CASTLE ROCK, CO

Minimum of Minimum Temperature (Degrees Fahrenheit)

(051401)

File last updated on March 29, 2024
a = 1 day missing, b = 2 days missing, c = 3 days, ..etc..,
z = 26 or more days missing, A = Accumulations present
Long-term means based on columns; thus, the monthly row may not
sum (or average) to the long-term annual value.
MAXIMUM ALLOWABLE NUMBER OF MISSING DAYS : 5
Individual Months not used for annual or monthly statistics if more than 5 days are missing.
Individual Years not used for annual statistics if any month in that year has more than 5 days missing.

YEAR(S)JANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDECANN
1893-3.00a-2.00 9.00a5.00 25.00 31.00 46.00 43.00 29.00 10.00 -0.00 -1.00 -3.00b
1894-11.00a-14.00a3.00 11.00 30.00a34.00 44.00 35.00 30.00 13.00 13.00q-----z-----z
1895-----z-----z-----z-----z25.00a32.00 30.00 40.00 22.00 13.00 -0.00 -12.00 -----z
1896-6.00 -2.00 -5.00 7.00a28.00 40.00 43.00 36.00 20.00 17.00 -13.00 5.00 -13.00a
1897-21.00 -3.00 2.00b-0.00 36.00n32.00 37.00 42.00 32.00 9.00 5.00f-12.00k-----z
1898-----z-----z-6.00k11.00 23.00 35.00 43.00 42.00 28.00 10.00 -8.00 -22.00 -----z
1899-11.00 -32.00 -11.00 2.00 31.00 33.00 45.00 38.00 27.00 16.00 13.00 -14.00 -32.00
1900-9.00 -18.00 7.00 -3.00 28.00 40.00 38.00 35.00 26.00 8.00 8.00 -29.00 -29.00
1901-22.00 -11.00 -0.00a-4.00 32.00 41.00a49.00 45.00a27.00 25.00 12.00 -17.00a-22.00d
1902-23.00 -10.00 -5.00 14.00e30.00 38.00 36.00 41.00 26.00 21.00a2.00 -8.00 -23.00f
1903-0.00 -19.00 -8.00a6.00a26.00 34.00 32.00 40.00 26.00 4.00 -5.00 -7.00 -19.00b
1904-10.00 -3.00 1.00 14.00 28.00 35.00a40.00 37.00 35.00i-----z-----z-----z-----z
1905-----z-----z-----z-----z-----z-----z-----z-----z30.00e2.00a2.00a-12.00 -----z
1906-16.00b-5.00 -20.00b16.00 29.00 32.00 36.00a41.00 31.00 12.00a-9.00a-0.00a-20.00h
1907-4.00 -0.00 6.00 7.00 7.00 31.00b43.00h40.00 27.00 23.00d3.00a-12.00 -12.00o
1908-12.00 -6.00a5.00 9.00 17.00 34.00 42.00 39.00 13.00 8.00 -8.00 -13.00 -13.00a
1909-7.00 -6.00 -3.00a-8.00 17.00 38.00 44.00 40.00 28.00 -----z-6.00 -28.00a-----z
1910-10.00a-17.00a3.00 -----z20.00 30.00 43.00 34.00 33.00 -----z13.00q-6.00 -----z
1911-31.00 -15.00 6.00a15.00 23.00 36.00 40.00a36.00 31.00 9.00i-----z-18.00a-----z
1912-17.00a-15.00a-11.00a12.00 18.00 31.00 42.00 40.00 20.00 19.00b-5.00 -20.00 -20.00e
1913-37.00 -18.00 -19.00b8.00 22.00b-----z40.00 42.00 23.00 -5.00 4.00 -19.00 -----z
1914-9.00 -17.00a-12.00 14.00 29.00a39.00 44.00 41.00a25.00 18.00 2.00a-17.00a-17.00e
1915-19.00a2.00c-1.00a20.00 16.00a28.00 43.00 38.00 30.00 21.00 -8.00 -13.00a-19.00g
1916-22.00d-19.00 3.00 6.00a12.00a32.00 44.00 40.00 26.00 7.00 -14.00c-19.00a-22.00j
1917-16.00 -14.00 -12.00a6.00 16.00 29.00 42.00 35.00 32.00 12.00b5.00 -11.00g-16.00j
1918-22.00a-14.00b-----z-----z-----z43.00v-----z46.00q-----z-----z-----z-----z-----z
