COULEE DAM 1 SW, WA

Average of Minimum Temperature (Degrees Fahrenheit)

(451767)

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
1934-----z-----z-----z-----z-----z-----z-----z60.22h48.70 43.40a38.46b28.87h43.52i
193523.79c28.59a31.79l-----z-----z55.60j59.00c57.97 53.03a39.42 29.31a28.79b39.99d
193626.42 6.85b31.07a40.89c50.81 55.37 58.97 58.28f50.73 42.16 26.27 29.42 38.09a
19375.00a18.07a34.35 40.00 47.03 54.00 61.19 56.11c52.27 44.62b35.69a29.68i40.76a
193828.41b29.15b33.71 40.66a46.77a55.90 62.79c56.37d55.21a44.06 29.69a25.61 42.36
193929.79g23.04b33.38e41.07b48.97 52.83a59.90a59.36c52.71b41.38b33.55a33.32c43.59a
194025.50e29.63b36.33a42.67 49.39 54.79a60.10 58.07a55.93c47.57a29.63c27.74d43.11
194129.61c30.30a35.73a43.21a48.94 54.55a60.03 59.00 49.69a42.33a34.58d30.24f44.36a
194221.74d29.54b30.80a39.83a45.42 50.52a56.13a58.83a51.28a39.39 29.77 24.94 39.85
194312.65 -----z28.57a40.60 42.58 49.60 57.58 55.35 50.97 42.26 33.37 24.06 39.78a
194421.26 25.03 28.90 38.43 46.32 53.03 59.03 55.81 50.63 43.52 33.30 23.19 39.87
194526.61 29.04 31.71 34.93 46.26 50.07 56.68 55.19 47.17 41.13 29.80 26.47a39.59
1946-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z-----z
194718.81 25.93 33.03 38.57 50.16 52.17 56.52 54.26 50.27 43.23 31.50 27.81 40.19
194822.35 23.28 29.84 36.13 45.61 55.83 53.90 54.73a48.07 37.87 30.41a15.61 37.80
19493.26 16.00 31.29 39.07a48.65 50.37 55.97 55.32 51.20 36.68 36.63 22.13 37.21
19501.03 22.11 30.45 35.30 42.90 51.73 57.29 -----z56.10 39.39 31.20 28.97 36.04a
195122.74 24.50 26.26 36.30 43.55 50.83 54.23 55.81 48.34a40.87 31.30 18.19 37.74
195216.68 24.83 30.55 39.27 46.77 52.23 58.42 57.58 53.17 43.06 28.30 27.68 39.88
195331.32 29.14 32.35 37.63 43.77 47.93 56.35 56.13 50.40 42.03 34.30 29.23 40.88
195419.16 30.43 27.23 34.90 45.45 48.63 54.68 53.71 49.43 37.39 37.90 25.87 38.73
195523.45 20.96 24.68 34.33 42.32 52.63 55.55 55.52 49.87 40.65 23.03 20.45 36.95
195623.58 15.52 28.45 38.83 47.68 50.13 59.48 56.71 49.73 40.42 28.97 25.52 38.75
19576.81 18.93a32.29 39.60 50.35 53.33 55.90 53.84 52.47 39.90 30.77 30.74 38.74
195829.84 34.93 32.26 38.17 51.35 57.27 61.45 61.52 49.07 40.77 28.87 28.16 42.80
195924.03 23.43 31.97 38.53 41.87 51.07 56.42 53.45 48.30 38.97 26.37 25.84 38.35
196016.81 25.48 29.55 36.67 42.84 51.00 59.68 54.71 48.50 41.29 31.13 23.32 38.41
196126.32 32.39 32.58 37.00 45.97 54.60 59.71 60.42 47.27 38.68 25.80 22.65 40.28
196217.87 26.86 28.35 38.87 43.10 49.80 56.77 54.94 50.10 42.06 35.37 30.48 39.55
196316.97 29.50 32.55 38.30 45.03 52.73 56.35 57.61 53.87 43.39 33.57 24.00 40.32
196425.55 25.07 28.68 35.70 44.55 52.00 57.10 53.74 47.03 39.29 31.59a18.81 38.26
