Record envelope, standing records and threshold days for Sterling (USC00057950), Colorado, United States, with 116 years of record.
Key Facts for Sterling
Sterling (USC00057950) is a weather station in Colorado, United States at 40.63 latitude and -103.21 longitude, 1,211 m (3,974 ft) above sea level.
The station reports from 1895 to 2010, 116 years of record.
1,464 records set at Sterling still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Sterling set a daily record low maximum temperature of 18.3 C (64.9 F) on 7 July 2010.
About the Station
Location: Colorado, United States, 40.63 latitude, -103.21 longitude.
Elevation: 1,211 m (3,974 ft).
Period of record: 1895 to 2010, 116 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 Sterling. 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 Sterling, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
21.7 C (71.1 F)
-33.9 C (-29.0 F)
n/a
n/a
Feb
25.0 C (77.0 F)
-34.4 C (-29.9 F)
n/a
n/a
Mar
30.0 C (86.0 F)
-29.4 C (-20.9 F)
n/a
n/a
Apr
33.3 C (91.9 F)
-19.4 C (-2.9 F)
n/a
n/a
May
38.9 C (102.0 F)
-5.6 C (21.9 F)
n/a
n/a
Jun
43.3 C (109.9 F)
-1.7 C (28.9 F)
n/a
n/a
Jul
42.2 C (108.0 F)
1.7 C (35.1 F)
n/a
n/a
Aug
40.6 C (105.1 F)
0.0 C (32.0 F)
n/a
n/a
Sep
39.4 C (102.9 F)
-10.0 C (14.0 F)
n/a
n/a
Oct
36.1 C (97.0 F)
-21.1 C (-6.0 F)
n/a
n/a
Nov
30.0 C (86.0 F)
-25.0 C (-13.0 F)
n/a
n/a
Dec
23.3 C (73.9 F)
-37.2 C (-35.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Sterling still stand. 1910 holds the most, with 36.
Standing records at Sterling by the year they were set
Year set
Standing records
1909
4
1910
36
1911
10
1912
14
1913
32
1914
8
1915
13
1916
29
1917
15
1918
33
1919
18
1920
10
1921
19
1922
12
1923
14
1924
28
1925
12
1926
3
1927
13
1928
7
1929
15
1930
11
1931
26
1932
21
1933
16
1934
17
1935
5
1936
18
1937
20
1938
10
1939
9
1940
11
1941
6
1942
15
1943
8
1944
8
1945
11
1946
15
1947
9
1948
15
1949
8
1950
23
1951
25
1952
19
1953
10
1954
16
1955
16
1956
10
1957
10
1958
7
1959
13
1960
16
1961
6
1962
25
1963
14
1964
15
1965
21
1966
11
1967
11
1968
9
1969
16
1970
8
1971
9
1972
18
1973
9
1974
9
1975
17
1976
16
1977
18
1978
6
1979
10
1980
15
1981
11
1982
11
1983
16
1984
8
1985
23
1986
9
1987
20
1988
12
1989
25
1990
27
1991
15
1992
7
1993
9
1994
13
1995
19
1996
12
1997
16
1998
13
1999
17
2000
10
2001
1
2002
16
2003
20
2004
17
2005
19
2006
20
2007
20
2008
12
2009
10
2010
4
All-Time Record Progression
7 new records
7 all-time records were set at Sterling between 24 June 1954 and 28 June 1990. Each dot is a new record.
When Sterling set new all-time records
Date
Kind
Detail
1954-06-24
Record high maximum temperature
Record high maximum temperature 41.1 C (106.0 F)
1968-08-15
Record daily precipitation
Record daily precipitation 124.0 mm (4.9 in)
1976-07-10
Record high maximum temperature
Record high maximum temperature 41.7 C (107.1 F)
1983-11-27
Record daily snowfall
Record daily snowfall 45.7 cm (18.0 in)
1989-12-22
Record low minimum temperature
Record low minimum temperature -37.2 C (-35.0 F)
1990-06-26
Record high maximum temperature
Record high maximum temperature 42.8 C (109.0 F)
1990-06-28
Record high maximum temperature
Record high maximum temperature 43.3 C (109.9 F)
Wettest Day of Each Month
Aug: 124.0 mm (4.9 in)
The wettest day on record for each calendar month at Sterling. The most was 124.0 mm (4.9 in) on 15 August 1968.
