How hot does it get in San Francisco in the summer
Emma Miller
Updated on April 13, 2026
The good news: San Francisco has a very mild climate. It rarely gets out of the 55 to 65 degree range (12 to 18°C), summer or winter. There’s no bad news! Just a reminder to visitors that it’s often cool and windy, especially in the afternoon.
How hot does SF get in the summer?
In San Francisco, the summers are long, comfortable, arid, and mostly clear and the winters are short, cold, wet, and partly cloudy. Over the course of the year, the temperature typically varies from 45°F to 72°F and is rarely below 39°F or above 83°F.
Why is San Francisco so cool in the summer?
To the east, heat in the valley creates thinner air and low pressure. The valley becomes like a vacuum that wants to be filled by the heavier marine layer. It pulls that layer over San Francisco, which typically makes the city cooler than other parts of California — and the country — in the summer.
Whats the hottest it gets in San Francisco?
The hottest it’s ever been in SF was 103 degrees which occurred on June 14, 2000 and July 17, 1988.Is San Francisco humid in July?
The relative humidity in San Francisco during July usually peaks at 86 percent in the morning then drops to 56 percent by early afternoon.
Why is San Francisco colder than LA?
Yes, it’s cooler than LA because it’s in the north part, as you go further south it’s more hotter. Also San Francisco is surrounded by water in three sides, so it also may cause to stay cooler. Originally Answered: Which city is bigger San Francisco or Los Angeles?
Does San Francisco get really hot?
The good news: San Francisco has a very mild climate. It rarely gets out of the 55 to 65 degree range (12 to 18°C), summer or winter. There’s no bad news! Just a reminder to visitors that it’s often cool and windy, especially in the afternoon.
When was the last time it was 100 degrees in San Francisco?
“The last time San Francisco hit 100 degrees was September 2, 2017 (102) — a day after its all-time record high of 106 on September 1, 2017,” the NWS shared on Twitter.Why is San Francisco so cold?
Why is San Francisco cold all the time? The city is actually a peninsula, surrounded on three sides by cool water where the Pacific Ocean on the west meets the bay on the east. When warm air mixes with this cool water, it creates fog. This is what we like to refer to as our ‘natural air-conditioning’!
Where is the hottest place on earth?Death Valley, California, USA The aptly named Furnace Creek currently holds the record for hottest air temperature ever recorded. The desert valley reached highs of 56.7C in the summer of 1913, which would apparently push the limits of human survival.
Article first time published onWhy is San Francisco so dirty?
The reason tourists, such as myself, find San Francisco so dirty is because of the tourist attractions, also known as Mission Street and Union Square, overlapped with the Tenderloin. The Tenderloin is an area in San Francisco that is the most densely populated with homeless people and is known for being dirty.
Why is San Francisco colder than Seattle?
San Francisco has a warm-summer Mediterranean climate with wet, mild winters and warm, dry summers. San Francisco gets about 25” of rain per year and no snow. In Seattle, winters are cool and wet while summers are fairly dry. It’s rare to experience extreme cold or heat in Seattle thanks to the Puget Sound.
Why is San Francisco Bay water so cold?
The ocean temperatures off the coast of Northern California are cooler than Alaska’s. … Frigid waters and endless fog are all cyclical phenomena for the Bay Area, and they have to do with something called upwelling, which is when extremely cold water from deep in the ocean rises to the top.
What is the most humid city in the US?
Most Humid Cities in the United States New Orleans has the highest relative humidity among big US cities, with an average of nearly 86 percent. The Louisiana city is followed closely by second-ranked Jacksonville, Florida.
Is July the coldest month in San Francisco?
MonthLowHighJul54.4°F68.2°FAug55.6°F69.2°FSept56.1°F71.3°FOct54.6°F70.4°F
Is San Francisco dry or humid?
San Francisco’s air is typically damp and sticky with an average humidity of 75 percent as moisture sweeps in from the Pacific Ocean. We don’t feel the humidity as much as we might in other high-humidity locations such as Florida because Northern California coastal temperatures are mild.
