ARROWROCK DAM, ID

Minimum of Minimum Temperature (Degrees Fahrenheit)

(100448)

File last updated on March 28, 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
1911-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z10.00l9.00 -----z
1912-8.00 10.00 14.00a28.00 33.00 35.00 38.00 35.00 30.00 22.00 19.00 4.00 -8.00a
1913-8.00b3.00 11.00 25.00 29.00 40.00 38.00 42.00 30.00 24.00 18.00 -1.00 -8.00b
191411.00 -1.00 25.00 26.00 30.00 28.00 46.00 44.00 32.00 34.00 16.00 -0.00 -1.00
1915-8.00 21.00 24.00 31.00 32.00 37.00 41.00b47.00 -----z-----z11.00 -14.00b-----z
1916-5.00 14.00 22.00 29.00 26.00 32.00c43.00a39.00 35.00a27.00c7.00b-7.00c-7.00m
19172.00y-7.00 -1.00 21.00 31.00b32.00 49.00e51.00m40.00c31.00g15.00n14.00 -----z
19189.00b7.00b19.00a21.00b31.00c41.00d45.00j39.00b43.00d29.00a18.00f1.00b-----z
1919-2.00a13.00 8.00a29.00c31.00c34.00d50.00c50.00 38.00e16.00d3.00a-15.00d-----z
1920-0.00 14.00a23.00f19.00c30.00c34.00b55.00d43.00a37.00 27.00a18.00a6.00a-0.00w
19214.00 2.00a25.00c24.00e35.00 41.00a40.00a51.00b33.00e30.00f21.00a15.00 2.00y
1922-21.00a-5.00 2.00a23.00a28.00b44.00 50.00e51.00 33.00a26.00 16.00b-2.00d-21.00q
1923-4.00a-8.00 11.00a30.00a33.00 41.00 49.00 50.00d41.00b28.00a24.00a11.00a-8.00l
1924-10.00 23.00a20.00d25.00d30.00 37.00a48.00d42.00b30.00b28.00d18.00c-22.00d-----z
1925-0.00 17.00c20.00b31.00 35.00b37.00b51.00c38.00b35.00b29.00b21.00b20.00a-0.00u
192612.00 22.00 23.00b25.00 32.00a38.00a50.00b42.00 21.00d22.00d29.00 -5.00 -5.00n
1927-15.00 8.00b19.00a22.00a32.00 41.00c43.00a45.00 34.00 29.00d24.00d-6.00c-15.00s
1928-1.00 12.00a17.00a25.00 31.00 41.00b45.00 45.00b37.00c26.00f18.00f1.00e-----z
1929-11.00a-10.00c20.00a21.00 31.00 36.00a50.00d50.00c30.00c27.00i10.00c17.00e-----z
1930-23.00 20.00 21.00a32.00c33.00a33.00b51.00c46.00b37.00f25.00c4.00d-5.00b-----z
1931-3.00a12.00a17.00e27.00c30.00 41.00b46.00 46.00a33.00b31.00a-6.00e-12.00c-12.00x
1932-4.00a-6.00 12.00 30.00a34.00a40.00a45.00a36.00b34.00a24.00 24.00b-6.00a-6.00k
1933-1.00 -20.00a12.00 23.00 28.00a42.00 46.00 43.00a31.00c21.00d17.00a9.00a-20.00l
193420.00 25.00a26.00a30.00 35.00 37.00 50.00a51.00c24.00b28.00c17.00c11.00a11.00o
1935-17.00 2.00 11.00 29.00 31.00a41.00b39.00 44.00 36.00b17.00c2.00b9.00 -17.00j
1936-10.00 -13.00a13.00a8.00 35.00 42.00b51.00b47.00 32.00a27.00 13.00a12.00b-13.00j
