Record envelope, standing records and threshold days for Roy (USC00297638), New Mexico, United States, with 110 years of record.
Key Facts for Roy
Roy (USC00297638) is a weather station in New Mexico, United States at 35.93 latitude and -104.14 longitude, 1,751 m (5,743 ft) above sea level.
The station reports from 1905 to 2014, 110 years of record.
1,464 records set at Roy still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Roy set a daily record low minimum temperature of -16.1 C (3.0 F) on 25 November 2014.
About the Station
Location: New Mexico, United States, 35.93 latitude, -104.14 longitude.
Elevation: 1,751 m (5,743 ft).
Period of record: 1905 to 2014, 110 years.
Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
0 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 Roy. 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 Roy, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
23.9 C (75.0 F)
-31.7 C (-25.1 F)
n/a
n/a
Feb
23.9 C (75.0 F)
-28.3 C (-18.9 F)
n/a
n/a
Mar
28.3 C (82.9 F)
-23.3 C (-9.9 F)
n/a
n/a
Apr
31.7 C (89.1 F)
-14.4 C (6.1 F)
n/a
n/a
May
35.6 C (96.1 F)
-5.6 C (21.9 F)
n/a
n/a
Jun
38.9 C (102.0 F)
-2.2 C (28.0 F)
n/a
n/a
Jul
40.0 C (104.0 F)
6.1 C (43.0 F)
n/a
n/a
Aug
38.9 C (102.0 F)
5.6 C (42.1 F)
n/a
n/a
Sep
36.7 C (98.1 F)
-2.2 C (28.0 F)
n/a
n/a
Oct
31.7 C (89.1 F)
-13.9 C (7.0 F)
n/a
n/a
Nov
28.3 C (82.9 F)
-26.1 C (-15.0 F)
n/a
n/a
Dec
25.0 C (77.0 F)
-27.2 C (-17.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Roy still stand. 1934 holds the most, with 47.
Standing records at Roy by the year they were set
Year set
Standing records
1905
3
1913
21
1914
21
1915
17
1916
19
1917
29
1918
36
1919
25
1920
19
1921
14
1922
16
1923
21
1924
33
1925
18
1926
28
1927
29
1932
4
1933
10
1934
47
1935
9
1949
9
1950
24
1951
16
1952
19
1953
22
1954
15
1955
34
1956
21
1957
12
1958
10
1959
12
1960
13
1961
17
1962
24
1963
24
1964
14
1965
24
1966
12
1967
16
1968
10
1969
17
1970
26
1971
33
1972
24
1973
19
1974
10
1975
11
1976
14
1977
3
1978
21
1979
16
1980
32
1981
25
1982
22
1983
19
1984
18
1985
9
1986
28
1987
13
1988
14
1989
18
1990
17
1991
14
1992
7
1993
11
1994
4
1995
14
1996
20
1997
21
1998
9
1999
7
2000
9
2001
7
2002
8
2003
9
2004
4
2005
16
2006
20
2007
22
2008
12
2009
14
2010
10
2011
17
2012
22
2014
11
All-Time Record Progression
6 new records
6 all-time records were set at Roy between 25 November 1940 and 19 February 1987. Each dot is a new record.
When Roy set new all-time records
Date
Kind
Detail
1940-11-25
Record daily snowfall
Record daily snowfall 71.1 cm (28.0 in)
1963-01-12
Record low maximum temperature
Record low maximum temperature -18.9 C (-2.0 F)
1963-01-12
Record low minimum temperature
Record low minimum temperature -31.7 C (-25.1 F)
1980-06-24
Record high minimum temperature
Record high minimum temperature 25.0 C (77.0 F)
1980-06-25
Record high minimum temperature
Record high minimum temperature 27.8 C (82.0 F)
1987-02-19
Record snow depth
Record snow depth 58.4 cm (23.0 in)
Wettest Day of Each Month
Apr: 127.0 mm (5.0 in)
The wettest day on record for each calendar month at Roy. The most was 127.0 mm (5.0 in) on 30 April 1914.