196524.32 25.21 26.42 39.33 43.16 51.73 57.71 58.84 46.87 42.71 35.07 26.29 39.81
196622.94 26.82 30.71 38.27 45.52 49.63 56.61 56.97 53.20 40.71 34.37 30.19 40.49
196729.48 30.25 31.03 34.73 43.77 53.43 57.81 60.19 54.03 42.03 32.80 24.77 41.20
196824.87 29.45 34.84 36.23 46.74 53.24a60.84 56.55 51.40 39.81 33.67 22.35 40.83
196910.16 21.75 30.23 40.27 48.26 58.00 56.32 56.87 51.73 38.48 33.10 28.39 39.46
197021.00 28.54 31.10 35.93 46.19 57.70 61.94 58.42 44.20 38.03 29.00 22.35 39.53
197122.84 27.25 27.94 37.70 47.42 50.43 58.68 62.23 46.83 38.57a32.63 18.29 39.23
197216.23 24.24 33.16 34.47 48.26 53.63 56.71 59.45 47.17 38.23 34.47 20.94 38.91
197319.61 25.96 33.29 38.50 46.35 52.63 60.39 57.81 50.93 41.16 30.83 30.71 40.68
197420.52 30.86 33.23 40.77 42.87 55.47 57.19 58.74 51.47 39.74 34.00 28.87a41.14
197519.06 19.07 28.81 35.70 44.68 51.60 62.23 54.94 49.30 40.90 30.13 24.84 38.44
197624.06 27.41 28.90 37.83 44.39 49.73 57.19 54.13 51.87 38.45 30.23 25.35 39.13
197716.48 28.00 30.65 40.07 44.32 56.00a58.06 61.13 48.83 38.19 28.77 21.90 39.37
197821.65 27.82 34.39 39.97 45.00b53.13 58.97a56.77 47.83a38.61 26.47 15.74 38.86
19796.94 23.68 32.23 36.20 46.29 53.77 60.45 59.39 52.80 43.96c28.87 29.52 39.51
198013.87 26.97 30.71 41.33 47.79b50.23 57.77 54.45 49.60 41.29 34.50 28.07b39.72
198130.16 28.86 33.87 36.79a46.13 48.87 56.16 59.74 47.73 39.29 33.67 25.13 40.53
198219.32 26.71 31.71 33.23 43.20a55.93 56.40a57.77 49.69a40.00 27.13 23.97a38.76
198328.84 32.07 36.16 35.37 45.97 52.62d52.06 57.68c47.83 38.74d36.50 14.34b39.85
198424.00b28.45 34.29 36.34a41.71 49.87 57.10a57.39 46.70 35.61 32.20 14.43a38.17
198517.42 17.56a26.29 38.57 47.71 52.70 64.47a56.83a46.38a37.84 15.63 15.06 36.37
198622.39 22.44a34.84 36.87 45.47a57.17 54.67a61.35 45.10 40.06 33.86a26.33a40.05
198724.07a31.29 33.87 41.93 47.90 55.70 -----z-----z53.38a41.58 35.19c24.93b38.98b
198820.79c26.68a33.83a42.24a45.27a52.57 59.42 58.68 50.93 43.30a34.33 24.70a41.06
198924.70a17.75 30.77 40.07 45.48 56.46b58.39 57.67a51.43 41.23a34.80 27.61 40.53
199029.97 23.96a33.23 42.59a46.48 52.33 62.26 60.70a54.03 39.86c34.63 17.83a41.49
199117.81 31.93 30.65 37.75b46.23 50.28a59.06 61.06 52.80 38.90b31.90a28.52b40.57
199227.86c33.79 35.97a41.90a48.39 59.17 59.32 59.39 49.47 42.00 32.39b17.80a42.29
199313.84 19.79 30.68 38.67 -----z52.13 54.60a56.68 50.21a43.84 25.53 27.97a37.63a
199430.00 26.63a33.32 42.76a47.60a50.68b62.17b59.07a53.55a40.40a28.97a26.52 41.81
199524.77 29.79 32.17b38.73 48.52 52.86a60.32 54.35 52.47 39.68 33.13 26.10a41.07
199620.10b20.93 31.00 38.79a42.34b51.21a60.29 58.23a47.63 40.70a27.43 18.81 38.12
199720.37a22.18 32.00 36.87 48.10 51.60 57.53a60.60a52.07 40.63a31.87 26.16 40.00
