Winter weather

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

Temperatures

Maximum Temperatures

Period	Las Vegas	Pittsburgh
Dec 1	58.1°F	42.4°F
Dec 8	54.3°F	42.4°F
Dec 15	53.6°F	40.5°F
Dec 22	52.3°F	41.9°F
Jan 1	52.2°F	37.4°F
Jan 8	53.2°F	38.7°F
Jan 15	54.7°F	32.4°F
Jan 22	54.9°F	35.4°F
Feb 1	57.4°F	39.6°F
Feb 8	56.8°F	39.7°F
Feb 15	56.3°F	43.5°F
Feb 22	57.0°F	47.7°F
Average	55.1°F	40.1°F

Minimum Temperatures

Period	Las Vegas	Pittsburgh
Dec 1	40.8°F	32.0°F
Dec 8	37.8°F	30.7°F
Dec 15	36.9°F	30.6°F
Dec 22	37.9°F	30.6°F
Jan 1	37.2°F	27.9°F
Jan 8	37.0°F	26.4°F
Jan 15	38.8°F	20.5°F
Jan 22	37.8°F	23.0°F
Feb 1	40.1°F	24.8°F
Feb 8	39.9°F	26.6°F
Feb 15	39.6°F	27.5°F
Feb 22	39.6°F	32.7°F
Average	38.6°F	27.8°F

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

Conditions

Sunny Weather

Period	Las Vegas	Pittsburgh
Dec 1	8.0 hours/day	1.4 hours/day
Dec 8	7.6 hours/day	2.4 hours/day
Dec 15	7.1 hours/day	2.2 hours/day
Dec 22	6.2 hours/day	1.0 hours/day
Jan 1	7.1 hours/day	1.7 hours/day
Jan 8	7.4 hours/day	1.4 hours/day
Jan 15	7.1 hours/day	1.2 hours/day
Jan 22	7.8 hours/day	1.0 hours/day
Feb 1	8.0 hours/day	2.2 hours/day
Feb 8	7.8 hours/day	1.3 hours/day
Feb 15	8.3 hours/day	3.0 hours/day
Feb 22	8.4 hours/day	2.5 hours/day
Average	7.6 hours/day	1.8 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	Las Vegas	Pittsburgh
Dec 1	0.0in	0.1in
Dec 8	0.0in	0.2in
Dec 15	0.0in	0.3in
Dec 22	0.0in	0.2in
Jan 1	0.0in	0.2in
Jan 8	0.0in	0.2in
Jan 15	0.0in	0.1in
Jan 22	0.0in	0.1in
Feb 1	0.0in	0.2in
Feb 8	0.0in	0.2in
Feb 15	0.0in	0.2in
Feb 22	0.0in	0.2in
Average	0.0in	0.2in

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

Wind Speed

Period	Las Vegas	Pittsburgh
Dec 1	6.9mph	10.2mph
Dec 8	7.4mph	9.3mph
Dec 15	6.1mph	9.2mph
Dec 22	7.4mph	9.3mph
Jan 1	7.3mph	10.1mph
Jan 8	7.7mph	10.7mph
Jan 15	7.9mph	10.4mph
Jan 22	7.9mph	9.6mph
Feb 1	10.1mph	9.5mph
Feb 8	9.1mph	9.9mph
Feb 15	10.4mph	10.6mph
Feb 22	10.5mph	11.1mph
Average	8.2mph	10.0mph

Humidity

Period	Las Vegas	Pittsburgh
Dec 1	38.5%	74.2%
Dec 8	37.0%	72.4%
Dec 15	33.8%	77.7%
Dec 22	43.3%	81.6%
Jan 1	41.9%	77.7%
Jan 8	42.0%	77.9%
Jan 15	44.3%	79.8%
Jan 22	40.6%	79.5%
Feb 1	41.0%	81.1%
Feb 8	37.0%	76.5%
Feb 15	38.5%	74.4%
Feb 22	35.5%	72.7%
Average	39.5%	77.1%

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Astronomy

Sunrise Time

Period	Las Vegas	Pittsburgh
Dec 1	6:36	7:27
Dec 8	6:41	7:34
Dec 15	6:46	7:38
Dec 22	6:50	7:42
Jan 1	6:52	7:44
Jan 8	6:52	7:43
Jan 15	6:50	7:40
Jan 22	6:45	7:34
Feb 1	6:39	7:26
Feb 8	6:32	7:19
Feb 15	6:24	7:10
Feb 22	6:16	6:59
Average	6:42	7:30

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

Sunset Time

Period	Las Vegas	Pittsburgh
Dec 1	16:25	16:53
Dec 8	16:26	16:53
Dec 15	16:28	16:55
Dec 22	16:33	17:00
Jan 1	16:39	17:07
Jan 8	16:46	17:14
Jan 15	16:53	17:22
Jan 22	17:02	17:32
Feb 1	17:11	17:42
Feb 8	17:18	17:50
Feb 15	17:25	17:59
Feb 22	17:32	18:07
Average	16:54	17:24

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

Useful Day Length

Period	Las Vegas	Pittsburgh
Dec 1	9:25 hours	9:26 hours
Dec 8	9:26 hours	9:20 hours
Dec 15	9:28 hours	9:17 hours
Dec 22	9:33 hours	9:18 hours
Jan 1	9:39 hours	9:23 hours
Jan 8	9:46 hours	9:31 hours
Jan 15	9:53 hours	9:41 hours
Jan 22	10:02 hours	9:58 hours
Feb 1	10:11 hours	10:16 hours
Feb 8	10:18 hours	10:32 hours
Feb 15	10:25 hours	10:49 hours
Feb 22	10:32 hours	11:07 hours
Average	9:54 hours	9:54 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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Winter weather

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