Record envelope, standing records and threshold days for McMillin Rsvr (USC00455224), Washington, United States, with 86 years of record.
Key Facts for McMillin Rsvr
McMillin Rsvr (USC00455224) is a weather station in Washington, United States at 47.14 latitude and -122.26 longitude, 174 m (570 ft) above sea level.
The station reports from 1941 to 2026, 86 years of record.
1,464 records set at McMillin Rsvr still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
McMillin Rsvr tied a daily record high minimum temperature of 16.1 C (61.0 F) on 22 July 2026.
About the Station
Location: Washington, United States, 47.14 latitude, -122.26 longitude.
Elevation: 174 m (570 ft).
Period of record: 1941 to 2026, 86 years.
Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
3 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 McMillin Rsvr. The lines show the 2026 daily maximum and minimum. 3 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at McMillin Rsvr, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
18.9 C (66.0 F)
-17.8 C (0.0 F)
14.4 C (57.9 F)
-5.0 C (23.0 F)
Feb
19.4 C (66.9 F)
-16.1 C (3.0 F)
15.0 C (59.0 F)
-3.3 C (26.1 F)
Mar
26.1 C (79.0 F)
-12.8 C (9.0 F)
17.2 C (63.0 F)
-1.1 C (30.0 F)
Apr
28.9 C (84.0 F)
-5.0 C (23.0 F)
22.8 C (73.0 F)
0.0 C (32.0 F)
May
33.3 C (91.9 F)
-3.3 C (26.1 F)
26.1 C (79.0 F)
2.2 C (36.0 F)
Jun
37.2 C (99.0 F)
0.0 C (32.0 F)
32.2 C (90.0 F)
4.4 C (39.9 F)
Jul
38.9 C (102.0 F)
2.2 C (36.0 F)
33.3 C (91.9 F)
8.3 C (46.9 F)
Aug
37.8 C (100.0 F)
2.8 C (37.0 F)
30.6 C (87.1 F)
8.3 C (46.9 F)
Sep
35.0 C (95.0 F)
-1.7 C (28.9 F)
25.6 C (78.1 F)
3.9 C (39.0 F)
Oct
30.0 C (86.0 F)
-6.1 C (21.0 F)
18.9 C (66.0 F)
7.2 C (45.0 F)
Nov
22.8 C (73.0 F)
-17.8 C (0.0 F)
n/a
n/a
Dec
18.9 C (66.0 F)
-18.3 C (-0.9 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at McMillin Rsvr still stand. 1972 holds the most, with 42.
Standing records at McMillin Rsvr by the year they were set
Year set
Standing records
1941
31
1942
27
1943
15
1944
24
1945
18
1946
10
1947
22
1948
11
1949
36
1950
39
1951
24
1952
22
1953
15
1954
22
1955
39
1956
25
1957
15
1958
26
1959
17
1960
28
1961
21
1962
21
1963
26
1964
19
1965
21
1966
16
1967
9
1968
17
1969
17
1970
18
1971
19
1972
42
1973
21
1974
15
1975
12
1976
24
1977
15
1978
12
1979
19
1980
21
1981
19
1982
21
1983
20
1984
20
1985
26
1986
17
1987
21
1988
14
1989
16
1990
15
1991
18
1992
18
1993
9
1994
13
1995
13
1996
17
1997
12
1998
9
1999
14
2000
7
2001
6
2002
15
2003
21
2004
9
2005
16
2006
11
2007
12
2008
16
2009
14
2010
10
2011
13
2012
12
2013
8
2014
17
2015
6
2016
12
2017
8
2018
11
2019
9
2020
8
2021
11
2022
7
2023
13
2024
10
2025
12
2026
7
All-Time Record Progression
7 new records
7 all-time records were set at McMillin Rsvr between 25 January 1972 and 30 July 2009. Each dot is a new record.
