YELLOWSTONE PARK MAMMOTH, WY

Average of Minimum Temperature (Degrees Fahrenheit)

(489905)

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
18949.43a1.32 18.84 -----z-----z-----z54.35 55.16 46.55a34.47p27.10a11.10b27.98d
18959.24b9.29 13.90 29.50 33.94 37.33 43.87 44.29 35.00 28.26 17.76a12.52 26.24
189616.39 16.34 15.71 24.20 32.52 41.27 47.61 43.84 36.63c27.39 10.30c20.32 27.71
1897-----z11.79 10.58 27.57 39.13 41.40 45.68 46.39 40.00a30.65 21.14b11.28b29.60a
18986.32 15.93a9.93a28.63 34.35 41.73 46.00 46.81 36.70 26.23 15.62a8.52 26.40
189912.55 1.36 13.32 25.20 32.00 40.20 45.42 42.03 37.47 27.81 26.66a12.28b26.36
190015.46c9.68 22.94 31.50 37.32 46.87 44.55 44.61 36.17 31.33a18.62a17.29 29.69
190113.60a7.89 17.23 24.37 38.97 37.70 49.61 47.61 35.00a32.65 24.44e14.68c28.65
19029.17a17.57 15.61 25.60 35.68 40.23 43.45 41.87a36.03a31.90 21.07 13.00d27.60
190314.32 1.46 17.59b25.77 32.90 42.28a44.45 43.90 35.13 31.19 21.90 16.17a27.26
1904-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z
1905-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z
1906-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z
1907-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z
1908-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z
1909-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z
1910-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z
1911-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z
1912-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z
1913-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z
1914-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z
1915-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z
1916-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z
1917-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z
1918-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z
1919-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z
1920-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z
1921-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z
1922-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z
1923-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z
1924-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z
1925-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z
1926-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z
1927-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z
1928-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z
1929-----z-----z-----z-----z-----z-----z-----z-----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-----z42.70 48.00 47.32 35.00 28.58 21.80 16.70a34.30e
19428.42 6.21 14.87 30.37 31.37a36.53 45.84 44.55 36.37 28.26 18.47 16.37a26.47
1943-----z11.21 9.84 31.27 31.57a38.37 44.23 43.55 36.97 32.16 23.10 13.42 28.70a
194410.10 12.62 13.00 27.87 35.16 38.97 42.90 41.55 36.07 30.74 20.20 9.67a26.57
194514.42 13.54 18.55 22.00 32.70a36.50 45.26 44.97 36.27 31.67a20.70 12.06 27.39
194610.81 12.86 21.55 28.50 31.58 40.43 45.77 42.97 35.23 26.55 18.73 17.39 27.70
19476.48 11.07 16.77 24.00 33.65 38.13 45.58 42.74 36.90 33.16 12.90a11.97 26.11
19486.48 7.07 10.16 25.43 31.97 41.90 43.00 42.52 35.90a26.35 14.07 3.65 24.04
1949-7.03 7.15a15.13 26.66a36.00 39.34a45.29 45.48b36.70 26.13 27.70 12.97 25.96
