OLD FAITHFUL, WY

Average of Maximum Temperature (Degrees Fahrenheit)

(486845)

File last updated on August 23, 2019
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
1904-----z-----z-----z-----z55.72b65.90 73.90a75.10a67.53 53.86b46.40 31.35 58.72d
190525.71j34.36 42.79b47.40e50.53a67.33 80.23 84.81 70.36b46.00k45.67o25.93c55.97c
190630.43j34.25h34.54e49.42d56.95k63.25b74.87a72.32 66.21a50.27i34.17a32.77a53.44d
190721.62j37.25 34.19 44.53 52.40a57.90i76.81 75.59d66.13 61.65 39.90 28.77 51.72b
190830.23 33.83 33.23 51.37 53.29c58.73 76.97 71.03 63.93b46.07c39.45a-----z50.74a
1909-----z29.12c32.32 34.86b43.23 60.07o-----z-----z55.19d47.39 37.26c21.83h39.91e
1910-----z26.29 47.32c53.36b59.08s70.07a77.06 73.32 65.73d57.73e33.90 23.56d52.83b
191120.10b19.83e31.65 34.00k53.65 64.67f71.41b70.65 64.36b50.23a32.67 29.26 44.38b
191228.00c22.64g35.39c39.83a54.26 70.63 65.68c66.63a50.42d46.83m38.50l25.00l51.36d
191320.39m24.50f30.36c49.47 56.67a65.37 68.79c74.00c65.48c49.55b37.41c30.37d52.75b
191423.26 29.79 41.84 49.23 64.50a65.33 -----z74.73i65.87 50.52 46.85d25.65 46.28b
191526.87a34.11 41.55 55.77 51.64c58.38a70.65 77.39 59.30 53.42 32.87 27.10 49.09
191619.65 35.17 38.90 48.40 49.97 62.95i75.88f72.68c65.66a47.17y-----z-----z47.20e
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-----z59.67 54.55 40.03 29.26 45.88h
1935-----z-----z-----z-----z-----z67.03 80.87 77.39 69.80 52.57a33.04b30.75c58.78e
193624.13 22.97 34.74d47.20 64.55 72.79b81.48 75.42 65.23 53.16 41.00 26.21q52.97a
1937-----z-----z-----z45.75v59.97 64.82b76.58 76.52 67.07 56.26 38.17a29.71 58.64d
1938-----z-----z-----z-----z52.42 68.72a72.06 72.94 71.36e-----z-----z-----z67.50g
1939-----z-----z-----z-----z59.77 63.33 78.06 76.84 66.07 49.29 45.77 34.23 59.17d
194027.58 31.52 41.50a45.30 64.10 74.07a79.15d79.81 -----z53.35 -----z-----z55.15c
1941-----z-----z-----z-----z59.71 65.43 73.06 69.84 54.87 49.55 -----z-----z62.08f
1942-----z-----z-----z49.83 -----z63.10 -----z77.71 -----z-----z-----z-----z63.55i
1943-----z-----z-----z-----z-----z62.68b75.93a73.80a67.97 -----z-----z-----z70.09h
1944-----z-----z-----z-----z-----z-----z75.30a76.32 63.10a-----z-----z-----z71.58i
1945-----z-----z-----z-----z-----z-----z76.00 74.10b60.21a-----z-----z-----z70.10i
1946-----z-----z-----z-----z-----z-----z-----z76.90 -----z-----z-----z-----z76.90k
1947-----z-----z-----z-----z-----z-----z78.81 72.97 63.32b-----z-----z-----z71.70i
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-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z
1963-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z
1964-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z
1965-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z
1966-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z
1967-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z
1968-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z
1969-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z
1970-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z
1971-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z
1972-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z
1973-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z
1974-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z
1975-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z
1976-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z
1977-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z
1978-----z-----z-----z-----z-----z-----z-----z-----z61.75f54.63a34.03a18.23 35.63i
197917.94 29.57 38.81 42.83a55.00 66.52a75.27a69.68 69.27 52.58 33.23 33.10 48.65
198025.71 34.93 33.10 49.23 53.50a63.64b73.06 67.27a60.45a49.89c36.34a32.90 48.34
