RICHLAND, WA

Average of Minimum Temperature (Degrees Fahrenheit)

(457015)

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
1944-----z-----z-----z-----z50.62r53.57 60.74 57.06 50.87 42.00 33.43b25.67j49.61f
194532.52 33.00 35.58 40.21a49.81 53.76a60.45 59.13 48.97 41.23 33.63 27.97 43.02
194626.50a29.50 36.70a40.33 48.10 53.90 60.84 58.04f49.93 39.63a30.63 28.65 40.43a
194722.84 28.07a35.16 41.38a51.84 54.27 60.74 57.19 52.87 47.70a36.80 30.42 43.27
194826.19 24.43a-----z-----z-----z58.27 54.68 57.16 49.92f34.84l33.07 22.29 39.44e
19492.30a23.21 33.19 38.70 50.71 51.57 58.35 57.58 51.43 35.23 36.70 29.03 39.00
19507.77 22.71 33.00 37.60 43.65 54.67 57.13 59.58 49.17 42.19 35.66a34.19 39.78
195128.33a28.39 30.84 38.60 47.84 55.07 60.47a57.84 50.53 43.87 32.97 23.68 41.54
195222.23 31.34 35.65 42.43 51.03 56.30 61.13 64.39 52.80 43.87 27.63 32.61 43.45
195339.29 34.43 38.19 41.83 48.29 53.10 59.71 59.74 52.10 43.58 37.10 35.29 45.22
195425.06 36.11 31.87 41.07 48.74 53.73 59.26 58.00 49.03 37.48 39.27 30.35 42.50
195528.68 29.36 32.32 38.33 45.23 55.60 58.71 57.19 51.30 43.61 27.27 25.90 41.13
195627.48 21.17 35.35 41.97 51.39 52.37 61.29 57.23 50.90 42.35 31.60 30.61 41.98
195713.13 28.25 35.58 42.10 52.10 56.17 59.58 57.87 53.13 42.13 31.70 34.67a42.20
195833.06 38.79 34.42 42.27 54.52 60.23 65.77 62.94 53.73 40.61 35.90 32.26 46.21
195927.87 30.86 35.35 41.50 46.16 54.63 59.77 56.71 52.17 42.58 29.10 29.77 42.21
196018.52 31.03 35.32 42.87 47.90 54.53 63.16 58.10 51.07 44.06 34.83 26.87 42.36
196130.81 39.32 38.94 42.43 48.87 58.07 61.23 62.87 48.93 39.94 26.04b29.23 43.89
196224.58 30.36 33.81 43.30 48.06 53.47 59.19 57.55 51.50 43.23 38.03 34.45 43.13
196320.94 32.68 35.45 41.90 48.81 55.60 57.84 59.00 55.33 44.84 38.30 27.77 43.20
196431.68 28.21 33.06 39.10 46.29 54.53 59.23 56.26 50.33 41.19 35.33 24.03 41.60
196530.84 33.57 30.58 43.40 46.68 54.50 59.68 60.87 50.20 45.23 40.03 29.26 43.74
196631.68 32.86 35.23 41.66a48.06 52.87 57.13 57.29 53.30 40.97 36.93 33.13 43.42
196735.06 34.82 35.42 37.80 46.48 55.77 58.52 59.45 53.00 43.68 34.33 28.61 43.58
196829.32 33.14 37.35 38.87 49.00 54.73 60.35 57.00 52.13 40.35 35.53 26.71 42.88
196916.70a26.89 33.16 41.83 50.03 59.30 56.87 52.77 49.97a36.03 31.67 30.77a40.50
197026.61 32.18 31.83a36.87 45.60a56.37 60.03 54.83a45.63 35.48 31.20 25.10 40.14
197129.07a28.04 30.68 38.43 47.97 50.77 57.68 59.97 45.20 38.10 32.57 25.52 40.33
