Autumn weather

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

Temperatures

Maximum Temperatures

Period	Chicago	Houston	Atlanta
Sep 1	77.5°F	90.9°F	86.9°F
Sep 8	74.7°F	89.8°F	84.2°F
Sep 15	77.7°F	90.3°F	83.3°F
Sep 22	71.2°F	88.9°F	83.1°F
Oct 1	69.1°F	88.3°F	81.1°F
Oct 8	65.1°F	86.4°F	77.7°F
Oct 15	60.1°F	81.0°F	71.4°F
Oct 22	55.9°F	77.7°F	70.9°F
Nov 1	53.6°F	77.2°F	68.2°F
Nov 8	47.7°F	71.4°F	63.0°F
Nov 15	45.1°F	70.3°F	61.0°F
Nov 22	43.0°F	70.3°F	59.5°F
Average	74.2°F	61.7°F	81.9°F

Minimum Temperatures

Period	Chicago	Houston	Atlanta
Sep 1	65.3°F	77.2°F	70.5°F
Sep 8	63.3°F	75.0°F	68.9°F
Sep 15	65.3°F	76.5°F	67.6°F
Sep 22	60.8°F	73.9°F	66.9°F
Oct 1	57.9°F	72.7°F	64.6°F
Oct 8	53.6°F	70.3°F	62.2°F
Oct 15	47.5°F	64.4°F	53.6°F
Oct 22	46.6°F	63.3°F	54.7°F
Nov 1	43.5°F	62.4°F	52.2°F
Nov 8	37.2°F	57.6°F	49.3°F
Nov 15	35.4°F	55.9°F	44.2°F
Nov 22	33.8°F	55.4°F	43.7°F
Average	58.2°F	50.8°F	67.1°F

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

Conditions

Sunny Weather

Period	Chicago	Houston	Atlanta
Sep 1	7.5 hours/day	4.4 hours/day	6.8 hours/day
Sep 8	7.4 hours/day	5.4 hours/day	5.3 hours/day
Sep 15	7.5 hours/day	4.2 hours/day	6.0 hours/day
Sep 22	6.8 hours/day	6.1 hours/day	6.3 hours/day
Oct 1	4.8 hours/day	7.1 hours/day	7.0 hours/day
Oct 8	5.3 hours/day	5.9 hours/day	6.4 hours/day
Oct 15	5.8 hours/day	5.3 hours/day	7.0 hours/day
Oct 22	3.1 hours/day	4.9 hours/day	5.7 hours/day
Nov 1	4.7 hours/day	4.1 hours/day	4.9 hours/day
Nov 8	4.4 hours/day	4.1 hours/day	4.2 hours/day
Nov 15	2.3 hours/day	4.5 hours/day	6.0 hours/day
Nov 22	3.5 hours/day	4.7 hours/day	5.2 hours/day
Average	5.9 hours/day	5.3 hours/day	5.1 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	Chicago	Houston	Atlanta
Sep 1	0.1in	0.2in	0.1in
Sep 8	0.1in	0.2in	0.2in
Sep 15	0.1in	0.3in	0.2in
Sep 22	0.1in	0.2in	0.3in
Oct 1	0.1in	0.1in	0.1in
Oct 8	0.2in	0.1in	0.1in
Oct 15	0.1in	0.1in	0.0in
Oct 22	0.2in	0.2in	0.2in
Nov 1	0.1in	0.2in	0.4in
Nov 8	0.1in	0.3in	0.2in
Nov 15	0.1in	0.1in	0.1in
Nov 22	0.1in	0.2in	0.1in
Average	0.2in	0.1in	0.2in

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

Wind Speed

Period	Chicago	Houston	Atlanta
Sep 1	12.8mph	9.6mph	8.5mph
Sep 8	11.4mph	10.1mph	9.0mph
Sep 15	11.3mph	10.2mph	7.9mph
Sep 22	13.4mph	10.1mph	8.5mph
Oct 1	12.9mph	9.1mph	8.1mph
Oct 8	14.0mph	10.7mph	9.0mph
Oct 15	15.0mph	11.0mph	9.0mph
Oct 22	15.0mph	11.9mph	9.6mph
Nov 1	14.6mph	10.0mph	8.7mph
Nov 8	14.6mph	10.9mph	10.1mph
Nov 15	16.0mph	10.2mph	9.2mph
Nov 22	14.6mph	10.9mph	9.8mph
Average	9.0mph	13.8mph	10.4mph

Humidity

Period	Chicago	Houston	Atlanta
Sep 1	63.7%	67.8%	59.9%
Sep 8	65.4%	63.6%	64.8%
Sep 15	67.3%	70.5%	62.9%
Sep 22	66.0%	64.5%	59.3%
Oct 1	66.1%	61.6%	60.8%
Oct 8	64.7%	64.2%	64.4%
Oct 15	59.3%	61.4%	55.0%
Oct 22	67.5%	65.4%	63.5%
Nov 1	65.2%	70.0%	63.1%
Nov 8	64.6%	68.8%	65.2%
Nov 15	70.7%	65.1%	58.8%
Nov 22	69.8%	66.7%	63.0%
Average	61.7%	65.9%	65.8%

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Astronomy

Sunrise Time

Period	Chicago	Houston	Atlanta
Sep 1	6:19	7:01	7:14
Sep 8	6:26	7:04	7:19
Sep 15	6:34	7:08	7:23
Sep 22	6:42	7:12	7:29
Oct 1	6:51	7:17	7:35
Oct 8	6:59	7:21	7:40
Oct 15	7:07	7:25	7:46
Oct 22	7:17	7:31	7:52
Nov 1	7:04	7:14	7:36
Nov 8	6:35	6:43	7:06
Nov 15	6:44	6:49	7:13
Nov 22	6:53	6:55	7:20
Average	7:30	6:48	7:06

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

Sunset Time

Period	Chicago	Houston	Atlanta
Sep 1	19:19	19:40	19:59
Sep 8	19:07	19:32	19:49
Sep 15	18:55	19:23	19:40
Sep 22	18:40	19:13	19:29
Oct 1	18:26	19:03	19:18
Oct 8	18:15	18:55	19:08
Oct 15	18:04	18:47	19:00
Oct 22	17:52	18:39	18:50
Nov 1	17:17	18:08	18:19
Nov 8	16:33	17:28	17:37
Nov 15	16:27	17:25	17:33
Nov 22	16:22	17:22	17:30
Average	18:54	17:54	18:36

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

Useful Day Length

Period	Chicago	Houston	Atlanta
Sep 1	12:19 hours	12:40 hours	12:45 hours
Sep 8	12:07 hours	12:28 hours	12:31 hours
Sep 15	11:55 hours	12:15 hours	12:16 hours
Sep 22	11:40 hours	12:01 hours	12:00 hours
Oct 1	11:26 hours	11:46 hours	11:43 hours
Oct 8	11:15 hours	11:34 hours	11:29 hours
Oct 15	10:58 hours	11:22 hours	11:14 hours
Oct 22	10:35 hours	11:08 hours	10:58 hours
Nov 1	10:14 hours	10:55 hours	10:43 hours
Nov 8	9:33 hours	10:28 hours	10:31 hours
Nov 15	9:27 hours	10:25 hours	10:20 hours
Nov 22	9:22 hours	10:22 hours	10:10 hours
Average	11:24 hours	10:54 hours	11:24 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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Autumn weather

Temperatures

Conditions

Astronomy

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