YELLOWSTONE PARK MAMMOTH, WY

Minimum of Minimum Temperature (Degrees Fahrenheit)

(489905)

File last updated on April 23, 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
1894-25.00a-24.00 -5.00 -----z-----z-----z47.00 49.00 36.00a26.00p-1.00a-17.00b-----z
1895-23.00b-26.00 -17.00 11.00 20.00 28.00 33.00 36.00 -0.00 14.00 -10.00a-6.00 -26.00c
1896-16.00 -5.00 -21.00 -0.00 19.00 32.00 37.00 30.00 21.00c19.00 -27.00c10.00 -27.00f
1897-----z-10.00 -17.00 11.00 23.00 33.00 32.00 37.00 26.00a14.00 1.00b-19.00b-----z
1898-20.00 1.00a-22.00a6.00 23.00 31.00 32.00 37.00 25.00 12.00 -13.00a-15.00 -22.00c
1899-11.00 -35.00 -10.00 10.00 15.00 26.00 34.00 34.00 27.00 13.00 12.00a-2.00b-35.00c
1900-12.00c-25.00 -4.00 21.00 30.00 30.00 32.00 38.00 12.00 18.00a-12.00a-25.00 -25.00e
1901-15.00a-15.00 1.00 7.00 29.00 20.00 30.00 39.00 25.00a26.00 11.00e-3.00c-15.00j
1902-30.00a-19.00 -2.00 9.00 23.00 30.00 35.00 30.00a25.00a25.00 3.00 -5.00d-30.00g
1903-1.00 -20.00 -3.00b8.00 21.00 31.00a34.00 36.00 18.00 18.00 -10.00 2.00a-20.00d
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-----z34.00 41.00 33.00 23.00 12.00 -10.00 -14.00a-----z
1942-28.00 -19.00 1.00 22.00 20.00a25.00 38.00 35.00 25.00 9.00 5.00 -10.00a-28.00b
1943-----z-8.00 -19.00 23.00 18.00a29.00 36.00 35.00 24.00 22.00 3.00 -8.00 -----z
1944-12.00 -9.00 -13.00 17.00 24.00 32.00 36.00 34.00 21.00 22.00 5.00 -18.00a-18.00a
1945-7.00 -5.00 -14.00 -4.00 23.00a25.00 33.00 34.00 18.00 10.00a-1.00 -15.00 -15.00b
1946-4.00 -7.00 5.00 16.00 20.00 31.00 38.00 31.00 23.00 14.00 -0.00 -12.00 -12.00
1947-20.00 -23.00 -17.00 11.00 21.00 29.00 36.00 31.00 25.00 20.00 -6.00a-9.00 -23.00a
1948-26.00 -26.00 -10.00 11.00 20.00 35.00 38.00 33.00 22.00a12.00 -3.00 -24.00 -26.00a
1949-30.00 -27.00a-5.00 8.00a25.00 26.00a33.00 34.00b27.00 11.00 21.00 -12.00 -30.00e
1950-24.00 -10.00a-17.00 8.00 6.00 27.00 35.00 36.00 21.00 12.00 -3.00 -7.00 -24.00a
1951-36.00 -26.00a-12.00 12.00e26.00 24.00 32.00 33.00 19.00 10.00 -4.00 -14.00 -36.00f
1952-19.00 -12.00 -14.00 12.00 18.00 27.00a31.00 36.00 24.00 18.00 -15.00 -6.00a-19.00b
1953-0.00 -11.00 -7.00 5.00 16.00 32.00a-----z37.00 29.00 14.00 3.00a-6.00a-----z
1954-18.00a3.00 -10.00 17.00 9.00 26.00e28.00a27.00 24.00 15.00 -8.00 -15.00 -18.00g
1955-9.00 -21.00 -17.00 9.00 26.00 31.00 31.00 36.00 22.00 12.00 -21.00 -17.00 -21.00
1956-19.00 -27.00a-25.00 5.00 24.00 31.00 34.00a26.00 25.00 8.00 -9.00 -17.00 -27.00b
1957-25.00 -8.00 -2.00 14.00 26.00 33.00 33.00 36.00 24.00 19.00 -7.00 -0.00 -25.00
1958-2.00 6.00 1.00 11.00 28.00a35.00 33.00 33.00 26.00 16.00 -3.00 -1.00 -3.00a
1959-29.00 -9.00 -5.00 5.00 24.00a32.00 32.00 31.00 15.00 15.00 -27.00 -5.00 -29.00a
1960-15.00 -21.00 -23.00 6.00 21.00 27.00 37.00 29.00 28.00 11.00a-3.00 -11.00 -23.00a
1961-17.00b-0.00 -0.00c11.00d24.00 37.00 38.00 42.00 17.00 7.00 -5.00a-22.00a-22.00k
