CHIEF JOSEPH DAM, WA

Average of Minimum Temperature (Degrees Fahrenheit)

(451400)

File last updated on March 29, 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
1949-----z-----z-----z-----z-----z-----z-----z-----z-----z36.32 35.27 20.81 30.80i
19500.13 22.18 30.74 36.27 43.65 52.95j55.85k56.68i48.33i41.18c28.13g29.50k29.02f
195120.86i23.61 24.87 35.00 45.03 50.40 54.68 54.26 47.33 39.84 27.27 15.07a37.94a
195212.68 20.48 27.39 36.80 43.90 50.37 54.58 53.61 48.50 38.03 26.50b27.45 36.69
195329.43a28.30a31.83b37.33 43.40f48.82b53.84 54.39 47.07a39.33a32.83 27.42 39.14a
195417.17a28.22a25.07a33.04b42.72b49.33 51.73a-----z47.20 34.77 35.34a24.13 35.34a
195522.42 19.93 24.66b34.20 40.17a49.90a54.84 52.68 47.17 38.29 23.37 16.52 35.34
195620.81 10.72 27.23 37.87 45.65 -----z55.94 53.03 45.38a38.35 27.41a25.00 35.22a
19577.17a18.64 31.03a38.73 48.60a51.07 53.29 52.90 51.70 40.39 30.30 29.00 37.74
195827.84 32.67a32.60a38.10 50.65 58.67 59.10 57.13 45.93 38.52 26.47 27.74 41.28
195922.48 20.46 31.73a38.38a44.77 52.66a56.87 55.29 48.67 37.65 24.00 26.81 38.31
196015.06 23.86 30.23 38.57 45.55 53.67 62.03 56.55 48.67 39.90 28.79a20.90 38.65
196124.52 31.04 32.68 39.13 46.29 55.33 60.84 60.03 46.00 35.81 22.43 21.13 39.60
196217.16 27.07 29.27a39.97 45.13 51.60 57.16 57.10 49.21a41.13 34.53 28.94 39.85
196316.74 31.81b34.06 40.07a46.74 53.53 57.50a58.10 52.97 41.74 33.33 23.00 40.80
196422.19 19.24 -----z37.87 44.94 53.13 57.68 54.74 46.03 36.61 32.93 19.87 38.66a
196523.26 24.46 27.81 42.10 44.94 53.10 58.90 59.68 45.97 37.71 33.30 24.74 39.66
196617.81 25.39 31.26 38.23 45.13 49.27 56.55 56.97 51.70 38.42 33.50 29.90 39.51
196728.32 30.43 31.26 35.87 45.23 54.87 58.77 59.94 53.13 39.61 30.66a21.42 40.79
196820.90 27.72 33.10 34.73 44.26 51.31a57.94 53.84 48.40 35.97 32.60 21.29 38.50
19697.61 17.46 28.20a40.63 47.43a55.93 56.68 52.87 48.62a35.57a30.34a28.23 37.47
197018.61 27.00a31.58 35.40 45.87 57.03 59.23 56.71 43.57 34.97 28.03 17.57a37.96
197119.30a25.50 28.32 39.00 48.42 51.00 57.90 58.52 43.17 34.94 32.00 14.65 37.73
197214.00 23.55 34.03 33.13 47.65 52.40 -----z57.94 44.57 35.23a36.17 21.13 36.34a
197318.06 24.75 34.23 39.97 45.23 -----z59.68 57.94 49.50 38.97 28.97 -----z39.73b
197417.94 29.33a31.29 39.93 42.71 53.86a57.37a58.10 46.60 34.81 33.13 27.61 39.39
197515.97 15.11 28.68 35.37 43.81 49.83 61.45 55.58 47.33 39.53a29.97 23.58 37.18
197622.71 26.82a28.97 37.73 44.74 49.17 56.94 56.65 50.27 36.77 28.37 23.52 38.55
197717.19 -----z33.29 39.03 43.23 56.59a57.52 62.29 46.00 36.35 27.90 22.90 40.21a
197821.57a28.11 33.81 39.70 44.10 52.87 59.71 57.68 48.70 34.45 25.34a14.29 38.36
19795.26 19.58b31.74 36.23 46.13 54.70 60.55 59.00a49.47 42.45 28.20 28.55 38.49
198010.32 25.72 30.52 39.63 48.29 49.50 54.48 52.74 48.90 37.48 33.45a24.45 37.96
198131.90 28.68 34.03 37.43 46.48 49.40 56.84 58.97 47.30 37.07a33.57 22.90 40.38
198217.16 23.29 32.10 34.00 43.61 56.11b56.24b56.41b48.52a37.16 26.32b21.55 37.71
198327.84 30.44a36.58 37.53 44.93a51.97 53.68 58.71 44.67 34.29 34.37 14.39 39.12
198423.13 29.07 35.39 37.60 43.55 51.07 55.29 56.10 42.77 32.73a30.30 10.30a37.27
198517.81 11.86 26.42 39.57 48.90a53.62a61.52 55.97 46.79a39.35 14.87 17.52 36.18
198620.65 22.00a35.06 38.23 46.03 55.69a56.29 60.94 48.50 39.81 32.37 26.35 40.16
