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Boise Weather in 2021

Historical record of Boise, Idaho weather for the year 2021 based on NOAA data.
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2021 Boise Weather Extremes
Highest temperature 107 °F July 6
Lowest temperature 9 °F December 31
Highest daily low 80 °F July 19
Lowest daily high 24 °F December 28
Most daily precipitation 0.8 inches July 31
Most daily snow 5.5 inches February 13
Total annual precipitation 12.4 inches -
Total annual snow 30.2 inches -
January 2021 Boise Weather
Day High (°F) Low (°F) Precip. (inches) Snow (inches)
43 31 0.00 0.0
46 33 0.01 0.1
50 37 0.24 0.0
48 37 0.19 0.0
44 32 0.00 0.0
45 29 0.00 0.0
43 33 0.20 0.3
40 28 0.03 0.1
41 30 0.01 0.0
39 28 0.00 0.0
41 24 0.00 0.0
43 29 0.12 0.0
50 29 0.10 0.0
47 28 0.00 0.0
38 27 0.00 0.0
42 24 0.00 0.0
43 28 0.00 0.0
45 26 0.00 0.0
43 21 0.00 0.0
44 23 0.00 0.0
42 29 0.02 0.0
38 32 0.04 0.0
41 25 0.00 0.0
40 24 0.00 0.0
36 26 0.00 0.0
38 22 0.00 0.0
47 32 0.00 0.0
52 40 0.00 0.0
42 34 0.28 0.0
49 31 0.00 0.0
52 34 0.00 0.0
February 2021 Boise Weather
Day High (°F) Low (°F) Precip. (inches) Snow (inches)
55 35 0.00 0.0
59 37 0.12 0.0
40 31 0.01 0.0
42 25 0.00 0.0
50 35 0.01 0.0
51 28 0.00 0.0
48 31 0.00 0.0
42 22 0.00 0.0
46 26 0.00 0.0
50 21 0.00 0.0
37 27 0.14 1.0
32 27 0.29 4.4
31 21 0.52 5.5
33 14 0.00 0.0
39 32 0.30 0.9
40 33 0.05 0.0
38 26 0.00 0.0
37 20 0.04 1.0
43 31 0.09 0.3
41 30 0.02 0.2
44 24 0.00 0.0
51 33 0.00 0.0
49 32 0.00 0.0
43 26 0.00 0.0
39 24 0.00 0.0
41 27 0.01 0.3
41 25 0.02 0.6
41 20 0.00 0.0
March 2021 Boise Weather
Day High (°F) Low (°F) Precip. (inches) Snow (inches)
52 27 0.00 0.0
56 30 0.00 0.0
60 31 0.00 0.0
63 31 0.00 0.0
68 39 0.00 0.0
57 35 0.04 0.0
57 33 0.00 0.0
54 34 0.02 0.0
51 28 0.00 0.0
52 25 0.00 0.0
56 25 0.00 0.0
55 26 0.00 0.0
59 26 0.00 0.0
66 34 0.00 0.0
62 36 0.00 0.0
56 33 0.00 0.0
62 32 0.00 0.0
69 41 0.00 0.0
59 47 0.19 0.0
54 37 0.00 0.0
51 31 0.00 0.0
46 33 0.46 0.5
53 31 0.00 0.0
48 27 0.05 0.0
50 35 0.19 0.0
56 32 0.00 0.0
62 32 0.00 0.0
75 41 0.00 0.0
61 31 0.00 0.0
48 27 0.00 0.0
60 29 0.00 0.0
April 2021 Boise Weather
Day High (°F) Low (°F) Precip. (inches) Snow (inches)
75 36 0.00 0.0
73 42 0.00 0.0
78 46 0.00 0.0
73 47 0.00 0.0
53 40 0.00 0.0
60 33 0.00 0.0
71 40 0.00 0.0
55 35 0.00 0.0
62 28 0.00 0.0
61 36 0.00 0.0