19503.23 17.19a14.23 23.23 26.87 38.87 43.35 42.29 36.37 34.13 21.87 20.06 26.81
19516.77 15.15a11.61 24.00e34.65 35.17 45.42 44.16 34.43 28.32 17.87 8.16 25.48
195210.77 11.34 11.65 26.20 31.97 38.52a43.87 44.87 37.80 29.55 13.90 14.97a26.28
195322.61 13.82 19.61 22.67 30.19 39.55a-----z45.13 38.77 31.16 26.69a12.53a27.52a
195412.63a18.61 13.29 27.80 33.74 37.48e46.63a42.48 36.67 26.65 24.80 11.23 27.67
19556.65 5.75 8.00 24.43 33.03 38.57 46.55 46.74 36.57 29.39 13.23 12.74 25.14
195613.26 4.93a15.32 24.90 35.90 41.27 44.27a41.23 36.20 29.58 12.53 13.45 26.07
1957-0.58 15.89 17.71 25.00 37.10 40.90 46.23 44.10 35.33 28.97 15.33 17.84 26.98
195812.77 21.14 16.48 25.53 38.17a41.23 44.03 44.81 37.63 29.16 19.33 17.35 28.97
195912.29 8.32 16.26 24.50 29.77a41.33 42.77 41.45 34.73 27.10 13.70 11.81 25.34
196010.19 5.10 16.68 23.53 31.61 39.07 46.19 43.16 37.57 30.03a20.57 12.74 26.37
196112.14b21.86 20.75c23.65d34.39 43.37 46.45 47.26 33.40 27.29 18.34a10.10a28.25
19621.23a13.21 15.00 27.87 36.31b41.20 43.94 42.84 35.17 31.16 24.10 16.15d27.35
1963-2.46c19.86 18.52 25.87 35.30a40.89b45.73a44.20a43.38a34.45 24.71b11.53a28.50
196411.37a8.75a13.10 27.20 37.55 41.04b46.20a40.81d32.73d27.58 16.93 8.39c25.97
196513.11c11.00a-0.79g26.35d30.57a39.10 43.16 44.71 30.38f30.20a23.83 14.24b27.63b
19669.86b7.28c15.48 20.79b30.56f38.04c45.86b41.70a-----z-----z-----z-----z25.57e
1967-----z12.83j18.32c21.96f31.68 39.27 47.81 44.90 41.37 31.93b20.97a6.40a31.40c
196810.00 17.10 22.07a22.56c32.48 41.40 45.97a42.58 38.13 31.87 20.17 12.29 28.05
196911.74 15.33a11.71 26.93 34.26 39.41a46.71 48.57a41.00 24.97 20.57 14.50e27.98
197011.39 18.00c7.16 20.20 34.77 43.40 49.39 48.19 34.72a25.45 20.27 12.96c27.16
197112.81 13.07 13.93d25.07c-----z42.43 44.48 50.23 35.50b29.00b19.17a7.67a26.67a
19728.55 14.93 24.52 28.10 34.84 44.10 44.90 47.87 36.97a29.33d21.70 6.48 28.52
19739.65 14.50 20.10 23.70 33.19 42.27 47.32 47.90 37.47 31.48 -----z13.19e29.16a
19748.73a14.96a18.70a27.50 32.65 43.60 48.68 42.94 32.83 30.65 21.03 10.68f29.30a
19757.90b7.85a13.81 18.93 32.42 39.13 50.68 44.00 35.47 32.32 17.37 18.68 26.55
197614.19 15.76 13.19 28.50 35.23a37.59c47.39 40.58 35.75f26.94 24.38a13.26 27.00a
19776.39 14.62d15.96d26.00d-----z-----z-----z-----z-----z31.10k-----z15.04g15.74h
1978-----z-----z-----z29.89c34.19j40.03 47.06 44.94 39.97 30.62j11.92f-4.82i40.38g
1979-3.17b13.04 16.90 27.23 33.97a40.86a47.90 46.97a40.00c31.46c11.97a16.47a26.97
19804.03a15.29a15.79g28.00c37.88f42.29b48.40a43.17a39.67c28.46e20.35d19.84 28.95b
198117.81 12.44c22.50c29.00d37.56f41.21f-----z-----z-----z26.68l25.33i13.41i20.44h
19826.27i10.12d20.16 20.50f31.79l40.69a49.29 49.17a38.64p-----z16.54b14.38e28.62e
198317.61c18.70a23.64c24.69a32.38e41.39b47.03b-----z37.92f-----z23.34a4.85e25.96c
198412.03a13.83 22.50a26.00a34.12f40.68b49.71 49.42 -----z-----z20.79b-----z29.37d
19856.57a4.89a15.61 29.32b37.48j42.86b49.97 -----z36.12e27.92e10.21a9.83a23.33b
198617.48b18.11a29.00 29.53 33.78d46.17 46.37a46.04c35.82b29.63d17.36e10.37a29.97
19879.04c15.93 20.52 29.17a37.17a43.31a46.81 44.00a37.73 28.65 22.70 10.61 28.80
19886.52 11.38 17.29 28.73 36.55 48.47 49.06 45.03b37.97 33.48 20.80 10.13 28.78
198910.45 0.86 18.29 27.04b35.03 42.13 51.47a46.42 37.03 31.48 22.63 10.13 27.75
