Template:SLC weatherbox
| Climate data for Salt Lake City International Airport (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) | 63 (17) |
69 (21) |
80 (27) |
89 (32) |
99 (37) |
107 (42) |
107 (42) |
106 (41) |
107 (42) |
92 (33) |
75 (24) |
69 (21) |
107 (42) |
| Mean maximum °F (°C) | 51.8 (11.0) |
58.8 (14.9) |
70.4 (21.3) |
80.2 (26.8) |
88.9 (31.6) |
97.9 (36.6) |
101.9 (38.8) |
99.6 (37.6) |
93.9 (34.4) |
82.0 (27.8) |
67.1 (19.5) |
54.3 (12.4) |
102.3 (39.1) |
| Mean daily maximum °F (°C) | 38.6 (3.7) |
44.7 (7.1) |
55.3 (12.9) |
61.9 (16.6) |
72.6 (22.6) |
84.1 (28.9) |
94.0 (34.4) |
91.7 (33.2) |
80.6 (27.0) |
65.5 (18.6) |
50.7 (10.4) |
39.0 (3.9) |
64.9 (18.3) |
| Daily mean °F (°C) | 31.4 (−0.3) |
36.6 (2.6) |
45.8 (7.7) |
51.8 (11.0) |
61.5 (16.4) |
71.6 (22.0) |
81.1 (27.3) |
79.1 (26.2) |
68.4 (20.2) |
54.6 (12.6) |
41.7 (5.4) |
32.2 (0.1) |
54.7 (12.6) |
| Mean daily minimum °F (°C) | 24.2 (−4.3) |
28.6 (−1.9) |
36.3 (2.4) |
41.8 (5.4) |
50.4 (10.2) |
59.1 (15.1) |
68.2 (20.1) |
66.6 (19.2) |
56.3 (13.5) |
43.6 (6.4) |
32.8 (0.4) |
25.3 (−3.7) |
44.4 (6.9) |
| Mean minimum °F (°C) | 6.5 (−14.2) |
9.2 (−12.7) |
21.0 (−6.1) |
28.7 (−1.8) |
34.8 (1.6) |
43.5 (6.4) |
54.9 (12.7) |
52.4 (11.3) |
39.7 (4.3) |
29.5 (−1.4) |
16.9 (−8.4) |
7.3 (−13.7) |
0.9 (−17.3) |
| Record low °F (°C) | −22 (−30) |
−30 (−34) |
0 (−18) |
14 (−10) |
25 (−4) |
32 (0) |
40 (4) |
37 (3) |
27 (−3) |
14 (−10) |
−14 (−26) |
−21 (−29) |
−30 (−34) |
| Average precipitation inches (mm) | 1.43 (36) |
1.30 (33) |
1.75 (44) |
2.16 (55) |
1.82 (46) |
0.95 (24) |
0.49 (12) |
0.58 (15) |
1.06 (27) |
1.26 (32) |
1.32 (34) |
1.40 (36) |
15.52 (394) |
| Average snowfall inches (cm) | 12.7 (32) |
10.7 (27) |
5.9 (15) |
2.9 (7.4) |
0.1 (0.25) |
0.0 (0.0) |
0.0 (0.0) |
0.0 (0.0) |
0.0 (0.0) |
0.5 (1.3) |
7.0 (18) |
12.1 (31) |
51.9 (132) |
| Average precipitation days (≥ 0.01 in) | 10.3 | 9.5 | 9.2 | 10.4 | 8.9 | 4.8 | 3.9 | 4.9 | 5.2 | 6.5 | 8.3 | 9.6 | 91.5 |
| Average snowy days (≥ 0.1 in) | 7.6 | 6.0 | 4.0 | 2.2 | 0.2 | 0.0 | 0.0 | 0.0 | 0.0 | 0.7 | 3.6 | 7.1 | 31.4 |
| Average relative humidity (%) | 74.0 | 69.8 | 60.2 | 53.2 | 48.7 | 41.4 | 35.9 | 38.5 | 45.6 | 55.7 | 66.3 | 74.3 | 55.3 |
| Average dew point °F (°C) | 19.9 (−6.7) |
24.1 (−4.4) |
27.1 (−2.7) |
31.1 (−0.5) |
36.9 (2.7) |
41.4 (5.2) |
45.7 (7.6) |
45.1 (7.3) |
39.9 (4.4) |
34.5 (1.4) |
28.4 (−2.0) |
21.7 (−5.7) |
33.0 (0.5) |
| Mean monthly sunshine hours | 127.4 | 163.1 | 241.9 | 269.1 | 321.7 | 360.5 | 380.5 | 352.5 | 301.1 | 248.1 | 150.4 | 113.1 | 3,029.4 |
| Percent possible sunshine | 43 | 55 | 65 | 67 | 72 | 80 | 83 | 83 | 81 | 72 | 50 | 39 | 68 |
| Average ultraviolet index | 1.7 | 2.7 | 4.6 | 6.6 | 8.4 | 9.8 | 10.4 | 9.0 | 6.6 | 4.0 | 2.2 | 1.4 | 5.6 |
| Source 1: NOAA (relative humidity and sun 1961–1990)[1][2][3][4][5] | |||||||||||||
| Source 2: UV Index Today (1995 to 2022)[6] | |||||||||||||
- ^ Mean monthly maxima and minima (i.e. the expected highest and lowest temperature readings at any point during the year or given month) calculated based on data at said location from 1991 to 2020.
- ^ The official Salt Lake City climatology station was located in downtown from March 1874 to April 30, 1928 and at Salt Lake City Int'l since May 1, 1928. For further information, see ThreadEx.
- ^ "Summary of Monthly Normals 1991-2020, Station Name: UT SALT LAKE CITY INTL ARPT". National Oceanic and Atmospheric Administration. Archived from the original on 2023-08-18. Retrieved 2019-11-01.
- ^ "xmACIS". National Oceanic and Atmospheric Administration. Retrieved 2021-06-16.
- ^ "Highest and Lowest Daily Maximum Temperature for Each Month with Day and Year of Occurrence, Plus Normal Monthly Maximum Temperature". National Oceanic and Atmospheric Administration. Archived from the original on 2007-06-26. Retrieved 2010-05-11.
- ^ "Highest and Lowest Daily Minumum [sic] Temperature for Each Month with Day and Year of Occurrence, Plus Normal Monthly Minimum Temperature". National Oceanic and Atmospheric Administration. Archived from the original on 2004-12-17. Retrieved 2010-05-11.
- ^ "WMO Climate Normals for SALT LAKE CITY/INTL, UT 1961–1990". National Oceanic and Atmospheric Administration. Archived from the original on 2023-08-18. Retrieved 2020-07-19.
- ^ "Historical UV Index Data - Salt Lake City, UT". UV Index Today. Retrieved April 23, 2023.