YELLOWSTONE PARK MAMMOTH, WY

Average of Average Temperature (Degrees Fahrenheit)

(489905)

File last updated on April 19, 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
189417.91b12.16 27.18 -----z-----z-----z66.44 68.23 54.54b45.00q36.05b19.80d37.79d
189517.85d19.20 21.39v-----z46.69r51.12 60.05 61.53 50.05 43.42 24.98b19.02 38.58c
189625.05 25.28 25.05 34.28 41.66 56.25 62.42 60.40 49.02d41.50 19.24e27.60 38.98
1897-----z20.50 19.48 37.87 54.03 53.82 60.24 62.47 54.82b40.90 29.88d19.15d41.20a
189814.73 25.81b20.76b40.53 45.02 55.16h62.11 63.00 51.92 36.03 25.07b17.19 36.56a
189920.44 10.80 23.06 35.73 42.40 53.00 61.39 56.97 54.62 37.48 36.02b18.81d37.56
190022.00f15.54o35.21e41.97 50.53 61.97 61.19 60.61 49.95 43.00b29.73b24.56 45.87b
190121.38a18.04 27.65a35.28a52.23 50.79b67.37 63.13 46.89c45.55 35.04f21.26h42.83b
190217.72b26.68 25.31b36.62 48.65a54.34a58.21 59.69b51.52b44.19 29.19a21.54d39.47
190322.60 13.46a28.41c36.88a44.79 56.91b59.72b61.27a49.72a45.29 31.73 25.10b39.66
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-----z55.05 62.34 60.60 46.42 40.18 30.37 24.57b45.65e
194218.79 18.04 27.41b43.05a43.47a51.30 63.90a62.13a53.10a42.43a28.20 24.55a39.70
1943-----z24.13a23.03 44.13 44.26b51.88 62.84 61.69 55.00 45.56 33.78 23.87a42.74a
194420.47 22.72 24.58 39.18 49.10 52.05 59.71 59.61 52.52 46.66 29.38 20.83a39.73
194524.06 24.02 29.40 33.30 45.98a49.12 62.39 62.35 50.08 46.62a29.15 20.58 39.75
194620.90 23.48 32.73 42.38a44.50 56.17 64.05 60.77 49.58 33.65 27.07 23.92 39.93
194714.93a21.38 27.84 35.35 47.40 48.85 62.87 58.27 50.58 43.97 22.07a19.82 37.78
194816.61 17.14a21.55b35.40a45.63a53.95 58.90a58.81 51.45a42.08 21.83 12.47 36.32
19493.73 16.57a26.53 40.33a49.35 54.50a62.79 64.03b52.95 36.48 38.20 21.31 38.90
195013.03 26.72a25.44 35.87 41.95 54.18 59.74 59.50 50.50 45.24 30.28 28.05 39.21
195116.66 25.72a23.81 37.32e48.32 48.25 62.26 59.18 49.97 38.23 27.45 17.02 37.85
195219.29 21.93 23.50 41.15 46.76 54.90a60.84 60.68 54.92f47.39 25.87 23.78a38.73a
195329.60 23.52 31.15 34.07 42.52 54.47a-----z62.75a56.35 46.47 36.40a21.70a39.91a
195421.87a29.22a24.94 39.63 48.34 50.28e65.12a60.24 53.77 40.97 35.73 21.56 40.97
195517.03 16.84 20.16 35.10 46.63 53.20 62.85 64.87 51.80 43.63 22.87 22.05 38.09
195622.94 16.48a27.63 37.23 49.69 58.47 62.18a59.08 54.23 42.02 24.80 22.84 39.80
19579.85 25.57 28.84 36.48 49.16 54.47 63.90 61.83a51.25 41.21 25.03 26.06 39.47
195823.26 30.96 26.87 36.28 53.75a55.93 60.03 62.69 52.92 44.74 29.21a26.40 41.92
195921.15 19.57 27.66 37.03 42.17b56.87 61.84 59.61 49.58 40.02 26.08 23.50 38.76
196019.47 16.67 28.85 37.00 46.27 56.40 65.23 59.48 53.80 42.75a29.22 23.10 39.85
196123.33b29.72a35.34l35.77d47.56 61.30h64.68a63.84 45.12a39.29 28.16a18.60a39.61b
196211.15a22.55 26.24 40.90a47.74b55.43 60.16 60.10 52.50 46.71 33.83 25.56d40.24
