ROCKVILLE, MARYLAND

Home > North America > United States > Maryland
Elevation: 127 meters Latitude: 39 06N Longitude: 077 06W

WEATHER

Monthly - Summary

Hourly Data

SELECT A DAY

Number of Records: 200,544; Date Range: 10/17/07 - 3/22/16

PRINT THIS DATA

[ ← Previous Day ]
WEATHER ALMANAC - 21 DECEMBER, 2014

[ Next Day → ]

[ °F ] °C

Weather Element	Average	High	Low
Temperature	-0.2 ^°C	4 ^°C (2:55 pm)	-4 ^°C (11:55 pm)
Dewpoint	-6.1 ^°C	-5 ^°C (7:35 am)	-7 ^°C (10:35 am)
Humidity	65.1 ^%	80 ^% (11:55 pm)	49 ^% (2:55 pm)
Barometer	1027.4 ^hPa	1028.8 hPa (8:55 am)	1026.1 hPa (3:15 pm)
Wind Speed	2.1 ^km/h	11.1 ^km/h (12:35 pm)

Weather Element	Average
Visibility	16.1 ^km
Wind Direction	ENE (74.9 °)

Weather Element	Total
Precipitation	---
Heating Degree Days	18.3 (Base 18.3)

Averaged from 72 records on 21 December, 2014

WEATHER CONDITIONS BREAKOUT

WIND DIRECTION BREAKOUT

WEATHER BY HOUR - 21 DECEMBER, 2014

[ °F ] °C

Local Time	Temperature	Dewpoint	Humidity	Barometer	Visibility	Wind Direction	Wind Speed	Conditions
12:15 AM	-1 ^°C	-6 ^°C	69 ^%	1026.8 hPa	16.1 ^km	Calm		Overcast
12:35 AM	-1 ^°C	-6 ^°C	69 ^%	1026.8 hPa	16.1 ^km	Calm		Overcast
12:55 AM	-1 ^°C	-6 ^°C	69 ^%	1026.4 hPa	16.1 ^km	Calm		Overcast
1:15 AM	-1 ^°C	-6 ^°C	69 ^%	1026.8 hPa	16.1 ^km	Calm		Overcast
1:35 AM	-1 ^°C	-6 ^°C	69 ^%	1026.8 hPa	16.1 ^km	Calm		Overcast
1:55 AM	-1 ^°C	-6 ^°C	69 ^%	1027.1 hPa	16.1 ^km	Calm		Overcast
2:15 AM	-1 ^°C	-6 ^°C	69 ^%	1027.1 hPa	16.1 ^km	Calm		Overcast
2:35 AM	-1 ^°C	-6 ^°C	69 ^%	1027.1 hPa	16.1 ^km	Calm		Overcast
2:55 AM	-1 ^°C	-6 ^°C	69 ^%	1027.1 hPa	16.1 ^km	Calm		Overcast
3:15 AM	-1 ^°C	-6 ^°C	69 ^%	1027.1 hPa	16.1 ^km	Calm		Overcast
3:35 AM	-1 ^°C	-6 ^°C	69 ^%	1026.8 hPa	16.1 ^km	NNE (30°)	5.6 ^km/h	Overcast
3:55 AM	-1 ^°C	-6 ^°C	69 ^%	1026.8 hPa	16.1 ^km	Calm		Overcast
4:15 AM	-1 ^°C	-6 ^°C	69 ^%	1026.8 hPa	16.1 ^km	Calm		Overcast
4:35 AM	-1 ^°C	-6 ^°C	69 ^%	1026.8 hPa	16.1 ^km	Calm		Overcast
