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Boise Weather in 2018

Historical record of Boise, Idaho weather for the year 2018 based on NOAA data.
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2018 Boise Weather Extremes
Highest temperature 110 °F August 10
Lowest temperature 9 °F February 20
Highest daily low 76 °F July 31
Lowest daily high 27 °F December 6
Most daily precipitation 0.9 inches October 9
Most daily snow 4.9 inches February 22
Total annual precipitation 10.7 inches -
Total annual snow 15.3 inches -
January 2018 Boise Weather
Day High (°F) Low (°F) Precip. (inches) Snow (inches)
35 19 0.00 0.0
34 18 0.00 0.0
35 20 0.00 0.0
36 19 0.00 0.0
41 26 0.01 0.0
39 31 0.08 0.0
45 26 0.00 0.0
47 28 0.00 0.0
47 35 0.46 0.0
43 33 0.01 0.0
47 34 0.08 0.0
52 36 0.01 0.0
50 33 0.00 0.0
50 33 0.00 0.0
47 30 0.00 0.0
44 32 0.06 0.0
50 29 0.00 0.0
58 39 0.24 0.0
45 30 0.20 0.0
41 27 0.00 0.0
44 25 0.02 0.0
45 31 0.08 0.0
43 29 0.00 0.0
49 40 0.00 0.0
46 33 0.09 0.1
44 32 0.00 0.0
41 34 0.02 0.0
54 32 0.00 0.0
52 33 0.00 0.0
59 37 0.00 0.0
44 31 0.00 0.0
February 2018 Boise Weather
Day High (°F) Low (°F) Precip. (inches) Snow (inches)
49 34 0.00 0.0
59 42 0.00 0.0
61 37 0.00 0.0
60 42 0.00 0.0
54 36 0.00 0.0
52 29 0.00 0.0
58 33 0.00 0.0
60 40 0.00 0.0
51 36 0.00 0.0
45 26 0.00 0.0
43 26 0.00 0.0
46 25 0.00 0.0
45 19 0.00 0.0
43 32 0.24 0.5
41 30 0.00 0.0
40 26 0.00 0.0
53 31 0.00 0.0
47 24 0.00 0.1
33 15 0.00 0.0
28 9 0.00 0.0
37 22 0.00 0.0
33 14 0.24 4.9
30 10 0.00 0.0
33 22 0.07 1.5
36 13 0.01 0.3
39 22 0.00 0.1
34 11 0.00 0.0
39 23 0.00 0.0
March 2018 Boise Weather
Day High (°F) Low (°F) Precip. (inches) Snow (inches)
47 32 0.09 0.1
44 32 0.02 0.0
42 27 0.01 0.0
42 23 0.02 0.4
47 26 0.00 0.0
51 28 0.00 0.0
56 26 0.00 0.0
60 35 0.00 0.0
55 38 0.07 0.0
58 31 0.00 0.0
59 40 0.00 0.0
63 37 0.00 0.0
69 38 0.10 0.0
55 38 0.54 0.0
51 37 0.01 0.0
49 36 0.01 0.0
48 34 0.11 0.0
51 35 0.00 0.0
53 33 0.00 0.0
52 40 0.00 0.0
62 42 0.15 0.0
59 41 0.43 0.0
53 34 0.00 0.0
49 38 0.00 0.0
45 32 0.33 2.1
48 26 0.00 0.0
57 31 0.00 0.0
59 38 0.00 0.0
58 36 0.00 0.0
65 39 0.00 0.0
61 43 0.00 0.0
April 2018 Boise Weather
Day High (°F) Low (°F) Precip. (inches) Snow (inches)
60 35 0.01 0.0
55 30 0.03 0.0
53 29 0.00 0.0
62 42 0.00 0.0
61 48 0.09 0.0
59 48 0.14 0.0
65 50 0.28 0.0
55 40 0.01 0.0
62 34 0.00 0.0
70 45 0.00 0.0