Record daily precipitation for each month at Sterling
Month
Record daily precipitation (mm)
Date
Jan
30.7 mm (1.2 in)
8 January 1939
Feb
19.3 mm (0.8 in)
28 February 1918
Mar
44.5 mm (1.8 in)
19 March 1984
Apr
54.4 mm (2.1 in)
23 April 1929
May
78.0 mm (3.1 in)
29 May 1975
Jun
79.0 mm (3.1 in)
4 June 1985
Jul
65.0 mm (2.6 in)
27 July 1963
Aug
124.0 mm (4.9 in)
15 August 1968
Sep
49.3 mm (1.9 in)
1 September 1992
Oct
48.5 mm (1.9 in)
15 October 1916
Nov
47.5 mm (1.9 in)
4 November 1922
Dec
27.2 mm (1.1 in)
21 December 2006
Period of Record Coverage
1909 to 2010
Complete yearUnder 90 percent of days
102 years of record at Sterling, 1909 to 2010. 7 years have data for under 90 percent of days and are left out of rankings: 1909, 1918, 1985, 1995, 2003, 2005, 2010.
Cooler than the station meanWarmer than the station mean
One stripe for each of 85 complete years at Sterling, 1910 to 2009. Blue stripes are years cooler than the station's own mean of 9.5 C (49.1 F); red stripes are warmer. The coolest year was 1924, at 7.1 C (44.7 F), and the warmest was 1934, at 11.7 C (53.0 F). The strongest colour marks a difference of 2.4 C (4.3 F).
Annual mean temperature at Sterling as warming stripes, 1910 to 2009
Year
Annual mean temperature
Difference from the station mean
1910
10.3 C
+0.79 C
1911
9.5 C
-0.03 C
1912
7.8 C
-1.68 C
1913
7.7 C
-1.74 C
1914
9.5 C
-0.02 C
1915
8.7 C
-0.77 C
1916
8.5 C
-1.01 C
1917
9.4 C
-0.10 C
1919
8.3 C
-1.20 C
1920
8.6 C
-0.93 C
1921
9.9 C
+0.41 C
1922
8.6 C
-0.93 C
1923
8.1 C
-1.41 C
1924
7.1 C
-2.40 C
1926
9.4 C
-0.04 C
1927
9.3 C
-0.22 C
1928
8.8 C
-0.69 C
1930
9.5 C
+0.00 C
1931
11.0 C
+1.50 C
1932
9.4 C
-0.11 C
1933
10.6 C
+1.15 C
1934
11.7 C
+2.20 C
1935
9.9 C
+0.37 C
1936
9.3 C
-0.21 C
1937
8.3 C
-1.20 C
1938
10.0 C
+0.49 C
1939
9.8 C
+0.31 C
1940
9.6 C
+0.15 C
1941
9.7 C
+0.20 C
1942
8.4 C
-1.10 C
1943
9.9 C
+0.39 C
1944
8.6 C
-0.84 C
1945
8.6 C
-0.92 C
1947
9.2 C
-0.27 C
1948
9.0 C
-0.45 C
1949
8.6 C
-0.88 C
1950
9.0 C
-0.48 C
1951
8.1 C
-1.38 C
1952
9.2 C
-0.26 C
1953
10.4 C
+0.94 C
1954
10.7 C
+1.22 C
1955
9.0 C
-0.53 C
1956
9.1 C
-0.36 C
1957
9.1 C
-0.42 C
1958
9.3 C
-0.17 C
1959
9.1 C
-0.35 C
1960
8.8 C
-0.72 C
1961
8.8 C
-0.66 C
1962
9.2 C
-0.27 C
1963
10.3 C
+0.84 C
1964
9.2 C
-0.28 C
1965
8.8 C
-0.73 C
1966
8.8 C
-0.70 C
1967
