Climate data for Duluth Int'l, Minnesota (1991–2020 normals, [a] extremes 1871–present [b]) | |||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
Record high °F (°C) | 55 (13) |
58 (14) |
81 (27) |
88 (31) |
95 (35) |
97 (36) |
106 (41) |
97 (36) |
97 (36) |
86 (30) |
75 (24) |
56 (13) |
106 (41) |
Mean maximum °F (°C) | 38.6 (3.7) |
43.0 (6.1) |
55.9 (13.3) |
70.7 (21.5) |
81.7 (27.6) |
86.0 (30.0) |
88.6 (31.4) |
86.7 (30.4) |
81.9 (27.7) |
74.0 (23.3) |
55.4 (13.0) |
40.3 (4.6) |
90.2 (32.3) |
Mean daily maximum °F (°C) | 19.9 (−6.7) |
24.8 (−4.0) |
36.2 (2.3) |
49.2 (9.6) |
63.0 (17.2) |
72.1 (22.3) |
77.7 (25.4) |
75.8 (24.3) |
67.2 (19.6) |
52.7 (11.5) |
37.1 (2.8) |
24.7 (−4.1) |
50.0 (10.0) |
Daily mean °F (°C) | 11.2 (−11.6) |
15.4 (−9.2) |
27.0 (−2.8) |
39.5 (4.2) |
52.0 (11.1) |
61.2 (16.2) |
67.0 (19.4) |
65.5 (18.6) |
57.2 (14.0) |
44.1 (6.7) |
29.8 (−1.2) |
17.1 (−8.3) |
40.6 (4.8) |
Mean daily minimum °F (°C) | 2.4 (−16.4) |
6.0 (−14.4) |
17.8 (−7.9) |
29.9 (−1.2) |
41.0 (5.0) |
50.2 (10.1) |
56.2 (13.4) |
55.2 (12.9) |
47.3 (8.5) |
35.6 (2.0) |
22.5 (−5.3) |
9.6 (−12.4) |
31.1 (−0.5) |
Mean minimum °F (°C) | −21.9 (−29.9) |
−17.3 (−27.4) |
−7.4 (−21.9) |
14.7 (−9.6) |
28.7 (−1.8) |
38.1 (3.4) |
45.7 (7.6) |
44.6 (7.0) |
32.5 (0.3) |
21.9 (−5.6) |
2.7 (−16.3) |
−14.3 (−25.7) |
−23.9 (−31.1) |
Record low °F (°C) | −41 (−41) |
−39 (−39) |
−29 (−34) |
−5 (−21) |
16 (−9) |
27 (−3) |
35 (2) |
32 (0) |
23 (−5) |
6 (−14) |
−29 (−34) |
−35 (−37) |
−41 (−41) |
Average precipitation inches (mm) | 0.95 (24) |
1.01 (26) |
1.46 (37) |
2.53 (64) |
3.37 (86) |
4.39 (112) |
3.92 (100) |
3.73 (95) |
3.48 (88) |
2.91 (74) |
1.96 (50) |
1.47 (37) |
31.18 (792) |
Average snowfall inches (cm) | 16.8 (43) |
15.1 (38) |
12.8 (33) |
9.1 (23) |
0.8 (2.0) |
0.0 (0.0) |
0.0 (0.0) |
0.0 (0.0) |
0.1 (0.25) |
2.7 (6.9) |
14.1 (36) |
18.7 (47) |
90.2 (229) |
Average extreme snow depth inches (cm) | 18.6 (47) |
20.3 (52) |
19.4 (49) |
8.2 (21) |
0.4 (1.0) |
0.0 (0.0) |
0.0 (0.0) |
0.0 (0.0) |
0.0 (0.0) |
1.2 (3.0) |
6.6 (17) |
12.7 (32) |
24.8 (63) |
Average precipitation days (≥ 0.01 in) | 10.4 | 8.9 | 9.6 | 11.3 | 12.7 | 12.4 | 11.9 | 10.8 | 11.6 | 11.9 | 11.0 | 10.7 | 133.2 |
Average snowy days (≥ 0.1 in) | 13.1 | 10.9 | 8.0 | 5.7 | 0.6 | 0.0 | 0.0 | 0.0 | 0.1 | 2.1 | 9.0 | 12.9 | 62.4 |
Average relative humidity (%) | 72.0 | 69.8 | 69.3 | 63.6 | 62.7 | 69.5 | 70.9 | 74.5 | 75.7 | 71.4 | 74.9 | 76.3 | 70.9 |
Average dew point °F (°C) | 0.3 (−17.6) |
4.5 (−15.3) |
15.4 (−9.2) |
25.5 (−3.6) |
36.5 (2.5) |
48.2 (9.0) |
55.0 (12.8) |
54.0 (12.2) |
45.7 (7.6) |
34.0 (1.1) |
21.2 (−6.0) |
7.2 (−13.8) |
29.0 (−1.7) |
Mean monthly sunshine hours | 132.7 | 149.7 | 190.7 | 229.5 | 263.5 | 272.8 | 307.5 | 261.8 | 194.0 | 150.4 | 98.5 | 102.3 | 2,353.4 |
Percent possible sunshine | 47 | 52 | 52 | 56 | 57 | 58 | 64 | 60 | 51 | 44 | 35 | 38 | 53 |
Source: NOAA (relative humidity, dew point, and sun 1961–1990) [1] [2] [3] |