Record daily precipitation for each month at Roy
Month
Record daily precipitation (mm)
Date
Jan
25.4 mm (1.0 in)
27 January 2001
Feb
28.2 mm (1.1 in)
20 February 1990
Mar
33.0 mm (1.3 in)
21 March 1941
Apr
127.0 mm (5.0 in)
30 April 1914
May
83.8 mm (3.3 in)
30 May 1938
Jun
76.7 mm (3.0 in)
15 June 1965
Jul
69.9 mm (2.8 in)
10 July 1929
Aug
66.0 mm (2.6 in)
26 August 1979
Sep
110.0 mm (4.3 in)
21 September 1941
Oct
71.9 mm (2.8 in)
6 October 1954
Nov
64.3 mm (2.5 in)
25 November 1940
Dec
34.3 mm (1.4 in)
9 December 1943
Period of Record Coverage
1905 to 2014
Complete yearUnder 90 percent of days
85 years of record at Roy, 1905 to 2014. 23 years have data for under 90 percent of days and are left out of rankings: 1905, 1913, 1922, 1932, 1933, 1949, 1950, 1953 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 54 complete years at Roy, 1914 to 2011. Blue stripes are years cooler than the station's own mean of 11.0 C (51.9 F); red stripes are warmer. The coolest year was 1923, at 9.6 C (49.2 F), and the warmest was 1916, at 12.4 C (54.3 F). The strongest colour marks a difference of 1.5 C (2.7 F).
Annual mean temperature at Roy as warming stripes, 1914 to 2011
Year
Annual mean temperature
Difference from the station mean
1914
11.9 C
+0.85 C
1915
11.0 C
-0.04 C
1916
12.4 C
+1.35 C
1917
11.4 C
+0.31 C
1918
10.9 C
-0.12 C
1919
10.7 C
-0.30 C
1920
10.5 C
-0.56 C
1921
11.6 C
+0.54 C
1923
9.6 C
-1.49 C
1924
9.7 C
-1.36 C
1925
11.4 C
+0.31 C
1926
11.7 C
+0.61 C
1935
11.8 C
+0.77 C
1952
11.1 C
+0.03 C
1955
11.1 C
+0.01 C
1957
11.3 C
+0.26 C
1959
10.7 C
-0.38 C
1961
9.9 C
-1.12 C
1965
11.2 C
+0.11 C
1966
11.3 C
+0.26 C
1967
11.3 C
+0.22 C
1968
10.8 C
-0.26 C
1969
10.8 C
-0.27 C
1970
11.0 C
-0.10 C
1971
10.6 C
-0.40 C
1972
11.1 C
+0.04 C
1973
10.3 C
-0.72 C
1974
11.2 C
+0.13 C
1976
10.4 C
-0.68 C
1977
11.4 C
+0.34 C
1978
11.0 C
-0.03 C
1979
9.9 C
-1.11 C
1980
11.9 C
+0.80 C
1981
12.2 C
+1.20 C
1983
10.3 C
-0.76 C
1986
10.8 C
-0.29 C
1988
10.3 C
-0.71 C
1989
10.1 C
-0.95 C
1990
10.8 C
-0.21 C
1991
10.7 C
-0.37 C
1992
10.8 C
-0.29 C
1993
10.9 C
-0.12 C
1995
11.8 C
+0.73 C
1996
11.5 C
+0.42 C
1997
10.0 C
-1.03 C
2001
11.4 C
+0.32 C
2002
11.9 C
+0.87 C
2005
11.1 C
+0.03 C
2006
11.8 C
+0.71 C
2007
11.3 C
+0.27 C
2008
11.4 C
+0.31 C
2009
11.5 C
+0.49 C
2010
11.6 C
+0.60 C
2011
11.8 C
+0.80 C
The fitted trend in annual mean temperature here over 1914 to 2011 is 0.01 C (-0.04 to 0.07) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.02 F (-0.08 to 0.13) per decade. The slope is a straight line fitted to 54 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Roy
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.01 C (-0.04 to 0.07) per decade
0.02 F (-0.08 to 0.13) per decade
1914 to 2011
54
Not clearly different from zero
Mean daily maximum
0.07 C (0.00 to 0.15) per decade
0.13 F (0.00 to 0.27) per decade
1914 to 2011
54
Not clearly different from zero
Mean daily minimum
-0.05 C (-0.13 to 0.03) per decade
-0.1 F (-0.2 to 0.1) per decade
1914 to 2011
54
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
1905 to 2014
Yearly extremes at Roy: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
40.0 C (104.0 F)
1919
36.1 C (97.0 F)
85
Coldest night (TNn)
-31.7 C (-25.1 F)
1963
-19.4 C (-2.9 F)
85
Wettest day (Rx1day)
127.0 mm (5.0 in)
1914
40.4 mm (1.6 in)
106
Wettest five days (Rx5day)
188.0 mm (7.4 in)
1914
61.6 mm (2.4 in)
106
Longest dry spell (CDD)
132 days
1921
50 days
106
Hottest day (TXx)
The hottest day of the year at Roy, 1905 to 2014. The record is 40.0 C (104.0 F) in 1919, marked on the chart; the median year is 36.1 C (97.0 F).
