| 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 °F (°C) | 67 (19) |
73 (23) |
86 (30) |
89 (32) |
95 (35) |
104 (40) |
105 (41) |
104 (40) |
100 (38) |
92 (33) |
81 (27) |
69 (21) |
105 (41) |
| Mean maximum °F (°C) | 53.0 (11.7) |
55.3 (12.9) |
69.3 (20.7) |
79.6 (26.4) |
87.2 (30.7) |
92.6 (33.7) |
93.8 (34.3) |
92.1 (33.4) |
89.3 (31.8) |
80.6 (27.0) |
66.7 (19.3) |
56.1 (13.4) |
95.4 (35.2) |
| Mean daily maximum °F (°C) | 32.3 (0.2) |
35.2 (1.8) |
45.9 (7.7) |
58.7 (14.8) |
70.3 (21.3) |
79.7 (26.5) |
83.7 (28.7) |
81.4 (27.4) |
74.4 (23.6) |
62.0 (16.7) |
48.6 (9.2) |
37.2 (2.9) |
59.1 (15.1) |
| Daily mean °F (°C) | 25.8 (−3.4) |
28.0 (−2.2) |
37.2 (2.9) |
48.9 (9.4) |
60.3 (15.7) |
69.9 (21.1) |
74.1 (23.4) |
72.3 (22.4) |
64.9 (18.3) |
53.0 (11.7) |
41.2 (5.1) |
31.3 (−0.4) |
50.6 (10.3) |
| Mean daily minimum °F (°C) | 19.2 (−7.1) |
20.8 (−6.2) |
28.6 (−1.9) |
39.1 (3.9) |
50.2 (10.1) |
60.2 (15.7) |
64.4 (18.0) |
63.2 (17.3) |
55.5 (13.1) |
44.0 (6.7) |
33.9 (1.1) |
25.3 (−3.7) |
42.0 (5.6) |
| Mean minimum °F (°C) | 0.1 (−17.7) |
3.5 (−15.8) |
12.0 (−11.1) |
25.5 (−3.6) |
36.3 (2.4) |
47.3 (8.5) |
54.1 (12.3) |
53.4 (11.9) |
41.6 (5.3) |
31.0 (−0.6) |
19.8 (−6.8) |
8.8 (−12.9) |
−3.7 (−19.8) |
| Record low °F (°C) | −21 (−29) |
−20 (−29) |
−4 (−20) |
8 (−13) |
25 (−4) |
36 (2) |
42 (6) |
38 (3) |
29 (−2) |
17 (−8) |
0 (−18) |
−11 (−24) |
−21 (−29) |
| Average precipitation inches (mm) | 2.23 (57) |
2.08 (53) |
2.43 (62) |
3.26 (83) |
3.72 (94) |
3.26 (83) |
3.51 (89) |
3.26 (83) |
3.22 (82) |
2.53 (64) |
2.57 (65) |
2.25 (57) |
34.32 (872) |
| Average snowfall inches (cm) | 14.0 (36) |
12.5 (32) |
6.2 (16) |
1.5 (3.8) |
0.0 (0.0) |
0.0 (0.0) |
0.0 (0.0) |
0.0 (0.0) |
0.0 (0.0) |
0.0 (0.0) |
1.9 (4.8) |
8.9 (23) |
45.0 (114) |
| Average extreme snow depth inches (cm) | 7.1 (18) |
6.6 (17) |
4.4 (11) |
0.8 (2.0) |
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) |
4.3 (11) |
10.0 (25) |
| 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 °F (°C) | 16.2 (−8.8) |
17.6 (−8.0) |
25.9 (−3.4) |
35.1 (1.7) |
45.7 (7.6) |
55.6 (13.1) |
60.4 (15.8) |
59.7 (15.4) |
53.2 (11.8) |
41.4 (5.2) |
32.4 (0.2) |
21.9 (−5.6) |
38.7 (3.7) |
| 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] | |||||||||||||
Notes
edit- ^ Mean monthly maxima and minima (i.e. the highest and lowest temperature readings during an entire month or year) calculated based on data at said location from 1991 to 2020.
- ^ Official records for Detroit were kept at downtown from January 1874 to December 1933, Detroit City Airport from February 1934 to March 1966, and at DTW since April 1966. For more information, see ThreadEx.
References
edit- ^ "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.