52 28 0.00 0.0
57 26 0.00 0.0
57 33 0.00 0.0
58 38 0.00 0.0
63 40 0.00 0.0
63 42 0.00 0.0
67 39 0.00 0.0
75 40 0.00 0.0
65 43 0.00 0.0
61 34 0.00 0.0
66 38 0.00 0.0
69 35 0.00 0.0
66 38 0.00 0.0
60 48 0.53 0.0
56 43 0.07 0.0
47 40 0.36 0.0
62 37 0.00 0.0
71 41 0.00 0.0
82 48 0.00 0.0
83 53 0.00 0.0
May 2021 Boise Weather
Day High (°F) Low (°F) Precip. (inches) Snow (inches)
75 51 0.05 0.0
64 46 0.00 0.0
67 40 0.00 0.0
70 43 0.00 0.0
77 43 0.00 0.0
90 53 0.00 0.0
70 47 0.00 0.0
60 37 0.00 0.0
63 36 0.00 0.0
67 38 0.00 0.0
70 41 0.00 0.0
82 46 0.00 0.0
82 53 0.00 0.0
81 53 0.00 0.0
77 52 0.00 0.0
85 51 0.00 0.0
86 58 0.00 0.0
73 54 0.00 0.0
61 46 0.00 0.0
63 40 0.00 0.0
55 42 0.03 0.0
57 42 0.45 0.0
63 42 0.00 0.0
69 50 0.01 0.0
66 47 0.23 0.0
71 48 0.00 0.0
82 52 0.00 0.0
70 51 0.00 0.0
77 46 0.00 0.0
83 48 0.00 0.0
87 53 0.00 0.0
June 2021 Boise Weather
Day High (°F) Low (°F) Precip. (inches) Snow (inches)
90 57 0.00 0.0
96 63 0.00 0.0
103 64 0.00 0.0
94 66 0.00 0.0
86 61 0.00 0.0
77 49 0.00 0.0
80 47 0.00 0.0
81 54 0.00 0.0
79 56 0.00 0.0
63 45 0.77 0.0
78 51 0.00 0.0
83 61 0.00 0.0
97 64 0.00 0.0
94 65 0.00 0.0
89 61 0.00 0.0
82 52 0.00 0.0
91 55 0.00 0.0
97 58 0.00 0.0
95 60 0.00 0.0
91 63 0.00 0.0
96 64 0.00 0.0
98 69 0.00 0.0
92 60 0.00 0.0
95 63 0.00 0.0
94 61 0.00 0.0
95 65 0.00 0.0
99 70 0.00 0.0
103 72 0.00 0.0
105 74 0.00 0.0
104 78 0.00 0.0
July 2021 Boise Weather
Day High (°F) Low (°F) Precip. (inches) Snow (inches)
103 72 0.00 0.0
102 72 0.00 0.0
103 72 0.00 0.0
101 74 0.00 0.0
101 74 0.00 0.0
107 71 0.00 0.0
99 79 0.00 0.0
99 64 0.00 0.0
95 64 0.00 0.0
104 69 0.00 0.0
98 71 0.00 0.0
102 66 0.00 0.0
97 67 0.00 0.0
99 67 0.00 0.0
98 70 0.00 0.0
96 63 0.00 0.0
98 62 0.00 0.0
101 67 0.00 0.0
97 80 0.00 0.0
92 73 0.05 0.0
95 68 0.01 0.0
91 60 0.00 0.0
93 60 0.00 0.0
95 60 0.00 0.0
98 65 0.00 0.0
102 70 0.00 0.0
100 71 0.00 0.0
97 71 0.03 0.0
99 70 0.00 0.0
100 77 0.00 0.0
96 69 0.83 0.0
August 2021 Boise Weather
Day High (°F) Low (°F) Precip. (inches) Snow (inches)
82 69 0.14 0.0
93 68 0.00 0.0
96 69 0.00 0.0
105 67 0.00 0.0
97 71 0.00 0.0
82 67 0.00 0.0
94 61 0.00 0.0
87 65 0.00 0.0
83 53 0.00 0.0
93 58 0.00 0.0
98 62 0.00 0.0
100 67 0.00 0.0
98 66 0.00 0.0
97 67 0.00 0.0
98 66 0.00 0.0
97 68 0.00 0.0
82 60 0.00 0.0
77 53 0.00 0.0
80 52 0.00 0.0
85 56 0.00 0.0
77 57 0.05 0.0
84 52 0.00 0.0
82 56 0.00 0.0