Hottest day (TXx) at Roy by year
Year
Hottest day (TXx)
1905
23.9 C (75.0 F)
1909
n/a
1910
n/a
1911
n/a
1912
n/a
1913
36.7 C (98.1 F)
1914
33.9 C (93.0 F)
1915
37.8 C (100.0 F)
1916
38.9 C (102.0 F)
1917
38.9 C (102.0 F)
1918
36.7 C (98.1 F)
1919
40.0 C (104.0 F)
1920
32.2 C (90.0 F)
1921
32.2 C (90.0 F)
1922
34.4 C (93.9 F)
1923
34.4 C (93.9 F)
1924
37.2 C (99.0 F)
1925
36.7 C (98.1 F)
1926
34.4 C (93.9 F)
1927
36.7 C (98.1 F)
1928
n/a
1929
n/a
1930
n/a
1931
n/a
1932
21.1 C (70.0 F)
1933
19.4 C (66.9 F)
1934
38.3 C (100.9 F)
1935
36.1 C (97.0 F)
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
35.0 C (95.0 F)
1950
33.9 C (93.0 F)
1951
36.1 C (97.0 F)
1952
38.9 C (102.0 F)
1953
36.7 C (98.1 F)
1954
36.7 C (98.1 F)
1955
34.4 C (93.9 F)
1956
35.6 C (96.1 F)
1957
38.3 C (100.9 F)
1958
32.2 C (90.0 F)
1959
33.3 C (91.9 F)
1960
37.2 C (99.0 F)
1961
33.9 C (93.0 F)
1962
35.6 C (96.1 F)
1963
37.8 C (100.0 F)
1964
36.1 C (97.0 F)
1965
33.9 C (93.0 F)
1966
37.8 C (100.0 F)
1967
32.8 C (91.0 F)
1968
37.8 C (100.0 F)
1969
35.6 C (96.1 F)
1970
36.7 C (98.1 F)
1971
36.1 C (97.0 F)
1972
33.3 C (91.9 F)
1973
37.2 C (99.0 F)
1974
36.7 C (98.1 F)
1975
33.9 C (93.0 F)
1976
35.0 C (95.0 F)
1977
36.1 C (97.0 F)
1978
37.8 C (100.0 F)
1979
37.2 C (99.0 F)
1980
37.2 C (99.0 F)
1981
38.3 C (100.9 F)
1982
33.9 C (93.0 F)
1983
33.9 C (93.0 F)
1984
34.4 C (93.9 F)
1985
32.8 C (91.0 F)
1986
32.8 C (91.0 F)
1987
31.7 C (89.1 F)
1988
34.4 C (93.9 F)
1989
32.8 C (91.0 F)
1990
38.3 C (100.9 F)
1991
32.8 C (91.0 F)
1992
36.1 C (97.0 F)
1993
36.1 C (97.0 F)
1994
37.2 C (99.0 F)
1995
36.7 C (98.1 F)
1996
35.0 C (95.0 F)
1997
34.4 C (93.9 F)
1998
37.8 C (100.0 F)
1999
35.6 C (96.1 F)
2000
36.7 C (98.1 F)
2001
34.4 C (93.9 F)
2002
35.6 C (96.1 F)
2003
39.4 C (102.9 F)
2004
34.4 C (93.9 F)
2005
34.4 C (93.9 F)
2006
36.1 C (97.0 F)
2007
35.6 C (96.1 F)
2008
36.7 C (98.1 F)
2009
36.7 C (98.1 F)
2010
36.1 C (97.0 F)
2011
37.8 C (100.0 F)
2012
37.2 C (99.0 F)
2014
35.6 C (96.1 F)
Coldest night (TNn)
The coldest night of the year at Roy, 1905 to 2014. The record is -31.7 C (-25.1 F) in 1963, marked on the chart; the median year is -19.4 C (-2.9 F).