When McMillin Rsvr set new all-time records
Date
Kind
Detail
1972-01-25
Record daily snowfall
Record daily snowfall 34.3 cm (13.5 in)
1974-12-27
Record daily snowfall
Record daily snowfall 40.6 cm (16.0 in)
1981-08-10
Record high maximum temperature
Record high maximum temperature 37.8 C (100.0 F)
1983-12-23
Record low minimum temperature
Record low minimum temperature -18.3 C (-0.9 F)
1986-11-24
Record daily precipitation
Record daily precipitation 89.4 mm (3.5 in)
2006-11-07
Record daily precipitation
Record daily precipitation 91.2 mm (3.6 in)
2009-07-30
Record high maximum temperature
Record high maximum temperature 38.9 C (102.0 F)
Wettest Day of Each Month
Nov: 91.2 mm (3.6 in)
The wettest day on record for each calendar month at McMillin Rsvr. The most was 91.2 mm (3.6 in) on 7 November 2006.
Record daily precipitation for each month at McMillin Rsvr
Month
Record daily precipitation (mm)
Date
Jan
63.5 mm (2.5 in)
7 January 2009
Feb
69.1 mm (2.7 in)
8 February 1996
Mar
54.6 mm (2.1 in)
27 March 2005
Apr
66.0 mm (2.6 in)
5 April 1991
May
49.3 mm (1.9 in)
15 May 2011
Jun
49.3 mm (1.9 in)
2 June 1968
Jul
45.2 mm (1.8 in)
9 July 1946
Aug
63.0 mm (2.5 in)
27 August 1960
Sep
69.1 mm (2.7 in)
6 September 2013
Oct
78.0 mm (3.1 in)
21 October 2003
Nov
91.2 mm (3.6 in)
7 November 2006
Dec
67.8 mm (2.7 in)
27 December 1974
Period of Record Coverage
1941 to 2026
Complete yearUnder 90 percent of days
86 years of record at McMillin Rsvr, 1941 to 2026. 16 years have data for under 90 percent of days and are left out of rankings: 1941, 2011, 2013, 2014, 2015, 2016, 2017, 2018 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 68 complete years at McMillin Rsvr, 1942 to 2012. Blue stripes are years cooler than the station's own mean of 10.0 C (50.0 F); red stripes are warmer. The coolest year was 1955, at 8.4 C (47.0 F), and the warmest was 1958, at 11.5 C (52.6 F). The strongest colour marks a difference of 1.7 C (3.1 F).
Annual mean temperature at McMillin Rsvr as warming stripes, 1942 to 2012
Year
Annual mean temperature
Difference from the station mean
1942
10.6 C
+0.64 C
1943
10.0 C
-0.02 C
1944
10.1 C
+0.09 C
1945
10.0 C
+0.02 C
1946
9.9 C
-0.09 C
1947
10.6 C
+0.63 C
1948
9.4 C
-0.55 C
1949
9.7 C
-0.30 C
1950
9.3 C
-0.64 C
1951
9.8 C
-0.21 C
1952
9.9 C
-0.13 C
1953
10.4 C
+0.45 C
1954
9.3 C
-0.67 C
1955
8.4 C
-1.62 C
1956
9.4 C
-0.59 C
1957
9.7 C
-0.28 C
1958
11.5 C
+1.48 C
1959
9.9 C
-0.07 C
1960
9.8 C
-0.20 C
1961
10.5 C
+0.49 C
1962
10.0 C
-0.01 C
1963
10.1 C
+0.14 C
1964
9.1 C
-0.93 C
1965
10.1 C
+0.11 C
1966
10.2 C
+0.19 C
1967
10.6 C
+0.57 C
1968
10.0 C
-0.02 C
1969
9.8 C
-0.18 C
1970
9.7 C
-0.25 C
1971
9.3 C
-0.65 C
1972
9.2 C
-0.80 C
1973
9.7 C
-0.31 C
1974
10.0 C
-0.03 C
1975
