YELLOWSTONE PARK MAMMOTH, WY

Average of Maximum Temperature (Degrees Fahrenheit)

(489905)

File last updated on April 18, 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
189425.33a23.00 35.52 -----z-----z-----z78.52 81.29 62.34a54.07a45.00a28.52b48.18c
189527.21b29.11 34.44v-----z58.23r64.90 76.23 78.77 65.10 58.58 33.24a25.52 50.96c
189633.71 34.21 34.39 44.37 50.81 71.23 77.23 76.97 62.34a55.61 27.89c34.87 50.30
1897-----z29.21 28.39 48.17 68.94 66.23 74.81 78.55 70.21a51.16 38.68b27.03b52.85a
189823.13 35.19a31.43a52.43 55.68 68.68h78.23 79.19 67.13 45.84 34.10a25.87 48.02a
189928.32 20.25 32.81 46.27 52.81 65.80 77.35 71.90 71.77 47.16 44.93a25.24b48.72
190028.25c21.31o45.23e52.43 63.74 77.07 77.84 76.61 63.73 53.80a40.41a31.84 55.54a
190129.19 28.18 37.53a46.62a65.48 63.61b85.13 78.65 59.54b58.45 44.72a28.88e52.17
190226.03a35.79 34.83b47.63 61.50a68.10a72.97 77.03a66.55a56.48 36.93a31.03 51.24
190330.87 24.74a39.43a48.10a56.68 71.52a75.24b78.77a64.14a59.39 41.57 33.30a51.98
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-----z67.40 76.68 73.87 57.83 51.77 38.93 32.43a56.99e
194229.16 29.86 39.14b55.69a55.35 66.07 81.87a79.93a69.69a56.83a37.93 32.81 52.86
1943-----z37.15a36.23 57.00 56.93a65.40 81.45 79.84 73.03 58.97 44.47 34.60a56.82a
194430.84 32.83 36.16 50.50 63.03 65.13 76.52 77.68 68.97 62.58 38.57 32.06 52.91
194533.71 34.50 40.26 44.60 59.68 61.73 79.52 79.74 63.90 60.90 37.60 29.10 52.10
194631.00 34.11 43.90 56.52a57.42 71.90 82.32 78.58 63.93 40.74 35.40 30.45 52.19
194723.97a31.68 38.90 46.70 61.16 59.57 80.16 73.81 64.27 54.77 31.00 27.68 49.47
194826.74 27.54a33.24b45.41a59.57a66.00 74.63a75.10 67.00a57.81 29.60 21.29 48.66
194914.48 26.00a37.94 54.37 62.71 69.66a80.29 82.59b69.20 46.84 48.70 29.65 51.87
195022.84 36.64 36.65 48.50 57.03 69.50 76.13 76.71 64.63 56.35 38.70 36.03 51.64
195126.55 36.46 36.00 50.64e62.00 61.33 79.10 74.19 65.50 48.13 37.03 25.87 50.23
195227.81 32.52 35.35 56.10 61.55 71.53 77.81 76.48 73.42f65.23 37.83 32.60a52.26a
195336.58 33.21 42.68 45.47 54.84 69.38a-----z80.37a73.93 61.77 46.07 30.87a52.29a
195431.19 39.52a36.58 51.47 62.94 63.08e83.60a78.00 70.87 55.29 46.67 31.90 54.26
195527.42 27.93 32.32 45.77 60.23 67.83 79.16 83.00 67.03 57.87 32.50 31.35 51.03
195632.61 28.04a39.94 49.57 63.48 75.67 80.10a76.94 72.27 54.45 37.07 32.23 53.53
195720.29 35.25 39.97 47.97 61.23 68.03 81.58 79.37a67.17 53.45 34.73 34.29 51.94
195833.74 40.79 37.26 47.03 69.33a70.63 76.03 80.58 68.20 60.32 38.69a35.45 54.84
195930.00 30.82 39.06 49.57 54.45b72.40 80.90 77.77 64.43 52.94 38.47 35.19 52.17
196028.74 28.24 41.03 50.47 60.94 73.73 84.26 75.81 70.03 55.47a37.87 33.45 53.34
196134.52b37.44a46.89l47.88d60.74 78.77h82.87a80.42 57.03a51.29 37.97a27.10a51.73b
196221.07a31.89 37.48 53.93a59.17b69.67 76.39 77.35 69.83 62.26 43.57 34.96d53.13