9.3 C
-0.20 C
1968
9.1 C
-0.35 C
1969
9.7 C
+0.18 C
1970
9.5 C
+0.05 C
1971
9.2 C
-0.33 C
1972
8.8 C
-0.71 C
1973
8.9 C
-0.54 C
1974
9.6 C
+0.15 C
1976
10.2 C
+0.74 C
1977
10.8 C
+1.29 C
1979
8.6 C
-0.89 C
1980
9.6 C
+0.08 C
1981
10.0 C
+0.52 C
1984
9.0 C
-0.45 C
1986
10.1 C
+0.64 C
1987
10.8 C
+1.31 C
1988
10.4 C
+0.91 C
1989
10.2 C
+0.68 C
1990
10.3 C
+0.81 C
1991
10.8 C
+1.35 C
1992
10.1 C
+0.59 C
1993
8.9 C
-0.56 C
1994
11.4 C
+1.88 C
1996
9.9 C
+0.42 C
1997
10.0 C
+0.49 C
1998
10.7 C
+1.25 C
2000
10.8 C
+1.36 C
2002
10.5 C
+1.06 C
2006
11.4 C
+1.91 C
2007
10.4 C
+0.91 C
2008
10.0 C
+0.48 C
2009
9.9 C
+0.41 C
The annual mean temperature here has risen by 0.2 C (0.1 to 0.2) per decade over 1910 to 2009. In Fahrenheit: 0.3 F (0.2 to 0.4) per decade. The slope is a straight line fitted to 85 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Sterling
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.2 C (0.1 to 0.2) per decade
0.3 F (0.2 to 0.4) per decade
1910 to 2009
85
Rise
Mean daily maximum
0.08 C (-0.01 to 0.17) per decade
0.14 F (-0.01 to 0.30) per decade
1910 to 2009
85
Not clearly different from zero
Mean daily minimum
0.2 C (0.2 to 0.3) per decade
0.4 F (0.3 to 0.5) per decade
1910 to 2009
85
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
1895 to 2010
Yearly extremes at Sterling: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
43.3 C (109.9 F)
1990
38.9 C (102.0 F)
102
Coldest night (TNn)
-37.2 C (-35.0 F)
1989
-26.7 C (-16.1 F)
102
Wettest day (Rx1day)
124.0 mm (4.9 in)
1968
39.0 mm (1.5 in)
104
Wettest five days (Rx5day)
134.7 mm (5.3 in)
1968
60.2 mm (2.4 in)
104
Longest dry spell (CDD)
78 days
1999
40 days
104
Hottest day (TXx)
The hottest day of the year at Sterling, 1895 to 2010. The record is 43.3 C (109.9 F) in 1990, marked on the chart; the median year is 38.9 C (102.0 F).
Hottest day (TXx) at Sterling by year
Year
Hottest day (TXx)
1895
n/a
1896
n/a
1909
18.3 C (64.9 F)
1910
37.8 C (100.0 F)
1911
36.7 C (98.1 F)
1912
36.1 C (97.0 F)
1913
37.8 C (100.0 F)
1914
37.8 C (100.0 F)
1915
35.0 C (95.0 F)
1916
37.8 C (100.0 F)
1917
39.4 C (102.9 F)
1918
37.2 C (99.0 F)
1919
38.9 C (102.0 F)
1920
36.7 C (98.1 F)
1921
36.1 C (97.0 F)
1922
38.9 C (102.0 F)
1923
35.6 C (96.1 F)
1924
38.3 C (100.9 F)
1925
37.8 C (100.0 F)
1926