9.4 C
-0.58 C
1976
9.5 C
-0.44 C
1977
9.8 C
-0.19 C
1978
9.9 C
-0.09 C
1979
10.0 C
+0.02 C
1980
9.9 C
-0.13 C
1981
10.2 C
+0.23 C
1982
9.3 C
-0.71 C
1983
9.8 C
-0.15 C
1984
9.5 C
-0.51 C
1985
8.7 C
-1.29 C
1986
10.3 C
+0.36 C
1987
10.8 C
+0.80 C
1988
10.1 C
+0.15 C
1989
9.9 C
-0.07 C
1990
10.2 C
+0.23 C
1991
10.2 C
+0.24 C
1992
11.1 C
+1.09 C
1993
9.8 C
-0.23 C
1994
10.4 C
+0.44 C
1996
9.9 C
-0.07 C
1997
10.8 C
+0.80 C
1998
10.9 C
+0.92 C
1999
10.0 C
-0.02 C
2000
9.9 C
-0.13 C
2001
9.9 C
-0.13 C
2002
10.1 C
+0.12 C
2003
10.9 C
+0.87 C
2004
11.0 C
+1.03 C
2005
10.5 C
+0.54 C
2006
10.4 C
+0.44 C
2007
10.1 C
+0.11 C
2008
9.5 C
-0.44 C
2010
10.3 C
+0.29 C
2012
10.0 C
-0.03 C
The annual mean temperature here has risen by 0.07 C (0.00 to 0.13) per decade over 1942 to 2012. In Fahrenheit: 0.12 F (0.00 to 0.23) per decade. The slope is a straight line fitted to 68 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at McMillin Rsvr
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.07 C (0.00 to 0.13) per decade
0.12 F (0.00 to 0.23) per decade
1942 to 2012
68
Rise
Mean daily maximum
-0.06 C (-0.14 to 0.02) per decade
-0.11 F (-0.25 to 0.03) per decade
1942 to 2012
68
Not clearly different from zero
Mean daily minimum
0.2 C (0.1 to 0.3) per decade
0.3 F (0.2 to 0.5) per decade
1942 to 2012
68
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
1941 to 2026
Yearly extremes at McMillin Rsvr: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
38.9 C (102.0 F)
2009
33.3 C (91.9 F)
86
Coldest night (TNn)
-18.3 C (-0.9 F)
1983
-9.7 C (14.5 F)
86
Wettest day (Rx1day)
91.2 mm (3.6 in)
2006
44.8 mm (1.8 in)
86
Wettest five days (Rx5day)
177.0 mm (7.0 in)
2006
87.4 mm (3.4 in)
78
Longest dry spell (CDD)
70 days
2012
26 days
86
Hottest day (TXx)
The hottest day of the year at McMillin Rsvr, 1941 to 2026. The record is 38.9 C (102.0 F) in 2009, marked on the chart; the median year is 33.3 C (91.9 F).
Hottest day (TXx) at McMillin Rsvr by year
Year
Hottest day (TXx)
1941
36.1 C (97.0 F)
1942
35.6 C (96.1 F)
1943
31.7 C (89.1 F)
1944
34.4 C (93.9 F)
1945
32.2 C (90.0 F)
1946
32.8 C (91.0 F)
1947
31.1 C (88.0 F)
1948
31.7 C (89.1 F)
1949
33.3 C (91.9 F)
1950
31.7 C (89.1 F)
1951
33.9 C (93.0 F)
1952
33.9 C (93.0 F)
1953
31.1 C (88.0 F)
1954
28.3 C (82.9 F)
1955
36.1 C (97.0 F)
1956
34.4 C (93.9 F)
1957
29.4 C (84.9 F)
1958
36.7 C (98.1 F)
1959
32.8 C (91.0 F)
1960
36.7 C (98.1 F)
1961
35.0 C (95.0 F)
1962
31.7 C (89.1 F)
1963
32.2 C (90.0 F)
1964
31.1 C (88.0 F)
1965
32.8 C (91.0 F)
1966
31.1 C (88.0 F)
1967
32.8 C (91.0 F)
1968
33.3 C (91.9 F)
1969
31.7 C (89.1 F)
1970
35.0 C (95.0 F)
1971
35.0 C (95.0 F)
1972
33.9 C (93.0 F)
1973
31.7 C (89.1 F)
1974
32.2 C (90.0 F)
1975
31.1 C (88.0 F)
1976