196320.89c40.86 41.84 47.43 60.90a66.48c82.23a81.07a72.34a62.74 41.48a32.60a54.24
196427.97 30.41 34.16 48.87 60.58 65.89b84.10a75.37d68.19d61.94 41.00 30.46e52.41
196533.68c33.74a33.38g49.46d58.50a68.48a78.65 75.60a59.96f63.67a45.37 35.76b54.29b
196629.27a33.00c42.81 47.85c67.56d69.56c84.55b76.47a-----z-----z-----z-----z56.38d
1967-----z34.40h40.39c45.96f59.55 66.70 82.61 83.00a73.43 54.62b40.96b24.43a58.41c
196829.65 36.86 45.20a45.64e57.39 68.73 81.81 71.39 66.10 56.71 37.20 29.19 52.16
196930.87 34.04a38.80a58.07a68.16 66.23 79.06 83.39 72.90 47.97 42.33 34.78d54.72
197031.48 40.72c37.23 41.93 61.20a72.90 80.52 84.19 61.31a50.35 40.07 28.76b52.56
197128.74 31.46 35.41d48.22c-----z70.77 79.23a84.71 63.40 50.50a38.14a26.55 50.65a
197226.66b35.34 45.90 50.00 61.48 73.03 77.06 78.10 63.62a53.81d37.40 21.26 51.97
197327.19 37.82 41.42 44.87 61.65 71.70 81.03 79.74 65.23 56.94 -----z34.92e54.77a
197425.23 31.07a36.37a49.00 56.61 76.50 84.00 75.97 71.07a60.58 38.13 28.96f54.96a
197524.55b28.38b34.65 37.63 53.16 66.40 82.23 73.29 71.40 53.58 35.93 33.39 49.55
197631.48 34.21 37.71 51.37 65.39 69.77d82.90 76.87 72.00f54.83a43.38a32.55 52.77a
197727.39 41.00d37.59d58.19d-----z-----z-----z-----z-----z57.45k-----z31.12f41.04h
1978-----z-----z-----z49.21b56.84f73.27 80.26 76.94 67.57 63.71j-----z-----z69.45g
197917.84f32.00 40.39 48.20 61.77a71.50 83.47a77.61 74.93c57.82c34.62a34.17a56.04a
198025.27a35.74b37.96g52.30c62.61c68.93b79.23 73.93a66.81d55.35e41.32b36.10 54.32a
198139.35 33.17d44.82c49.50d58.08f63.28e-----z-----z-----z50.42l46.48i31.55i46.02g
198226.54g29.12b38.50a40.91h59.87p68.80 75.19 80.97 62.20o-----z34.75b29.23 50.94e
198335.83b37.73b41.89c47.00a56.85d66.03a74.79b-----z64.29f-----z37.43b22.69e46.69c
198428.13 36.17 39.47a47.07b56.79b67.37 79.48 79.93a-----z-----z38.21a-----z52.51c
198528.03 27.92b38.00 51.32b62.09i70.24a81.39 -----z59.76a51.30a27.70 28.27a46.39b
198636.47a34.71 48.35 49.23 59.68 76.67 74.23 79.29 58.30 55.10 37.73 32.90b53.55
198728.35 37.39 41.29 60.57 65.19 73.45a73.81 75.03 71.23 61.00 42.73 29.52 54.96
198825.87 34.66 37.39 51.67 62.32 78.00 83.65 80.71 67.17 64.00 37.17 29.29 54.32
198928.61 23.07 38.87a51.80 58.48 68.77 84.00 74.97 68.03 50.97 39.43 29.68 51.39
199031.13 31.14 41.68 53.77 55.32 69.47 80.06 80.06 75.73 50.77 40.57 21.32c52.59
199127.35 41.89 40.53a45.00 56.30a70.40 82.29 82.39 68.40 54.19 33.37 31.84 52.83
199232.84 41.31 49.87 55.20 66.13 70.13 71.48 77.74 65.70 57.65 34.41a26.65 54.09
199327.81 32.89 43.52 46.07 63.16 66.30 67.87 72.13 66.93 53.84 34.10 32.65 50.61
199435.45 30.96a44.68 53.60 66.00 71.23 80.07a82.71 73.60 52.10 32.17 33.32c54.66
199531.27a38.04b37.61 47.50 56.60a65.40 75.94 78.97 68.13 48.26 41.00 33.39 51.84
199629.60a31.90 36.65 48.60 52.61 73.53 82.77a81.35 64.77 55.83a39.77 28.58 52.16
