Yearly weather

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

Weather Score #

Heat Seeker Score is a composite score designed for those who crave hot, sunny weather with minimal rainfall. It prioritizes high temperatures and abundant sunshine.

Perfect for sun worshippers, beach lovers, and those seeking warm, dry climates for outdoor activities and relaxation.

Formula optimized for hot weather enthusiasts who prefer temperatures above 25°C (77°F) with maximum sun exposure and minimal precipitation.

Key factors in the calculation:

High temperatures: Favors locations with warm to hot daily highs
Abundant sunshine: Rewards areas with maximum daylight hours
Low precipitation: Penalizes frequent rain and wet conditions
Warm nights: Considers comfortable evening temperatures

Temperatures #

San Francisco enjoys mild temperatures year-round, with all months falling within a comfortable range
The warmest months are August and September, with average highs around 22.3°C
The coolest months are December, January and February, with average lows around 8.0°C-8.7°C, still well above discomfort levels
There are no discomfort temperatures in San Francisco.

Maximum Temperatures

Minimum Temperatures

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

Conditions #

San Francisco experiences a distinct seasonal variation in sun hours and precipitation levels, with the driest and sunniest months occurring from May to September.
Notably, June has the highest sun hours at 11.5h and minimal precipitation (only 0.05mm), while December records the lowest sun hours (2.5h) and the highest precipitation (6.34mm), indicating a significant shift in weather patterns from summer to winter.

Sunny Weather

Period	San Francisco
Jan	4.5 hours/day
Feb	5.8 hours/day
Mar	5.6 hours/day
Apr	8.3 hours/day
May	10.5 hours/day
Jun	12.3 hours/day
Jul	12.3 hours/day
Aug	11.3 hours/day
Sep	10.0 hours/day
Oct	8.0 hours/day
Nov	6.4 hours/day
Dec	3.9 hours/day
Average	8.2 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

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

Wind Speed

Humidity

Daylight Hours #

In San Francisco, the earliest sunrise occurs in June at 5:48 AM, while the latest sunrise is recorded in January at 7:22 AM.
Conversely, the city's latest sunset happens also in June at 8:32 PM, and the earliest sunset is in December at 4:53 PM, which highlights the significant seasonal variation in daylight hours.
The shortest day of the year is in December, with just 9 hours and 35 minutes of daylight, whereas the longest day in June boasts a duration of 14 hours and 43 minutes, indicating a wide range in day length correlating with the changing seasons.

Sunrise Time

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

Sunset Time

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

Useful Day Length

Period	San Francisco
Jan	9:54 hours
Feb	10:49 hours
Mar	11:57 hours
Apr	12:46 hours
May	13:13 hours
Jun	13:32 hours
Jul	13:29 hours
Aug	13:00 hours
Sep	12:16 hours
Oct	11:11 hours
Nov	10:07 hours
Dec	9:35 hours
Average	11:48 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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