| Climate data for Atlantic 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) | 78 (26) |
76 (24) |
87 (31) |
94 (34) |
99 (37) |
106 (41) |
105 (41) |
103 (39) |
99 (37) |
96 (36) |
84 (29) |
77 (25) |
106 (41) |
| Mean maximum °F (°C) | 63.5 (17.5) |
64.8 (18.2) |
73.2 (22.9) |
83.2 (28.4) |
89.3 (31.8) |
94.5 (34.7) |
96.9 (36.1) |
94.6 (34.8) |
90.1 (32.3) |
82.8 (28.2) |
72.7 (22.6) |
65.3 (18.5) |
98.1 (36.7) |
| Mean daily maximum °F (°C) | 43.2 (6.2) |
45.8 (7.7) |
52.6 (11.4) |
63.3 (17.4) |
72.5 (22.5) |
81.5 (27.5) |
86.6 (30.3) |
84.8 (29.3) |
78.5 (25.8) |
67.7 (19.8) |
57.1 (13.9) |
48.1 (8.9) |
65.1 (18.4) |
| Daily mean °F (°C) | 34.1 (1.2) |
36.0 (2.2) |
42.6 (5.9) |
52.5 (11.4) |
61.9 (16.6) |
71.4 (21.9) |
76.9 (24.9) |
75.0 (23.9) |
68.4 (20.2) |
57.1 (13.9) |
46.8 (8.2) |
38.7 (3.7) |
55.1 (12.8) |
| Mean daily minimum °F (°C) | 25.1 (−3.8) |
26.2 (−3.2) |
32.6 (0.3) |
41.7 (5.4) |
51.4 (10.8) |
61.3 (16.3) |
67.2 (19.6) |
65.2 (18.4) |
58.2 (14.6) |
46.4 (8.0) |
36.6 (2.6) |
29.4 (−1.4) |
45.1 (7.3) |
| Mean minimum °F (°C) | 6.5 (−14.2) |
9.7 (−12.4) |
16.1 (−8.8) |
26.7 (−2.9) |
36.0 (2.2) |
46.2 (7.9) |
55.9 (13.3) |
53.8 (12.1) |
43.5 (6.4) |
31.0 (−0.6) |
20.4 (−6.4) |
14.0 (−10.0) |
4.4 (−15.3) |
| Record low °F (°C) | −10 (−23) |
−11 (−24) |
2 (−17) |
12 (−11) |
25 (−4) |
37 (3) |
42 (6) |
40 (4) |
32 (0) |
20 (−7) |
10 (−12) |
−7 (−22) |
−11 (−24) |
| Average precipitation inches (mm) | 3.38 (86) |
3.23 (82) |
4.52 (115) |
3.32 (84) |
3.34 (85) |
3.58 (91) |
4.47 (114) |
4.59 (117) |
3.55 (90) |
4.14 (105) |
3.37 (86) |
4.47 (114) |
45.96 (1,167) |
| Average snowfall inches (cm) | 5.7 (14) |
5.9 (15) |
2.2 (5.6) |
0.3 (0.76) |
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 (0.25) |
3.2 (8.1) |
17.4 (44) |
| Average extreme snow depth inches (cm) | 3.6 (9.1) |
3.1 (7.9) |
1.3 (3.3) |
0.1 (0.25) |
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) |
1.9 (4.8) |
6.0 (15) |
| Average precipitation days (≥ 0.01 in) | 10.8 | 10.4 | 10.9 | 11.4 | 10.5 | 9.9 | 9.9 | 9.2 | 8.5 | 8.9 | 8.9 | 10.8 | 120.1 |
| Average snowy days (≥ 0.1 in) | 3.0 | 3.2 | 1.2 | 0.1 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 1.4 | 8.9 |
| Average relative humidity (%) | 69.5 | 69.0 | 66.9 | 66.4 | 70.7 | 72.9 | 73.9 | 75.7 | 76.4 | 74.8 | 72.8 | 70.6 | 71.6 |
| Average dew point °F (°C) | 21.6 (−5.8) |
23.2 (−4.9) |
30.0 (−1.1) |
37.9 (3.3) |
49.5 (9.7) |
59.4 (15.2) |
64.8 (18.2) |
64.2 (17.9) |
57.7 (14.3) |
46.4 (8.0) |
37.0 (2.8) |
27.0 (−2.8) |
43.2 (6.2) |
| Mean monthly sunshine hours | 150.8 | 157.9 | 204.5 | 218.9 | 243.9 | 266.2 | 276.3 | 271.3 | 227.6 | 200.5 | 147.4 | 133.8 | 2,499.1 |
| Percent possible sunshine | 50 | 53 | 55 | 55 | 55 | 60 | 61 | 64 | 61 | 58 | 49 | 46 | 56 |
| Average ultraviolet index | 1.6 | 2.6 | 4.2 | 6.0 | 7.5 | 8.5 | 8.6 | 7.7 | 6.0 | 3.8 | 2.1 | 1.5 | 5.0 |
| Source 1: NOAA (relative humidity, dew point and sun 1961–1990)[2][3][4] | |||||||||||||
| Source 2: UV Index Today (1995 to 2022)[5] | |||||||||||||
- ^ 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.
- ^ The official climatology station for Atlantic City was at the Weather Bureau Office downtown from January 1874 to 15 June 1958 and Atlantic City Int'l (ACY) in Egg Harbor Township since 16 June 1958.[1] ACY's location in the Pine Barrens and distance away from the coast and urban heat island of downtown Atlantic City largely account for its markedly colder temperatures at night as compared to downtown; for example, from 1959 to 2013, there were 50 days with a low of 0 °F (−18 °C) or lower, while in the same period, the corresponding number of days at downtown was 2. The National Weather Service ceased regular snowfall observations at downtown after the winter of 1958–59.
- ^ Threadex
- ^ "NowData – NOAA Online Weather Data". National Oceanic and Atmospheric Administration. Retrieved August 11, 2021.
- ^ "Station: ATLANTIC CITY INTL AP, NJ". U.S. Climate Normals 2020: U.S. Monthly Climate Normals (1991–2020). National Oceanic and Atmospheric Administration. Archived from the original on 2024-06-08. Retrieved August 11, 2021.
- ^ "WMO Climate Normals for ATLANTIC CITY, NJ 1961–1990". National Oceanic and Atmospheric Administration. Archived from the original on 2024-06-08. Retrieved August 11, 2021.
- ^ "Historical UV Index Data - Atlantic City, NJ". UV Index Today. Retrieved April 22, 2023.