37.8 C (100.0 F)
1927
36.7 C (98.1 F)
1928
35.6 C (96.1 F)
1929
37.2 C (99.0 F)
1930
37.2 C (99.0 F)
1931
40.0 C (104.0 F)
1932
37.8 C (100.0 F)
1933
39.4 C (102.9 F)
1934
40.6 C (105.1 F)
1935
38.9 C (102.0 F)
1936
40.0 C (104.0 F)
1937
40.0 C (104.0 F)
1938
40.0 C (104.0 F)
1939
39.4 C (102.9 F)
1940
39.4 C (102.9 F)
1941
34.4 C (93.9 F)
1942
36.7 C (98.1 F)
1943
36.7 C (98.1 F)
1944
37.2 C (99.0 F)
1945
35.0 C (95.0 F)
1946
37.8 C (100.0 F)
1947
38.3 C (100.9 F)
1948
37.8 C (100.0 F)
1949
37.2 C (99.0 F)
1950
35.6 C (96.1 F)
1951
35.6 C (96.1 F)
1952
39.4 C (102.9 F)
1953
38.9 C (102.0 F)
1954
41.1 C (106.0 F)
1955
38.3 C (100.9 F)
1956
38.3 C (100.9 F)
1957
36.7 C (98.1 F)
1958
37.8 C (100.0 F)
1959
38.9 C (102.0 F)
1960
40.6 C (105.1 F)
1961
38.9 C (102.0 F)
1962
38.3 C (100.9 F)
1963
40.6 C (105.1 F)
1964
40.6 C (105.1 F)
1965
36.7 C (98.1 F)
1966
37.2 C (99.0 F)
1967
38.9 C (102.0 F)
1968
41.1 C (106.0 F)
1969
39.4 C (102.9 F)
1970
40.0 C (104.0 F)
1971
38.3 C (100.9 F)
1972
37.8 C (100.0 F)
1973
40.0 C (104.0 F)
1974
40.0 C (104.0 F)
1975
38.3 C (100.9 F)
1976
41.7 C (107.1 F)
1977
40.6 C (105.1 F)
1978
38.9 C (102.0 F)
1979
39.4 C (102.9 F)
1980
40.0 C (104.0 F)
1981
38.9 C (102.0 F)
1982
40.6 C (105.1 F)
1983
36.1 C (97.0 F)
1984
36.7 C (98.1 F)
1985
39.4 C (102.9 F)
1986
37.2 C (99.0 F)
1987
40.6 C (105.1 F)
1988
40.6 C (105.1 F)
1989
41.1 C (106.0 F)
1990
43.3 C (109.9 F)
1991
40.0 C (104.0 F)
1992
37.8 C (100.0 F)
1993
39.4 C (102.9 F)
1994
40.0 C (104.0 F)
1995
41.1 C (106.0 F)
1996
38.9 C (102.0 F)
1997
38.9 C (102.0 F)
1998
40.6 C (105.1 F)
1999
38.9 C (102.0 F)
2000
40.0 C (104.0 F)
2001
40.0 C (104.0 F)
2002
41.1 C (106.0 F)
2003
41.7 C (107.1 F)
2004
39.4 C (102.9 F)
2005
41.1 C (106.0 F)
2006
41.7 C (107.1 F)
2007
39.4 C (102.9 F)
2008
39.4 C (102.9 F)
2009
37.2 C (99.0 F)
2010
41.1 C (106.0 F)
Coldest night (TNn)
The coldest night of the year at Sterling, 1895 to 2010. The record is -37.2 C (-35.0 F) in 1989, marked on the chart; the median year is -26.7 C (-16.1 F).
Coldest night (TNn) at Sterling by year
Year
Coldest night (TNn)
1895
n/a
1896
n/a
1909
-26.7 C (-16.1 F)
1910
-23.3 C (-9.9 F)
1911
-28.3 C (-18.9 F)
1912
-32.2 C (-26.0 F)
1913
-30.0 C (-22.0 F)
1914
-27.8 C (-18.0 F)
1915
-25.0 C (-13.0 F)
1916
-28.9 C (-20.0 F)
1917
-28.9 C (-20.0 F)