Coldest night (TNn) at Roy by year
Year
Coldest night (TNn)
1905
-5.0 C (23.0 F)
1909
n/a
1910
n/a
1911
n/a
1912
n/a
1913
-17.8 C (0.0 F)
1914
-13.3 C (8.1 F)
1915
-21.7 C (-7.1 F)
1916
-17.8 C (0.0 F)
1917
-18.3 C (-0.9 F)
1918
-24.4 C (-11.9 F)
1919
-28.3 C (-18.9 F)
1920
-15.6 C (3.9 F)
1921
-15.6 C (3.9 F)
1922
-23.3 C (-9.9 F)
1923
-21.7 C (-7.1 F)
1924
-25.0 C (-13.0 F)
1925
-18.9 C (-2.0 F)
1926
-18.9 C (-2.0 F)
1927
-21.1 C (-6.0 F)
1928
n/a
1929
n/a
1930
n/a
1931
n/a
1932
-11.1 C (12.0 F)
1933
-13.3 C (8.1 F)
1934
-14.4 C (6.1 F)
1935
-16.7 C (1.9 F)
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
-18.3 C (-0.9 F)
1950
-19.4 C (-2.9 F)
1951
-21.1 C (-6.0 F)
1952
-19.4 C (-2.9 F)
1953
-17.2 C (1.0 F)
1954
-15.0 C (5.0 F)
1955
-20.0 C (-4.0 F)
1956
-22.2 C (-8.0 F)
1957
-17.2 C (1.0 F)
1958
-16.1 C (3.0 F)
1959
-23.9 C (-11.0 F)
1960
-19.4 C (-2.9 F)
1961
-25.6 C (-14.1 F)
1962
-27.2 C (-17.0 F)
1963
-31.7 C (-25.1 F)
1964
-15.6 C (3.9 F)
1965
-18.3 C (-0.9 F)
1966
-22.2 C (-8.0 F)
1967
-20.0 C (-4.0 F)
1968
-16.1 C (3.0 F)
1969
-18.3 C (-0.9 F)
1970
-23.3 C (-9.9 F)
1971
-27.2 C (-17.0 F)
1972
-20.6 C (-5.1 F)
1973
-17.2 C (1.0 F)
1974
-26.7 C (-16.1 F)
1975
-23.9 C (-11.0 F)
1976
-26.1 C (-15.0 F)
1977
-15.6 C (3.9 F)
1978
-25.0 C (-13.0 F)
1979
-22.2 C (-8.0 F)
1980
-15.6 C (3.9 F)
1981
-23.9 C (-11.0 F)
1982
-26.1 C (-15.0 F)
1983
-23.3 C (-9.9 F)
1984
-23.3 C (-9.9 F)
1985
-22.2 C (-8.0 F)
1986
-21.7 C (-7.1 F)
1987
-20.0 C (-4.0 F)
1988
-17.8 C (0.0 F)
1989
-22.2 C (-8.0 F)
1990
-27.2 C (-17.0 F)
1991
-19.4 C (-2.9 F)
1992
-17.2 C (1.0 F)
1993
-16.1 C (3.0 F)
1994
-17.2 C (1.0 F)
1995
-17.2 C (1.0 F)
1996
-20.6 C (-5.1 F)
1997
-20.6 C (-5.1 F)
1998
-17.8 C (0.0 F)
1999
-10.6 C (12.9 F)
2000
-12.2 C (10.0 F)
2001
-18.9 C (-2.0 F)
2002
-17.8 C (0.0 F)
2003
-15.0 C (5.0 F)
2004
-23.3 C (-9.9 F)
2005
-23.9 C (-11.0 F)
2006
-17.2 C (1.0 F)
2007
-21.1 C (-6.0 F)
2008
-21.7 C (-7.1 F)
2009
-18.3 C (-0.9 F)
2010
-15.6 C (3.9 F)
2011
-28.3 C (-18.9 F)
2012
-12.8 C (9.0 F)
2014
-16.1 C (3.0 F)
Wettest day (Rx1day)
The wettest day of the year at Roy, 1905 to 2014. The record is 127.0 mm (5.0 in) in 1914, marked on the chart; the median year is 40.4 mm (1.6 in).