197225.81 28.93 35.45 36.87 48.81 54.83a57.93a57.57a45.87 36.68 33.63 22.48 40.40
197321.55 28.96 34.32 38.53 46.26 52.18b57.35 54.61 50.53 41.68 35.47 34.35 41.32
197423.29 34.75 35.94 42.87 47.16 56.27 59.03 59.23 51.23 39.26 37.47 32.10 43.22
197528.48 26.48a33.77 36.83 46.35 53.13 62.48 57.10 49.13 43.87 33.27 29.48 41.70
197627.61 30.55 32.10 39.63 45.81 51.67 57.84 57.94 53.20 38.61 31.43 24.00 40.87
197722.57a32.75 36.90 43.10a47.81 59.47 60.71 64.87 51.41a39.97 34.50 31.42 43.79
197828.90 33.75 38.19 43.20 47.61 56.47 61.20a59.48 51.90 37.61 26.57 23.65 42.38
19797.94 28.68 34.97 41.77 49.61 55.07 61.26 61.16 54.03 45.65 32.17 33.45 42.15
198020.03 30.55 36.58 42.73 49.97 54.40 60.48 56.65 -----z41.35 36.37 32.16 41.93a
198133.97 32.50 37.29 42.43 49.00 54.47 58.26 60.23 51.33 39.32 34.00 28.06 43.41
198226.16 31.07a34.94 38.40 46.10a55.87 58.13 57.90 50.79a39.32 29.30 26.57c41.21
198331.81 34.71 40.20a38.90 48.32 53.80 59.48d62.60a45.57 37.55 38.13 18.00 42.42
198425.06 32.41 38.35 39.57 43.39 52.23 58.34b57.24b47.48a37.45 33.83a22.43a40.65
198523.10 22.75 32.81 42.59a49.03 54.60 61.58 56.39 48.40 41.48 22.93 19.68 39.61
198628.29 32.18 38.94 38.10 47.42 57.37 56.53a61.68 51.90a41.81 38.80 29.55 43.55
198726.29 32.19a38.42 44.07 50.94 54.93 62.33p56.65 50.97 37.94 36.37 27.55 41.48a
198826.69b29.38 35.58 42.93 47.61 54.67 58.68 56.07a49.47 43.74 38.28a27.33a42.54
198930.00a18.37a35.52 43.60 47.87 56.24a58.17a57.57a49.33 40.52 37.17a29.32 41.97
199034.57a28.54 33.80a43.43 47.29 55.41a61.35 61.29 54.27 41.16 38.37 19.00a43.21
199121.23 33.07 32.97 40.90 47.13 51.30 59.32 61.23a50.97a38.67a35.60 32.83a42.10
199231.84 33.62 35.93b42.63c48.45 58.00 60.03 57.35 48.90 41.10 35.00a24.35 43.10
199317.76b24.68 31.68 41.90a52.30a54.37 56.32 56.84 49.07 41.52 25.67 32.10 40.35
1994-----z28.96a35.31b44.80 50.14b53.37 60.65 -----z-----z42.00 31.97a29.77a41.88c
199528.32 33.33a-----z41.00d49.81 54.87 60.29 55.74 53.83 -----z37.20 29.52 44.39b
199624.26 23.76 33.87a42.57 45.13 51.76a59.00 56.87 49.40 41.65 31.14a23.86c40.27
199726.32 31.18 36.87 40.07 49.30a53.77 58.19 61.24b52.70 41.34b35.15c29.26 42.95
199829.32 33.07 36.81 39.00 49.13 55.34a64.39 60.10 54.40 39.87 -----z27.35 44.43a
199932.68 35.00 35.23 37.17a44.35 53.73 56.74 61.39 46.90 39.68 38.67 33.48 42.92
200028.81 31.07 34.45 41.87 49.39 53.80 58.16 58.06 50.40 40.45 28.97 27.26 41.89
