Summer weather

Calculations are based on the last 8 years of historical weather data.

Temperatures

Maximum Temperatures

Period	Johannesburg	Cape Town	Rustenburg
Jun 1	67.5°F	66.0°F	71.2°F
Jun 8	65.5°F	64.9°F	69.1°F
Jun 15	66.2°F	64.6°F	69.6°F
Jun 22	65.8°F	63.1°F	69.3°F
Jul 1	66.4°F	62.4°F	70.0°F
Jul 8	65.1°F	60.8°F	68.9°F
Jul 15	66.2°F	62.2°F	68.9°F
Jul 22	67.6°F	62.4°F	71.1°F
Aug 1	70.7°F	62.6°F	74.7°F
Aug 8	71.8°F	61.0°F	76.6°F
Aug 15	71.4°F	62.1°F	76.3°F
Aug 22	74.3°F	62.2°F	78.3°F
Average	62.9°F	68.2°F	72.0°F

Minimum Temperatures

Period	Johannesburg	Cape Town	Rustenburg
Jun 1	46.4°F	53.4°F	46.2°F
Jun 8	45.3°F	54.1°F	45.3°F
Jun 15	45.7°F	52.7°F	45.3°F
Jun 22	46.0°F	52.3°F	45.3°F
Jul 1	44.8°F	51.1°F	44.2°F
Jul 8	44.4°F	49.8°F	44.2°F
Jul 15	43.9°F	50.4°F	43.3°F
Jul 22	45.7°F	50.5°F	45.0°F
Aug 1	49.5°F	50.5°F	48.4°F
Aug 8	50.2°F	50.5°F	50.5°F
Aug 15	49.3°F	50.2°F	50.0°F
Aug 22	51.1°F	50.4°F	51.1°F
Average	51.3°F	46.9°F	46.6°F

Maximum/minimum temperature averages are computed by averaging the max/min temperature of each day for a given period.

Conditions

Sunny Weather

Period	Johannesburg	Cape Town	Rustenburg
Jun 1	10.3 hours/day	5.8 hours/day	10.6 hours/day
Jun 8	10.6 hours/day	4.3 hours/day	10.8 hours/day
Jun 15	10.4 hours/day	5.1 hours/day	10.4 hours/day
Jun 22	10.1 hours/day	5.0 hours/day	10.1 hours/day
Jul 1	10.7 hours/day	5.0 hours/day	10.7 hours/day
Jul 8	9.9 hours/day	4.7 hours/day	10.1 hours/day
Jul 15	10.2 hours/day	5.4 hours/day	10.3 hours/day
Jul 22	10.6 hours/day	6.2 hours/day	10.5 hours/day
Aug 1	10.4 hours/day	7.3 hours/day	10.5 hours/day
Aug 8	10.5 hours/day	5.1 hours/day	10.5 hours/day
Aug 15	10.4 hours/day	5.7 hours/day	10.5 hours/day
Aug 22	10.3 hours/day	5.4 hours/day	10.2 hours/day
Average	5.4 hours/day	10.4 hours/day	10.4 hours/day

Sun hours are computed from the number of hours of direct sunlight. The length of the day can affect these measurements; for example, northern cities have longer days in summer.

Precipitation Levels

Period	Johannesburg	Cape Town	Rustenburg
Jun 1	0.0in	0.1in	0.0in
Jun 8	0.0in	0.2in	0.0in
Jun 15	0.0in	0.1in	0.0in
Jun 22	0.0in	0.2in	0.0in
Jul 1	0.0in	0.1in	0.0in
Jul 8	0.0in	0.3in	0.0in
Jul 15	0.0in	0.1in	0.0in
Jul 22	0.0in	0.1in	0.0in
Aug 1	0.0in	0.0in	0.0in
Aug 8	0.0in	0.1in	0.0in
Aug 15	0.0in	0.1in	0.0in
Aug 22	0.0in	0.1in	0.0in
Average	0.1in	0.0in	0.0in

Average amount of precipitation that falls in a form of a rain, snow, sleet or hail.

