This region experiences warm (but not hot) and dry summers, with no average monthly temperatures above 71.6 °F. According to the Köppen Climate Classification system, Callahan has a warm-summer Mediterranean climate, abbreviated "Csb" on climate maps.[5]
| Climate data for Callahan (1991–2020 normals, extremes 1953–2018) |
| Month |
Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec |
Year |
| Record high °F (°C) |
65
(18) |
72
(22) |
82
(28) |
86
(30) |
98
(37) |
103
(39) |
106
(41) |
105
(41) |
105
(41) |
91
(33) |
75
(24) |
65
(18) |
106
(41) |
| Mean daily maximum °F (°C) |
47.6
(8.7) |
52.7
(11.5) |
58.7
(14.8) |
64.5
(18.1) |
73.0
(22.8) |
81.1
(27.3) |
90.0
(32.2) |
89.0
(31.7) |
82.6
(28.1) |
69.5
(20.8) |
54.1
(12.3) |
46.0
(7.8) |
67.4
(19.7) |
| Daily mean °F (°C) |
37.7
(3.2) |
41.2
(5.1) |
45.4
(7.4) |
49.8
(9.9) |
56.6
(13.7) |
63.0
(17.2) |
70.4
(21.3) |
69.0
(20.6) |
63.0
(17.2) |
53.0
(11.7) |
42.7
(5.9) |
36.8
(2.7) |
52.4
(11.3) |
| Mean daily minimum °F (°C) |
27.7
(−2.4) |
29.7
(−1.3) |
32.1
(0.1) |
35.1
(1.7) |
40.3
(4.6) |
44.9
(7.2) |
50.7
(10.4) |
49.0
(9.4) |
43.3
(6.3) |
36.4
(2.4) |
31.4
(−0.3) |
27.6
(−2.4) |
37.4
(3.0) |
| Record low °F (°C) |
−6
(−21) |
−1
(−18) |
4
(−16) |
18
(−8) |
21
(−6) |
21
(−6) |
29
(−2) |
32
(0) |
23
(−5) |
15
(−9) |
9
(−13) |
−9
(−23) |
−9
(−23) |
| Average precipitation inches (mm) |
3.48
(88) |
2.80
(71) |
2.38
(60) |
1.37
(35) |
1.55
(39) |
0.69
(18) |
0.47
(12) |
0.29
(7.4) |
0.38
(9.7) |
1.34
(34) |
2.27
(58) |
3.75
(95) |
20.77
(528) |
| Average snowfall inches (cm) |
0.4
(1.0) |
0.0
(0.0) |
1.1
(2.8) |
0.3
(0.76) |
0.0
(0.0) |
0.0
(0.0) |
0.0
(0.0) |
0.0
(0.0) |
0.0
(0.0) |
0.0
(0.0) |
1.1
(2.8) |
1.5
(3.8) |
4.4
(11) |
| Average precipitation days (≥ 0.01 in) |
13.1 |
11.3 |
12.7 |
10.0 |
8.4 |
4.3 |
2.5 |
1.7 |
2.2 |
5.6 |
10.8 |
13.4 |
96.0 |
| Average snowy days (≥ 0.1 in) |
0.1 |
0.0 |
0.4 |
0.1 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.0 |
0.3 |
0.2 |
1.1 |
| Source 1: NOAA[6] |
| Source 2: WRCC (extremes)[7] |
