| Climate data for Atlanta (Hartsfield–Jackson Int'l), 1991–2020 normals,[a] extremes 1878–present[b] | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Record high °F (°C) | 79 (26) |
81 (27) |
89 (32) |
93 (34) |
97 (36) |
106 (41) |
105 (41) |
104 (40) |
102 (39) |
98 (37) |
84 (29) |
79 (26) |
106 (41) |
| Mean maximum °F (°C) | 70.3 (21.3) |
73.5 (23.1) |
80.8 (27.1) |
84.7 (29.3) |
89.6 (32.0) |
94.3 (34.6) |
95.8 (35.4) |
95.9 (35.5) |
91.9 (33.3) |
85.0 (29.4) |
77.5 (25.3) |
71.5 (21.9) |
97.3 (36.3) |
| Mean daily maximum °F (°C) | 54.0 (12.2) |
58.2 (14.6) |
65.9 (18.8) |
73.8 (23.2) |
81.1 (27.3) |
87.1 (30.6) |
90.1 (32.3) |
89.0 (31.7) |
83.9 (28.8) |
74.4 (23.6) |
64.1 (17.8) |
56.2 (13.4) |
73.2 (22.9) |
| Daily mean °F (°C) | 44.8 (7.1) |
48.5 (9.2) |
55.6 (13.1) |
63.2 (17.3) |
71.2 (21.8) |
77.9 (25.5) |
80.9 (27.2) |
80.2 (26.8) |
74.9 (23.8) |
64.7 (18.2) |
54.2 (12.3) |
47.3 (8.5) |
63.6 (17.6) |
| Mean daily minimum °F (°C) | 35.6 (2.0) |
38.9 (3.8) |
45.3 (7.4) |
52.5 (11.4) |
61.3 (16.3) |
68.6 (20.3) |
71.8 (22.1) |
71.3 (21.8) |
65.9 (18.8) |
54.9 (12.7) |
44.2 (6.8) |
38.4 (3.6) |
54.1 (12.3) |
| Mean minimum °F (°C) | 17.3 (−8.2) |
23.2 (−4.9) |
28.1 (−2.2) |
36.9 (2.7) |
47.6 (8.7) |
59.9 (15.5) |
65.6 (18.7) |
64.5 (18.1) |
53.4 (11.9) |
38.7 (3.7) |
29.2 (−1.6) |
23.8 (−4.6) |
15.2 (−9.3) |
| Record low °F (°C) | −8 (−22) |
−9 (−23) |
10 (−12) |
25 (−4) |
37 (3) |
39 (4) |
53 (12) |
55 (13) |
36 (2) |
28 (−2) |
3 (−16) |
0 (−18) |
−9 (−23) |
| Average precipitation inches (mm) | 4.59 (117) |
4.55 (116) |
4.68 (119) |
3.81 (97) |
3.56 (90) |
4.54 (115) |
4.75 (121) |
4.30 (109) |
3.82 (97) |
3.28 (83) |
3.98 (101) |
4.57 (116) |
50.43 (1,281) |
| Average snowfall inches (cm) | 1.0 (2.5) |
0.4 (1.0) |
0.4 (1.0) |
0.0 (0.0) |
0.0 (0.0) |
0.0 (0.0) |
0.0 (0.0) |
0.0 (0.0) |
0.0 (0.0) |
0.0 (0.0) |
0.0 (0.0) |
0.4 (1.0) |
2.2 (5.6) |
| Average precipitation days (≥ 0.01 in) | 11.1 | 10.4 | 10.5 | 8.9 | 9.4 | 11.1 | 12.0 | 10.2 | 7.3 | 6.8 | 7.9 | 10.7 | 116.3 |
| Average snowy days (≥ 0.01 in) | 0.7 | 0.3 | 0.1 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.4 | 1.5 |
| Average relative humidity (%) | 67.6 | 63.4 | 62.4 | 61.0 | 67.2 | 69.8 | 74.4 | 74.8 | 73.9 | 68.5 | 68.1 | 68.4 | 68.3 |
| Average dew point °F (°C) | 29.3 (−1.5) |
30.9 (−0.6) |
38.5 (3.6) |
45.7 (7.6) |
56.1 (13.4) |
63.7 (17.6) |
67.8 (19.9) |
67.5 (19.7) |
62.1 (16.7) |
49.6 (9.8) |
41.0 (5.0) |
33.1 (0.6) |
48.8 (9.3) |
| Mean monthly sunshine hours | 164.0 | 171.7 | 220.5 | 261.2 | 288.6 | 284.8 | 273.8 | 258.6 | 227.5 | 238.5 | 185.1 | 164.0 | 2,738.3 |
| Percent possible sunshine | 52 | 56 | 59 | 67 | 67 | 66 | 63 | 62 | 61 | 68 | 59 | 53 | 62 |
| Average ultraviolet index | 2.8 | 4.1 | 6.1 | 7.9 | 9.1 | 9.7 | 9.9 | 9.2 | 7.4 | 5.2 | 3.3 | 2.5 | 6.4 |
| Source 1: NOAA (relative humidity, dew point and sun 1961–1990)[2][3][4] | |||||||||||||
| Source 2: Extremes[5] UV Index Today (1995 to 2022)[6] | |||||||||||||
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 Atlanta were kept at the Weather Bureau in downtown from October 1878 to August 1928, and at Hartsfield–Jackson Int'l since September 1928.[1]
References
edit- ^ ThreadEx
- ^ "Summary of Monthly Normals 1991–2020". National Oceanic and Atmospheric Administration. Archived from the original on May 4, 2021. Retrieved May 4, 2021.
- ^ "NowData – NOAA Online Weather Data". National Oceanic and Atmospheric Administration. Retrieved May 4, 2021.
- ^ "WMO Climatological Normals of Atlanta/Hartsfield INTL AP, GA". National Oceanic and Atmospheric Administration. Retrieved July 18, 2020.
- ^
"Climatological Normals (CLINO) . for the Period 1961-1990" (PDF). World Meteorological Orgniaztion. 1996. pp. 435, 440. ISBN 92-63-0084 7-7. Retrieved 23 April 2024.
Atlanta/Mun. GA 72219
- ^ "Historical UV Index Data - Atlanta, GA". UV Index Today. Retrieved April 20, 2023.