1937-32.00a-5.00a18.00 25.00a35.00a40.00a51.00c42.00a32.00a29.00c21.00 16.00 -32.00m
193811.00a15.00a17.00a24.00 28.00a35.00a48.00c42.00 40.00a30.00a12.00 11.00 11.00j
1939-0.00 -6.00a4.00a23.00 34.00 34.00b42.00a48.00 36.00 25.00 19.00 12.00 -6.00e
194013.00 14.00g21.00 29.00 33.00 38.00 50.00 47.00a37.00 31.00 14.00 5.00 5.00h
19417.00 18.00 19.00 28.00 33.00 38.00 50.00 47.00 37.00 29.00 16.00 9.00 7.00
1942-9.00 -0.00 17.00 26.00 30.00 37.00 44.00 42.00 35.00 22.00 19.00 12.00 -9.00
1943-11.00 11.00 12.00 32.00 26.00 36.00 45.00 40.00 42.00 26.00 23.00 17.00 -11.00
19444.00 9.00 14.00 29.00 30.00 40.00 43.00 44.00 35.00 31.00 19.00 10.00 4.00
194512.00 17.00 11.00 24.00 36.00 32.00 48.00 42.00 35.00 25.00 16.00 -2.00 -2.00
19462.00 3.00 17.00 29.00 30.00 40.00 50.00 44.00 37.00 24.00 22.00 14.00 2.00
1947-18.00 15.00 22.00 28.00 40.00 39.00 46.00 44.00 35.00 30.00 13.00 11.00 -18.00
19487.00 -2.00 14.00 26.00 28.00 47.00 43.00 41.00 34.00a26.00a17.00 -14.00 -14.00b
1949-20.00 -7.00a16.00 26.00a30.00 34.00 45.00 47.00 33.00 23.00 25.00 -0.00 -20.00b
1950-7.00 -20.00a15.00 26.00 30.00 34.00 45.00 45.00 31.00 29.00 18.00 22.00 -20.00a
1951-8.00 -7.00 6.00 26.00 33.00 36.00 47.00 40.00 36.00 23.00 16.00 -0.00 -8.00
1952-1.00 -2.00 13.00 27.00 35.00 38.00 43.00 46.00 36.00 30.00 10.00 9.00 -2.00
195324.00 13.00 22.00a23.00 28.00a38.00 46.00a43.00 39.00a27.00a19.00 14.00 13.00e
195412.00 21.00 18.00 27.00d30.00 34.00 43.00a44.00a28.00 23.00 15.00 5.00 5.00f
19551.00 1.00 1.00 24.00 33.00 40.00 39.00 50.00 31.00 27.00 -6.00a6.00 -6.00a
1956-7.00a-12.00 12.00 24.00 31.00a39.00 44.00 43.00 34.00 26.00 18.00a9.00 -12.00c
1957-20.00 6.00 22.00 31.00 40.00 40.00 48.00 45.00b39.00c27.00 16.00 9.00 -20.00e
19589.00 16.00 20.00a30.00 35.00 45.00 50.00 47.00 30.00 29.00 12.00a21.00 9.00b
1959-0.00 16.00 21.00 26.00 30.00 38.00 43.00 44.00 33.00 31.00 18.00 15.00 -0.00
1960-1.00 1.00 4.00 25.00 30.00 39.00 49.00 38.00 38.00a25.00 20.00 13.00 -1.00a
196111.00 21.00 23.00 24.00 33.00a45.00 48.00 50.00 31.00 28.00 16.00 1.00 1.00a
1962-19.00 -0.00 14.00 29.00 36.00 33.00 47.00 42.00 35.00 31.00 22.00 12.00 -19.00
1963-9.00 20.00 23.00 25.00 38.00 43.00 48.00 47.00 44.00 25.00 18.00 12.00 -9.00
19641.00 7.00 6.00 25.00 29.00 42.00 49.00 37.00 36.00 28.00 16.00a-8.00 -8.00a
19658.00 13.00 12.00 32.00 30.00 42.00 47.00 42.00 28.00 34.00 18.00 14.00a8.00a