4:55 AM	-1 ^°C	-6 ^°C	69 ^%	1027.1 hPa	16.1 ^km	North (360°)	5.6 ^km/h	Overcast
5:15 AM	-1 ^°C	-6 ^°C	69 ^%	1027.1 hPa	16.1 ^km	Calm		Overcast
5:35 AM	-1 ^°C	-6 ^°C	69 ^%	1027.1 hPa	16.1 ^km	Calm		Overcast
5:55 AM	-1 ^°C	-6 ^°C	69 ^%	1027.4 hPa	16.1 ^km	Calm		Overcast
6:15 AM	-1 ^°C	-6 ^°C	69 ^%	1027.8 hPa	16.1 ^km	Calm		Overcast
6:35 AM	-1 ^°C	-6 ^°C	69 ^%	1027.8 hPa	16.1 ^km	Calm		Overcast
6:55 AM	-1 ^°C	-6 ^°C	69 ^%	1027.8 hPa	16.1 ^km	Calm		Overcast
7:15 AM	-1 ^°C	-6 ^°C	69 ^%	1028.1 hPa	16.1 ^km	NE (40°)	5.6 ^km/h	Overcast
7:35 AM	-1 ^°C	-5 ^°C	75 ^%	1028.1 hPa	16.1 ^km	Calm		Overcast
7:55 AM	-1 ^°C	-6 ^°C	69 ^%	1028.1 hPa	16.1 ^km	Calm		Overcast
8:15 AM	-1 ^°C	-6 ^°C	69 ^%	1028.1 hPa	16.1 ^km	Calm		Overcast
8:35 AM	-1 ^°C	-6 ^°C	69 ^%	1028.4 hPa	16.1 ^km	Calm		Overcast
8:55 AM	-1 ^°C	-6 ^°C	69 ^%	1028.8 hPa	16.1 ^km	Calm		Overcast
9:15 AM	-1 ^°C	-6 ^°C	69 ^%	1028.8 hPa	16.1 ^km	Calm		Overcast
9:35 AM	0 ^°C	-6 ^°C	64 ^%	1028.8 hPa	16.1 ^km	Calm		Overcast
9:55 AM	0 ^°C	-6 ^°C	64 ^%	1028.8 hPa	16.1 ^km	Calm		Overcast
10:15 AM	1 ^°C	-6 ^°C	60 ^%	1028.8 hPa	16.1 ^km	Calm		Overcast
10:35 AM	1 ^°C	-7 ^°C	56 ^%	1028.8 hPa	16.1 ^km	Calm		Overcast
10:55 AM	1 ^°C	-6 ^°C	60 ^%	1028.8 hPa	16.1 ^km	North (350°)	5.6 ^km/h	Overcast
11:15 AM	1 ^°C	-6 ^°C	60 ^%	1028.4 hPa	16.1 ^km	NW (320°)	5.6 ^km/h	Overcast
11:35 AM	2 ^°C	-6 ^°C	56 ^%	1028.4 hPa	16.1 ^km	Calm		Overcast
11:55 AM	2 ^°C	-6 ^°C	56 ^%	1028.1 hPa	16.1 ^km	WNW (300°)	7.4 ^km/h	Overcast
12:15 PM	2 ^°C	-6 ^°C	56 ^%	1028.1 hPa	16.1 ^km	NW (320°)	7.4 ^km/h	Overcast
12:35 PM	3 ^°C	-5 ^°C	56 ^%	1027.8 hPa	16.1 ^km	WNW (300°)	11.1 ^km/h	Overcast
12:55 PM	3 ^°C	-6 ^°C	52 ^%	1027.4 hPa	16.1 ^km	North (360°)	9.3 ^km/h	Overcast
1:15 PM	3 ^°C	-6 ^°C	52 ^%	1027.1 hPa	16.1 ^km	WNW (290°)	11.1 ^km/h	Overcast
1:35 PM	3 ^°C	-6 ^°C	52 ^%	1027.1 hPa	16.1 ^km	Calm		Mostly Cloudy
1:55 PM	3 ^°C	-5 ^°C	56 ^%	1026.8 hPa	16.1 ^km	NW (310°)	7.4 ^km/h	Partly Cloudy
2:15 PM	3 ^°C	-6 ^°C	52 ^%	1026.4 hPa	16.1 ^km	NNW (330°)	7.4 ^km/h	Clear