64 43 0.00 0.0
52 33 0.19 0.2
54 34 0.00 0.0
61 45 0.01 0.0
69 46 0.00 0.0
56 39 0.23 0.0
53 32 0.00 0.0
63 36 0.00 0.0
68 42 0.00 0.0
69 40 0.00 0.0
70 44 0.00 0.0
65 40 0.00 0.0
65 37 0.00 0.0
69 42 0.00 0.0
76 45 0.00 0.0
81 47 0.00 0.0
90 50 0.00 0.0
67 48 0.00 0.0
60 43 0.00 0.0
62 38 0.02 0.0
May 2018 Boise Weather
Day High (°F) Low (°F) Precip. (inches) Snow (inches)
65 38 0.00 0.0
69 36 0.00 0.0
75 40 0.00 0.0
82 53 0.00 0.0
81 55 0.00 0.0
83 52 0.00 0.0
78 48 0.00 0.0
85 51 0.00 0.0
79 56 0.00 0.0
69 48 0.00 0.0
59 43 0.19 0.0
66 45 0.00 0.0
67 49 0.51 0.0
77 47 0.00 0.0
78 56 0.19 0.0
76 55 0.46 0.0
69 55 0.01 0.0
75 54 0.00 0.0
80 50 0.00 0.0
72 56 0.20 0.0
78 54 0.00 0.0
80 55 0.00 0.0
81 59 0.05 0.0
85 56 0.00 0.0
89 56 0.00 0.0
73 54 0.06 0.0
83 50 0.19 0.0
84 57 0.00 0.0
85 54 0.00 0.0
79 52 0.02 0.0
69 53 0.00 0.0
June 2018 Boise Weather
Day High (°F) Low (°F) Precip. (inches) Snow (inches)
70 45 0.00 0.0
83 50 0.00 0.0
92 58 0.00 0.0
87 58 0.00 0.0
83 53 0.00 0.0
90 55 0.00 0.0
87 63 0.07 0.0
90 55 0.00 0.0
79 48 0.04 0.0
65 44 0.00 0.0
71 52 0.00 0.0
83 46 0.00 0.0
92 58 0.00 0.0
76 54 0.00 0.0
78 54 0.00 0.0
77 53 0.00 0.0
63 51 0.13 0.0
74 55 0.01 0.0
78 55 0.00 0.0
88 58 0.00 0.0
82 58 0.00 0.0
89 59 0.00 0.0
80 59 0.00 0.0
88 53 0.00 0.0
94 65 0.00 0.0
83 56 0.00 0.0
93 56 0.00 0.0
82 61 0.00 0.0
79 54 0.00 0.0
82 53 0.00 0.0
July 2018 Boise Weather
Day High (°F) Low (°F) Precip. (inches) Snow (inches)
85 56 0.00 0.0
82 57 0.00 0.0
75 50 0.00 0.0
97 57 0.00 0.0
102 67 0.00 0.0
94 67 0.00 0.0
96 68 0.00 0.0
99 64 0.00 0.0
102 67 0.00 0.0
90 66 0.00 0.0
91 58 0.00 0.0
93 59 0.00 0.0
99 63 0.00 0.0
100 66 0.00 0.0
97 64 0.00 0.0
98 70 0.10 0.0
99 63 0.00 0.0
99 68 0.00 0.0
98 62 0.00 0.0
98 63 0.00 0.0
97 59 0.00 0.0
93 60 0.00 0.0
100 61 0.00 0.0
102 71 0.00 0.0
101 69 0.00 0.0
100 66 0.00 0.0
100 66 0.00 0.0
98 67 0.00 0.0
98 63 0.00 0.0
100 70 0.00 0.0
98 76 0.00 0.0
August 2018 Boise Weather
Day High (°F) Low (°F) Precip. (inches) Snow (inches)
100 71 0.00 0.0
96 66 0.00 0.0
88 61 0.00 0.0
87 56 0.00 0.0
90 60 0.00 0.0
93 63 0.00 0.0
96 62 0.00 0.0
102 67 0.00 0.0
106 69 0.00 0.0
110 75 0.00 0.0
104 71 0.00 0.0
88 63 0.00 0.0
94 57 0.00 0.0
95 59 0.00 0.0
98 63 0.00 0.0
99 71 0.00 0.0
94 72 0.00 0.0
91 60 0.00 0.0
97 65 0.00 0.0
90 62 0.00 0.0
81 55 0.00 0.0
86 59 0.00 0.0
89 59 0.00 0.0
