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edit| Climate data for Detroit (DTW), 1991–2020 normals,[a] extremes 1874–present[b] | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Record high °C (°F) | 19.6 (67.2) |
23.2 (73.8) |
30.4 (86.7) |
34.6 (94.3) |
38.4 (101.2) |
41.8 (107.2) |
44.8 (112.6) |
43.4 (110.1) |
40.3 (104.5) |
36.0 (96.8) |
29.3 (84.8) |
23.9 (75.1) |
44.8 (112.6) |
| Mean maximum °C (°F) | 11.7 (53.0) |
14.1 (57.3) |
20.7 (69.3) |
26.4 (79.6) |
30.7 (87.2) |
35.9 (96.7) |
41.7 (107.1) |
39.9 (103.8) |
33.2 (91.7) |
27.0 (80.6) |
19.3 (66.7) |
13.4 (56.1) |
42.5 (108.5) |
| Mean daily maximum °C (°F) | 0.2 (32.3) |
2.9 (37.2) |
9.4 (48.9) |
18.2 (64.7) |
24.6 (76.3) |
33.2 (91.7) |
38.7 (101.7) |
37.5 (99.5) |
31.3 (88.4) |
21.7 (71.0) |
14.8 (58.6) |
4.6 (40.2) |
19.8 (67.5) |
| Daily mean °C (°F) | −3.4 (25.8) |
−0.6 (31.0) |
5.7 (42.2) |
11.6 (52.9) |
20.7 (69.3) |
27.7 (81.9) |
31.2 (88.1) |
30.4 (86.7) |
23.3 (73.9) |
14.4 (58.0) |
5.1 (41.2) |
−0.4 (31.3) |
13.8 (56.9) |
| Mean daily minimum °C (°F) | −7.1 (19.2) |
−4.0 (24.8) |
0.3 (32.6) |
6.2 (43.1) |
12.9 (55.2) |
20.1 (68.2) |
27.3 (81.1) |
26.2 (79.2) |
16.4 (61.5) |
8.9 (48.0) |
3.3 (37.9) |
−3.2 (26.3) |
8.9 (48.1) |
| Mean minimum °C (°F) | −17.7 (0.1) |
−15.2 (4.7) |
−9.4 (15.0) |
−1.2 (29.8) |
5.2 (41.3) |
12.4 (54.3) |
20.6 (69.1) |
11.9 (53.4) |
8.1 (46.6) |
3.3 (38.0) |
−6.8 (19.8) |
−12.9 (8.8) |
−19.8 (−3.7) |
| Record low °C (°F) | −29.7 (−21.4) |
−29.2 (−20.6) |
−20.3 (−4.5) |
−12.1 (10.2) |
−2.2 (28.1) |
5.8 (42.4) |
10.7 (51.3) |
8.9 (48.1) |
2.3 (36.2) |
−2.6 (27.4) |
−14.7 (5.6) |
−24.1 (−11.4) |
−29.7 (−21.4) |
| Average precipitation mm (inches) | 57 (2.23) |
53 (2.08) |
62 (2.43) |
83 (3.26) |
94 (3.72) |
83 (3.26) |
89 (3.51) |
83 (3.26) |
82 (3.22) |
64 (2.53) |
65 (2.57) |
57 (2.25) |
872 (34.32) |
| Average snowfall cm (inches) | 36 (14.0) |
32 (12.5) |
16 (6.2) |
3.8 (1.5) |
0.0 (0.0) |
0.0 (0.0) |
0.0 (0.0) |
0.0 (0.0) |
0.0 (0.0) |
0.0 (0.0) |
4.8 (1.9) |
23 (8.9) |
114 (45.0) |
| Average precipitation days (≥ 0.01 in) | 13.4 | 11.0 | 11.1 | 12.5 | 12.9 | 10.7 | 10.5 | 9.7 | 9.5 | 10.6 | 11.0 | 13.1 | 136.0 |
| Average snowy days (≥ 0.1 in) | 10.7 | 9.2 | 5.3 | 1.5 | 0.1 | 0.0 | 0.0 | 0.0 | 0.0 | 0.2 | 2.6 | 8.0 | 37.6 |
| Average relative humidity (%) | 74.7 | 72.5 | 70.0 | 66.0 | 65.3 | 67.3 | 68.5 | 71.5 | 73.4 | 71.6 | 74.6 | 76.7 | 71.0 |
| Average dew point °C (°F) | −8.8 (16.2) |
−8.0 (17.6) |
−3.4 (25.9) |
1.7 (35.1) |
7.6 (45.7) |
13.1 (55.6) |
15.8 (60.4) |
15.4 (59.7) |
11.8 (53.2) |
5.2 (41.4) |
0.2 (32.4) |
−5.6 (21.9) |
3.7 (38.7) |
| Mean monthly sunshine hours | 119.9 | 138.3 | 184.9 | 217.0 | 275.9 | 301.8 | 317.0 | 283.5 | 227.6 | 176.0 | 106.3 | 87.7 | 2,435.9 |
| Percent possible sunshine | 41 | 47 | 50 | 54 | 61 | 66 | 69 | 66 | 61 | 51 | 36 | 31 | 55 |
| Average ultraviolet index | 1.2 | 2.0 | 3.6 | 5.4 | 6.9 | 8.0 | 8.2 | 7.1 | 5.3 | 3.1 | 1.6 | 1.1 | 4.4 |
| Source 1: NOAA (relative humidity, dew point, and sun 1961–1990)[1][2][3] | |||||||||||||
| Source 2: UV Index Today (1995 to 2022)[4] | |||||||||||||
Cite error: There are <ref group=lower-alpha> tags or {{efn}} templates on this page, but the references will not show without a {{reflist|group=lower-alpha}} template or {{notelist}} template (see the help page).
- ^ "NOWData – NOAA Online Weather Data/". National Oceanic and Atmospheric Administration. Retrieved May 4, 2021.
- ^ "Summary of Monthly Normals 1991–2020". National Oceanic and Atmospheric Administration. Archived from the original on May 4, 2021. Retrieved May 4, 2021.
- ^ "Detroit/Metropolitan ARPT MI Climate Normals 1961–1990". National Oceanic and Atmospheric Administration. Retrieved July 18, 2020.
- ^ "Historical UV Index Data - Detroit, MI". UV Index Today. Retrieved April 21, 2023.