2005
98.0 mm (3.9 in)
2006
141.2 mm (5.6 in)
2007
147.3 mm (5.8 in)
2008
156.2 mm (6.1 in)
2009
102.9 mm (4.1 in)
2010
108.7 mm (4.3 in)
2011
105.2 mm (4.1 in)
2012
114.1 mm (4.5 in)
2013
158.6 mm (6.2 in)
2014
94.4 mm (3.7 in)
2015
167.9 mm (6.6 in)
2016
156.9 mm (6.2 in)
2017
125.2 mm (4.9 in)
2018
62.7 mm (2.5 in)
2019
79.6 mm (3.1 in)
2020
206.3 mm (8.1 in)
2021
287.6 mm (11.3 in)
2022
317.0 mm (12.5 in)
2023
60.5 mm (2.4 in)
2024
198.5 mm (7.8 in)
2025
235.5 mm (9.3 in)
Longest dry spell (CDD)
The longest dry spell of the year at Richmond Raaf, 1928 to 2025. The record is 71 days in 2017, marked on the chart; the median year is 27 days.
Longest dry spell (CDD) at Richmond Raaf by year
Year
Longest dry spell (CDD)
1928
21 days
1929
36 days
1930
25 days
1931
41 days
1932
21 days
1933
21 days
1934
17 days
1935
31 days
1936
19 days
1937
21 days
1938
33 days
1939
34 days
1940
48 days
1941
23 days
1942
21 days
1943
29 days
1944
30 days
1945
22 days
1946
18 days
1953
38 days
1954
32 days
1955
20 days
1956
17 days
1957
29 days
1958
31 days
1959
23 days
1960
22 days
1961
30 days
1962
34 days
1963
22 days
1964
41 days
1965
30 days
1966
31 days
1967
26 days
1968
29 days
1969
22 days
1970
40 days
1971
32 days
1972
40 days
1973
40 days
1974
27 days
1975
42 days
1976
35 days
1977
42 days
1978
26 days
1979
31 days
1980
47 days
1981
36 days
1982
42 days
1983
27 days
1984
29 days
1985
27 days
1986
32 days
1987
27 days
1988
47 days
1989
26 days
1990
26 days
1991
35 days
1992
22 days
1993
22 days
1994
38 days
1997
20 days
1998
13 days
1999
14 days
2000
6 days
2001
3 days
2002
19 days
2003
15 days
2004
25 days
2005
52 days
2006
33 days
2007
24 days
2008
20 days
2009
36 days
2010
27 days
2011
27 days
2012
41 days
2013
38 days
2014
23 days
2015
30 days
2016
19 days
2017
71 days
2018
29 days
2019
50 days
2020
27 days
2021
26 days
2022
19 days
2023
19 days
2024
41 days
2025
17 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
40 years with a frost
Across 40 years with a frost, the median last spring frost at Richmond Raaf falls on 11 August and the median first autumn frost on 13 June, which leaves a median of 303 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 Richmond Raaf
Measure
Median, all years
Earliest period
Recent period (1964 to 1993)
Recent against earliest
Fitted trend
Last spring frost
11 August
n/a
12 August
n/a
-3.0 days per decade
First autumn frost
13 June
n/a
12 June
n/a
+1.5 days per decade
Growing days
303 days
n/a
302 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
77 years, 1929 to 2023
A day with at least 70.7 mm (2.8 in) of rain is expected about once in 2 years. A day with at least 167.8 mm (6.6 in) of rain is expected about once in 100 years.
Rainfall return levels at Richmond Raaf: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
70.7 mm (2.8 in)
5 years
97.4 mm (3.8 in)
10 years
114.8 mm (4.5 in)
25 years
136.4 mm (5.4 in)
50 years
152.2 mm (6.0 in)
100 years
167.8 mm (6.6 in)
Longer than the 77 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, 77 years of values from 1929 to 2023.
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: 172.2 mm (6.8 in) in 1956; 164.0 mm (6.5 in) in 1992; 163.8 mm (6.4 in) in 1942.
Station Changes
1 suspected
One change was suspected in the annual mean temperature of Richmond Raaf, at 1970. Each is measured against neighbouring stations.
Relative to 5 neighbouring stations, the station's annual mean temperature from 1970 ran 0.3 C (0.6 F) lower than in the years before (likely change).
Suspected changes in the annual mean temperature at Richmond Raaf, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
1970
-0.3
-0.6
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.
Download the Data
Data for Richmond Raaf standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Richmond Raaf 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 2026-10-12 (12 October 2026). Records are computed by this site and are not official.