1998-----z31.82 34.61 39.23 47.68 -----z63.65 60.90 54.30 40.68 37.17a24.87 43.49b
199929.23a29.46 32.37a34.27 42.45 50.83 55.52 60.63a48.63 39.90 37.03 29.81 40.85
200023.68 23.78b30.58 40.37 44.68 52.85c55.97b56.58 48.61b39.93b27.21b20.43c38.72
200120.58 19.71 29.84 36.63 46.16 46.28a55.16 56.73a48.47 37.97b32.80 26.74 38.09
200226.90a26.78a23.80a36.83 41.73a51.57 57.60a52.13a47.13 33.00a31.93 29.27a38.22
200328.97 26.00 30.50a38.90 44.50a54.48a60.58 55.19 52.53 43.87 26.23 24.38b40.51
200422.68f25.71a34.00b39.04d44.10a52.60 60.23 60.52 47.62a40.13a31.21a28.28b42.13a
200521.37a24.32 32.68 38.23 47.58 51.24a56.55k57.77 51.33 44.39 30.28e19.42 38.06a
200630.10 25.04 31.23a39.40 44.35 49.50 59.16 56.16 50.53 38.84 29.27 22.52 39.67
200719.97 28.89 33.55 36.93 44.55 52.00b62.43a57.68 49.63 38.45 29.30 23.00 39.70
200816.84 24.93 30.32 32.37 47.03b49.59a59.10a58.10 49.17 40.48 32.67 17.17a38.15
200917.65 21.61 28.48 35.33 44.10 53.48a60.23 58.58 51.77 37.50a32.77 19.23 38.39
201028.62b32.19a32.77 38.38a41.77 50.67 57.58 55.48 50.53 42.55 28.70 25.90 40.43
201126.32 21.86 32.90 34.30 42.68 49.83 53.74 57.77 51.55a40.39 28.53 22.39 38.52
201220.55 26.07 31.13 37.87 44.35 50.53 59.26 58.97 50.83a40.97a35.40 28.61 40.38
201321.13 26.32 31.71 37.50 46.74 52.97 61.58 60.10 53.20 37.45 29.87 19.84 39.87
201425.55 20.39 31.94 38.27 46.29 53.57 62.61 60.84 52.20 45.77 28.77 26.87 41.09
201526.48 32.18 36.00 37.07 49.67a59.47 63.03 60.26 49.53 45.39 29.83 26.03 42.91
201626.03 29.86 34.94 43.30 49.48 53.67 58.55 59.13 48.20 42.61 38.77 17.42 41.83
201715.39 20.29 33.10 37.97 46.30a53.17 60.45 60.77 52.07 37.71 32.97 22.65 39.40
201826.48 22.96 30.84 38.27 50.94 51.60 61.10 58.81 48.80 39.61 31.07 27.71 40.68
201925.58 15.75 24.13 39.80 49.26 53.67 58.10 60.45 51.90 35.77 29.93 27.65 39.33
202026.81 26.52 30.03 37.57 46.58 52.13 59.16 59.87 52.77 39.90 30.90 26.32 40.71
202128.77 23.82 30.42 37.87 44.65 58.87 64.68 60.55 51.50 40.48 33.44c21.90 41.41
202220.93a20.32 33.42 34.47 41.77 52.38a60.71 62.71c53.73 45.03a23.83a15.48 38.73
202326.58 24.14 28.87a36.33 52.17a54.87 60.87 60.48b51.97a41.10a31.64b30.71 41.64
202422.29 31.07b31.48d-----z-----z-----z-----z-----z-----z-----z-----z-----z28.28i
Period of Record Statistics
MEAN21.87 25.50 31.42 38.15 45.97 52.67 58.62 57.80 50.44 40.58 31.35 24.40 39.81
S.D.6.32 4.82 2.65 2.38 2.50 2.60 2.60 2.38 2.45 2.43 3.67 4.45 1.41
SKEW-1.12 -0.80 -0.61 0.05 0.24 0.51 0.06 -0.15 -0.04 0.08 -0.87 -0.54 0.12
MAX31.32 34.93 36.33 43.30 52.17 59.47 64.68 62.71 56.10 47.57 38.77 33.32 43.11
MIN1.03 6.85 23.80 32.37 41.71 46.28 52.06 52.13 44.20 33.00 15.63 14.34 36.37
YRS86 88 88 87 86 86 86 85 89 89 89 86 76