19639.24d30.36 30.18 36.65 48.10a53.69c63.98a62.63a57.86a48.60 33.11b22.07a41.37
196419.65a19.57a23.63 38.03 49.06 53.46b65.15a58.09d50.46d44.76 28.97 20.21g40.99a
196523.39c22.81b16.50h37.90d44.53a53.79a60.90 60.10a45.24g46.93a34.60 25.00b41.00b
196619.79b20.14c29.15 34.19c49.38g53.80c65.21b59.08a-----z-----z-----z-----z40.19e
1967-----z22.97j30.09d33.96f45.61 52.98 65.21 63.98a57.40 43.28b30.95b15.42a44.99c
196819.82 26.98 33.63a34.12e44.94 55.07 63.88a56.98 52.12 44.29 28.68 20.74 40.11
196921.31 24.69a25.30a42.71a51.21 52.50a62.89 66.03a56.95 36.47 31.45 25.14f42.86a
197021.44 29.36c22.19 31.07 47.95a58.15 64.95 66.19 48.02a37.90 30.17 20.86c39.85
197120.77 22.27 24.67d36.65c-----z56.60 61.90a67.47 49.46b40.36b28.66a16.98a38.71a
197218.17b25.14 35.21 39.05 48.16 58.57 60.98 62.98 50.29a41.57d29.55 13.87 40.30
197318.42 26.16 30.76 34.28 47.42 56.98 64.18 63.82 51.35 44.21 -----z24.06e41.97a
197417.07a23.02a27.66b38.25 44.63 60.05 66.34 59.45 51.91a45.61 29.58 19.82f42.14a
197516.22b18.50b24.23 28.28 42.79 52.77 66.45 58.65 53.43 42.95 26.65 26.03 38.08
197622.84 24.98 25.45 39.93 50.32a53.87d65.15 58.73 53.88f40.83a33.88a22.90 39.90a
197716.89 27.81d26.78d42.10d-----z-----z-----z-----z-----z44.27k-----z23.12g28.39h
1978-----z-----z-----z39.46c44.76j56.65 63.66 60.94 53.77 47.17j-----z-----z54.90g
19797.56g22.52 28.65 37.72 47.87a55.90a65.58a62.33a57.46c44.64c23.29a25.29b42.84a
198014.65a25.94b26.88g40.15c50.75g55.91c63.85a58.55a53.62e41.60f30.77d27.97 41.27c
198128.58 22.69d33.66c39.25d47.82f52.10f-----z-----z-----z37.81o35.90i22.48i31.04h
198216.19j19.89f29.28a30.17i46.67p54.98a62.24 65.15a51.07p-----z25.64b22.04e43.22f
198326.62c27.82c32.77c35.84a44.62f53.61b61.12c-----z51.10f-----z30.39b13.77e35.24d
198420.58a25.00 30.98a36.68b45.34f54.12b64.60 64.67a-----z-----z29.46b-----z40.76d
198517.45a16.33b26.81 40.32b49.88j56.45b65.68 -----z48.12e39.54f18.57a18.90b34.29c
198626.95b26.35a38.68 39.38 46.39d61.42 60.32a62.38c46.55b42.35d26.78e21.57b41.59
198718.36c26.66 30.90 44.81a51.20a58.61b60.31 59.48a54.48 44.82 32.72 20.06 41.87
198816.19 23.02 27.34 40.20 49.44 63.23 66.35 62.60b52.57 48.74 28.98 19.71 41.53
198919.53 11.96 29.05a39.21b46.76 55.45 67.72a60.69 52.53 41.23 31.03 19.90 39.59
199023.26 20.82 31.21 41.53 44.84 56.14a64.23 64.05 58.93 40.05 31.65 11.71c40.70
199118.55a31.78a30.62a36.33 45.50a56.58 65.34 66.05 53.62a40.35 24.70 22.68a41.01
199223.03 31.16 38.00 43.13 52.24 56.85 58.03 61.18 51.70 44.98 25.60a16.82 41.89
199317.62a20.37b32.40 37.17 50.00 53.42 54.72b57.68 50.90a41.27 24.59b23.48a38.63
199427.40 20.96d33.32 40.32 52.43a57.03a63.07c65.31d56.74a41.62a22.03 24.79e42.09
199521.65a28.21b28.45 37.05a45.26d53.19a62.15 62.98 53.69a37.40 32.00 23.87 40.49
199619.66c23.19b26.39 38.37 42.71b58.43 66.02b63.82a50.75b41.93a30.32 21.33a40.24
