Template:Johannesburg weatherbox
| Climate data for Johannesburg (Averages: 1961–1990 – extremes: 1951–1990) | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Record high °C (°F) | 41.4 (106.5) |
33.5 (92.3) |
31.9 (89.4) |
29.3 (84.7) |
26.4 (79.5) |
23.1 (73.6) |
24.4 (75.9) |
26.2 (79.2) |
30.0 (86.0) |
32.2 (90.0) |
38.5 (101.3) |
39.4 (102.9) |
41.4 (106.5) |
| Mean maximum °C (°F) | 30.2 (86.4) |
29.1 (84.4) |
28.0 (82.4) |
25.5 (77.9) |
23.0 (73.4) |
20.4 (68.7) |
21.1 (70.0) |
24.4 (75.9) |
28.4 (83.1) |
29.4 (84.9) |
29.5 (85.1) |
29.8 (85.6) |
31.4 (88.5) |
| Mean daily maximum °C (°F) | 25.6 (78.1) |
25.1 (77.2) |
24.0 (75.2) |
21.1 (70.0) |
18.9 (66.0) |
16.0 (60.8) |
16.7 (62.1) |
19.4 (66.9) |
22.8 (73.0) |
23.8 (74.8) |
24.2 (75.6) |
25.2 (77.4) |
21.9 (71.4) |
| Daily mean °C (°F) | 19.5 (67.1) |
19.0 (66.2) |
18.0 (64.4) |
15.3 (59.5) |
12.6 (54.7) |
9.6 (49.3) |
10.0 (50.0) |
12.5 (54.5) |
15.9 (60.6) |
17.1 (62.8) |
17.9 (64.2) |
19.0 (66.2) |
15.5 (59.9) |
| Mean daily minimum °C (°F) | 14.7 (58.5) |
14.1 (57.4) |
13.1 (55.6) |
10.3 (50.5) |
7.2 (45.0) |
4.1 (39.4) |
4.1 (39.4) |
6.2 (43.2) |
9.3 (48.7) |
11.2 (52.2) |
12.7 (54.9) |
13.9 (57.0) |
10.1 (50.2) |
| Mean minimum °C (°F) | 11.0 (51.8) |
10.3 (50.5) |
8.5 (47.3) |
4.7 (40.5) |
1.6 (34.9) |
−1.9 (28.6) |
−1.9 (28.6) |
−0.6 (30.9) |
1.8 (35.2) |
4.7 (40.5) |
7.3 (45.1) |
9.5 (49.1) |
−3.1 (26.4) |
| Record low °C (°F) | 7.2 (45.0) |
6.0 (42.8) |
2.1 (35.8) |
0.5 (32.9) |
−2.5 (27.5) |
−8.2 (17.2) |
−5.1 (22.8) |
−5.0 (23.0) |
−3.3 (26.1) |
0.2 (32.4) |
1.5 (34.7) |
3.5 (38.3) |
−8.2 (17.2) |
| Average precipitation mm (inches) | 125 (4.9) |
90 (3.5) |
91 (3.6) |
54 (2.1) |
13 (0.5) |
9 (0.4) |
4 (0.2) |
6 (0.2) |
27 (1.1) |
72 (2.8) |
117 (4.6) |
105 (4.1) |
713 (28.1) |
| Average precipitation days (≥ 0.1 mm) | 15.9 | 11.2 | 11.9 | 8.6 | 2.9 | 2.0 | 1.0 | 2.1 | 3.8 | 9.8 | 15.2 | 14.9 | 99.3 |
| Average relative humidity (%) | 69 | 70 | 68 | 65 | 56 | 53 | 49 | 46 | 47 | 56 | 65 | 66 | 59 |
| Mean monthly sunshine hours | 250.1 | 224.8 | 238.8 | 236.9 | 276.0 | 266.9 | 283.9 | 284.1 | 280.8 | 269.5 | 248.7 | 263.9 | 3,124.4 |
| Mean daily daylight hours | 13.6 | 13.0 | 12.2 | 11.5 | 10.8 | 10.5 | 10.7 | 11.2 | 12.0 | 12.7 | 13.4 | 13.8 | 12.1 |
| Average ultraviolet index | 14 | 14 | 12 | 9 | 6 | 5 | 5 | 7 | 9 | 12 | 14 | 14 | 10 |
| Source 1: World Meteorological Organization,[1] NOAA[2] | |||||||||||||
| Source 2: South African Weather Service[3] Weather Atlas[4] | |||||||||||||
References
- ^ "World Weather Information Service – Johannesburg". World Meteorological Organization. Retrieved 8 April 2013.
- ^ "Johannesburg/Jan Smuts Climate Normals 1961–1990". National Oceanic and Atmospheric Administration. Retrieved 8 April 2013.
- ^ "Climate data for Johannesburg". South African Weather Service. Archived from the original on 8 March 2010. Retrieved 6 March 2010.
- ^ "Monthly weather forecast and climate Johannesburg, South Africa". Weather Atlas. Retrieved 11 June 2020.