84 59 0.00 0.0
86 52 0.00 0.0
74 56 0.00 0.0
73 52 0.01 0.0
78 46 0.00 0.0
88 54 0.00 0.0
87 62 0.00 0.0
80 58 0.00 0.0
September 2018 Boise Weather
Day High (°F) Low (°F) Precip. (inches) Snow (inches)
82 52 0.00 0.0
85 54 0.00 0.0
89 55 0.00 0.0
88 54 0.00 0.0
96 56 0.00 0.0
95 65 0.00 0.0
90 61 0.00 0.0
85 63 0.00 0.0
84 52 0.00 0.0
83 53 0.00 0.0
73 51 0.00 0.0
71 48 0.00 0.0
73 53 0.00 0.0
83 49 0.00 0.0
77 58 0.00 0.0
76 50 0.00 0.0
78 47 0.00 0.0
79 44 0.00 0.0
74 45 0.00 0.0
73 44 0.00 0.0
83 49 0.00 0.0
83 55 0.00 0.0
70 48 0.00 0.0
69 38 0.00 0.0
69 41 0.00 0.0
75 44 0.00 0.0
82 48 0.00 0.0
80 52 0.00 0.0
81 52 0.00 0.0
72 55 0.00 0.0
October 2018 Boise Weather
Day High (°F) Low (°F) Precip. (inches) Snow (inches)
71 51 0.00 0.0
75 57 0.00 0.0
73 53 0.01 0.0
60 43 0.33 0.0
62 39 0.01 0.0
58 46 0.08 0.0
62 39 0.00 0.0
61 36 0.00 0.0
54 43 0.95 0.0
54 38 0.00 0.0
58 36 0.00 0.0
63 38 0.00 0.0
60 36 0.00 0.0
54 28 0.00 0.0
57 32 0.00 0.0
63 38 0.00 0.0
65 37 0.00 0.0
67 42 0.00 0.0
69 41 0.00 0.0
72 43 0.00 0.0
69 44 0.00 0.0
73 47 0.00 0.0
69 50 0.00 0.0
67 48 0.00 0.0
64 41 0.00 0.0
71 51 0.01 0.0
67 44 0.00 0.0
67 49 0.00 0.0
57 40 0.01 0.0
54 32 0.00 0.0
49 37 0.01 0.0
November 2018 Boise Weather
Day High (°F) Low (°F) Precip. (inches) Snow (inches)
60 42 0.00 0.0
60 43 0.02 0.0
55 34 0.00 0.0
60 42 0.01 0.0
53 31 0.00 0.0
52 34 0.00 0.0
49 30 0.00 0.0
46 21 0.00 0.0
49 25 0.00 0.0
51 26 0.00 0.0
44 20 0.00 0.0
47 26 0.00 0.0
50 25 0.00 0.0
48 25 0.00 0.0
53 28 0.00 0.0
53 28 0.00 0.0
49 29 0.00 0.0
48 25 0.00 0.0
46 24 0.00 0.0
47 25 0.00 0.0
43 24 0.00 0.0
56 33 0.07 0.0
45 33 0.18 0.0
45 29 0.02 0.0
46 27 0.00 0.0
44 26 0.00 0.0
47 34 0.13 0.0
48 33 0.01 0.0
40 30 0.00 0.0
42 33 0.36 0.0
December 2018 Boise Weather
Day High (°F) Low (°F) Precip. (inches) Snow (inches)
40 32 0.30 0.4
34 28 0.39 3.4
38 22 0.00 0.0
32 17 0.00 0.0
27 13 0.00 0.0
27 11 0.00 0.0
29 14 0.00 0.0
30 17 0.00 0.0
37 28 0.00 0.0
34 25 0.00 0.0
39 30 0.00 0.0
41 28 0.06 0.1
38 26 0.00 0.0
44 26 0.01 0.0
42 32 0.00 0.0
49 32 0.00 0.0
50 37 0.14 0.0
45 38 0.15 0.0
50 34 0.00 0.0
51 31 0.00 0.0
41 29 0.01 0.0
38 22 0.00 0.0
38 32 0.05 0.0
44 35 0.14 0.0
44 28 0.00 0.0
39 22 0.03 0.3
37 27 0.01 0.2
34 23 0.00 0.0
36 28 0.03 0.3
41 30 0.08 0.2
37 19 0.00 0.0
Weather Station Details
Years Station Coordinates
1940–2022 location