1962-30.00a-29.00 -9.00 14.00 28.00b26.00 35.00 29.00 20.00 22.00 10.00 -20.00d-30.00g
1963-36.00c-2.00 -3.00 11.00 29.00a33.00b35.00a38.00a35.00a14.00 11.00b-13.00a-36.00l
1964-8.00a-12.00a-10.00 3.00 25.00 32.00b36.00a31.00d23.00d11.00 -6.00 -34.00c-34.00p
1965-0.00c-16.00a-24.00g15.00d21.00a31.00 34.00 28.00 12.00f19.00a6.00 -5.00b-24.00y
1966-20.00b-13.00c-17.00 3.00b15.00f21.00c39.00b29.00a-----z-----z-----z-----z-----z
1967-----z-6.00j-15.00c10.00f11.00 31.00 40.00 36.00 31.00 18.00b-1.00a-18.00a-----z
1968-18.00 -3.00 5.00a10.00c14.00 24.00 25.00a24.00 28.00 16.00 -0.00 -12.00 -18.00e
1969-16.00 3.00a-6.00 12.00 21.00 24.00a35.00 36.00a30.00 6.00 5.00 -7.00e-16.00h
1970-21.00 7.00c-20.00 4.00 17.00 32.00 39.00 41.00 21.00a11.00 -1.00 -0.00c-21.00g
1971-18.00 -11.00 -10.00d10.00c-----z33.00 36.00 35.00 23.00b1.00b2.00a-16.00a-----z
1972-25.00 -22.00 6.00 12.00 18.00 37.00 34.00 41.00 22.00a5.00d-3.00 -27.00 -27.00e
1973-22.00 -8.00 11.00 6.00 21.00 27.00 39.00 39.00 25.00 14.00 -----z-6.00e-----z
1974-18.00a3.00a-5.00a10.00 23.00 30.00 37.00 31.00 13.00 17.00 5.00 -10.00f-18.00i
1975-18.00b-12.00a-1.00 3.00 19.00 29.00 44.00 33.00 25.00 13.00 -10.00 -7.00 -18.00c
1976-6.00 -17.00 -10.00 13.00 27.00a21.00c21.00 30.00 22.00f17.00 -3.00a5.00 -17.00k
1977-14.00 3.00d2.00d9.00d-----z-----z-----z-----z-----z18.00k-----z-2.00g-----z
1978-----z-----z-----z22.00c21.00j30.00 36.00 35.00 22.00 12.00j-6.00f-31.00i-----z
1979-23.00b-11.00 -0.00 4.00 24.00a25.00a42.00 41.00a29.00c9.00c-5.00a-3.00a-23.00m
1980-28.00a-8.00a-0.00g12.00c30.00f35.00b39.00a36.00a28.00c11.00e1.00d2.00 -----z
19818.00 -29.00c12.00c13.00d26.00f30.00f-----z-----z-----z16.00l7.00i-1.00i-----z
1982-13.00i-27.00d4.00 1.00f18.00l29.00a41.00 42.00a27.00p-----z-6.00b-8.00e-----z
19833.00c-2.00a-0.00c5.00a18.00e34.00b35.00b-----z22.00f-----z-7.00a-28.00e-----z
1984-20.00a6.00 1.00a9.00a16.00f29.00b42.00 40.00 -----z-----z5.00b-----z-----z
1985-19.00a-25.00a-5.00 15.00b24.00j33.00b40.00 -----z9.00e8.00e-13.00a-16.00a-----z
19864.00b-16.00a17.00 13.00 26.00d37.00 33.00a38.00c26.00b12.00d-13.00e1.00a-16.00w
1987-16.00c-2.00 -9.00 16.00a25.00a29.00a36.00 33.00a27.00 18.00 8.00 -11.00 -16.00g
1988-15.00 -11.00 -0.00 12.00 23.00 35.00 36.00 37.00b28.00 22.00 4.00 -5.00 -15.00b
1989-8.00 -35.00 -14.00 9.00b22.00 34.00 43.00a34.00 23.00 21.00 2.00 -13.00 -35.00c
1990-4.00 -17.00 -4.00 16.00 19.00 32.00a41.00 41.00 33.00 18.00 3.00 -35.00 -35.00a
1991-20.00a9.00a3.00 20.00 20.00 35.00 39.00 42.00 28.00a-8.00 -11.00 -9.00a-20.00d
1992-4.00 9.00 12.00 16.00 27.00 35.00 40.00 29.00 26.00 18.00 -4.00 -15.00 -15.00
1993-9.00a-16.00b-6.00 18.00 26.00 32.00 35.00b31.00 24.00a7.00 -17.00b2.00a-17.00i
1994-2.00 -15.00c9.00 12.00 31.00a32.00a34.00b40.00d29.00a18.00a-1.00 1.00d-15.00q
1995-14.00 -15.00 -2.00 15.00a16.00c31.00a37.00 39.00 19.00a12.00 1.00 -7.00 -15.00f