200129.39 28.36 33.83a40.73 47.68 52.63 59.42 60.23 -----z42.33a35.40 30.97 41.91a
200232.39 28.04 33.42 41.10 46.29 55.13 60.90 57.71 50.07 36.81 33.27 34.10 42.43
200334.29 30.18 39.61 42.43 48.03 54.93 60.58 59.77 52.27 45.87 30.10 29.23 43.94
200425.90 29.52 38.06 40.97 49.94 55.73 62.03 61.77 51.70 44.13 32.13 30.73a43.55
200526.42 25.04 35.94 42.43 51.00 54.73 59.94 58.35 49.83 45.03 33.70 24.61 42.25
200634.45 27.43 35.39 41.11b47.50a55.73 61.81 56.97 50.43 40.63a34.67 26.42 42.71
200723.23 32.11 36.87 40.43 47.16 53.90 62.83a57.23 50.70 41.58 32.33 29.45 42.32
200823.90 32.35c33.74 36.73 49.42 52.30 59.68 58.19 50.63 39.97 35.60 20.94 41.12
200926.84 28.36 33.06 39.20 46.97 56.57 61.10 60.23 52.43 40.74 33.40 19.26 41.51
201033.28b33.48a34.55 41.73 44.90 53.67 59.13 59.10 53.33 43.68 31.70 29.43a43.16
201128.71 27.96 35.06 37.07 44.19 52.83a56.13 59.48 52.52a45.23 30.33 25.74 41.27
201225.77 30.62 35.42 41.69a46.19 52.87 59.87 58.52 50.43 42.13 37.00a32.19 42.73
201327.06 29.89a35.68 41.07 48.52 55.23 61.32 61.94 56.23 37.87 30.27 20.27a42.11
201429.90 28.54 35.39c42.00a49.39 54.87 63.29 62.32 53.40 47.29 31.43 30.48 44.03
201530.71 33.93 38.35 40.20 51.23 60.63 63.77 60.65 50.13 47.39 33.17 30.29 45.04
201629.87 34.48 37.39 45.33 51.00 55.77 60.52 59.58 51.63 46.03 39.10 22.23 44.41
201717.65 26.04 38.42 41.23 48.10 55.53 61.74 59.61 53.10 40.29 34.90 26.87 41.96
201832.65 30.39 33.55 42.37 53.32 54.90a61.03 59.48 50.83 41.58 33.93 31.71 43.81
201930.68 19.36 27.00 44.77 50.81 56.17 59.77 61.52 54.63 37.29 29.93a30.06 41.83
202032.55 29.93 34.23a40.97 49.45 56.47 62.00 62.13 54.77 44.55 35.20 31.07b44.44
202131.86b27.27b34.47a41.30 48.87 61.00 64.53a61.68 53.25b43.77 39.43 30.23a44.81
202226.10 27.14 38.68 37.73 46.71 55.07 62.52 63.77 55.13 46.57a27.89b20.19 42.29
202328.17a28.54 32.97 40.07 53.26 57.37 62.47a62.68 54.13 43.23 32.50 33.10a44.04
202424.68 34.07 35.56d-----z-----z-----z-----z-----z-----z-----z-----z-----z31.43i
Period of Record Statistics
MEAN26.69 30.04 35.10 40.91 48.39 54.94 59.97 59.02 51.19 41.49 33.70 28.22 42.45
S.D.6.28 3.96 2.34 2.10 2.25 2.07 2.07 2.38 2.32 2.89 3.59 4.22 1.42
SKEW-1.43 -0.55 -0.37 -0.32 0.20 0.73 0.17 0.24 -0.42 -0.01 -0.54 -0.56 -0.06
MAX39.29 39.32 40.20 45.33 54.52 61.00 65.77 64.87 56.23 47.70 40.03 35.29 46.21
MIN2.30 18.37 27.00 36.73 43.39 50.77 54.68 52.77 45.20 35.23 22.93 18.00 39.00
YRS79 80 78 78 78 80 79 78 76 78 79 79 71