28.9 C (84.0 F)
1977
36.1 C (97.0 F)
1978
34.4 C (93.9 F)
1979
34.4 C (93.9 F)
1980
30.6 C (87.1 F)
1981
37.8 C (100.0 F)
1982
33.9 C (93.0 F)
1983
33.3 C (91.9 F)
1984
32.8 C (91.0 F)
1985
34.4 C (93.9 F)
1986
32.8 C (91.0 F)
1987
32.8 C (91.0 F)
1988
35.0 C (95.0 F)
1989
30.6 C (87.1 F)
1990
33.3 C (91.9 F)
1991
35.6 C (96.1 F)
1992
33.9 C (93.0 F)
1993
34.4 C (93.9 F)
1994
36.7 C (98.1 F)
1995
35.0 C (95.0 F)
1996
32.8 C (91.0 F)
1997
31.7 C (89.1 F)
1998
35.6 C (96.1 F)
1999
29.4 C (84.9 F)
2000
31.7 C (89.1 F)
2001
31.1 C (88.0 F)
2002
32.8 C (91.0 F)
2003
34.4 C (93.9 F)
2004
35.6 C (96.1 F)
2005
31.7 C (89.1 F)
2006
35.6 C (96.1 F)
2007
34.4 C (93.9 F)
2008
33.3 C (91.9 F)
2009
38.9 C (102.0 F)
2010
33.3 C (91.9 F)
2011
25.0 C (77.0 F)
2012
32.8 C (91.0 F)
2013
31.7 C (89.1 F)
2014
34.4 C (93.9 F)
2015
34.4 C (93.9 F)
2016
33.3 C (91.9 F)
2017
34.4 C (93.9 F)
2018
32.2 C (90.0 F)
2019
30.6 C (87.1 F)
2020
34.4 C (93.9 F)
2021
37.2 C (99.0 F)
2022
34.4 C (93.9 F)
2023
34.4 C (93.9 F)
2024
35.0 C (95.0 F)
2025
32.8 C (91.0 F)
2026
33.3 C (91.9 F)
Coldest night (TNn)
The coldest night of the year at McMillin Rsvr, 1941 to 2026. The record is -18.3 C (-0.9 F) in 1983, marked on the chart; the median year is -9.7 C (14.5 F).
Coldest night (TNn) at McMillin Rsvr by year
Year
Coldest night (TNn)
1941
-6.7 C (19.9 F)
1942
-11.7 C (10.9 F)
1943
-14.4 C (6.1 F)
1944
-8.3 C (17.1 F)
1945
-8.9 C (16.0 F)
1946
-7.8 C (18.0 F)
1947
-11.7 C (10.9 F)
1948
-10.0 C (14.0 F)
1949
-13.3 C (8.1 F)
1950
-17.8 C (0.0 F)
1951
-15.6 C (3.9 F)
1952
-12.8 C (9.0 F)
1953
-4.4 C (24.1 F)
1954
-12.8 C (9.0 F)
1955
-17.8 C (0.0 F)
1956
-13.9 C (7.0 F)
1957
-16.7 C (1.9 F)
1958
-7.8 C (18.0 F)
1959
-15.6 C (3.9 F)
1960
-8.9 C (16.0 F)
1961
-8.9 C (16.0 F)
1962
-13.9 C (7.0 F)
1963
-15.0 C (5.0 F)
1964
-15.6 C (3.9 F)
1965
-7.2 C (19.0 F)
1966
-3.9 C (25.0 F)
1967
-7.2 C (19.0 F)
1968
-16.1 C (3.0 F)
1969
-12.2 C (10.0 F)
1970
-8.3 C (17.1 F)
1971
-9.4 C (15.1 F)
1972
-17.2 C (1.0 F)
1973
-15.0 C (5.0 F)
1974
-12.8 C (9.0 F)
1975
-7.8 C (18.0 F)
1976
-6.7 C (19.9 F)
1977
-9.4 C (15.1 F)
1978
-16.1 C (3.0 F)
1979
-16.1 C (3.0 F)
1980
-15.0 C (5.0 F)
1981
-6.7 C (19.9 F)
1982
-13.3 C (8.1 F)
1983
-18.3 C (-0.9 F)
1984
-11.1 C (12.0 F)
1985
-16.7 C (1.9 F)
1986
-8.3 C (17.1 F)
1987
-7.2 C (19.0 F)
1988
-10.0 C (14.0 F)
1989
-15.6 C (3.9 F)
1990
-16.7 C (1.9 F)
1991
-6.7 C (19.9 F)
1992
-5.6 C (21.9 F)
1993
-10.6 C (12.9 F)
1994
-8.9 C (16.0 F)
1995
-7.8 C (18.0 F)
1996
-12.2 C (10.0 F)
1997
-6.7 C (19.9 F)
1998
-12.2 C (10.0 F)
1999
-3.9 C (25.0 F)
2000
-5.6 C (21.9 F)
2001
-5.0 C (23.0 F)
2002
-4.4 C (24.1 F)
2003
-5.6 C (21.9 F)
2004
-10.0 C (14.0 F)
2005
-6.7 C (19.9 F)
2006
-9.4 C (15.1 F)
2007
-8.9 C (16.0 F)
2008