198721.32 29.11 35.29 42.60 47.35 54.53 58.61 57.31b51.72a37.58 33.47 23.77 41.06
198818.23 26.25a33.19 41.27 44.68 52.37 58.00 56.06 49.70 41.39 33.43 23.77 39.86
198922.87 15.63a30.72b39.73 46.13 56.17 57.26 56.26 46.77 37.35 32.79a27.40a39.09
199028.67a21.25 32.19 41.97 45.61 52.47 61.45 60.00 53.15d38.69e34.23h17.05j43.55b
199116.00 31.57 -----z37.83 46.87a50.14b60.20a61.13a52.56c35.26 31.40 29.13a41.10a
199226.77 33.48 36.32 40.00a47.79c58.03 59.43a56.53a48.46b39.71 30.83 13.39 40.90
199313.87 19.88b27.68 36.23 48.29 51.33 54.45 54.73a44.80 38.07a19.07 25.71 36.18
199427.32 25.07 28.90 35.03 43.07a47.30 57.77 54.65 47.10 35.06 25.00b17.52 36.98
199523.16 28.57 32.42 38.57 48.00 53.17 59.29 53.10 51.21b37.52 31.87 26.74 40.30
199617.87 21.00 31.74 39.00 43.03 51.39b59.96c58.86b48.40 39.00b26.68e17.29c37.85
199718.83a22.28c32.30d38.57b49.75g56.75j64.67j67.11l57.15j44.26h32.60e26.82c28.57f
199822.79c32.48c34.06 39.38a48.23 54.33 62.37a58.19 53.86a36.55 35.23 22.16 41.64
199927.68 28.33a32.58 35.27 41.40a50.67 55.29 59.74 45.83 36.48 35.30 29.26 39.82
200022.45 25.38 32.97 38.93 44.84 52.87 55.87a54.97 47.10 37.13 25.55a20.70a38.23
200123.50a22.44a30.87 38.33 46.00 50.97 56.90 58.19 50.50 36.68 33.17 25.87a39.45
200225.81 25.50 27.37a37.97 44.48 52.13 59.48 55.03 47.60 31.65 30.13 31.29 39.04
200328.94 26.14 32.84 37.97 44.58 53.24a59.52 57.68 50.62a42.16 23.50 21.48 39.89
200423.74 26.62 34.74 38.33 46.00a53.40 60.58 60.58 48.50 40.48 30.33 28.16 40.96
200521.13 23.68 33.42 38.97 47.87 51.48a58.07a56.94 48.10 41.52 29.97 20.13 39.27
200628.68 24.50 31.65 39.10 45.65 53.80 60.23 55.45 48.17 38.06 28.63 20.52 39.54
200717.97a29.71 33.97 37.37 45.61 51.30 61.42 55.94 47.57 37.39 28.37 21.39 39.00
200815.05i23.31 30.97 34.17 46.55 50.27 57.52 56.52b46.21a38.26 32.23 14.77 39.16a
200917.29 19.88d26.87 36.25b44.77 53.87 59.61 58.16 49.60 35.23 30.57b15.52 37.30
201027.45 30.46 31.42 38.17 40.59d47.83 56.03 52.29 48.67 39.90 22.00a20.47a37.94
201119.10 19.18 30.52 32.93 40.94 47.73 48.97 55.74 49.76a38.81 25.70 21.26 35.89
201218.55 24.38 29.84 37.20 42.55 49.23 57.68 59.14b47.53 38.90a33.59a27.30a38.82
201320.32 25.79 29.13 33.48c37.96c53.63 60.77a57.52 50.38d35.45 25.90a18.42 37.40
201426.16 21.46 31.10 37.83 45.64c53.43 60.35 59.81 50.07 43.83a26.48a25.57a40.15
201527.32c32.16c36.52 34.79b46.80a57.28a62.29 59.13 47.93a43.65 29.10 21.91t43.36a
201625.61 26.90i35.00 41.19d47.90 53.00 58.06 56.10j46.42d42.27a38.13 15.48 40.31b
201716.17a19.00 32.68 38.40 46.13a51.86a57.70k58.50m48.36h35.54c31.24e23.71g33.88d
201825.59b20.23b30.13 39.73 51.10 51.37 60.32 58.32 52.91s34.77 30.40 27.29 39.02a
201925.94 17.14 24.26 40.40 48.58 52.43 58.10 59.45 52.07 35.45 29.33 27.16 39.19
202026.06 25.86 30.16 36.97 45.81 52.40 58.71 58.87 52.63 41.32 -----z-----z42.88b
Period of Record Statistics
MEAN20.67 24.53 31.23 37.84 45.44 52.44 57.88 56.96 48.35 37.92 29.80 22.67 38.80
S.D.6.11 4.99 2.92 2.24 2.36 2.52 2.63 2.38 2.50 2.56 4.24 4.90 1.48
SKEW-0.83 -0.44 -0.45 -0.35 -0.40 0.29 -0.68 -0.13 0.16 0.15 -0.87 -0.42 -0.22
MAX31.90 33.48 36.58 42.60 51.10 58.67 62.37 62.29 53.86 43.83 38.13 31.29 41.64
MIN0.13 10.72 24.26 32.93 37.96 47.30 48.97 52.29 42.77 31.65 14.87 10.30 35.34
YRS69 69 69 71 69 67 67 66 67 71 69 66 53