Climate data for Monterrey (1951–2010)
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Record high °C (°F) 38
(100)
40
(104)
43
(109)
48
(118)
46
(115)
45
(113)
42.5
(108.5)
42.5
(108.5)
41
(106)
39
(102)
39
(102)
39
(102)
48
(118)
Average high °C (°F) 20.7
(69.3)
23.2
(73.8)
26.9
(80.4)
30
(86)
32.2
(90)
33.8
(92.8)
34.8
(94.6)
34.5
(94.1)
31.5
(88.7)
27.6
(81.7)
24.1
(75.4)
21.2
(70.2)
28.4
(83.1)
Daily mean °C (°F) 14.4
(57.9)
16.6
(61.9)
20
(68)
23.4
(74.1)
26.2
(79.2)
27.9
(82.2)
28.6
(83.5)
28.5
(83.3)
26.2
(79.2)
22.4
(72.3)
18.4
(65.1)
15.1
(59.2)
22.3
(72.1)
Average low °C (°F) 8.2
(46.8)
10
(50)
13.2
(55.8)
16.7
(62.1)
20.2
(68.4)
22
(72)
22.3
(72.1)
22.5
(72.5)
20.9
(69.6)
17.2
(63)
12.7
(54.9)
9.1
(48.4)
16.3
(61.3)
Record low °C (°F) −7
(19)
−7
(19)
−1
(30)
5
(41)
8
(46)
11.5
(52.7)
11
(52)
12.2
(54)
2
(36)
2
(36)
−5
(23)
−7.5
(18.5)
−7.5
(18.5)
Precipitation mm (inches) 16.6
(0.654)
16.5
(0.65)
19.9
(0.783)
29.7
(1.169)
52.3
(2.059)
68.4
(2.693)
43
(1.69)
79.6
(3.134)
150.6
(5.929)
77.2
(3.039)
23
(0.91)
14.1
(0.555)
590.9
(23.264)
Avg. precipitation days (≥ 0.1 mm) 4.2 3.8 3.4 4.5 5.7 5.6 3.9 6.4 8.2 6.5 4.1 3.4 59.7
Avg. snowy days 0.03 0 0 0 0 0 0 0 0 0 0 0 0.03
 % humidity 67 64 58 61 66 66 63 63 69 71 68 69 65
Mean monthly sunshine hours 193 137 155 167 163 178 194 226 167 142 196 185 2,104
Source #1: Servicio Meteorológico Nacional (extremes 1929–2010, humidity and sun 1981–2000)[34][35][36][37]
Source #2: Colegio de Postgraduados (snowy days 1951–1980)[38]