-11.1 C (12.0 F)
2009
-11.1 C (12.0 F)
2010
-12.8 C (9.0 F)
2011
-9.4 C (15.1 F)
2012
-4.4 C (24.1 F)
2013
-11.1 C (12.0 F)
2014
-10.6 C (12.9 F)
2015
-6.7 C (19.9 F)
2016
-7.8 C (18.0 F)
2017
-8.9 C (16.0 F)
2018
-7.8 C (18.0 F)
2019
-10.6 C (12.9 F)
2020
-3.3 C (26.1 F)
2021
-11.1 C (12.0 F)
2022
-8.3 C (17.1 F)
2023
-8.9 C (16.0 F)
2024
-10.6 C (12.9 F)
2025
-8.9 C (16.0 F)
2026
-5.0 C (23.0 F)
Wettest day (Rx1day)
The wettest day of the year at McMillin Rsvr, 1941 to 2026. The record is 91.2 mm (3.6 in) in 2006, marked on the chart; the median year is 44.8 mm (1.8 in).
Wettest day (Rx1day) at McMillin Rsvr by year
Year
Wettest day (Rx1day)
1941
56.4 mm (2.2 in)
1942
34.3 mm (1.4 in)
1943
27.4 mm (1.1 in)
1944
22.9 mm (0.9 in)
1945
35.3 mm (1.4 in)
1946
49.0 mm (1.9 in)
1947
33.0 mm (1.3 in)
1948
47.2 mm (1.9 in)
1949
46.2 mm (1.8 in)
1950
46.5 mm (1.8 in)
1951
55.9 mm (2.2 in)
1952
27.7 mm (1.1 in)
1953
40.6 mm (1.6 in)
1954
49.5 mm (1.9 in)
1955
40.9 mm (1.6 in)
1956
33.3 mm (1.3 in)
1957
32.0 mm (1.3 in)
1958
44.5 mm (1.8 in)
1959
77.7 mm (3.1 in)
1960
63.0 mm (2.5 in)
1961
31.0 mm (1.2 in)
1962
50.8 mm (2.0 in)
1963
41.9 mm (1.6 in)
1964
50.5 mm (2.0 in)
1965
37.8 mm (1.5 in)
1966
31.8 mm (1.3 in)
1967
38.4 mm (1.5 in)
1968
49.3 mm (1.9 in)
1969
37.1 mm (1.5 in)
1970
43.7 mm (1.7 in)
1971
43.4 mm (1.7 in)
1972
38.4 mm (1.5 in)
1973
33.5 mm (1.3 in)
1974
67.8 mm (2.7 in)
1975
38.6 mm (1.5 in)
1976
36.1 mm (1.4 in)
1977
37.8 mm (1.5 in)
1978
46.0 mm (1.8 in)
1979
49.0 mm (1.9 in)
1980
38.1 mm (1.5 in)
1981
45.7 mm (1.8 in)
1982
37.1 mm (1.5 in)
1983
49.5 mm (1.9 in)
1984
48.3 mm (1.9 in)
1985
34.3 mm (1.4 in)
1986
89.4 mm (3.5 in)
1987
55.9 mm (2.2 in)
1988
30.5 mm (1.2 in)
1989
45.0 mm (1.8 in)
1990
61.0 mm (2.4 in)
1991
66.0 mm (2.6 in)
1992
37.6 mm (1.5 in)
1993
47.5 mm (1.9 in)
1994
50.8 mm (2.0 in)
1995
43.2 mm (1.7 in)
1996
69.1 mm (2.7 in)
1997
41.9 mm (1.6 in)
1998
68.8 mm (2.7 in)
1999
49.5 mm (1.9 in)
2000
27.9 mm (1.1 in)
2001
59.7 mm (2.4 in)
2002
38.9 mm (1.5 in)
2003
78.0 mm (3.1 in)
2004
33.8 mm (1.3 in)
2005
60.2 mm (2.4 in)
2006
91.2 mm (3.6 in)
2007
53.1 mm (2.1 in)
2008
51.6 mm (2.0 in)
2009
63.5 mm (2.5 in)
2010
32.0 mm (1.3 in)
2011
49.3 mm (1.9 in)
2012
37.3 mm (1.5 in)
2013
69.1 mm (2.7 in)
2014
31.8 mm (1.3 in)
2015
63.5 mm (2.5 in)
2016
35.6 mm (1.4 in)
2017
51.8 mm (2.0 in)
2018
26.9 mm (1.1 in)
2019
50.8 mm (2.0 in)
2020
39.1 mm (1.5 in)
2021
42.7 mm (1.7 in)
2022
51.3 mm (2.0 in)
2023
54.6 mm (2.1 in)
2024
34.3 mm (1.4 in)
2025
49.3 mm (1.9 in)
2026
43.9 mm (1.7 in)
Wettest five days (Rx5day)
The wettest five days of the year at McMillin Rsvr, 1941 to 2026. The record is 177.0 mm (7.0 in) in 2006, marked on the chart; the median year is 87.4 mm (3.4 in).