1919-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z
1920-----z-----z-----z-----z-----z36.00 43.00 38.00 28.00 4.00 2.00 -9.00 -----z
1921-7.00 -3.00 7.00a11.00 26.00a37.00 41.00 41.00 30.00 22.00a2.00 -7.00a-7.00d
1922-18.00 -16.00a-16.00 -1.00a25.00 34.00 45.00 48.00 33.00 18.00 -12.00 3.00 -18.00b
19232.00 -13.00a-16.00 18.00 27.00 39.00 46.00 40.00 31.00 4.00 -2.00 -28.00 -28.00a
1924-15.00 5.00 -12.00 8.00 20.00 25.00 46.00 43.00 38.00 19.00 4.00 -27.00a-27.00a
1925-11.00a-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z
1926-----z-----z-----z19.00e28.00 36.00 42.00 41.00 17.00 3.00 2.00 -22.00 -----z
19272.00 -9.00 -20.00 13.00 19.00 38.00 43.00 40.00 27.00g23.00 -5.00 -25.00 -25.00g
1928-18.00 -5.00a-6.00 -8.00a29.00 35.00 39.00 40.00 29.00 11.00 -9.00 -5.00 -18.00b
1929-14.00 -27.00 -4.00 8.00 23.00 35.00 39.00 -----z-----z-----z-----z-----z-----z
1930-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z
1931-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z
1932-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z
1933-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z
1934-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z
1935-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z
1936-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z
1937-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z
1938-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z
1939-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z
1940-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z
1941-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z
1942-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z
1943-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z
1944-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z
1945-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z
1946-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z
1947-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z
1948-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z
1949-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z
1950-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z
1951-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z
1952-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z
1953-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z
1954-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z
1955-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z
1956-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z
1957-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z
1958-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z
1959-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z
1960-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z
1961-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z