2:35 PM	3 ^°C	-6 ^°C	52 ^%	1026.4 hPa	16.1 ^km	WSW (240°)	5.6 ^km/h	Clear
2:55 PM	4 ^°C	-6 ^°C	49 ^%	1026.4 hPa	16.1 ^km	NNW (340°)	7.4 ^km/h	Clear
3:15 PM	3 ^°C	-6 ^°C	52 ^%	1026.1 hPa	16.1 ^km	NW (310°)	7.4 ^km/h	Clear
3:35 PM	3 ^°C	-6 ^°C	52 ^%	1026.1 hPa	16.1 ^km	NNW (340°)	5.6 ^km/h	Clear
3:55 PM	3 ^°C	-6 ^°C	52 ^%	1026.1 hPa	16.1 ^km	WNW (300°)	7.4 ^km/h	Clear
4:15 PM	3 ^°C	-6 ^°C	52 ^%	1026.4 hPa	16.1 ^km	NW (310°)	5.6 ^km/h	Clear
4:35 PM	2 ^°C	-6 ^°C	56 ^%	1026.8 hPa	16.1 ^km	Calm		Clear
4:55 PM	2 ^°C	-6 ^°C	56 ^%	1027.4 hPa	16.1 ^km	Calm		Clear
5:15 PM	1 ^°C	-6 ^°C	60 ^%	1027.1 hPa	16.1 ^km	Calm		Clear
5:35 PM	1 ^°C	-7 ^°C	56 ^%	1027.1 hPa	16.1 ^km	Calm		Clear
5:55 PM	0 ^°C	-7 ^°C	60 ^%	1027.1 hPa	16.1 ^km	Calm		Clear
6:15 PM	-2 ^°C	-7 ^°C	69 ^%	1027.8 hPa	16.1 ^km	Calm		Clear
6:35 PM	-2 ^°C	-6 ^°C	74 ^%	1028.1 hPa	16.1 ^km	Calm		Clear
6:55 PM	-2 ^°C	-6 ^°C	74 ^%	1027.4 hPa	16.1 ^km	Calm		Clear
7:15 PM	-2 ^°C	-6 ^°C	74 ^%	1027.4 hPa	16.1 ^km	Calm		Clear
7:35 PM	-2 ^°C	-6 ^°C	74 ^%	1027.8 hPa	16.1 ^km	Calm		Clear
7:55 PM	-1 ^°C	-6 ^°C	69 ^%	1027.8 hPa	16.1 ^km	Calm		Clear
8:15 PM	-1 ^°C	-6 ^°C	69 ^%	1027.8 hPa	16.1 ^km	Calm		Clear
8:35 PM	-2 ^°C	-6 ^°C	74 ^%	1027.8 hPa	16.1 ^km	NE (50°)	5.6 ^km/h	Clear
8:55 PM	-1 ^°C	-6 ^°C	69 ^%	1027.8 hPa	16.1 ^km	NE (40°)	5.6 ^km/h	Clear
9:15 PM	-2 ^°C	-6 ^°C	74 ^%	1027.8 hPa	16.1 ^km	ENE (70°)	5.6 ^km/h	Clear
9:35 PM	-2 ^°C	-6 ^°C	74 ^%	1028.1 hPa	16.1 ^km	East (80°)	5.6 ^km/h	Clear
9:55 PM	-2 ^°C	-7 ^°C	69 ^%	1028.1 hPa	16.1 ^km	Calm		Clear
10:15 PM	-2 ^°C	-7 ^°C	69 ^%	1028.1 hPa	16.1 ^km	Calm		Clear
10:35 PM	-2 ^°C	-7 ^°C	69 ^%	1028.1 hPa	16.1 ^km	Calm		Clear
10:55 PM	-3 ^°C	-7 ^°C	74 ^%	1028.1 hPa	16.1 ^km	Calm		Clear
11:15 PM	-3 ^°C	-7 ^°C	74 ^%	1028.1 hPa	16.1 ^km	Calm		Clear
11:35 PM	-3 ^°C	-7 ^°C	74 ^%	1027.8 hPa	16.1 ^km	Calm		Clear
11:55 PM	-4 ^°C	-7 ^°C	80 ^%	1027.8 hPa	16.1 ^km	Calm		Clear

Hourly data recorded from KGAI, located 0 kilometers away from Rockville, Maryland