199727.42 33.14 40.10 44.20 61.52 71.73 77.19 77.42 69.40 51.10 39.40 31.23 51.99
199833.65 36.57 40.55 50.40 62.13 59.67 84.10 82.90a73.93 55.42 39.17 28.16 53.89
199933.90 36.39 45.00 47.27 56.48 66.53 81.13 79.74 64.87 59.13 49.77 32.61 54.40
200032.90 38.41 42.77 55.37 57.58 70.86a84.58 82.35 65.13 53.13a30.67 29.44d53.60
200132.34b30.68 44.19 49.50 65.63a70.03 81.97 84.42 73.90 54.23 44.40 28.45 54.98
200228.71 31.82 36.13a47.96b58.48 71.57 85.90 77.03 68.60 48.93a37.37 33.06 52.13
200335.29 31.18 40.06 50.38a59.35 70.07 87.16 84.77 68.67 59.77 -----z32.55 56.30a
200428.87 33.90 48.35 55.50 58.19 67.37 79.52 76.77 68.37 56.61 42.80 33.93a54.18
200534.87 40.39 43.77 51.73 60.06 68.47 84.10 78.52 68.50 59.13 41.30 28.90 54.98
200635.52 -----z40.61 52.14a65.26 75.31a86.55 82.00 68.37 51.26 39.30 31.74 57.10a
200727.83a35.50 48.29 52.27 66.55 74.10i89.13 81.19 70.00 51.45 42.30 27.77 53.84a
200825.16 35.97 31.54e40.10a59.29j68.30 81.61 80.65 66.10 53.23a43.53 24.86b50.10a
200929.37a33.93 36.84 46.63 60.81 64.60 77.74 77.13 75.20 42.29 39.57 22.53a50.55
201031.23 33.54 45.16 50.33 53.94 66.71b77.50e76.74 69.53 59.31b36.77 33.29 52.84
201129.10 26.46 41.35 44.97 53.13 65.93 80.26 81.16 72.90 56.52 38.90 31.29 51.83
201234.16 34.97 45.87 56.87 57.13 70.97 82.87 81.74 72.67 52.87 43.37 31.84 55.44
201329.03 34.61 42.26 47.97 62.13 71.20 82.74 82.71 67.60 49.65 40.93 25.52 53.03
201433.90 29.36 40.97 51.13 62.26 65.87 80.87 73.83a67.47 59.39 38.37 34.97 53.20
201537.06 39.75 50.55 53.07 57.87 76.70 76.58 77.48 70.37 62.10 35.83 30.71 55.67
201633.84 40.03 44.16 54.93 60.39 78.50 80.97 80.81 68.00 55.16 48.53 25.52 55.90
201726.13 36.96 46.14b49.60 62.32 72.00a85.81 80.35 66.33 52.00b40.00c30.69b54.03
201834.87 30.15b41.13 51.21b64.32 70.03 83.52 79.35 70.50 51.23 38.28a30.87 53.79
201933.06 23.96 38.43j50.75b57.00 69.28a80.41b81.39 66.33 44.28b40.60 32.81 52.72a
202033.13 32.55 41.84 48.34a59.68 69.80 79.86b83.90 72.30 52.71 40.93 33.06 54.01
202132.53a25.39 43.17a49.59a58.97a79.73 87.42 76.03 72.50 53.55 39.43g31.13a55.46a
202231.61 29.32 42.94 43.38a54.77 68.50 85.50a84.55 75.87 57.58 32.10 27.13 52.77
202328.35 31.52a34.71 49.00f67.20a69.80 84.03a78.37a69.60 54.07a43.77 37.71 54.47a
202430.26 37.68a42.32 52.53m-----z-----z-----z-----z-----z-----z-----z-----z36.75i
Period of Record Statistics
MEAN29.72 33.20 39.92 49.69 60.17 69.31 80.27 78.80 67.98 54.87 38.98 30.45 52.74
S.D.4.22 4.63 4.39 4.10 4.07 4.03 3.82 3.15 4.17 4.91 4.46 3.71 1.68
SKEW-0.54 -0.34 0.07 0.09 0.08 0.17 -0.37 -0.12 -0.36 -0.31 -0.12 -0.60 -0.38
MAX39.35 41.89 50.55 60.57 69.33 79.73 89.13 84.77 75.87 65.23 49.77 37.71 55.90
MIN14.48 20.25 28.39 37.63 50.81 59.57 67.87 71.39 57.03 40.74 27.70 21.26 48.66
YRS87 89 87 87 83 88 90 89 84 86 86 87 60