CASTLE ROCK, CO

Average of Minimum Temperature (Degrees Fahrenheit)

(051401)

File last updated on April 26, 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
189317.57a13.96 22.00a25.23 37.61 46.63 51.55 49.68 41.03 29.52 17.50 20.06 31.03
189411.53a6.70a23.39 28.87 40.40a44.40 49.10 49.48 41.47 30.81 21.85q-----z32.61b
1895-----z-----z-----z-----z36.83a43.63 46.58 49.26 40.20 28.87 14.70 11.61 33.96d
189616.81 16.14 18.03 29.55a38.71 47.60 50.48 48.94 38.50 25.65 14.50 13.48 29.87
18978.13 12.00 19.52b27.57 42.24n47.27 48.32 48.39 47.53 27.55 18.67f7.85k31.81c
1898-----z-----z15.65k28.97 36.58 46.97 50.32 51.35 38.73 26.32 14.73 2.45 32.94c
18999.61 -0.25 15.68 29.13 39.06 44.47 51.81 49.00 40.07 31.06 23.50 8.10 28.44
190014.87 10.71 22.81 26.10 40.77 47.40 49.19 47.19 43.10 32.97 22.03 16.48 31.14
190116.52 11.25 18.83a28.50 41.39 47.07a54.16 51.00a41.27 36.52 22.80 13.40a31.89
19028.84 17.57 19.61 30.32e40.52 47.33 48.55 50.55 39.67 33.00a23.47 14.65 31.17
190314.77 3.54 18.30a28.21a35.87 45.37 51.65 50.26 39.13 30.29 21.90 13.68 29.41
19049.32 21.00 23.29 28.87 38.55 42.66a47.48 49.03 40.48i-----z-----z-----z32.52d
1905-----z-----z-----z-----z-----z-----z-----z-----z43.28e24.63a22.90a6.29 24.28h
190611.97b12.43 14.38b30.43 38.23 43.47 48.77a48.81 42.33 27.57a20.69a20.03a29.92
190714.97 17.93 26.94 27.20 33.26 41.57b49.74h47.90 39.70 32.11d16.79a12.19 28.23a
190815.26 17.61a23.81 27.37 35.26 42.93 50.03 50.19 41.13 28.65 16.27 13.61 30.18
190920.35 15.11 20.60a24.47 34.06 46.20 52.13 51.06 40.53 -----z24.03 -0.13a29.86a
191013.43a9.07a24.55 -----z37.39 45.07 51.16 48.71 43.83 -----z24.31q15.16 32.04c
191119.71 13.18 23.50a28.90 39.71 47.73 50.53a46.94 44.17 31.91i-----z4.10a31.85b
19129.37a13.04a11.03a27.37 36.03 42.53 49.94 47.45 34.20 27.69b16.60 3.71 26.58
19137.94 4.29 18.86b27.87 37.24b-----z48.26 49.71 36.83 26.35 21.60 -0.94 25.27a
191413.81 8.67a19.87 29.40 40.20a46.73 52.16 48.57a41.47 31.45 21.00a4.50a29.82
19154.93a17.44c18.20a34.33 34.00a42.53 49.39 45.48 40.77 30.74 21.03 10.57a29.12
19166.07d15.14 24.03 27.03a34.53a43.73 52.48 48.32 38.77 30.23 16.52c5.53a28.53
19177.45 16.36 13.00a25.53 32.71 41.70 50.97 46.10 41.93 27.59b23.03 15.42g29.67a
19182.53a15.15b-----z-----z-----z55.75v-----z51.29q-----z-----z-----z-----z8.84j
1919-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z
1920-----z-----z-----z-----z-----z46.27 50.84 47.45 39.87 31.52 20.27 14.81 35.86e
192116.10 16.04 25.13a27.13 39.43a47.93 51.94 50.58 41.53 31.90a21.87 17.17a32.23
19226.74 13.11a17.13 27.62a37.55 47.57 51.39 52.84 41.63 27.74 19.00 17.48 29.98
192320.84 10.59a13.87 29.20 38.74 45.47 52.81 48.90 39.67 26.45 18.83 9.61 29.58
19245.06 20.28 10.81 27.40 29.23 43.73 58.03 55.90 51.00 29.77 20.50 2.40a29.51
19256.43a-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z6.43k
1926-----z-----z-----z29.76e38.58 45.13 48.42 47.32 39.80 29.71 22.13 9.55 34.49c