Climate data for Duluth Int'l, Minnesota (1991–2020 normals, [a] extremes 1871–present [b]) | |||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
Record high °F (°C) | 55 (13) |
58 (14) |
81 (27) |
88 (31) |
95 (35) |
97 (36) |
106 (41) |
97 (36) |
97 (36) |
86 (30) |
75 (24) |
56 (13) |
106 (41) |
Mean maximum °F (°C) | 38.6 (3.7) |
43.0 (6.1) |
55.9 (13.3) |
70.7 (21.5) |
81.7 (27.6) |
86.0 (30.0) |
88.6 (31.4) |
86.7 (30.4) |
81.9 (27.7) |
74.0 (23.3) |
55.4 (13.0) |
40.3 (4.6) |
90.2 (32.3) |
Mean daily maximum °F (°C) | 19.9 (−6.7) |
24.8 (−4.0) |
36.2 (2.3) |
49.2 (9.6) |
63.0 (17.2) |
72.1 (22.3) |
77.7 (25.4) |
75.8 (24.3) |
67.2 (19.6) |
52.7 (11.5) |
37.1 (2.8) |
24.7 (−4.1) |
50.0 (10.0) |
Daily mean °F (°C) | 11.2 (−11.6) |
15.4 (−9.2) |
27.0 (−2.8) |
39.5 (4.2) |
52.0 (11.1) |
61.2 (16.2) |
67.0 (19.4) |
65.5 (18.6) |
57.2 (14.0) |
44.1 (6.7) |
29.8 (−1.2) |
17.1 (−8.3) |
40.6 (4.8) |
Mean daily minimum °F (°C) | 2.4 (−16.4) |
6.0 (−14.4) |
17.8 (−7.9) |
29.9 (−1.2) |
41.0 (5.0) |
50.2 (10.1) |
56.2 (13.4) |
55.2 (12.9) |
47.3 (8.5) |
35.6 (2.0) |
22.5 (−5.3) |
9.6 (−12.4) |
31.1 (−0.5) |
Mean minimum °F (°C) | −21.9 (−29.9) |
−17.3 (−27.4) |
−7.4 (−21.9) |
14.7 (−9.6) |
28.7 (−1.8) |
38.1 (3.4) |
45.7 (7.6) |
44.6 (7.0) |
32.5 (0.3) |
21.9 (−5.6) |
2.7 (−16.3) |
−14.3 (−25.7) |
−23.9 (−31.1) |
Record low °F (°C) | −41 (−41) |
−39 (−39) |
−29 (−34) |
−5 (−21) |
16 (−9) |
27 (−3) |
35 (2) |
32 (0) |
23 (−5) |
6 (−14) |
−29 (−34) |
−35 (−37) |
−41 (−41) |
Average precipitation inches (mm) | 0.95 (24) |
1.01 (26) |
1.46 (37) |
2.53 (64) |
3.37 (86) |
4.39 (112) |
3.92 (100) |
3.73 (95) |
3.48 (88) |
2.91 (74) |
1.96 (50) |
1.47 (37) |
31.18 (792) |
Average snowfall inches (cm) | 16.8 (43) |
15.1 (38) |
12.8 (33) |
9.1 (23) |
0.8 (2.0) |
0.0 (0.0) |
0.0 (0.0) |
0.0 (0.0) |
0.1 (0.25) |
2.7 (6.9) |
14.1 (36) |
18.7 (47) |
90.2 (229) |
Average extreme snow depth inches (cm) | 18.6 (47) |
20.3 (52) |
19.4 (49) |
8.2 (21) |
0.4 (1.0) |
0.0 (0.0) |
0.0 (0.0) |
0.0 (0.0) |
0.0 (0.0) |
1.2 (3.0) |
6.6 (17) |
12.7 (32) |
24.8 (63) |
Average precipitation days (≥ 0.01 in) | 10.4 | 8.9 | 9.6 | 11.3 | 12.7 | 12.4 | 11.9 | 10.8 | 11.6 | 11.9 | 11.0 | 10.7 | 133.2 |
Average snowy days (≥ 0.1 in) | 13.1 | 10.9 | 8.0 | 5.7 | 0.6 | 0.0 | 0.0 | 0.0 | 0.1 | 2.1 | 9.0 | 12.9 | 62.4 |
Average relative humidity (%) | 72.0 | 69.8 | 69.3 | 63.6 | 62.7 | 69.5 | 70.9 | 74.5 | 75.7 | 71.4 | 74.9 | 76.3 | 70.9 |
Average dew point °F (°C) | 0.3 (−17.6) |
4.5 (−15.3) |
15.4 (−9.2) |
25.5 (−3.6) |
36.5 (2.5) |
48.2 (9.0) |
55.0 (12.8) |
54.0 (12.2) |
45.7 (7.6) |
34.0 (1.1) |
21.2 (−6.0) |
7.2 (−13.8) |
29.0 (−1.7) |
Mean monthly sunshine hours | 132.7 | 149.7 | 190.7 | 229.5 | 263.5 | 272.8 | 307.5 | 261.8 | 194.0 | 150.4 | 98.5 | 102.3 | 2,353.4 |
Percent possible sunshine | 47 | 52 | 52 | 56 | 57 | 58 | 64 | 60 | 51 | 44 | 35 | 38 | 53 |
Source: NOAA (relative humidity, dew point, and sun 1961–1990) [1] [2] [3] |