Wettest day (Rx1day) at Roy by year
Year
Wettest day (Rx1day)
1905
2.8 mm (0.11 in)
1909
103.1 mm (4.1 in)
1910
48.0 mm (1.9 in)
1911
38.4 mm (1.5 in)
1912
54.6 mm (2.1 in)
1913
29.7 mm (1.2 in)
1914
127.0 mm (5.0 in)
1915
67.1 mm (2.6 in)
1916
24.6 mm (1.0 in)
1917
28.7 mm (1.1 in)
1918
37.1 mm (1.5 in)
1919
53.8 mm (2.1 in)
1920
40.1 mm (1.6 in)
1921
50.8 mm (2.0 in)
1922
21.6 mm (0.9 in)
1923
59.9 mm (2.4 in)
1924
30.5 mm (1.2 in)
1925
34.3 mm (1.4 in)
1926
33.0 mm (1.3 in)
1927
39.1 mm (1.5 in)
1928
69.1 mm (2.7 in)
1929
69.9 mm (2.8 in)
1930
64.8 mm (2.6 in)
1931
26.7 mm (1.1 in)
1932
48.3 mm (1.9 in)
1933
41.9 mm (1.6 in)
1934
23.4 mm (0.9 in)
1935
40.6 mm (1.6 in)
1936
35.6 mm (1.4 in)
1937
43.2 mm (1.7 in)
1938
83.8 mm (3.3 in)
1939
47.0 mm (1.9 in)
1940
64.3 mm (2.5 in)
1941
110.0 mm (4.3 in)
1942
91.7 mm (3.6 in)
1943
34.3 mm (1.4 in)
1944
44.5 mm (1.8 in)
1945
39.4 mm (1.6 in)
1946
62.2 mm (2.4 in)
1947
31.8 mm (1.3 in)
1948
41.4 mm (1.6 in)
1949
57.2 mm (2.3 in)
1950
44.5 mm (1.8 in)
1951
59.7 mm (2.4 in)
1952
42.9 mm (1.7 in)
1953
27.9 mm (1.1 in)
1954
71.9 mm (2.8 in)
1955
77.0 mm (3.0 in)
1956
22.9 mm (0.9 in)
1957
27.2 mm (1.1 in)
1958
64.3 mm (2.5 in)
1959
33.3 mm (1.3 in)
1960
30.5 mm (1.2 in)
1961
33.0 mm (1.3 in)
1962
26.2 mm (1.0 in)
1963
46.0 mm (1.8 in)
1964
21.3 mm (0.8 in)
1965
76.7 mm (3.0 in)
1966
57.9 mm (2.3 in)
1967
49.5 mm (1.9 in)
1968
31.0 mm (1.2 in)
1969
44.7 mm (1.8 in)
1970
22.6 mm (0.9 in)
1971
39.6 mm (1.6 in)
1972
51.1 mm (2.0 in)
1973
21.6 mm (0.9 in)
1974
30.2 mm (1.2 in)
1975
29.7 mm (1.2 in)
1976
19.6 mm (0.8 in)
1977
35.6 mm (1.4 in)
1978
53.3 mm (2.1 in)
1979
66.0 mm (2.6 in)
1980
46.2 mm (1.8 in)
1981
32.8 mm (1.3 in)
1982
50.3 mm (2.0 in)
1983
35.8 mm (1.4 in)
1984
38.1 mm (1.5 in)
1985
41.9 mm (1.6 in)
1986
33.8 mm (1.3 in)
1987
49.5 mm (1.9 in)
1988
33.5 mm (1.3 in)
1989
48.8 mm (1.9 in)
1990
40.9 mm (1.6 in)
1991
58.9 mm (2.3 in)
1992
30.2 mm (1.2 in)
1993
32.5 mm (1.3 in)
1994
52.1 mm (2.1 in)
1995
44.5 mm (1.8 in)
1996
30.5 mm (1.2 in)
1997
31.8 mm (1.3 in)
1998
33.0 mm (1.3 in)
1999
55.9 mm (2.2 in)
2000
53.3 mm (2.1 in)
2001
25.4 mm (1.0 in)
2002
58.2 mm (2.3 in)
2003
16.5 mm (0.6 in)
2004
38.1 mm (1.5 in)
2005
50.8 mm (2.0 in)
2006
38.1 mm (1.5 in)
2007
36.3 mm (1.4 in)
2008
50.8 mm (2.0 in)
2009
20.3 mm (0.8 in)
2010
88.9 mm (3.5 in)
2011
36.8 mm (1.4 in)
2012
21.3 mm (0.8 in)
2014
25.1 mm (1.0 in)
Wettest five days (Rx5day)
The wettest five days of the year at Roy, 1905 to 2014. The record is 188.0 mm (7.4 in) in 1914, marked on the chart; the median year is 61.6 mm (2.4 in).