196612.00 11.00 15.00 26.00 32.00 38.00 43.00 44.00 41.00 26.00 25.00 12.00 11.00
196718.00 19.00 23.00 27.00 31.00 42.00 54.00 50.00 37.00 23.00 20.00 3.00 3.00
196811.00 16.00 27.00 23.00 25.00 39.00 45.00 43.00 35.00 26.00 22.00 5.00 5.00
19699.00 16.00 16.00 29.00 30.00 40.00 45.00 42.00 36.00 20.00 17.00 10.00 9.00
19703.00 18.00 24.00a25.00 30.00 40.00 45.00 49.00 29.00 21.00 25.00a8.00 3.00b
1971-6.00 7.00 -1.00 27.00 34.00 41.00 45.00 47.00 32.00 16.00 18.00 10.00 -6.00
19723.00 1.00 18.00 21.00 21.00 41.00 45.00 51.00 26.00 23.00 22.00 -10.00 -10.00
19739.00 18.00 26.00 26.00 33.00 35.00 45.00 45.00a37.00 28.00a16.00 15.00 9.00b
1974-11.00a6.00 13.00 27.00 29.00 40.00 49.00 46.00a37.00 27.00a21.00 8.00 -11.00c
19754.00 8.00 16.00 22.00 28.00 40.00 46.00 44.00 39.00 22.00 8.00 6.00a4.00a
19769.00 1.00 7.00 24.00a36.00 38.00 47.00 -----z38.00 25.00 10.00 12.00 -----z
19771.00a12.00 20.00 28.00 26.00 45.00 43.00 41.00 31.00 28.00 12.00 10.00 1.00a
19784.00a15.00 23.00 27.00 33.00 39.00 51.00 39.00a33.00 25.00 13.00 -5.00 -5.00b
1979-12.00a-11.00 17.00 22.00a33.00 40.00 49.00 50.00 42.00 30.00 10.00 12.00 -12.00b
1980-5.00a12.00 25.00 29.00 37.00 36.00a51.00 42.00a38.00 27.00 21.00 11.00 -5.00c
198120.00 15.00 27.00 27.00 31.00 38.00 40.00 49.00 36.00 28.00 19.00 9.00 9.00
1982-5.00 -8.00 21.00 22.00a30.00 39.00a46.00a49.00 38.00 27.00e14.00e5.00 -8.00m
1983-0.00a15.00 29.00 27.00 32.00 41.00a42.00 51.00a32.00 32.00 19.00 -8.00 -8.00c
1984-7.00 10.00 21.00 30.00 31.00 37.00 47.00 50.00 27.00a27.00a22.00 -0.00 -7.00b
1985-2.00 -12.00 6.00 26.00 32.00 41.00 53.00s46.00j31.00g24.00i-3.00f1.00b-----z
19865.00 11.00d30.00g30.00d31.00b45.00 39.00b47.00a36.00b30.00c16.00k15.00e-----z
19874.00c20.00e19.00a26.00b36.00 37.00d45.00j43.00m35.00i29.00j20.00l15.00o-----z
1988-8.00k8.00j24.00h27.00i30.00i38.00d43.00k45.00h31.00i32.00k13.00f-2.00 -----z
1989-3.00a-16.00c13.00 29.00 31.00a41.00 51.00 43.00 40.00a25.00 19.00 15.00b-16.00h
19909.00a1.00c19.00 32.00 32.00 33.00c42.00 46.00 44.00 26.00 22.00 -18.00 -18.00g
1991-1.00 18.00 23.00 25.00 31.00 38.00 46.00 49.00a37.00 17.00 15.00 16.00 -1.00a
199215.00a22.00 29.00 26.00 35.00a40.00a47.00g39.00 32.00f25.00c8.00e-2.00a-2.00y
1993-1.00c1.00c1.00 30.00f35.00f35.00e42.00b41.00a34.00 32.00e5.00b17.00 -----z
199415.00a12.00b22.00a29.00a35.00 39.00f46.00 50.00 44.00a24.00 5.00b9.00d5.00r