1918
-29.4 C (-20.9 F)
1919
-36.1 C (-33.0 F)
1920
-26.7 C (-16.1 F)
1921
-22.2 C (-8.0 F)
1922
-28.9 C (-20.0 F)
1923
-31.7 C (-25.1 F)
1924
-35.6 C (-32.1 F)
1925
-25.0 C (-13.0 F)
1926
-26.1 C (-15.0 F)
1927
-27.8 C (-18.0 F)
1928
-27.2 C (-17.0 F)
1929
-28.9 C (-20.0 F)
1930
-33.9 C (-29.0 F)
1931
-19.4 C (-2.9 F)
1932
-31.7 C (-25.1 F)
1933
-31.7 C (-25.1 F)
1934
-25.6 C (-14.1 F)
1935
-29.4 C (-20.9 F)
1936
-33.9 C (-29.0 F)
1937
-31.1 C (-24.0 F)
1938
-22.2 C (-8.0 F)
1939
-23.9 C (-11.0 F)
1940
-29.4 C (-20.9 F)
1941
-22.8 C (-9.0 F)
1942
-33.9 C (-29.0 F)
1943
-28.3 C (-18.9 F)
1944
-20.6 C (-5.1 F)
1945
-22.8 C (-9.0 F)
1946
-22.2 C (-8.0 F)
1947
-21.1 C (-6.0 F)
1948
-31.1 C (-24.0 F)
1949
-27.2 C (-17.0 F)
1950
-29.4 C (-20.9 F)
1951
-33.9 C (-29.0 F)
1952
-23.3 C (-9.9 F)
1953
-20.6 C (-5.1 F)
1954
-23.3 C (-9.9 F)
1955
-25.0 C (-13.0 F)
1956
-25.0 C (-13.0 F)
1957
-24.4 C (-11.9 F)
1958
-21.1 C (-6.0 F)
1959
-28.9 C (-20.0 F)
1960
-29.4 C (-20.9 F)
1961
-25.6 C (-14.1 F)
1962
-29.4 C (-20.9 F)
1963
-28.9 C (-20.0 F)
1964
-25.6 C (-14.1 F)
1965
-23.9 C (-11.0 F)
1966
-30.0 C (-22.0 F)
1967
-24.4 C (-11.9 F)
1968
-27.2 C (-17.0 F)
1969
-24.4 C (-11.9 F)
1970
-21.1 C (-6.0 F)
1971
-27.8 C (-18.0 F)
1972
-28.9 C (-20.0 F)
1973
-22.2 C (-8.0 F)
1974
-27.2 C (-17.0 F)
1975
-21.1 C (-6.0 F)
1976
-23.3 C (-9.9 F)
1977
-25.0 C (-13.0 F)
1978
-27.8 C (-18.0 F)
1979
-27.2 C (-17.0 F)
1980
-23.9 C (-11.0 F)
1981
-27.2 C (-17.0 F)
1982
-34.4 C (-29.9 F)
1983
-31.7 C (-25.1 F)
1984
-32.2 C (-26.0 F)
1985
-28.9 C (-20.0 F)
1986
-26.1 C (-15.0 F)
1987
-23.3 C (-9.9 F)
1988
-27.2 C (-17.0 F)
1989
-37.2 C (-35.0 F)
1990
-31.1 C (-24.0 F)
1991
-19.4 C (-2.9 F)
1992
-22.8 C (-9.0 F)
1993
-26.7 C (-16.1 F)
1994
-26.1 C (-15.0 F)
1995
-25.6 C (-14.1 F)
1996
-28.9 C (-20.0 F)
1997
-25.6 C (-14.1 F)
1998
-30.6 C (-23.1 F)
1999
-13.3 C (8.1 F)
2000
-22.2 C (-8.0 F)
2001
-21.1 C (-6.0 F)
2002
-26.1 C (-15.0 F)
2003
-21.7 C (-7.1 F)
2004
-25.0 C (-13.0 F)
2005
-25.6 C (-14.1 F)
2006
-24.4 C (-11.9 F)
2007
-24.4 C (-11.9 F)
2008
-26.1 C (-15.0 F)
2009
-27.2 C (-17.0 F)
2010
-25.0 C (-13.0 F)
Wettest day (Rx1day)
The wettest day of the year at Sterling, 1895 to 2010. The record is 124.0 mm (4.9 in) in 1968, marked on the chart; the median year is 39.0 mm (1.5 in).
