SEA-TAC, WASHINGTON

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Elevation: 137 meters Latitude: 47 27N Longitude: 122 18W

WEATHER

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Number of Records: 224,582; Date Range: 1/1/95 - 3/22/16

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WEATHER ALMANAC - 17 DECEMBER, 2014

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[ °F ] °C

Weather Element	Average	High	Low
Temperature	7.8 ^°C	8.9 ^°C (12:53 am)	6.7 ^°C (3:53 am)
Dewpoint	4.3 ^°C	6.7 ^°C (8:53 pm)	-1.1 ^°C (12:53 am)
Humidity	79.4 ^%	93 ^% (8:53 pm)	50 ^% (12:53 am)
Barometer	1011.9 ^hPa	1014.2 hPa (10:53 pm)	1010.2 hPa (12:53 am)
Wind Speed	5.8 ^km/h	16.7 ^km/h (12:53 am)

Weather Element	Average
Visibility	13.7 ^km
Wind Direction	ESE (103.5 °)

Weather Element	Total
Precipitation	3.05 ^mm
Heating Degree Days	10.6 (Base 18.3)

Averaged from 26 records on 17 December, 2014

WEATHER CONDITIONS BREAKOUT

WIND DIRECTION BREAKOUT

WEATHER BY HOUR - 17 DECEMBER, 2014

[ °F ] °C

Local Time	Temperature	Dewpoint	Humidity	Barometer	Visibility	Wind Direction	Wind Speed	Precipitation	Events	Conditions
12:53 AM	8.9 ^°C	-1.1 ^°C	50 ^%	1010.2 hPa	16.1 ^km	ESE (110°)	16.7 ^km/h			Mostly Cloudy
1:53 AM	8.9 ^°C	-0.6 ^°C	52 ^%	1010.2 hPa	16.1 ^km	SSE (150°)	5.6 ^km/h			Mostly Cloudy
2:53 AM	7.8 ^°C	0.6 ^°C	61 ^%	1010.5 hPa	16.1 ^km	SSW (200°)	5.6 ^km/h			Overcast
3:53 AM	6.7 ^°C	4.4 ^°C	85 ^%	1010.5 hPa	16.1 ^km	SE (140°)	5.6 ^km/h	0.25 mm	Rain	Light Rain
4:53 AM	6.7 ^°C	2.8 ^°C	76 ^%	1010.5 hPa	16.1 ^km	ESE (110°)	16.7 ^km/h	0.76 mm	Rain	Light Rain
5:53 AM	6.7 ^°C	3.3 ^°C	79 ^%	1010.2 hPa	16.1 ^km	East (90°)	11.1 ^km/h	0.51 mm	Rain	Light Rain
6:53 AM	7.2 ^°C	3.3 ^°C	76 ^%	1010.2 hPa	16.1 ^km	ENE (70°)	7.4 ^km/h	0 mm		Overcast
7:53 AM	7.8 ^°C	2.8 ^°C	71 ^%	1010.2 hPa	16.1 ^km	East (90°)	9.3 ^km/h	0 mm	Rain	Light Rain
8:53 AM	7.8 ^°C	2.8 ^°C	71 ^%	1010.5 hPa	16.1 ^km	East (100°)	11.1 ^km/h	0.25 mm		Overcast
9:53 AM	8.3 ^°C	2.8 ^°C	68 ^%	1010.8 hPa	16.1 ^km	ESE (110°)	9.3 ^km/h			Overcast
10:53 AM	8.3 ^°C	4.4 ^°C	77 ^%	1011.2 hPa	16.1 ^km	Calm				Overcast
11:53 AM	8.3 ^°C	4.4 ^°C	77 ^%	1011.2 hPa	16.1 ^km	Calm				Overcast
12:53 PM	8.9 ^°C	4.4 ^°C	74 ^%	1011.2 hPa	16.1 ^km	Variable	5.6 ^km/h			Overcast
1:53 PM	8.9 ^°C	5 ^°C	77 ^%	1011.2 hPa	16.1 ^km	West (260°)	5.6 ^km/h	0 mm	Rain	Light Rain
2:53 PM	8.3 ^°C	5 ^°C	80 ^%	1011.5 hPa	16.1 ^km	SSW (210°)	5.6 ^km/h	0 mm		Overcast
3:53 PM	7.8 ^°C	5 ^°C	83 ^%	1011.9 hPa	16.1 ^km	SW (220°)	5.6 ^km/h			Mostly Cloudy
4:53 PM	8.3 ^°C	6.1 ^°C	86 ^%	1012.5 hPa	16.1 ^km	Calm		0 mm	Rain	Light Rain
5:53 PM	7.8 ^°C	6.1 ^°C	89 ^%	1012.9 hPa	16.1 ^km	SSE (160°)	5.6 ^km/h	0 mm		Overcast
6:53 PM	8.3 ^°C	6.1 ^°C	86 ^%	1013.2 hPa	16.1 ^km	SE (140°)	7.4 ^km/h			Overcast
7:53 PM	7.8 ^°C	6.1 ^°C	89 ^%	1013.9 hPa	11.3 ^km	Calm		0 mm	Rain	Light Rain
8:53 PM	7.8 ^°C	6.7 ^°C	93 ^%	1013.9 hPa	12.9 ^km	Calm		0.51 mm		Overcast
9:53 PM	7.2 ^°C	6.1 ^°C	93 ^%	1013.9 hPa	4.8 ^km	Calm		0 mm		Overcast
10:53 PM	7.2 ^°C	6.1 ^°C	93 ^%	1014.2 hPa	11.3 ^km	Calm		0.25 mm		Overcast
11:33 PM	7 ^°C	6 ^°C	93 ^%	1013.5 hPa	3.2 ^km	South (170°)	5.6 ^km/h	0 mm	Rain	Light Rain
11:46 PM	7 ^°C	6 ^°C	93 ^%	1013.5 hPa	3.2 ^km	South (180°)	5.6 ^km/h	0.25 mm		Overcast
11:53 PM	7.2 ^°C	6.1 ^°C	93 ^%	1014.2 hPa	3.2 ^km	South (180°)	5.6 ^km/h	0.25 mm		Overcast

Hourly data recorded from KSEA, located 0 kilometers away from Sea-Tac, Washington