Wettest five days (Rx5day) at Roy by year
Year
Wettest five days (Rx5day)
1905
2.8 mm (0.11 in)
1909
128.8 mm (5.1 in)
1910
80.6 mm (3.2 in)
1911
69.6 mm (2.7 in)
1912
54.6 mm (2.1 in)
1913
53.9 mm (2.1 in)
1914
188.0 mm (7.4 in)
1915
95.3 mm (3.8 in)
1916
40.6 mm (1.6 in)
1917
53.6 mm (2.1 in)
1918
65.1 mm (2.6 in)
1919
58.9 mm (2.3 in)
1920
62.9 mm (2.5 in)
1921
96.5 mm (3.8 in)
1922
41.9 mm (1.6 in)
1923
126.0 mm (5.0 in)
1924
30.5 mm (1.2 in)
1925
59.7 mm (2.4 in)
1926
60.2 mm (2.4 in)
1927
99.0 mm (3.9 in)
1928
104.1 mm (4.1 in)
1929
100.9 mm (4.0 in)
1930
124.5 mm (4.9 in)
1931
67.1 mm (2.6 in)
1932
87.7 mm (3.5 in)
1933
41.9 mm (1.6 in)
1934
33.6 mm (1.3 in)
1935
104.1 mm (4.1 in)
1936
68.6 mm (2.7 in)
1937
106.7 mm (4.2 in)
1938
105.4 mm (4.1 in)
1939
54.6 mm (2.1 in)
1940
64.3 mm (2.5 in)
1941
151.9 mm (6.0 in)
1942
123.9 mm (4.9 in)
1943
40.7 mm (1.6 in)
1944
54.7 mm (2.2 in)
1945
61.1 mm (2.4 in)
1946
72.4 mm (2.9 in)
1947
62.3 mm (2.5 in)
1948
41.4 mm (1.6 in)
1949
62.3 mm (2.5 in)
1950
59.7 mm (2.4 in)
1951
88.9 mm (3.5 in)
1952
61.9 mm (2.4 in)
1953
27.9 mm (1.1 in)
1954
90.2 mm (3.6 in)
1955
82.9 mm (3.3 in)
1956
34.8 mm (1.4 in)
1957
51.0 mm (2.0 in)
1958
70.4 mm (2.8 in)
1959
47.6 mm (1.9 in)
1960
59.9 mm (2.4 in)
1961
47.3 mm (1.9 in)
1962
29.0 mm (1.1 in)
1963
61.9 mm (2.4 in)
1964
32.5 mm (1.3 in)
1965
157.0 mm (6.2 in)
1966
59.2 mm (2.3 in)
1967
60.7 mm (2.4 in)
1968
48.3 mm (1.9 in)
1969
69.9 mm (2.8 in)
1970
29.5 mm (1.2 in)
1971
88.4 mm (3.5 in)
1972
70.7 mm (2.8 in)
1973
32.5 mm (1.3 in)
1974
42.4 mm (1.7 in)
1975
40.4 mm (1.6 in)
1976
33.3 mm (1.3 in)
1977
73.4 mm (2.9 in)
1978
55.8 mm (2.2 in)
1979
73.6 mm (2.9 in)
1980
57.6 mm (2.3 in)
1981
35.3 mm (1.4 in)
1982
51.3 mm (2.0 in)
1983
36.3 mm (1.4 in)
1984
54.1 mm (2.1 in)
1985
48.3 mm (1.9 in)
1986
71.1 mm (2.8 in)
1987
68.8 mm (2.7 in)
1988
77.5 mm (3.1 in)
1989
61.2 mm (2.4 in)
1990
56.2 mm (2.2 in)
1991
81.8 mm (3.2 in)
1992
69.0 mm (2.7 in)
1993
49.7 mm (2.0 in)
1994
66.5 mm (2.6 in)
1995
80.6 mm (3.2 in)
1996
54.7 mm (2.2 in)
1997
75.0 mm (3.0 in)
1998
54.6 mm (2.1 in)
1999
113.0 mm (4.4 in)
2000
86.1 mm (3.4 in)
2001
35.8 mm (1.4 in)
2002
71.4 mm (2.8 in)
2003
30.7 mm (1.2 in)
2004
80.3 mm (3.2 in)
2005
77.7 mm (3.1 in)
2006
63.5 mm (2.5 in)
2007
40.7 mm (1.6 in)
2008
65.1 mm (2.6 in)
2009
52.1 mm (2.1 in)
2010
106.4 mm (4.2 in)
2011
52.1 mm (2.1 in)
2012
28.5 mm (1.1 in)
2014
38.5 mm (1.5 in)
Longest dry spell (CDD)
The longest dry spell of the year at Roy, 1905 to 2014. The record is 132 days in 1921, marked on the chart; the median year is 50 days.