192716.97 17.79 18.03 28.70 35.06 45.93 49.55 47.19 38.48g28.84 25.50 4.26 28.89a
192812.61 12.54a20.35 23.97a38.35 42.57 47.39 46.03 37.83 30.35 18.77 7.87 28.22
19299.32 3.57 20.03 27.27 35.06 43.63 51.06 -----z-----z-----z-----z-----z27.14e
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-----z36.76m35.42 44.10 49.19 47.55 41.13 32.84 23.63 15.58 36.18d
19630.90 19.61 19.77 30.47 40.23 45.97 53.03 52.29 46.23 37.00 22.60 9.68 31.48
19649.81 6.10 14.94 27.93 37.16 44.07 52.58 48.42 40.63 29.00 21.77 17.13 29.13
196518.71 10.50 10.32 30.53 36.42 46.30 53.19 49.13 39.10a32.29 26.07 15.61 30.68
19668.39 7.18 22.26 27.77 38.90 45.70 55.81 49.94 44.70 33.03 27.13 16.55 31.45
196716.19 16.54 25.52 31.30 36.26 46.93 54.19 49.13 41.73 33.61 22.23 10.42 32.00
196813.26 16.90 20.71 23.50 36.77 48.20 53.10 50.61 39.97 32.87 18.80 12.90 30.63
196918.13 17.86 13.74 34.03 41.48 45.03 56.16 54.87 44.30 25.42 18.70 14.97 32.06
197012.32 19.75 17.65 26.20 38.23 47.33 53.26 52.71 40.00 26.90 22.67 19.58 31.38
197124.00t13.61 19.52 28.73 36.00 45.03 50.13 49.58 37.33 27.71 21.20 14.90 31.25a
197211.00a16.03 23.97 29.83 36.58 47.27 49.52 48.81 42.07a32.29 10.53 4.35 29.35
19734.77 11.39 21.65 25.38a35.61 43.93 50.84 49.35 39.67 32.00 22.63 13.61 29.24
19745.10 12.46 24.94 28.63 39.00 46.17 50.77 47.58 36.60 32.77 18.72a7.90 29.22
19759.63a12.81a21.23 27.64b36.61 45.10 53.26 48.71 38.60 31.93a15.20 16.35 29.76
197611.23 21.07 19.52 32.55a39.45 45.63 53.58 50.29 -----z27.42 19.97 14.23 30.45a
197711.13 18.21 20.42 31.48a42.24b49.93a54.45 52.07b46.17g32.07b22.72a19.95k33.47b
197811.48b16.24c26.14j32.61l38.80a49.79a54.78h50.00d43.97a32.47a22.07a10.13a30.55c
19792.77 17.25 26.03a30.34a38.71 46.17a53.30a50.29c44.83 32.97 14.33c16.41b31.12
198013.32i17.00j21.21g27.36e39.43c49.54d53.83h50.31b45.56u22.64q19.47 21.56o37.22g
198113.89c16.46 21.61 34.93a38.04d49.47 53.55b49.31b42.90a31.23 20.00b13.48 32.07
198211.10a9.54 24.07a25.07 36.81 43.89b51.87 53.59b45.70c27.33d18.70c14.52b30.18
198313.58g18.48a20.97 25.50h35.07a44.93 51.32 53.48 45.57 33.31b18.77d2.42g35.77c
198410.77 14.10 18.30a24.27 40.45 45.77 52.23 50.33a37.90 25.69b19.31a18.09h30.83a
19859.28f-----z-----z-----z-----z-----z-----z-----z-----z33.53l18.30 15.55b16.93j
198624.47a21.63a27.77e33.83a38.53a51.37c53.68 52.78d42.46d32.67a22.77d14.42 34.70
198715.28f20.41f22.57c32.13 42.71 50.53 53.39 51.63a43.21b33.16 24.48a16.55 37.04b
19889.93a18.24 21.06 31.67 40.53a50.93c53.55b53.83a41.53 34.94 23.80 15.74 32.98
198917.39 10.32 25.73a31.31a42.16 47.40 55.19 51.44m43.04d32.23a23.85d12.23 30.99a
199020.23 16.24c24.41b32.90 38.84f52.39g53.13 51.19e47.86a32.90a25.22c11.43a31.55b
199112.00a21.71 26.52 30.79a42.93a50.46f54.43c-----z-----z-----z-----z-----z31.40f
1992-----z-----z26.21c34.12d42.23 46.48a51.84 49.33a43.25b33.55 18.63 14.16 35.98b
199315.00 16.29 25.45 31.47 40.71 46.17 52.43a51.19 41.24a30.00 17.71b16.58 32.02
199416.47a15.82 25.00a31.73 42.97 50.79a52.61 54.26 45.30 33.60a24.77 20.26 34.46