Wettest five days (Rx5day) at McMillin Rsvr by year
Year
Wettest five days (Rx5day)
1941
118.8 mm (4.7 in)
1942
82.8 mm (3.3 in)
1943
61.9 mm (2.4 in)
1944
44.3 mm (1.7 in)
1945
69.5 mm (2.7 in)
1946
101.6 mm (4.0 in)
1947
112.8 mm (4.4 in)
1948
68.1 mm (2.7 in)
1949
80.3 mm (3.2 in)
1950
94.8 mm (3.7 in)
1951
140.7 mm (5.5 in)
1952
48.5 mm (1.9 in)
1953
84.3 mm (3.3 in)
1954
91.9 mm (3.6 in)
1955
94.7 mm (3.7 in)
1956
96.3 mm (3.8 in)
1957
75.8 mm (3.0 in)
1958
79.1 mm (3.1 in)
1959
145.3 mm (5.7 in)
1960
138.2 mm (5.4 in)
1961
74.4 mm (2.9 in)
1962
72.1 mm (2.8 in)
1963
82.6 mm (3.3 in)
1964
93.2 mm (3.7 in)
1965
100.7 mm (4.0 in)
1966
72.1 mm (2.8 in)
1967
69.3 mm (2.7 in)
1968
91.0 mm (3.6 in)
1969
84.3 mm (3.3 in)
1970
78.0 mm (3.1 in)
1971
81.9 mm (3.2 in)
1972
99.2 mm (3.9 in)
1973
79.0 mm (3.1 in)
1974
105.3 mm (4.1 in)
1975
96.9 mm (3.8 in)
1976
67.8 mm (2.7 in)
1977
94.1 mm (3.7 in)
1978
61.2 mm (2.4 in)
1979
111.1 mm (4.4 in)
1980
83.4 mm (3.3 in)
1981
88.6 mm (3.5 in)
1982
121.2 mm (4.8 in)
1983
106.2 mm (4.2 in)
1984
76.7 mm (3.0 in)
1985
103.4 mm (4.1 in)
1986
146.0 mm (5.7 in)
1987
82.9 mm (3.3 in)
1988
74.9 mm (2.9 in)
1989
87.7 mm (3.5 in)
1990
160.8 mm (6.3 in)
1991
116.7 mm (4.6 in)
1992
80.4 mm (3.2 in)
1993
62.1 mm (2.4 in)
1994
95.1 mm (3.7 in)
1995
123.5 mm (4.9 in)
1996
151.6 mm (6.0 in)
1997
130.7 mm (5.1 in)
1998
150.6 mm (5.9 in)
1999
128.7 mm (5.1 in)
2000
58.1 mm (2.3 in)
2001
113.1 mm (4.5 in)
2002
74.9 mm (2.9 in)
2003
106.4 mm (4.2 in)
2004
60.5 mm (2.4 in)
2005
87.1 mm (3.4 in)
2006
177.0 mm (7.0 in)
2007
106.5 mm (4.2 in)
2008
101.1 mm (4.0 in)
2009
141.2 mm (5.6 in)
2010
85.0 mm (3.3 in)
2011
83.8 mm (3.3 in)
2012
96.0 mm (3.8 in)
2013
75.0 mm (3.0 in)
2014
72.5 mm (2.9 in)
2015
6.9 mm (0.27 in)
2016
n/a
2017
n/a
2018
n/a
2019
n/a
2020
0.0 mm (0.00 in)
2021
n/a
2022
n/a
2023
25.6 mm (1.0 in)
2024
n/a
2025
n/a
2026
22.8 mm (0.9 in)
Longest dry spell (CDD)
The longest dry spell of the year at McMillin Rsvr, 1941 to 2026. The record is 70 days in 2012, marked on the chart; the median year is 26 days.
