Template:Flagstaff, Arizona weatherbox
| Climate data for Flagstaff Pulliam Airport, Arizona (1991–2020 normals, sun 1981–2010, humidity 1961–1990,[a] extremes 1898–present)[b] | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Record high °F (°C) | 66 (19) |
71 (22) |
73 (23) |
80 (27) |
89 (32) |
96 (36) |
97 (36) |
93 (34) |
91 (33) |
85 (29) |
74 (23) |
68 (20) |
97 (36) |
| Mean maximum °F (°C) | 56.9 (13.8) |
58.9 (14.9) |
65.7 (18.7) |
72.8 (22.7) |
80.5 (26.9) |
88.6 (31.4) |
90.5 (32.5) |
87.4 (30.8) |
82.9 (28.3) |
75.5 (24.2) |
66.9 (19.4) |
58.7 (14.8) |
91.4 (33.0) |
| Mean daily maximum °F (°C) | 43.4 (6.3) |
45.7 (7.6) |
52.2 (11.2) |
59.2 (15.1) |
68.1 (20.1) |
79.1 (26.2) |
82.0 (27.8) |
79.3 (26.3) |
74.1 (23.4) |
63.6 (17.6) |
52.1 (11.2) |
43.0 (6.1) |
61.8 (16.6) |
| Daily mean °F (°C) | 30.5 (−0.8) |
32.8 (0.4) |
38.0 (3.3) |
43.7 (6.5) |
51.3 (10.7) |
60.8 (16.0) |
66.7 (19.3) |
64.9 (18.3) |
58.3 (14.6) |
47.6 (8.7) |
37.5 (3.1) |
30.0 (−1.1) |
46.8 (8.2) |
| Mean daily minimum °F (°C) | 17.6 (−8.0) |
19.6 (−6.9) |
23.8 (−4.6) |
28.2 (−2.1) |
34.6 (1.4) |
42.5 (5.8) |
51.4 (10.8) |
50.6 (10.3) |
42.5 (5.8) |
31.5 (−0.3) |
23.0 (−5.0) |
16.9 (−8.4) |
31.8 (−0.1) |
| Mean minimum °F (°C) | −1.4 (−18.6) |
2.5 (−16.4) |
8.1 (−13.3) |
17.1 (−8.3) |
24.6 (−4.1) |
31.1 (−0.5) |
41.4 (5.2) |
42.3 (5.7) |
30.9 (−0.6) |
20.0 (−6.7) |
8.1 (−13.3) |
−1.4 (−18.6) |
−5.5 (−20.8) |
| Record low °F (°C) | −30 (−34) |
−23 (−31) |
−16 (−27) |
−2 (−19) |
7 (−14) |
22 (−6) |
32 (0) |
24 (−4) |
20 (−7) |
−2 (−19) |
−13 (−25) |
−23 (−31) |
−30 (−34) |
| Average precipitation inches (mm) | 2.05 (52) |
2.17 (55) |
1.88 (48) |
0.89 (23) |
0.77 (20) |
0.30 (7.6) |
2.61 (66) |
3.04 (77) |
1.84 (47) |
1.52 (39) |
1.55 (39) |
1.90 (48) |
20.52 (521) |
| Average snowfall inches (cm) | 20.9 (53) |
19.3 (49) |
15.6 (40) |
5.0 (13) |
1.1 (2.8) |
0.0 (0.0) |
0.0 (0.0) |
0.0 (0.0) |
0.0 (0.0) |
1.5 (3.8) |
8.2 (21) |
18.5 (47) |
90.1 (229) |
| Average extreme snow depth inches (cm) | 10.7 (27) |
9.8 (25) |
9.3 (24) |
3.3 (8.4) |
0.3 (0.76) |
0.0 (0.0) |
0.0 (0.0) |
0.0 (0.0) |
0.0 (0.0) |
0.6 (1.5) |
3.7 (9.4) |
8.8 (22) |
17.4 (44) |
| Average precipitation days (≥ 0.01 in) | 7.0 | 7.6 | 6.8 | 4.9 | 4.5 | 2.2 | 12.0 | 13.3 | 7.5 | 5.3 | 4.4 | 6.7 | 82.2 |
| Average snowy days (≥ 0.1 in) | 6.2 | 6.1 | 4.7 | 1.9 | 0.9 | 0.0 | 0.0 | 0.0 | 0.0 | 0.5 | 2.3 | 5.7 | 28.3 |
| Average relative humidity (%) | 61.9 | 59.5 | 54.9 | 46.5 | 39.4 | 33.6 | 51.1 | 58.1 | 54.7 | 52.6 | 56.9 | 60.6 | 52.5 |
| Average dew point °F (°C) | 15.3 (−9.3) |
16.7 (−8.5) |
18.7 (−7.4) |
20.5 (−6.4) |
24.3 (−4.3) |
28.4 (−2.0) |
44.1 (6.7) |
45.9 (7.7) |
38.3 (3.5) |
27.3 (−2.6) |
19.9 (−6.7) |
15.1 (−9.4) |
26.2 (−3.2) |
| Mean monthly sunshine hours | 231.7 | 228.6 | 286.3 | 321.0 | 369.5 | 371.8 | 324.2 | 311.9 | 298.5 | 282.8 | 229.3 | 219.8 | 3,475.4 |
| Percent possible sunshine | 74 | 75 | 77 | 82 | 85 | 86 | 73 | 75 | 80 | 81 | 74 | 72 | 78 |
| Average ultraviolet index | 2 | 2 | 3 | 4 | 5 | 6 | 6 | 6 | 5 | 3 | 2 | 2 | 4 |
| Source 1: NOAA (relative humidity 1961–1990, sun 1973–1990)[1][2][3][4] | |||||||||||||
| Source 2: Weather Atlas (UV)[5] | |||||||||||||
- ^ 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.
- ^ Official records for Flagstaff were kept at the Weather Bureau in downtown from September 8, 1898 to January 11, 1950, and at Pulliam Airport since January 12, 1950. For more information, see ThreadEx
- ^ "NOWData – NOAA Online Weather Data". National Oceanic and Atmospheric Administration. Retrieved 2022-08-05.
- ^ "U.S. Climate Normals Quick Access – Station: Flagstaff Pulliam AP, AZ". National Oceanic and Atmospheric Administration. Archived from the original on 2023-06-18. Retrieved December 30, 2022.
- ^ "Station Name: AZ FLAGSTAFF PULLIAM AP". National Oceanic and Atmospheric Administration. Archived from the original on 2023-06-18. Retrieved 2019-10-20.
- ^ "NOAA". NOAA. Archived from the original on 2023-06-18.
- ^ "Climate and monthly weather forecast Flagstaff, AZ". Retrieved August 16, 2022.