Longest dry spell (CDD) at Roy by year
Year
Longest dry spell (CDD)
1905
23 days
1909
23 days
1910
51 days
1911
56 days
1912
63 days
1913
26 days
1914
54 days
1915
71 days
1916
70 days
1917
26 days
1918
63 days
1919
49 days
1920
86 days
1921
132 days
1922
57 days
1923
53 days
1924
53 days
1925
99 days
1926
67 days
1927
68 days
1928
36 days
1929
36 days
1930
64 days
1931
35 days
1932
47 days
1933
37 days
1934
57 days
1935
101 days
1936
110 days
1937
63 days
1938
73 days
1939
51 days
1940
39 days
1941
23 days
1942
57 days
1943
38 days
1944
31 days
1945
58 days
1946
32 days
1947
46 days
1948
62 days
1949
81 days
1950
60 days
1951
39 days
1952
49 days
1953
40 days
1954
64 days
1955
54 days
1956
73 days
1957
54 days
1958
30 days
1959
51 days
1960
45 days
1961
41 days
1962
32 days
1963
50 days
1964
23 days
1965
45 days
1966
72 days
1967
83 days
1968
41 days
1969
43 days
1970
38 days
1971
43 days
1972
122 days
1973
52 days
1974
26 days
1975
58 days
1976
40 days
1977
31 days
1978
32 days
1979
36 days
1980
38 days
1981
36 days
1982
29 days
1983
29 days
1984
43 days
1985
76 days
1986
47 days
1987
74 days
1988
54 days
1989
67 days
1990
43 days
1991
58 days
1992
80 days
1993
27 days
1994
29 days
1995
63 days
1996
74 days
1997
32 days
1998
66 days
1999
28 days
2000
61 days
2001
61 days
2002
65 days
2003
45 days
2004
35 days
2005
42 days
2006
108 days
2007
48 days
2008
43 days
2009
38 days
2010
56 days
2011
29 days
2012
53 days
2014
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
54 years with a frost
Across 54 years with a frost, the median last spring frost at Roy falls on 3 May and the median first autumn frost on 14 October, which leaves a median of 167 days between them.
Fitted over all years, the growing season changes by +1.6 days per decade at this station.
Frost dates and growing season at Roy
Measure
Median, all years
Earliest period
Recent period (1971 to 2011)
Recent against earliest
Fitted trend
Last spring frost
3 May
n/a
2 May
n/a
-1.0 days per decade
First autumn frost
14 October
n/a
17 October
n/a
+0.6 days per decade
Growing days
167 days
n/a
169 days
n/a
+1.6 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
92 years, 1910 to 2011
A day with at least 40.8 mm (1.6 in) of rain is expected about once in 2 years. A day with at least 117.6 mm (4.6 in) of rain is expected about once in 100 years.
Rainfall return levels at Roy: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
40.8 mm (1.6 in)
5 years
57.3 mm (2.3 in)
10 years
69.7 mm (2.7 in)
25 years
87.2 mm (3.4 in)
50 years
101.8 mm (4.0 in)
100 years
117.6 mm (4.6 in)
Longer than the 92 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, 92 years of values from 1910 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: 127.0 mm (5.0 in) in 1914; 110.0 mm (4.3 in) in 1941; 91.7 mm (3.6 in) in 1942.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Download the Data
Data for Roy standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Roy 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.