199517.61 19.89 24.68 28.52a37.90 46.00 50.23 54.06 43.73 30.74 26.80 18.97a33.26
199612.58 18.04a19.70a31.67 41.87 48.30 54.52b52.19 42.33 33.65 23.83 20.04d33.23
199714.48 18.04 23.52 25.37 38.57a48.70 53.73a51.29 46.30 29.66b19.43 14.19 31.94
199815.42 19.78a17.48 27.70 39.29 43.36b55.72b51.50a47.40 33.90 28.70 16.71c33.08
199918.24f23.37a27.23 28.59a39.58s46.70g55.07a53.63a40.90 31.13 27.47 16.87a33.80c
200018.94 23.64a25.45b32.00 40.41b48.34a53.10a54.29 43.28a34.16 16.72a13.16 33.62
200116.48b17.36 23.74 33.03 40.03 49.57 56.13a-----z44.66a33.47a24.27 16.03 32.25a
200214.87 14.71 18.97 33.31a38.19 51.00 55.10 51.06 46.57 29.17a21.47 16.00a32.53
200320.18i14.89 24.67a33.47 39.93c46.70 56.07a54.40a40.97 36.16 22.04b17.71 35.18a
200416.38b16.07 27.84 32.66a40.07a46.24a50.67a48.57a43.47 34.39c23.55a17.77 33.14
200520.87 19.25 22.42 29.28a40.19 48.10a56.61 51.97 47.97 36.35 28.27 15.68 34.75
200622.77 16.81a26.29 34.03 43.03 53.27 58.21b56.06 41.63 34.45 27.40 17.97b35.99
20079.55 18.82 29.07b31.70 42.87 50.70 57.55 56.84 48.00 38.42 26.60 15.13 35.44
200813.58 19.46a24.42 29.20 39.19 47.63 56.55 54.52 44.43 34.68 26.93 16.10 33.89
200918.06 23.64 27.16 31.13 43.16 48.53 54.13a52.45 45.29b29.37a27.57 12.81 34.44
201016.97 15.39 25.81 33.37 40.42 51.70 56.57a56.93a47.57 38.23a25.93 21.23 35.84
201116.03 14.86 29.16 33.10 37.89c50.28a58.00 57.83a47.13 35.13 26.72a14.23 35.03
201221.60a18.03 31.84 37.03 43.16 54.61b57.40a55.15d46.56c34.03a28.93 17.26 37.13
201316.16 16.57 24.13a30.85q45.81o51.48c56.69b55.70a51.32b33.04c25.54b14.55 34.52b
201416.28b16.96c24.41d33.80 41.29c-----z57.15d52.88e47.30 35.23 22.38a22.78m34.77b
201519.32i23.74e27.73a34.63 40.45 53.77d55.57a56.07a50.67 41.61 26.65d-----z41.09b
201619.32f22.46a25.71 33.25b39.64c54.69d57.40a53.93b48.52a40.62b30.10 16.37a38.43a
201716.94 26.64 32.70a33.20 41.31b52.13 58.40a53.84 47.72a34.32 27.31d19.97 37.04
201820.19 18.19b28.39 33.43 46.07d53.77 58.71 54.97a49.27 34.55 23.77 18.24b36.63
201917.21c17.52a23.87 31.00g36.69e48.81d57.80a59.13a52.97 31.92e27.68h26.61c37.25b
202025.77 21.54a34.13 36.95j50.11c55.50 56.96d61.50g50.61b37.97 34.17 22.87 38.96b
202124.81 18.43 31.58 36.10 47.00 58.80 63.74 61.52 55.77 42.33a35.37 29.87 42.11
202223.03 18.96 30.63a39.53 46.42 58.43 64.71 -----z49.50 36.39 22.33 16.17a36.92a
202316.39 19.21 22.94 31.10 44.16 49.70 56.97 56.58 47.47 34.58 27.10 22.68 35.74
202414.29 23.69 26.48 -----z-----z-----z-----z-----z-----z-----z-----z-----z21.49i
Period of Record Statistics
MEAN13.77 15.80 22.50 30.00 39.06 47.45 53.20 51.24 43.31 31.94 22.23 13.95 32.06
S.D.5.38 4.99 4.87 3.20 3.27 3.56 3.40 3.18 4.04 3.63 4.36 5.59 2.84
SKEW-0.12 -0.75 -0.27 0.25 0.33 0.93 0.65 0.69 0.55 0.35 0.19 -0.42 0.90
MAX25.77 26.64 34.13 39.53 50.11 58.80 64.71 61.52 55.77 42.33 35.37 29.87 42.11
MIN0.90 -0.25 10.32 23.50 29.23 41.57 46.58 45.48 34.20 24.63 10.53 -0.94 26.58
YRS83 88 88 85 89 89 91 88 88 88 88 84 56