1962-----z-----z-----z30.00m21.00 34.00 39.00 39.00 30.00 25.00 6.00 -12.00 -----z
1963-35.00 -12.00 -9.00 17.00 31.00 38.00 46.00 46.00 36.00 26.00 8.00 -15.00 -35.00
1964-18.00 -11.00 -7.00 15.00 21.00 35.00 46.00 35.00 29.00 15.00 7.00 -10.00 -18.00
1965-1.00 -12.00 -14.00 19.00 22.00 36.00 48.00 41.00 22.00a26.00 12.00 -4.00 -14.00a
1966-16.00 -15.00 -2.00 9.00 25.00 38.00 49.00 41.00 31.00 17.00 1.00 -7.00 -16.00
1967-10.00 -2.00 -5.00 20.00 20.00 38.00 49.00 42.00 32.00 14.00 -6.00 -14.00 -14.00
1968-12.00 4.00 3.00 -0.00 26.00 38.00 44.00 39.00 28.00 13.00 -4.00 -16.00 -16.00
1969-4.00 5.00 -10.00 24.00 31.00 34.00 49.00 45.00 34.00 -2.00 -1.00 -12.00 -12.00
1970-18.00 10.00 -3.00 7.00 18.00 34.00 46.00 45.00 24.00 15.00 -0.00 4.00 -18.00
197118.00t-7.00 -4.00 13.00 28.00 36.00 40.00 43.00 15.00 4.00 -1.00 -8.00 -8.00t
1972-25.00a-6.00 -3.00 20.00 20.00 41.00 41.00 35.00 31.00a8.00 -5.00 -26.00 -26.00b
1973-15.00 -4.00 5.00 4.00a21.00 30.00 41.00 42.00 27.00 19.00 6.00 -13.00 -15.00a
1974-22.00 -15.00 6.00 11.00 28.00 30.00 44.00 41.00 26.00 21.00 -4.00a-9.00 -22.00a
1975-22.00a-11.00a-6.00 -7.00b25.00 28.00 48.00 38.00 24.00 15.00a-14.00 -4.00 -22.00e
1976-16.00 -1.00 -6.00 23.00a25.00 31.00 49.00 45.00 -----z4.00 -18.00 -2.00 -----z
1977-14.00 -2.00 6.00 17.00a32.00b41.00a46.00 37.00b33.00g18.00b-0.00a2.00k-----z
1978-6.00b-1.00c12.00j20.00l19.00a35.00a45.00h38.00d25.00a19.00a1.00a-23.00a-----z
1979-19.00 -3.00 12.00a5.00a25.00 32.00a48.00a41.00c29.00 7.00 -10.00c-3.00b-19.00l
1980-2.00i-10.00j4.00g10.00e31.00c34.00d48.00h42.00b39.00u13.00q-1.00 10.00o-----z
19818.00c-18.00 5.00 15.00a28.00d36.00 46.00b43.00b33.00a9.00 4.00b-10.00 -18.00o
1982-15.00a-29.00 11.00a12.00 23.00 32.00b43.00 48.00b39.00c19.00d-2.00c-12.00b-29.00r
1983-0.00g2.00a7.00 -4.00h22.00a32.00 40.00 49.00 24.00 25.00b-7.00d-24.00g-----z
1984-22.00 -3.00 -10.00a8.00 25.00 36.00 45.00 41.00a11.00 11.00b1.00a-1.00h-22.00m
1985-15.00f-----z-----z-----z-----z-----z-----z-----z-----z24.00l-4.00 -10.00b-----z
198611.00a-8.00a15.00e18.00a30.00a37.00c49.00 47.00d31.00d16.00a4.00d-6.00 -8.00y
1987-6.00f4.00f-0.00c10.00 34.00 41.00 42.00 43.00a35.00b23.00 6.00a-4.00 -6.00s
1988-8.00a6.00 4.00 14.00 22.00a34.00c47.00b45.00a27.00 27.00 8.00 -6.00 -8.00h
1989-2.00 -25.00 -9.00a4.00a30.00 37.00 50.00 44.00m31.00d13.00a8.00d-18.00 -25.00x
19907.00 -6.00c8.00b23.00 27.00f32.00g42.00 47.00e39.00a18.00a6.00c-26.00a-----z
1991-4.00a8.00 12.00 12.00a27.00a42.00f50.00c-----z-----z-----z-----z-----z-----z
1992-----z-----z5.00c19.00d33.00 34.00a45.00 35.00a30.00b17.00 -1.00 -2.00 -----z
1993-6.00 -10.00 3.00 18.00 23.00 38.00 42.00a43.00 21.00a-3.00 -10.00b-7.00 -10.00d
1994-13.00a-4.00 5.00a13.00 31.00 39.00a41.00 47.00 23.00 16.00a5.00 -2.00 -13.00d
1995-6.00 -8.00 2.00 8.00a26.00 37.00 42.00 45.00 26.00 18.00 8.00 2.00a-8.00b