Longest dry spell (CDD) at McMillin Rsvr by year
Year
Longest dry spell (CDD)
1941
38 days
1942
39 days
1943
26 days
1944
31 days
1945
42 days
1946
43 days
1947
18 days
1948
13 days
1949
26 days
1950
30 days
1951
52 days
1952
42 days
1953
21 days
1954
23 days
1955
42 days
1956
26 days
1957
26 days
1958
34 days
1959
21 days
1960
55 days
1961
54 days
1962
27 days
1963
23 days
1964
12 days
1965
26 days
1966
41 days
1967
43 days
1968
25 days
1969
24 days
1970
25 days
1971
40 days
1972
32 days
1973
29 days
1974
31 days
1975
32 days
1976
16 days
1977
37 days
1978
23 days
1979
33 days
1980
40 days
1981
46 days
1982
19 days
1983
16 days
1984
36 days
1985
46 days
1986
43 days
1987
31 days
1988
33 days
1989
23 days
1990
41 days
1991
38 days
1992
29 days
1993
43 days
1994
33 days
1995
23 days
1996
19 days
1997
45 days
1998
49 days
1999
16 days
2000
26 days
2001
24 days
2002
20 days
2003
26 days
2004
27 days
2005
25 days
2006
36 days
2007
17 days
2008
23 days
2009
49 days
2010
35 days
2011
27 days
2012
70 days
2013
11 days
2014
4 days
2015
4 days
2016
4 days
2017
4 days
2018
4 days
2019
4 days
2020
5 days
2021
4 days
2022
4 days
2023
4 days
2024
4 days
2025
4 days
2026
4 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
68 years with a frost
Across 68 years with a frost, the median last spring frost at McMillin Rsvr falls on 24 April and the median first autumn frost on 19 October, which leaves a median of 178 days between them.
In 1980 to 2012 the median growing season was 193 days. That is 26 days more than in 1942 to 1971.
Fitted over all years, the growing season changes by +5.1 days per decade at this station.
Frost dates and growing season at McMillin Rsvr
Measure
Median, all years
Earliest period (1942 to 1971)
Recent period (1980 to 2012)
Recent against earliest
Fitted trend
Last spring frost
24 April
4 May
14 April
20 days earlier
-4.1 days per decade
First autumn frost
19 October
18 October
20 October
2 days later
+1.0 days per decade
Growing days
178 days
167 days
193 days
26 days more
+5.1 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
71 years, 1942 to 2012
A day with at least 43.6 mm (1.7 in) of rain is expected about once in 2 years. A day with at least 95.2 mm (3.7 in) of rain is expected about once in 100 years.
Rainfall return levels at McMillin Rsvr: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
43.6 mm (1.7 in)
5 years
56.1 mm (2.2 in)
10 years
64.9 mm (2.6 in)
25 years
76.6 mm (3.0 in)
50 years
85.7 mm (3.4 in)
100 years
95.2 mm (3.7 in)
Longer than the 71 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, 71 years of values from 1942 to 2012.
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: 91.2 mm (3.6 in) in 2006; 89.4 mm (3.5 in) in 1986; 78.0 mm (3.1 in) in 2003.
Station Changes
1 suspected
One change was suspected in the annual mean temperature of McMillin Rsvr, at 1956. Each is measured against neighbouring stations.
Relative to 5 neighbouring stations, the station's annual mean temperature from 1956 ran 0.2 C (0.3 F) lower than in the years before (possible change).
Suspected changes in the annual mean temperature at McMillin Rsvr, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
1956
-0.1
-0.3
possible
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 McMillin Rsvr standing records by year: CSV or JSON. Field meanings are on the data page.
Data for McMillin Rsvr 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.