Autumn weather

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

Temperatures

Maximum Temperatures

Period	Johannesburg	Chicago
Sep 1	77.3°F	77.3°F
Sep 8	79.5°F	74.4°F
Sep 15	81.5°F	77.5°F
Sep 22	80.6°F	71.0°F
Oct 1	79.1°F	68.9°F
Oct 8	81.5°F	65.1°F
Oct 15	82.0°F	59.9°F
Oct 22	81.5°F	55.7°F
Nov 1	81.5°F	53.4°F
Nov 8	80.7°F	47.6°F
Nov 15	83.6°F	45.1°F
Nov 22	81.8°F	42.8°F
Average	61.6°F	80.9°F

Minimum Temperatures

Period	Johannesburg	Chicago
Sep 1	53.7°F	65.1°F
Sep 8	55.2°F	63.1°F
Sep 15	58.1°F	65.3°F
Sep 22	57.0°F	60.6°F
Oct 1	57.0°F	57.7°F
Oct 8	59.3°F	53.6°F
Oct 15	59.7°F	47.3°F
Oct 22	59.9°F	46.4°F
Nov 1	60.4°F	43.3°F
Nov 8	60.8°F	37.0°F
Nov 15	62.4°F	35.4°F
Nov 22	61.7°F	33.8°F
Average	50.7°F	58.8°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	Chicago
Sep 1	9.8 hours/day	7.5 hours/day
Sep 8	10.7 hours/day	7.4 hours/day
Sep 15	10.1 hours/day	7.5 hours/day
Sep 22	10.8 hours/day	6.8 hours/day
Oct 1	9.7 hours/day	4.8 hours/day
Oct 8	9.8 hours/day	5.3 hours/day
Oct 15	9.4 hours/day	5.8 hours/day
Oct 22	8.9 hours/day	3.1 hours/day
Nov 1	8.4 hours/day	4.6 hours/day
Nov 8	7.6 hours/day	4.4 hours/day
Nov 15	8.4 hours/day	2.3 hours/day
Nov 22	8.0 hours/day	3.5 hours/day
Average	5.2 hours/day	9.3 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	Chicago
Sep 1	0.0in	0.1in
Sep 8	0.0in	0.1in
Sep 15	0.0in	0.1in
Sep 22	0.0in	0.1in
Oct 1	0.1in	0.1in
Oct 8	0.1in	0.2in
Oct 15	0.1in	0.1in
Oct 22	0.1in	0.2in
Nov 1	0.1in	0.1in
Nov 8	0.2in	0.1in
Nov 15	0.1in	0.1in
Nov 22	0.1in	0.1in
Average	0.1in	0.1in

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

Wind Speed

Period	Johannesburg	Chicago
Sep 1	10.9mph	12.7mph
Sep 8	10.6mph	11.4mph
Sep 15	12.8mph	11.2mph
Sep 22	12.7mph	13.3mph
Oct 1	11.7mph	12.8mph
Oct 8	11.6mph	13.9mph
Oct 15	12.2mph	14.9mph
Oct 22	12.5mph	14.9mph
Nov 1	12.5mph	14.5mph
Nov 8	11.7mph	14.5mph
Nov 15	12.2mph	15.9mph
Nov 22	11.8mph	14.5mph
Average	13.7mph	11.9mph

Humidity

Period	Johannesburg	Chicago
Sep 1	28.5%	63.7%
Sep 8	25.8%	65.3%
Sep 15	29.3%	67.2%
Sep 22	31.6%	66.0%
Oct 1	37.3%	66.0%
Oct 8	33.6%	64.6%
Oct 15	35.8%	59.3%
Oct 22	37.4%	67.5%
Nov 1	42.4%	65.2%
Nov 8	48.5%	64.5%
Nov 15	39.6%	70.6%
Nov 22	46.1%	69.8%
Average	65.8%	36.3%

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Astronomy

Sunrise Time

Period	Johannesburg	Chicago
Sep 1	6:17	6:20
Sep 8	6:09	6:27
Sep 15	6:02	6:34
Sep 22	5:53	6:42
Oct 1	5:44	6:51
Oct 8	5:37	6:59
Oct 15	5:30	7:07
Oct 22	5:23	7:17
Nov 1	5:16	7:10
Nov 8	5:12	6:35
Nov 15	5:09	6:44
Nov 22	5:08	6:53
Average	6:48	5:36

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

Sunset Time

Period	Johannesburg	Chicago
Sep 1	17:56	19:19
Sep 8	17:59	19:07
Sep 15	18:02	18:54
Sep 22	18:05	18:40
Oct 1	18:09	18:26
Oct 8	18:12	18:15
Oct 15	18:16	18:04
Oct 22	18:21	17:52
Nov 1	18:26	17:24
Nov 8	18:31	16:33
Nov 15	18:37	16:27
Nov 22	18:43	16:22
Average	17:54	18:18

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

Day Length

Period	Johannesburg	Chicago
Sep 1	11:39 hours	12:59 hours
Sep 8	11:50 hours	12:39 hours
Sep 15	12:00 hours	12:20 hours
Sep 22	12:12 hours	11:58 hours
Oct 1	12:25 hours	11:35 hours
Oct 8	12:35 hours	11:16 hours
Oct 15	12:46 hours	10:57 hours
Oct 22	12:58 hours	10:35 hours
Nov 1	13:10 hours	10:13 hours
Nov 8	13:19 hours	9:57 hours
Nov 15	13:27 hours	9:43 hours
Nov 22	13:35 hours	9:28 hours
Average	11:06 hours	12:42 hours

Average length of the day from sunrise to sunset.

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Autumn weather

Temperatures

Conditions

Astronomy

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