Wettest day (Rx1day) at Sterling by year
Year
Wettest day (Rx1day)
1895
29.0 mm (1.1 in)
1896
0.0 mm (0.00 in)
1909
9.9 mm (0.39 in)
1910
33.8 mm (1.3 in)
1911
43.2 mm (1.7 in)
1912
37.6 mm (1.5 in)
1913
54.9 mm (2.2 in)
1914
20.3 mm (0.8 in)
1915
38.1 mm (1.5 in)
1916
48.5 mm (1.9 in)
1917
49.5 mm (1.9 in)
1918
62.0 mm (2.4 in)
1919
31.8 mm (1.3 in)
1920
27.7 mm (1.1 in)
1921
54.6 mm (2.1 in)
1922
51.8 mm (2.0 in)
1923
43.2 mm (1.7 in)
1924
39.1 mm (1.5 in)
1925
35.1 mm (1.4 in)
1926
36.1 mm (1.4 in)
1927
46.2 mm (1.8 in)
1928
53.8 mm (2.1 in)
1929
54.4 mm (2.1 in)
1930
50.8 mm (2.0 in)
1931
24.4 mm (1.0 in)
1932
22.1 mm (0.9 in)
1933
49.5 mm (1.9 in)
1934
55.4 mm (2.2 in)
1935
30.5 mm (1.2 in)
1936
71.1 mm (2.8 in)
1937
23.6 mm (0.9 in)
1938
48.5 mm (1.9 in)
1939
30.7 mm (1.2 in)
1940
71.4 mm (2.8 in)
1941
30.2 mm (1.2 in)
1942
46.0 mm (1.8 in)
1943
31.8 mm (1.3 in)
1944
30.0 mm (1.2 in)
1945
26.9 mm (1.1 in)
1946
39.4 mm (1.6 in)
1947
30.2 mm (1.2 in)
1948
28.2 mm (1.1 in)
1949
59.4 mm (2.3 in)
1950
22.1 mm (0.9 in)
1951
31.0 mm (1.2 in)
1952
24.4 mm (1.0 in)
1953
34.0 mm (1.3 in)
1954
24.4 mm (1.0 in)
1955
47.0 mm (1.9 in)
1956
52.1 mm (2.1 in)
1957
29.7 mm (1.2 in)
1958
38.9 mm (1.5 in)
1959
33.3 mm (1.3 in)
1960
62.0 mm (2.4 in)
1961
34.8 mm (1.4 in)
1962
50.8 mm (2.0 in)
1963
65.0 mm (2.6 in)
1964
21.1 mm (0.8 in)
1965
40.6 mm (1.6 in)
1966
48.3 mm (1.9 in)
1967
45.7 mm (1.8 in)
1968
124.0 mm (4.9 in)
1969
34.8 mm (1.4 in)
1970
31.2 mm (1.2 in)
1971
33.5 mm (1.3 in)
1972
39.9 mm (1.6 in)
1973
38.9 mm (1.5 in)
1974
52.3 mm (2.1 in)
1975
78.0 mm (3.1 in)
1976
38.9 mm (1.5 in)
1977
39.4 mm (1.6 in)
1978
49.0 mm (1.9 in)
1979
41.7 mm (1.6 in)
1980
53.3 mm (2.1 in)
1981
49.0 mm (1.9 in)
1982
34.8 mm (1.4 in)
1983
33.8 mm (1.3 in)
1984
44.5 mm (1.8 in)
1985
79.0 mm (3.1 in)
1986
38.1 mm (1.5 in)
1987
45.0 mm (1.8 in)
1988
50.8 mm (2.0 in)
1989
39.9 mm (1.6 in)
1990
48.3 mm (1.9 in)
1991
20.6 mm (0.8 in)
1992
49.3 mm (1.9 in)
1993
33.5 mm (1.3 in)
1994
24.6 mm (1.0 in)
1995
44.5 mm (1.8 in)
1996
44.2 mm (1.7 in)
1997
61.0 mm (2.4 in)
1998
53.3 mm (2.1 in)
1999
48.8 mm (1.9 in)
2000
35.6 mm (1.4 in)
2001
29.2 mm (1.1 in)
2002
22.9 mm (0.9 in)
2003
38.1 mm (1.5 in)
2004
30.5 mm (1.2 in)
2005
29.2 mm (1.1 in)
2006
36.8 mm (1.4 in)
2007
46.2 mm (1.8 in)
2008
54.6 mm (2.1 in)
2009
38.1 mm (1.5 in)
2010
32.5 mm (1.3 in)
Wettest five days (Rx5day)
The wettest five days of the year at Sterling, 1895 to 2010. The record is 134.7 mm (5.3 in) in 1968, marked on the chart; the median year is 60.2 mm (2.4 in).
