Winter weather

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

Temperatures

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Maximum Temperatures

Period	Seattle	Las Vegas
Dec 1	46.4°F	58.1°F
Dec 8	45.7°F	54.3°F
Dec 15	45.9°F	53.6°F
Dec 22	43.7°F	52.3°F
Jan 1	45.7°F	52.2°F
Jan 8	45.7°F	53.2°F
Jan 15	45.0°F	54.7°F
Jan 22	46.6°F	54.9°F
Feb 1	45.7°F	57.4°F
Feb 8	43.9°F	56.8°F
Feb 15	45.5°F	56.3°F
Feb 22	46.0°F	57.0°F
Average	55.1°F	45.5°F

Minimum Temperatures

Period	Seattle	Las Vegas
Dec 1	36.1°F	40.8°F
Dec 8	37.6°F	37.8°F
Dec 15	37.9°F	36.9°F
Dec 22	35.4°F	37.9°F
Jan 1	37.4°F	37.2°F
Jan 8	36.7°F	37.0°F
Jan 15	36.3°F	38.8°F
Jan 22	37.0°F	37.8°F
Feb 1	36.5°F	40.1°F
Feb 8	32.9°F	39.9°F
Feb 15	35.2°F	39.6°F
Feb 22	33.8°F	39.6°F
Average	38.6°F	36.1°F

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

Conditions

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Sunny Weather

Period	Seattle	Las Vegas
Dec 1	2.2 hours/day	8.0 hours/day
Dec 8	1.4 hours/day	7.6 hours/day
Dec 15	1.0 hours/day	7.1 hours/day
Dec 22	1.4 hours/day	6.2 hours/day
Jan 1	0.9 hours/day	7.1 hours/day
Jan 8	1.5 hours/day	7.4 hours/day
Jan 15	1.4 hours/day	7.1 hours/day
Jan 22	2.2 hours/day	7.8 hours/day
Feb 1	0.6 hours/day	8.0 hours/day
Feb 8	1.9 hours/day	7.8 hours/day
Feb 15	1.0 hours/day	8.3 hours/day
Feb 22	2.1 hours/day	8.4 hours/day
Average	7.6 hours/day	1.5 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	Seattle	Las Vegas
Dec 1	0.2in	0.0in
Dec 8	0.2in	0.0in
Dec 15	0.4in	0.0in
Dec 22	0.3in	0.0in
Jan 1	0.4in	0.0in
Jan 8	0.3in	0.0in
Jan 15	0.2in	0.0in
Jan 22	0.2in	0.0in
Feb 1	0.3in	0.0in
Feb 8	0.2in	0.0in
Feb 15	0.2in	0.0in
Feb 22	0.2in	0.0in
Average	0.0in	0.3in

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

Wind Speed

Period	Seattle	Las Vegas
Dec 1	6.9mph	6.9mph
Dec 8	8.2mph	7.4mph
Dec 15	9.4mph	6.1mph
Dec 22	8.8mph	7.4mph
Jan 1	9.4mph	7.3mph
Jan 8	7.9mph	7.7mph
Jan 15	7.6mph	7.9mph
Jan 22	7.7mph	7.9mph
Feb 1	8.8mph	10.1mph
Feb 8	7.3mph	9.1mph
Feb 15	7.5mph	10.4mph
Feb 22	9.1mph	10.5mph
Average	8.2mph	8.2mph

Humidity

Period	Seattle	Las Vegas
Dec 1	83.8%	38.5%
Dec 8	83.8%	37.0%
Dec 15	84.0%	33.8%
Dec 22	85.5%	43.3%
Jan 1	84.4%	41.9%
Jan 8	84.2%	42.0%
Jan 15	83.0%	44.3%
Jan 22	83.4%	40.6%
Feb 1	84.0%	41.0%
Feb 8	80.0%	37.0%
Feb 15	82.6%	38.5%
Feb 22	77.6%	35.5%
Average	39.5%	83.0%

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Astronomy

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Sunrise Time

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

Sunset Time

Period	Seattle	Las Vegas
Dec 1	16:19	16:25
Dec 8	16:17	16:26
Dec 15	16:19	16:28
Dec 22	16:24	16:33
Jan 1	16:31	16:39
Jan 8	16:40	16:46
Jan 15	16:49	16:53
Jan 22	17:02	17:02
Feb 1	17:16	17:11
Feb 8	17:26	17:18
Feb 15	17:38	17:25
Feb 22	17:49	17:32
Average	16:54	16:54

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

Useful Day Length

Period	Seattle	Las Vegas
Dec 1	8:38 hours	9:25 hours
Dec 8	8:29 hours	9:26 hours
Dec 15	8:25 hours	9:28 hours
Dec 22	8:27 hours	9:33 hours
Jan 1	8:34 hours	9:39 hours
Jan 8	8:44 hours	9:46 hours
Jan 15	8:59 hours	9:53 hours
Jan 22	9:20 hours	10:02 hours
Feb 1	9:44 hours	10:11 hours
Feb 8	10:05 hours	10:18 hours
Feb 15	10:28 hours	10:25 hours
Feb 22	10:49 hours	10:32 hours
Average	9:54 hours	9:12 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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	Seattle US	Las Vegas US
Today Sat May 10
Sun May 11
Mon May 12
Tue May 13
Wed May 14
Thu May 15
Fri May 16

	Today Sat May 10	Sun May 11	Mon May 12	Tue May 13	Wed May 14	Thu May 15	Fri May 16	Sat May 17	Sun May 18	Mon May 19	Tue May 20	Wed May 21	Thu May 22	Fri May 23
Seattle US
Las Vegas US

Period	Seattle	Las Vegas
Dec 1	7:41	6:36
Dec 8	7:48	6:41
Dec 15	7:53	6:46
Dec 22	7:57	6:50
Jan 1	7:58	6:52
Jan 8	7:55	6:52
Jan 15	7:50	6:50
Jan 22	7:43	6:45
Feb 1	7:32	6:39
Feb 8	7:22	6:32
Feb 15	7:10	6:24
Feb 22	6:57	6:16
Average	6:42	7:36

Weather in Seattle and Las Vegas

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Daily Forecast

Winter weather

Temperatures

Conditions

Astronomy

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