198135.32 32.07 41.68 47.19c51.13h59.79a-----z76.87 67.10 48.43c39.41a28.00 47.59b
198222.52d25.37a34.78d41.47k-----z63.00 69.36c73.44d61.85q44.39c30.21a25.15d43.14c
198330.93a33.32 37.16 -----z52.54g61.90a73.30d74.13a62.00d-----z-----z-----z53.25e
1984-----z-----z37.38b46.50l52.91h60.00j77.28b76.50a-----z-----z33.10a22.77a49.41g
1985-----z22.37a34.14b46.83g59.52b65.48c75.55 68.97a53.81i46.81e27.48c25.87a47.35c
198631.97 31.00 42.67a45.53 54.26 70.11c69.54c74.33a55.96b51.52 33.50 30.74 49.26
198727.23 36.68 38.97 56.15c59.33a68.00c70.32 70.10 68.70c58.97b43.19c31.13 52.40
198830.70a41.14a44.10 48.63 58.10b74.34a79.10 75.87a63.93a59.45b32.42d27.97a52.98
198929.23 29.89a44.11c46.41h53.89d63.14a78.94 70.32 64.37 49.11c39.66a27.42 50.01a
199027.97 28.21 41.45 50.53 51.07b64.77 75.77a74.39 70.93 48.27a36.77 17.94 49.00
199125.40a41.29 39.29 44.97 53.27a66.03 75.10 76.73a64.30 50.93b33.03 28.06 49.87
199230.90a41.19b49.60a53.54d62.33a66.53 68.19 74.57a61.66a54.13a31.17 22.55b51.36
199328.34b34.65b44.68 45.66a59.79b60.31d63.33a68.71 62.86b49.76b31.52a28.13a48.15
199431.17b30.89 46.23a50.13 62.26 68.86a77.57a79.74 70.77 48.38b29.40 28.68 52.01
199529.84 39.18 40.33a45.83 54.50a63.55a73.17a75.35 65.00 47.41b39.26c29.48 50.24
199626.47a32.38 37.41b43.62a48.90a70.03a76.19 74.26 58.66a-----z37.03a27.36c48.39a
199728.07c30.29 37.67a41.04c56.60a66.60 72.26 73.13 64.48a48.93d37.93 27.14b48.68
199830.90 32.86 36.81 45.55a55.55 57.79a77.97 74.32 68.67 52.66b35.79b25.93d49.57
199929.90a30.93a40.83a43.33 52.58 64.73 75.52 75.55 64.34a55.77 44.90 28.81 50.60
200027.71 35.24 37.90 48.53 52.90 66.17 76.19 75.84 60.90 49.26 28.47 26.87 48.83
200130.71 27.11 39.52 42.87 56.93d64.53 76.14b77.60f67.45a50.67y40.83a25.19 47.13b
200224.00 29.21 30.53a43.60 53.63a64.93a79.10 70.87a63.23 44.69b33.13 29.19 47.18
200332.58 29.04 35.06 45.52a54.23 65.07 80.52 77.32 62.10 55.63a27.83a28.60a49.46
200427.35 29.62 41.39 48.71b52.04d62.82b72.39 69.37a60.33c49.69e37.97 28.65 48.36
200529.84 34.68 37.45 44.69a-----z61.07 75.42 72.77 60.67 52.07a35.40 25.97b48.18a
200627.23a26.07 34.63a46.47 57.70a67.57 78.38b73.87 63.07 46.57a33.70 27.70a48.58
200724.52 30.32 41.42 47.76a58.07d68.64b82.41b74.30a63.20 48.39c37.00a22.79b49.90
200821.97a28.19c31.81 39.12d50.83b62.25b77.00a74.90a63.93a50.41b39.93 22.57a46.91
200928.55 31.93 33.90a43.21f57.62j60.50 72.94 72.34b71.61b41.06 36.24a-----z49.90c
201030.61 30.71 40.97a44.15c49.17b61.60 74.23 72.60a67.23 55.81 32.10a28.14b48.94
201124.72b24.57 33.39c38.74c47.42 59.53 73.90 75.84 69.00 49.77 33.17 28.58 46.55
201228.00 30.03 40.71 49.70 54.03 65.70 78.71 77.94 68.00 48.42 38.27 25.06 50.38
201324.42 28.32 35.65 42.47 56.68 66.63 81.29 79.29 64.79a47.29 35.90 22.29 48.75
201429.23 26.71 36.90 43.80 57.35 62.13 78.45 69.81 64.70 55.45 33.73 30.48 49.06
201533.16 36.93 44.26 48.60 55.48 73.59c72.61 75.03 66.63 56.71 32.17 26.06 51.77
201629.26 34.48 38.32 50.57 55.81 73.07 76.16 76.10 63.00 49.10 42.90 21.16 50.83
201723.00 32.58b41.03 45.47k56.89c68.76a79.30a77.06 64.50 48.07d36.57 28.12e50.53a
201832.18c24.81a35.21b39.86w63.17y66.96g78.35 76.23 68.57 46.97 34.43 25.81 46.95c
201928.23 23.75 38.45 45.30 53.97 64.73 77.43c77.43h-----z-----z-----z-----z47.41e
Period of Record Statistics
MEAN27.61 31.11 38.36 46.60 55.29 65.46 75.43 74.28 64.45 51.07 36.15 27.29 49.51
S.D.3.72 4.84 4.38 4.29 4.37 3.96 3.87 3.27 4.22 4.12 4.57 3.47 1.58
SKEW-0.55 0.07 0.26 -0.17 0.04 0.34 -0.77 0.07 -0.81 0.34 0.42 -0.58 0.37
MAX35.32 41.29 49.60 56.15 64.55 74.34 82.41 84.81 71.61 61.65 46.85 34.23 52.98
MIN17.94 19.83 30.36 34.86 43.23 57.79 63.33 66.63 50.42 41.06 27.48 17.94 46.55
YRS47 51 55 47 51 57 61 63 61 53 55 52 29