1996-16.00b-24.00b-7.00 18.00 22.00b32.00 43.00a34.00a22.00b6.00 3.00 -10.00a-24.00k
1997-30.00a-5.00 -0.00a1.00 26.00 34.00b38.00b39.00b29.00a14.00 -0.00a-9.00a-30.00k
1998-9.00 -2.00a-2.00 12.00 29.00 26.00 45.00 41.00a32.00 21.00 9.00 -26.00 -26.00b
1999-2.00 2.00 -2.00 6.00 19.00 30.00 33.00 42.00 20.00 16.00 8.00 4.00 -2.00
2000-3.00 4.00 1.00 11.00 22.00a29.00a42.00a39.00d17.00a15.00 -4.00a-13.00 -13.00i
2001-2.00b-18.00a9.00a13.00 22.00a29.00a39.00a28.00d32.00c14.00b9.00 -1.00 -18.00p
2002-8.00a-15.00 -10.00a6.00b17.00b30.00 37.00 31.00a26.00a-7.00a-3.00 -3.00a-15.00j
2003-2.00 -24.00 2.00b9.00 15.00 30.00 43.00 36.00c27.00b5.00c-----z2.00a-----z
2004-23.00b-7.00 8.00 13.00 19.00 31.00 39.00 36.00 28.00c18.00 -4.00 -11.00a-23.00f
2005-7.00 -4.00 9.00 13.00 19.00a32.00 42.00 33.00 33.00a25.00 2.00 -18.00 -18.00b
20068.00 -----z-1.00 15.00b22.00 38.00 45.00 34.00a31.00d5.00 -4.00a-7.00 -----z
2007-25.00 -12.00 -0.00 14.00 24.00a34.00i46.00 38.00b30.00 22.00 1.00 -4.00 -25.00l
2008-17.00 6.00 -4.00 -6.00 27.00j30.00 36.00 37.00 29.00 14.00a13.00 -18.00 -18.00k
2009-14.00a-1.00 -7.00 14.00 22.00 31.00 37.00 34.00 31.00 4.00 8.00 -15.00a-15.00b
2010-16.00 -3.00 10.00 10.00 15.00a34.00c37.00e37.00 32.00 26.00 -12.00 -10.00 -16.00i
2011-10.00 -18.00 12.00 15.00 24.00 33.00 45.00 44.00 31.00 14.00 2.00 -11.00 -18.00
2012-0.00 3.00 -0.00 21.00 22.00 32.00 45.00 38.00 31.00 14.00 2.00 -6.00 -6.00
2013-10.00 -3.00 -4.00 6.00 20.00 32.00 44.00 46.00 30.00 15.00 -2.00 -21.00 -21.00
2014-6.00 -29.00a-12.00 12.00a23.00 36.00 40.00 38.00 24.00 25.00 -11.00 -18.00 -29.00b
2015-10.00 -7.00 -2.00 17.00 25.00 41.00 39.00 36.00 35.00 28.00 -9.00 -2.00 -10.00
2016-2.00 -2.00 1.00 25.00 28.00 34.00 41.00 37.00 32.00 20.00 8.00 -24.00 -24.00
2017-20.00 -9.00 12.00b18.00 27.00 33.00a45.00 41.00 29.00 17.00b2.00d-9.00c-20.00l
2018-0.00 -20.00a7.00 9.00b30.00 29.00 37.00 33.00 29.00 14.00 2.00 -11.00 -20.00c
2019-15.00 -26.00 -18.00j9.00b9.00 30.00 40.00b37.00 24.00 -7.00 2.00 -3.00 -26.00n
20203.00 -10.00 6.00 -0.00 29.00 31.00 36.00b37.00 22.00 -7.00 4.00 -1.00 -10.00b
2021-3.00a-20.00 5.00a12.00 22.00a33.00 45.00 38.00 25.00 21.00 13.00g-5.00a-20.00k
2022-15.00 -24.00 -16.00 -1.00a20.00 20.00 30.00 40.00 29.00 18.00 -11.00 -33.00 -33.00a
2023-27.00 -19.00 -2.00 5.00f21.00 30.00 37.00a40.00a32.00 2.00a9.00 -2.00 -27.00i
2024-31.00 -8.00 -3.00 11.00m-----z-----z-----z-----z-----z-----z-----z-----z-----z
Period of Record Statistics
MEAN-14.11 -11.86 -4.01 10.86 21.80 30.53 37.14 35.63 25.13 13.76 -1.72 -10.48 -20.70
S.D.10.32 10.91 9.31 5.90 4.94 3.99 4.73 4.52 5.91 7.38 8.55 9.12 8.30
SKEW0.06 -0.02 -0.12 -0.22 -0.70 -0.47 -0.29 0.02 -1.18 -0.88 -0.46 -0.50 0.30
MAX8.00 9.00 17.00 25.00 31.00 41.00 47.00 49.00 36.00 28.00 21.00 10.00 -2.00
MIN-36.00 -35.00 -25.00 -6.00 6.00 20.00 21.00 24.00 -0.00 -8.00 -27.00 -35.00 -35.00
YRS88 90 89 88 81 89 90 89 85 85 86 87 37