82 50 0.00 0.0
86 56 0.00 0.0
84 59 0.00 0.0
80 54 0.00 0.0
83 51 0.00 0.0
91 57 0.00 0.0
89 60 0.00 0.0
81 54 0.00 0.0
September 2021 Boise Weather
Day High (°F) Low (°F) Precip. (inches) Snow (inches)
80 47 0.00 0.0
80 47 0.00 0.0
82 47 0.00 0.0
90 51 0.00 0.0
93 55 0.00 0.0
91 56 0.00 0.0
94 60 0.00 0.0
93 62 0.00 0.0
98 64 0.00 0.0
78 55 0.11 0.0
79 53 0.00 0.0
84 54 0.00 0.0
81 52 0.00 0.0
82 49 0.00 0.0
84 52 0.00 0.0
71 48 0.00 0.0
87 47 0.00 0.0
85 62 0.01 0.0
66 50 0.08 0.0
67 41 0.00 0.0
77 47 0.00 0.0
82 53 0.00 0.0
77 51 0.00 0.0
83 52 0.00 0.0
86 53 0.00 0.0
86 58 0.00 0.0
86 54 0.00 0.0
66 45 0.17 0.0
65 38 0.00 0.0
72 42 0.00 0.0
October 2021 Boise Weather
Day High (°F) Low (°F) Precip. (inches) Snow (inches)
72 44 0.00 0.0
78 48 0.00 0.0
83 47 0.00 0.0
87 49 0.00 0.0
83 55 0.00 0.0
71 51 0.00 0.0
70 47 0.04 0.0
61 50 0.46 0.0
62 44 0.01 0.0
64 43 0.04 0.0
56 39 0.00 0.0
55 35 0.00 0.0
47 34 0.00 0.0
55 32 0.00 0.0
65 40 0.00 0.0
73 38 0.00 0.0
75 42 0.00 0.0
63 47 0.00 0.0
66 39 0.00 0.0
68 54 0.00 0.0
76 52 0.00 0.0
70 44 0.39 0.0
54 42 0.02 0.0
55 47 0.50 0.0
52 41 0.43 0.0
53 40 0.06 0.0
61 46 0.00 0.0
69 50 0.00 0.0
71 50 0.00 0.0
59 41 0.00 0.0
56 40 0.00 0.0
November 2021 Boise Weather
Day High (°F) Low (°F) Precip. (inches) Snow (inches)
55 40 0.15 0.0
60 47 0.00 0.0
65 42 0.00 0.0
63 48 0.04 0.0
63 42 0.00 0.0
57 45 0.02 0.0
50 34 0.00 0.0
50 34 0.00 0.0
50 36 0.41 0.0
50 35 0.00 0.0
49 42 0.02 0.0
62 41 0.01 0.0
61 43 0.01 0.0
63 47 0.00 0.0
61 45 0.00 0.0
56 29 0.00 0.0
43 23 0.00 0.0
46 31 0.08 0.0
54 42 0.21 0.0
47 32 0.00 0.0
47 29 0.00 0.0
50 28 0.00 0.0
43 25 0.11 0.0
43 28 0.00 0.0
49 26 0.00 0.0
43 31 0.00 0.0
52 32 0.00 0.0
55 32 0.00 0.0
53 31 0.00 0.0
51 31 0.00 0.0
December 2021 Boise Weather
Day High (°F) Low (°F) Precip. (inches) Snow (inches)
55 33 0.00 0.0
53 32 0.00 0.0
53 32 0.00 0.0
52 29 0.00 0.0
49 31 0.00 0.0
38 30 0.23 0.0
44 33 0.01 0.0
50 31 0.00 0.0
37 30 0.01 0.4
38 20 0.03 0.4
42 34 0.00 0.0
50 37 0.06 0.0
53 41 0.00 0.0
50 26 0.30 2.1
33 19 0.01 0.1
35 30 0.03 0.9
38 26 0.00 0.0
35 25 0.00 0.0
38 27 0.01 0.0
50 30 0.00 0.0
42 25 0.00 0.0
46 30 0.04 0.0
46 33 0.22 0.4
37 26 0.19 2.3
37 27 0.03 0.6
36 26 0.14 2.1
31 21 0.02 0.8
24 15 0.00 0.0
27 12 0.12 2.8
30 15 0.09 2.1
30 9 0.00 0.0
Weather Station Details
Years Station Coordinates
1940–2022 location