Wind Speed

Period	Johannesburg	Cape Town	Rustenburg
Jun 1	8.8mph	11.2mph	8.4mph
Jun 8	8.4mph	12.1mph	8.3mph
Jun 15	8.6mph	11.9mph	8.1mph
Jun 22	8.8mph	12.4mph	8.1mph
Jul 1	8.7mph	11.4mph	8.1mph
Jul 8	9.8mph	13.6mph	9.4mph
Jul 15	7.9mph	10.1mph	8.3mph
Jul 22	8.6mph	11.1mph	8.7mph
Aug 1	9.9mph	9.8mph	9.9mph
Aug 8	11.1mph	12.8mph	10.9mph
Aug 15	11.6mph	11.0mph	11.6mph
Aug 22	11.3mph	11.9mph	11.3mph
Average	11.6mph	9.5mph	9.3mph

Humidity

Period	Johannesburg	Cape Town	Rustenburg
Jun 1	34.8%	66.8%	36.0%
Jun 8	37.1%	67.5%	38.4%
Jun 15	38.0%	66.1%	40.7%
Jun 22	41.8%	72.4%	43.3%
Jul 1	35.2%	73.0%	36.4%
Jul 8	38.1%	71.7%	39.5%
Jul 15	32.3%	69.9%	34.4%
Jul 22	32.7%	70.2%	34.3%
Aug 1	33.8%	71.7%	35.3%
Aug 8	31.3%	71.9%	32.0%
Aug 15	31.8%	69.2%	32.6%
Aug 22	30.8%	68.1%	31.7%
Average	69.9%	34.8%	36.2%

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Astronomy

Sunrise Time

Period	Johannesburg	Cape Town	Rustenburg
Jun 1	6:49	7:45	6:51
Jun 8	6:52	7:48	6:54
Jun 15	6:54	7:51	6:56
Jun 22	6:55	7:52	6:58
Jul 1	6:56	7:52	6:58
Jul 8	6:55	7:51	6:58
Jul 15	6:53	7:48	6:56
Jul 22	6:50	7:43	6:52
Aug 1	6:45	7:37	6:47
Aug 8	6:40	7:30	6:43
Aug 15	6:34	7:22	6:37
Aug 22	6:26	7:12	6:29
Average	7:42	6:48	6:48

Sunrise times are output in the local timezone of each place.

Sunset Time

Period	Johannesburg	Cape Town	Rustenburg
Jun 1	17:23	17:45	17:28
Jun 8	17:23	17:44	17:28
Jun 15	17:24	17:44	17:29
Jun 22	17:26	17:47	17:31
Jul 1	17:29	17:50	17:33
Jul 8	17:32	17:53	17:36
Jul 15	17:35	17:58	17:39
Jul 22	17:39	18:03	17:43
Aug 1	17:43	18:09	17:47
Aug 8	17:46	18:14	17:50
Aug 15	17:50	18:19	17:53
Aug 22	17:53	18:25	17:57
Average	18:00	17:36	17:42

Sunset times are output in the local timezone of each place.

Useful Day Length

Period	Johannesburg	Cape Town	Rustenburg
Jun 1	10:23 hours	10:00 hours	10:28 hours
Jun 8	10:23 hours	9:56 hours	10:28 hours
Jun 15	10:24 hours	9:53 hours	10:29 hours
Jun 22	10:26 hours	9:55 hours	10:31 hours
Jul 1	10:29 hours	9:58 hours	10:33 hours
Jul 8	10:32 hours	10:02 hours	10:36 hours
Jul 15	10:35 hours	10:10 hours	10:39 hours
Jul 22	10:39 hours	10:20 hours	10:43 hours
Aug 1	10:43 hours	10:32 hours	10:47 hours
Aug 8	10:46 hours	10:44 hours	10:50 hours
Aug 15	10:50 hours	10:56 hours	10:53 hours
Aug 22	10:53 hours	11:13 hours	10:57 hours
Average	10:18 hours	10:36 hours	10:42 hours

Discards daylight hours before 7 AM. In places that are located to the west of the timezone, the sun rises and sets later compared to the cities that are located to the east. This means that the useful day length is longer in the cities located to the west of the time zone.

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Summer weather

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