199717.57a22.36 29.82a32.55 48.42 57.00b62.02b61.47b54.79a40.27 28.62a20.35a39.60
199824.42 26.20a29.48 38.57 48.39 48.47 67.15 65.77a58.60 42.00 31.95 19.18 41.68
199924.95 25.52 31.10 34.33 44.47 53.60 63.48 63.65 49.45 44.60 38.13 23.68 41.41
200023.00 28.36 31.15 41.30 46.27a56.46b65.97a64.78d50.93a41.57a19.62a19.20d40.72
200120.36c18.63a31.95a37.87 50.16b55.88a65.68a64.13d58.19c42.03b34.55 19.10 41.54
200218.50a19.64 23.03b35.75d43.91b57.05 67.31 58.80a53.81a35.55b27.25 23.78a38.70
200325.61 19.43 28.79b39.34a46.89 55.30 68.87 66.50c51.61b44.48c-----z22.83a42.70a
200418.62b22.50 35.84 41.13 45.53 53.62 62.73 60.03 52.48c44.65 32.15 26.41b41.31
200525.15 26.89 32.65 40.17 47.72a55.18 67.77 62.71 54.26a46.52 31.33 20.32 42.56
200627.05 -----z30.55 40.59c50.65 60.14a69.48 63.83a52.65d39.89 30.98a23.02 44.44a
200717.55a26.54 37.31 40.75 51.32a59.17i72.16 64.48b55.18 41.06 31.97 19.90 41.66a
200816.76 25.64 23.15e29.74a48.24j54.78 65.08 64.60 51.48 42.03a34.85 16.53b38.60a
200920.18a24.45 26.39 37.00 48.18 53.37 62.24 62.19 58.28 32.98 31.23 14.70a39.27
201022.66 24.36 33.50 37.97 42.08a54.41c62.35e62.13 55.02 47.09b26.98 24.13 41.06
201121.06 16.02 31.58 34.80 43.53 53.50 64.92 64.89 57.00 45.45 28.55 21.26 40.21
201225.29 23.95 35.66 43.87 45.68 56.58 67.24 65.13 56.87 40.66 34.20 23.76 43.24
201319.45 24.59 30.15 35.75 49.65 57.40 67.42 66.69 55.92 38.31 31.38 17.11 41.15
201424.13 18.30a29.63 39.28a49.66 53.95 66.32 61.20a54.28 46.61 28.15 26.05 41.46
201525.53 29.79 37.15 40.35 47.56 62.52 63.37 63.00 56.78 49.45 26.20 22.52 43.68
201625.76 30.00 33.73 44.07 48.48 62.87 65.37 64.45 55.42 45.08 38.07 15.66 44.08
201715.53 27.36 37.53b39.48 48.82 57.93a68.65 63.85 52.68 39.50b29.90d20.86c41.84
201825.87 18.56b29.71 38.14b51.23 56.37 65.71 61.98 54.40 40.37 28.34a21.44 41.01
201923.00 11.54 23.74j39.05b45.15 55.66a64.95b64.81 54.57 32.60b30.27 24.24 40.53a
202025.08 22.07 30.61 36.28a47.44 56.52 62.86b66.65 55.42 39.40 29.53 23.40 41.27
202122.88a14.80 30.67a36.48a45.98a63.20 69.81 61.73 55.70 42.52 31.76g24.27a42.55a
202220.11 17.73 30.68 31.47a43.66 53.73 65.25a66.82 58.48 43.76 20.78 18.40 39.24
202319.39 20.26a23.03 35.00f52.10a55.37 65.38a63.27a54.92 41.05a32.07 27.35 41.29a
202419.92 27.62a29.52 39.44m-----z-----z-----z-----z-----z-----z-----z-----z25.69i
Period of Record Statistics
MEAN20.31 22.78 28.87 37.96 47.24 55.34 63.77 62.26 52.98 42.29 29.28 21.50 40.32
S.D.4.41 4.84 4.28 3.24 2.98 3.08 2.90 2.61 3.06 3.55 4.27 3.59 1.54
SKEW-0.72 -0.41 0.12 -0.31 0.10 0.36 -0.05 0.06 -0.16 -0.51 -0.26 -0.54 -0.00
MAX29.60 31.78 38.68 44.81 54.03 63.23 72.16 68.23 58.93 49.45 38.20 28.05 44.08
MIN3.73 10.80 19.48 28.28 41.66 48.25 54.72 56.97 45.12 32.60 18.57 11.71 36.32
YRS86 88 87 87 79 87 90 89 84 83 85 84 57