Winter weather

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

Temperatures

Maximum Temperatures

Period	San Francisco	Hamburg
Dec 1	14.7°C	4.9°C
Dec 8	14.2°C	4.1°C
Dec 15	13.6°C	6.6°C
Dec 22	13.5°C	6.5°C
Jan 1	13.5°C	6.0°C
Jan 8	14.1°C	4.5°C
Jan 15	13.8°C	4.4°C
Jan 22	14.5°C	5.5°C
Feb 1	14.7°C	4.7°C
Feb 8	14.7°C	5.0°C
Feb 15	14.0°C	7.9°C
Feb 22	13.9°C	7.8°C
Average	5.7°C	14.1°C

Minimum Temperatures

Period	San Francisco	Hamburg
Dec 1	9.4°C	1.3°C
Dec 8	8.9°C	0.9°C
Dec 15	8.2°C	2.9°C
Dec 22	8.6°C	2.9°C
Jan 1	8.5°C	2.3°C
Jan 8	8.8°C	0.6°C
Jan 15	8.8°C	0.3°C
Jan 22	8.4°C	1.3°C
Feb 1	8.4°C	0.6°C
Feb 8	8.4°C	0.1°C
Feb 15	7.9°C	2.5°C
Feb 22	7.7°C	1.7°C
Average	1.5°C	8.5°C

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

Conditions

Sunny Weather

Period	San Francisco	Hamburg
Dec 1	4.0 hours/day	0.7 hours/day
Dec 8	4.2 hours/day	0.8 hours/day
Dec 15	4.2 hours/day	1.6 hours/day
Dec 22	3.4 hours/day	0.7 hours/day
Jan 1	3.8 hours/day	1.0 hours/day
Jan 8	4.9 hours/day	1.4 hours/day
Jan 15	3.7 hours/day	2.3 hours/day
Jan 22	5.3 hours/day	1.1 hours/day
Feb 1	5.3 hours/day	1.4 hours/day
Feb 8	5.8 hours/day	2.9 hours/day
Feb 15	5.9 hours/day	2.0 hours/day
Feb 22	6.2 hours/day	2.9 hours/day
Average	1.6 hours/day	4.7 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	San Francisco	Hamburg
Dec 1	3.3mm	2.5mm
Dec 8	4.8mm	2.3mm
Dec 15	2.6mm	2.1mm
Dec 22	4.7mm	3.3mm
Jan 1	3.1mm	4.2mm
Jan 8	3.9mm	2.4mm
Jan 15	2.7mm	1.6mm
Jan 22	2.5mm	2.0mm
Feb 1	5.7mm	2.3mm
Feb 8	4.3mm	2.1mm
Feb 15	2.8mm	3.0mm
Feb 22	1.3mm	2.1mm
Average	2.5mm	3.5mm

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

Wind Speed

Period	San Francisco	Hamburg
Dec 1	13.8km/h	17.7km/h
Dec 8	15.6km/h	17.5km/h
Dec 15	14.2km/h	19.2km/h
Dec 22	15.9km/h	21.8km/h
Jan 1	16.6km/h	23.0km/h
Jan 8	16.8km/h	19.9km/h
Jan 15	14.8km/h	19.6km/h
Jan 22	14.6km/h	21.3km/h
Feb 1	18.8km/h	21.1km/h
Feb 8	17.3km/h	19.8km/h
Feb 15	17.7km/h	22.0km/h
Feb 22	18.5km/h	20.1km/h
Average	20.3km/h	16.2km/h

Humidity

Period	San Francisco	Hamburg
Dec 1	72.7%	88.8%
Dec 8	69.6%	88.5%
Dec 15	71.7%	87.5%
Dec 22	74.9%	86.6%
Jan 1	75.9%	86.2%
Jan 8	74.9%	85.8%
Jan 15	73.6%	83.7%
Jan 22	71.8%	85.4%
Feb 1	69.2%	84.5%
Feb 8	70.4%	81.7%
Feb 15	70.8%	82.6%
Feb 22	69.6%	78.8%
Average	85.0%	72.1%

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Astronomy

Sunrise Time

Period	San Francisco	Hamburg
Dec 1	7:10	8:17
Dec 8	7:16	8:26
Dec 15	7:20	8:32
Dec 22	7:24	8:36
Jan 1	7:26	8:35
Jan 8	7:25	8:32
Jan 15	7:23	8:25
Jan 22	7:18	8:14
Feb 1	7:11	8:01
Feb 8	7:04	7:47
Feb 15	6:55	7:33
Feb 22	6:46	7:17
Average	8:12	7:12

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

Sunset Time

Period	San Francisco	Hamburg
Dec 1	16:50	16:02
Dec 8	16:51	16:00
Dec 15	16:53	16:01
Dec 22	16:58	16:05
Jan 1	17:04	16:14
Jan 8	17:11	16:24
Jan 15	17:18	16:35
Jan 22	17:28	16:52
Feb 1	17:37	17:08
Feb 8	17:45	17:22
Feb 15	17:52	17:36
Feb 22	17:59	17:50
Average	16:42	17:18

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

Useful Day Length

Period	San Francisco	Hamburg
Dec 1	9:41 hours	7:45 hours
Dec 8	9:35 hours	7:34 hours
Dec 15	9:33 hours	7:28 hours
Dec 22	9:34 hours	7:29 hours
Jan 1	9:38 hours	7:39 hours
Jan 8	9:46 hours	7:52 hours
Jan 15	9:55 hours	8:10 hours
Jan 22	10:10 hours	8:38 hours
Feb 1	10:26 hours	9:07 hours
Feb 8	10:41 hours	9:35 hours
Feb 15	10:52 hours	10:03 hours
Feb 22	10:59 hours	10:32 hours
Average	8:30 hours	10:06 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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