1996-12.00 -16.00a-4.00a19.00 32.00 37.00 50.00b45.00 20.00 14.00 4.00 -15.00d-16.00h
1997-12.00 3.00 6.00 -2.00 28.00a42.00 47.00a45.00 37.00 6.00b-5.00 -1.00 -12.00d
19982.00 8.00a-8.00 21.00 26.00 32.00b51.00b44.00a36.00 22.00 9.00 -12.00c-12.00i
1999-0.00f4.00a12.00 4.00a25.00s36.00g47.00a46.00a23.00 12.00 3.00 -1.00a-----z
2000-0.00 7.00a15.00b10.00 24.00b37.00a41.00a48.00 23.00a25.00 -3.00a-1.00 -3.00i
20013.00b-15.00 9.00 16.00 19.00 34.00 50.00a-----z29.00a21.00a-4.00 4.00 -----z
2002-8.00 -8.00 -11.00 18.00a25.00 38.00 50.00 42.00 35.00 13.00a6.00 2.00a-11.00c
20038.00i-12.00 5.00a19.00 25.00c35.00 50.00a49.00a27.00 21.00 -9.00b1.00 -12.00q
2004-7.00b-14.00 18.00 21.00a20.00a34.00a45.00a37.00a30.00 21.00c-5.00a-12.00 -14.00k
2005-8.00 8.00 4.00 11.00a28.00 34.00a49.00 36.00 34.00 26.00 8.00 -12.00 -12.00b
20066.00 -14.00a12.00 23.00 21.00 46.00 50.00b44.00 29.00 16.00 -7.00 -3.00b-14.00e
2007-10.00 -14.00 7.00b19.00 32.00 33.00 51.00 50.00 34.00 14.00 3.00 -7.00 -14.00b
2008-10.00 1.00a5.00 16.00 22.00 34.00 50.00 46.00 39.00 19.00 12.00 -11.00 -11.00a
2009-3.00 10.00 9.00 9.00 38.00 37.00 47.00a44.00 32.00b13.00a3.00 -15.00 -15.00d
2010-7.00 1.00 11.00 21.00 26.00 39.00 47.00a47.00a40.00 20.00a3.00 -1.00 -7.00c
2011-8.00 -16.00 13.00 16.00 27.00c42.00a50.00 53.00a38.00 12.00 8.00a-9.00 -16.00f
2012-1.00a3.00 11.00 27.00 33.00 41.00b53.00a46.00d38.00c21.00a11.00 -2.00 -2.00l
2013-7.00 5.00 -4.00a16.00q35.00o37.00c50.00b49.00a30.00b23.00c10.00b-15.00 -----z
2014-6.00b-17.00c7.00d16.00 25.00c-----z52.00d46.00e31.00 28.00 -7.00a-3.00m-----z
2015-1.00i4.00e-1.00a24.00 23.00 45.00d49.00a44.00a43.00 27.00 5.00d-----z-----z
2016-10.00f-4.00a9.00 14.00b19.00c46.00d50.00a46.00b39.00a25.00b11.00 -8.00a-10.00w
2017-6.00 5.00 12.00a16.00 30.00b45.00 51.00a50.00 31.00a16.00 11.00d-3.00 -6.00i
2018-0.00 -5.00b13.00 23.00 31.00d43.00 52.00 45.00a36.00 11.00 6.00 3.00b-5.00i
2019-2.00c-6.00a-3.00 12.00g21.00e41.00d50.00a53.00a42.00 5.00e10.00h7.00c-----z
202013.00 -2.00a23.00 11.00j40.00c39.00 45.00d53.00g34.00b6.00 19.00 10.00 -----z
202111.00 -5.00 19.00 16.00 36.00 43.00 55.00 57.00 43.00 30.00a18.00 10.00 -5.00a
20222.00 -5.00 -1.00a23.00 34.00 40.00 57.00 -----z39.00 19.00 7.00 -14.00a-----z
2023-5.00 -7.00 10.00 6.00 36.00 41.00 46.00 48.00 37.00 4.00 11.00 2.00 -7.00
2024-18.00 6.00 14.00i-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z
Period of Record Statistics
MEAN-9.80 -6.81 1.03 12.04 25.54 36.08 45.15 42.49 29.66 15.11 1.00 -9.29 -16.00
S.D.9.87 9.23 9.44 7.89 5.72 4.21 4.81 4.62 6.45 7.71 7.56 9.14 7.71
SKEW-0.13 -0.27 -0.22 -0.57 -0.21 0.15 -0.40 0.39 -0.30 -0.38 -0.13 -0.18 -0.70
MAX13.00 10.00 23.00 27.00 40.00 46.00 57.00 57.00 43.00 30.00 19.00 10.00 -3.00
MIN-37.00 -32.00 -20.00 -8.00 7.00 25.00 30.00 34.00 11.00 -5.00 -18.00 -29.00 -35.00
YRS83 88 87 85 89 89 91 88 88 88 88 84 35