Wettest five days (Rx5day) at Sterling by year
Year
Wettest five days (Rx5day)
1895
29.0 mm (1.1 in)
1896
0.0 mm (0.00 in)
1909
4.9 mm (0.19 in)
1910
34.1 mm (1.3 in)
1911
48.2 mm (1.9 in)
1912
69.4 mm (2.7 in)
1913
59.0 mm (2.3 in)
1914
39.6 mm (1.6 in)
1915
74.2 mm (2.9 in)
1916
52.3 mm (2.1 in)
1917
61.8 mm (2.4 in)
1918
79.5 mm (3.1 in)
1919
36.9 mm (1.5 in)
1920
46.7 mm (1.8 in)
1921
24.6 mm (1.0 in)
1922
133.1 mm (5.2 in)
1923
46.0 mm (1.8 in)
1924
70.9 mm (2.8 in)
1925
37.2 mm (1.5 in)
1926
46.5 mm (1.8 in)
1927
67.8 mm (2.7 in)
1928
74.3 mm (2.9 in)
1929
101.2 mm (4.0 in)
1930
73.7 mm (2.9 in)
1931
36.6 mm (1.4 in)
1932
45.7 mm (1.8 in)
1933
57.8 mm (2.3 in)
1934
61.0 mm (2.4 in)
1935
71.2 mm (2.8 in)
1936
102.9 mm (4.1 in)
1937
43.2 mm (1.7 in)
1938
67.5 mm (2.7 in)
1939
33.0 mm (1.3 in)
1940
85.9 mm (3.4 in)
1941
56.5 mm (2.2 in)
1942
114.1 mm (4.5 in)
1943
58.0 mm (2.3 in)
1944
33.0 mm (1.3 in)
1945
60.7 mm (2.4 in)
1946
45.5 mm (1.8 in)
1947
42.9 mm (1.7 in)
1948
48.5 mm (1.9 in)
1949
83.8 mm (3.3 in)
1950
32.0 mm (1.3 in)
1951
41.2 mm (1.6 in)
1952
50.0 mm (2.0 in)
1953
61.0 mm (2.4 in)
1954
28.0 mm (1.1 in)
1955
70.3 mm (2.8 in)
1956
77.8 mm (3.1 in)
1957
75.7 mm (3.0 in)
1958
59.9 mm (2.4 in)
1959
60.5 mm (2.4 in)
1960
88.2 mm (3.5 in)
1961
46.5 mm (1.8 in)
1962
76.1 mm (3.0 in)
1963
71.6 mm (2.8 in)
1964
44.7 mm (1.8 in)
1965
47.6 mm (1.9 in)
1966
62.3 mm (2.5 in)
1967
72.7 mm (2.9 in)
1968
134.7 mm (5.3 in)
1969
69.4 mm (2.7 in)
1970
47.7 mm (1.9 in)
1971
48.5 mm (1.9 in)
1972
47.0 mm (1.9 in)
1973
58.7 mm (2.3 in)
1974
58.4 mm (2.3 in)
1975
92.8 mm (3.7 in)
1976
66.0 mm (2.6 in)
1977
63.2 mm (2.5 in)
1978
50.3 mm (2.0 in)
1979
76.7 mm (3.0 in)
1980
71.1 mm (2.8 in)
1981
94.0 mm (3.7 in)
1982
56.4 mm (2.2 in)
1983
48.5 mm (1.9 in)
1984
82.6 mm (3.3 in)
1985
80.3 mm (3.2 in)
1986
62.8 mm (2.5 in)
1987
66.1 mm (2.6 in)
1988
104.6 mm (4.1 in)
1989
68.3 mm (2.7 in)
1990
48.3 mm (1.9 in)
1991
31.0 mm (1.2 in)
1992
102.9 mm (4.1 in)
1993
33.8 mm (1.3 in)
1994
62.4 mm (2.5 in)
1995
85.2 mm (3.4 in)
1996
50.7 mm (2.0 in)
1997
74.9 mm (2.9 in)
1998
95.3 mm (3.8 in)
1999
78.8 mm (3.1 in)
2000
38.1 mm (1.5 in)
2001
40.7 mm (1.6 in)
2002
28.4 mm (1.1 in)
2003
58.4 mm (2.3 in)
2004
31.7 mm (1.2 in)
2005
52.1 mm (2.1 in)
2006
37.1 mm (1.5 in)
2007
83.1 mm (3.3 in)
2008
70.4 mm (2.8 in)
2009
63.2 mm (2.5 in)
2010
66.8 mm (2.6 in)
Longest dry spell (CDD)
The longest dry spell of the year at Sterling, 1895 to 2010. The record is 78 days in 1999, marked on the chart; the median year is 40 days.