199015.39 10.50 20.74 29.30 34.35 42.79a48.39 48.03 42.13 29.32 22.73 -0.90 28.57
19919.63a21.59a20.13 27.67 34.84 42.77 48.39 49.71 39.14a26.52 16.03 13.57a29.16
199213.23 21.00 26.13 31.07 38.35 43.57 44.58 44.61 37.70 32.32 17.07 7.00 29.72
19937.60a7.15b21.29 28.27 36.84 40.53 41.69b43.23 35.14a28.71 13.64b13.93a26.50
199419.35 9.60c21.97 27.03 39.20a43.03a46.14b48.04d40.03a30.77a11.90 17.19d29.52
199512.39 18.18 19.29 26.97a33.21c41.14a48.35 47.00 39.03a26.55 23.00 14.35 29.12
19968.38b12.89b16.13 28.13 32.86b43.33 49.43a46.70a36.54b27.74 20.87 14.00a28.08
19978.07a11.57 19.87a20.90 35.32 42.11b46.69b45.55b40.03a29.45 18.03a9.43a27.25
199815.19 15.96a18.42 26.73 34.65 37.27 50.19 48.63a43.27 28.58 24.73 10.19 29.49
199916.00 14.64 17.19 21.40 32.45 40.67 45.84 47.55 34.03 30.06 26.50 14.74 28.42
200013.10 18.31 19.52 27.23 35.13a42.17a47.57a48.07d36.86a30.19 8.90a9.03 28.01
20018.17b6.74a19.57a26.23 35.20a42.21a49.40a43.78d42.07c29.38b24.70 9.74 28.10
20028.63a7.46 9.43a23.50b30.34b42.53 48.71 40.53a39.07a22.30a17.13 14.60a25.35
200315.94 7.68 18.38b27.77 34.42 40.53 50.58 49.14c35.11b29.82c-----z13.23a29.33a
20048.90b11.10 23.32 26.77 32.87 39.87 45.94 43.29 36.63c32.68 21.50 19.23a28.51
200515.42 13.39 21.52 28.60 35.80a41.90 51.45 46.90 40.07a33.90 21.37 11.74 30.17
200618.58 -----z20.48 29.61b36.03 44.87 52.42 45.67a39.08d28.52 22.45a14.29 32.00a
20076.26 17.57 26.32 29.23 36.20a44.24i55.19 48.07b40.37 30.68 21.63 12.03 29.41a
20088.35 15.31 15.39 18.73 37.19j41.27 48.55 48.55 36.87 30.83a26.17 8.58 27.15a
200911.00a14.96 15.94 27.37 35.55 42.13 46.74 47.26 41.37 23.68 22.90 6.87a27.98
201014.10 15.18 21.84 25.60 30.67a42.00c47.19e47.52 40.50 35.00 17.20 14.97 29.31
201113.03 5.57 21.81 24.63 33.94 41.07 49.58 48.61 41.10 34.39 18.20 11.23 28.60
201216.42 12.93 25.45 30.87 34.23 42.20 51.61 48.52 41.07 28.45 25.03 15.68 31.04
20139.87 14.57 18.03 23.53 37.16 43.60 52.10 50.68 44.23 26.97 21.83 8.71 29.27
201414.35 7.22a18.29 27.62a37.06 42.03 51.77 48.23 41.10 33.84 17.93 17.13 29.72
201514.00 19.82 23.74 27.63 37.26 48.33 50.16 48.52 43.20 36.81 16.57 14.32 31.70
201617.68 19.97 23.29 33.20 36.58 47.23 49.77 48.10 42.83 35.00 27.60 5.81 32.25
20174.94 17.75 28.93b29.37 35.32 43.86a51.48 47.35 39.03 27.00b20.46d11.00c29.71
201816.87 6.63a18.29 25.07b38.13 42.70 47.90 44.61 38.30 29.52 17.93 12.00 28.16
201912.94 -0.89 9.05j27.36b33.29 42.23 49.48b48.23 42.80 20.03 19.93 15.68 28.28a
202017.03 11.59 19.39 24.43 35.19 43.23 45.86b49.39 38.53 26.10 18.13 13.74 28.55
202113.23a4.21 18.17a23.00 33.00a46.67 52.19 47.42 38.90 31.48 24.09g17.40a29.61a
20228.61 6.14 18.42 19.55a32.55 38.97 45.13 49.10 41.10 29.94 9.47 9.68 25.72
202310.42 8.07 11.35 21.00f37.16 40.93 46.73a48.17a40.23 28.03a20.37 17.00 28.04a
20249.58 16.69 15.95j-----z-----z-----z-----z-----z-----z-----z-----z-----z13.14j
Period of Record Statistics
MEAN10.73 12.17 17.76 26.28 34.36 41.33 47.28 45.75 38.02 29.59 19.70 12.57 27.85
S.D.5.01 5.26 4.53 2.93 2.40 2.54 2.75 2.76 2.82 2.90 4.39 3.87 1.61
SKEW-0.79 -0.33 0.03 -0.42 -0.21 0.37 0.47 0.24 0.56 -0.27 -0.43 -0.48 0.24
MAX22.61 21.86 29.00 33.20 39.20 48.47 55.19 55.16 46.55 36.81 27.70 20.32 32.25
MIN-7.03 -0.89 7.16 18.73 26.87 35.17 41.69 40.53 32.73 20.03 8.90 -0.90 24.04
YRS88 90 88 88 81 89 90 89 85 85 86 87 66