19954.00f15.00b23.00g26.00a37.00a35.00a47.00a42.00e35.00c30.00e19.00d19.00n-----z
19963.00j-10.00e25.00h30.00f32.00g38.00d47.00g45.00d-----z23.00o24.00i9.00j-----z
19977.00g15.00k20.00k24.00e32.00i43.00e44.00g52.00d41.00a26.00e24.00 14.00a-----z
199810.00e22.00d21.00d28.00d35.00c41.00c55.00e50.00f43.00g25.00g25.00c-3.00e-----z
199913.00j12.00a24.00a34.00b40.00a22.00f37.00a40.00a32.00 27.00a15.00b16.00d-----z
200012.00i20.00f24.00a32.00c28.00h36.00e39.00d48.00h35.00e32.00m15.00h12.00f-----z
20016.00p10.00l18.00f22.00f29.00f38.00e47.00a48.00c33.00b28.00a18.00a-4.00b-----z
20022.00h11.00a15.00i30.00e27.00h42.00e54.00g50.00e39.00i18.00e15.00e23.00a-----z
200320.00c20.00g29.00j30.00 34.00 46.00e53.00 52.00 37.00a18.00 17.00 16.00 -----z
20042.00g13.00 25.00b34.00e33.00c42.00d47.00d47.00f36.00a28.00a15.00l18.00l-----z
200511.00e15.00 22.00 26.00b36.00 39.00 49.00 49.00 39.00 6.00a19.00d6.00c6.00o
200615.00b7.00b18.00b30.00 32.00a49.00 57.00 46.00b39.00 21.00 11.00a8.00a7.00k
20076.00 11.00 22.00a27.00 32.00 45.00a56.00b51.00 37.00 34.00 21.00a10.00a6.00f
2008-2.00 4.00a20.00c24.00c29.00a38.00c55.00b49.00a41.00a29.00 28.00 8.00a-2.00p
20096.00 16.00 16.00b28.00 30.00b42.00 50.00 46.00 30.00 29.00a22.00 2.00 2.00e
201014.00 20.00 25.00 26.00 31.00 38.00 46.00 44.00 41.00 35.00 12.00c11.00 11.00c
20112.00 10.00 25.00 28.00 31.00 39.00 47.00 53.00 44.00 30.00 23.00 16.00 2.00
201214.00 17.00 18.00 29.00 32.00 38.00 51.00 48.00 42.00 29.00 19.00 15.00 14.00
20135.00 19.00 23.00 27.00a33.00c41.00 55.00 53.00 39.00 33.00 24.00 0.00 0.00d
201416.00 17.00 27.00 31.00 37.00 39.00 51.00 50.00 44.00 33.00 10.00a13.00a10.00b
20157.00 20.00 24.00a29.00 39.00 47.00a49.00 51.00 41.00 36.00 16.00 5.00 5.00b
20163.00 18.00 29.00 35.00 36.00 42.00 44.00 48.00 41.00 32.00a25.00 5.00 3.00a
20170.00c17.00a22.00a29.00 33.00a42.00a54.00b51.00 38.00 30.00 24.00 20.00k0.00t
Period of Record Statistics
MEAN0.94 8.09 17.62 26.73 32.07 39.02 46.82 45.45 35.57 26.53 16.70 6.18 -2.22
S.D.10.84 10.84 7.04 3.69 3.29 3.64 4.33 4.18 4.60 4.71 6.48 9.24 8.83
SKEW-0.40 -0.72 -0.80 -1.16 -0.01 -0.05 -0.01 -0.23 -0.35 -1.10 -1.10 -0.79 -0.21
MAX24.00 25.00 29.00 35.00 40.00 49.00 57.00 53.00 44.00 36.00 29.00 23.00 14.00
MIN-32.00 -20.00 -1.00 8.00 21.00 28.00 37.00 35.00 21.00 6.00 -6.00 -22.00 -20.00
YRS96 100 97 102 99 104 98 98 97 95 96 101 50