Longest dry spell (CDD) at Sterling by year
Year
Longest dry spell (CDD)
1895
39 days
1896
29 days
1909
20 days
1910
50 days
1911
38 days
1912
28 days
1913
40 days
1914
52 days
1915
60 days
1916
32 days
1917
39 days
1918
30 days
1919
30 days
1920
21 days
1921
22 days
1922
50 days
1923
38 days
1924
35 days
1925
71 days
1926
27 days
1927
41 days
1928
40 days
1929
39 days
1930
42 days
1931
51 days
1932
40 days
1933
38 days
1934
66 days
1935
48 days
1936
48 days
1937
40 days
1938
49 days
1939
74 days
1940
34 days
1941
54 days
1942
47 days
1943
54 days
1944
34 days
1945
33 days
1946
51 days
1947
53 days
1948
32 days
1949
62 days
1950
37 days
1951
31 days
1952
29 days
1953
45 days
1954
75 days
1955
45 days
1956
55 days
1957
64 days
1958
32 days
1959
61 days
1960
45 days
1961
61 days
1962
70 days
1963
36 days
1964
61 days
1965
52 days
1966
57 days
1967
37 days
1968
36 days
1969
34 days
1970
48 days
1971
38 days
1972
42 days
1973
34 days
1974
50 days
1975
34 days
1976
50 days
1977
57 days
1978
52 days
1979
36 days
1980
61 days
1981
36 days
1982
24 days
1983
63 days
1984
34 days
1985
19 days
1986
27 days
1987
26 days
1988
57 days
1989
54 days
1990
45 days
1991
31 days
1992
41 days
1993
24 days
1994
34 days
1995
30 days
1996
43 days
1997
59 days
1998
40 days
1999
78 days
2000
27 days
2001
70 days
2002
55 days
2003
37 days
2004
28 days
2005
41 days
2006
35 days
2007
30 days
2008
35 days
2009
23 days
2010
36 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
85 years with a frost
Across 85 years with a frost, the median last spring frost at Sterling falls on 10 May and the median first autumn frost on 30 September, which leaves a median of 142 days between them.
In 1969 to 2009 the median growing season was 152 days. That is 13 days more than in 1910 to 1942.
Fitted over all years, the growing season changes by +2.6 days per decade at this station.
Frost dates and growing season at Sterling
Measure
Median, all years
Earliest period (1910 to 1942)
Recent period (1969 to 2009)
Recent against earliest
Fitted trend
Last spring frost
10 May
13 May
4 May
9 days earlier
-1.1 days per decade
First autumn frost
30 September
26 September
4 October
8 days later
+1.5 days per decade
Growing days
142 days
139 days
152 days
13 days more
+2.6 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
90 years, 1910 to 2009
A day with at least 39.3 mm (1.5 in) of rain is expected about once in 2 years. A day with at least 87.0 mm (3.4 in) of rain is expected about once in 100 years.
Rainfall return levels at Sterling: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
39.3 mm (1.5 in)
5 years
51.9 mm (2.0 in)
10 years
60.3 mm (2.4 in)
25 years
71.0 mm (2.8 in)
50 years
79.0 mm (3.1 in)
100 years
87.0 mm (3.4 in)
Longer than the 90 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, 90 years of values from 1910 to 2009.
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: 124.0 mm (4.9 in) in 1968; 78.0 mm (3.1 in) in 1975; 71.4 mm (2.8 in) in 1940.
Station Changes
1 suspected
One change was suspected in the annual mean temperature of Sterling, at 1987. Each is measured against neighbouring stations.
Relative to 5 neighbouring stations, the station's annual mean temperature from 1987 ran 0.4 C (0.8 F) higher than in the years before (likely change).
Suspected changes in the annual mean temperature at Sterling, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
1987
+0.4
+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.
Download the Data
Data for Sterling standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Sterling 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.