Did it ever snow in San Francisco?
Since 1900, there have been only two official reports of accumulating snow in downtown San Francisco: Dec. 11, 1932 (0.8”) and Jan. 15, 1952 (0.3”). However, photographic and anecdotal evidence shows that measurable snow fell at low elevations in the city on Feb.
Why is Northern California so cold?
Coastal upwelling is the process by which the strong and persistent northwesterly winds bring deep and cold water to the surface at the coast. … Coastal upwelling occurs mostly in spring and summer, causing windy, foggy and cold conditions, especially in the Northern-Central California coast where winds are strongest.
What is summer like in San Francisco?
Summer in San Francisco is sometimes gloomy, foggy, and chilly. Those warm-looking, sunny beaches you see on film are far south of San Francisco.
Why is San Francisco so small?
The population is under a million, so its not a huge city. However it has a small town feel to it in that it’s not very metropolitan, most everyone knows the same places and the degrees of separation between individuals are low.
Is San Francisco safe to walk at night?
Walking in San Francisco at night can be safe, but we really wouldn’t recommend it. If you’re on a night out, stick with a big group of people and don’t wander off alone. Avoid the sketchy neighborhoods completely at night.
Is San Francisco safer than Los Angeles?
LA generally has around 500. So LA has more crime, but SF has more crime per population. So splitting hairs, LA is safer. Go national however, and both cities are Disneyland compared to Elkhart, Indiana, Kansas, MO and San Bernardino….
Is San Francisco a good place to live?
San Francisco is a great area for meeting new people, as half of San Francisco’s population is single. The environment isn’t nearly as conducive to families, however. The high cost of living has made it difficult for families with children to settle down in San Francisco.
What's San Francisco known for?
A popular tourist destination, San Francisco is known for its cool summers, fog, steep rolling hills, eclectic mix of architecture, and landmarks, including the Golden Gate Bridge, cable cars, the former Alcatraz Federal Penitentiary, Fisherman’s Wharf, and its Chinatown district.
Why is Los Angeles warmer than San Francisco?
Los Angeles has a climate more like the desert, which it would be, were it not for all the imported water. The climate in San Francisco is similar to the coast of Chile and the southeast coast of Australia, both substantial wine grape regions. The bay area has a Mediterranean climate.
What is the coldest temperature in San Francisco?
These temperature extremes were measured in downtown San Francisco and go back to 1921. The lowest temperature recorded there during that period was 27 degrees Fahrenheit (-3 Celsius) on December 11, 1932.
What is the lowest temperature ever recorded in San Francisco?
Back on Dec. 11, 1932, the city hit a bone-chilling 27 degrees, marking the coldest day in S.F. history with records going back to 1875. It actually snowed in the city that day.
What is the hottest temperature ever recorded?
Record Value56.7°C (134°F)Length of Record1911-presentInstrumentationRegulation Weather Bureau thermometer shelter using maximum thermometer graduated to 135°FGeospatial LocationFurnace Creek Ranch, CA, USA [formerly Greenland Ranch], [36°27’N, 116°51’W, elevation: -54.6m (-179ft)]
How hot can a human survive?
The maximum body temperature a human can survive is 108.14°F. At higher temperatures the body turns into scrambled eggs: proteins are denatured and the brain gets damaged irreparably. Cold water draws out body heat. In a 39.2°F cold lake a human can survive a maximum of 30 minutes.
Does anyone live in Death Valley?
More than 300 people live year-round in Death Valley, one of the hottest places on Earth. Here’s what it’s like. With average daytime temperatures of nearly 120 degrees in August, Death Valley is one of the hottest regions in the world.
How hot does it get in Death Valley?
Death Valley is famous as the hottest place on earth and driest place in North America. The world record highest air temperature of 134°F (57°C) was recorded at Furnace Creek on July 10, 1913. Summer temperatures often top 120°F (49°C) in the shade with overnight lows dipping into the 90s°F (mid-30s°C.)