Weather

San Francisco weather

Live rain radar, current conditions, an hour-by-hour outlook and a seven-day forecast for San Francisco, with original writing about the city's climate from The Daily San Francisco.

Very high UV (8). Sun protection from mid-morning.

Today's briefing

**San Francisco Weather** It's a crisp 12 degrees out there this morning (feeling more like 11), but you'll want to stick around for a beautiful day ahead, with temperatures climbing to 25 degrees and zero chance of rain. The UV index is sitting at a very high 8, so sunscreen is non-negotiable if you're heading outside. Throw on layers this morning and plan to shed them by afternoon as the sun warms things up nicely. The weekend looks pleasant but cooler, with both Saturday and Sunday maxing out around 19 degrees and minimal rain expected.

22°

Clear · feels like 22°

Today: 23° / 11°
Humidity: 48%
Wind: 21 km/h W
UV index: 8 · Very high
Sunrise: 5:50 am
Sunset: 8:35 pm
Updated: 2:00 pm

Next 24 hours

Now
22°
0%
3pm
22°
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4pm
22°
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5pm
21°
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6pm
21°
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7pm
20°
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8pm
19°
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9pm
17°
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10pm
16°
1%
11pm
15°
0%
12am
14°
0%
1am
14°
1%
2am
13°
1%
3am
13°
2%
4am
13°
2%
5am
13°
2%
6am
13°
2%
7am
14°
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8am
15°
1%
9am
16°
1%
10am
18°
1%
11am
19°
1%
12pm
21°
1%
1pm
21°
2%

Live rain radar

Drag to pan, scroll the page over it

Animated rain radar via RainViewer (Bureau of Meteorology sources). Full BOM radar loop.

Seven-day forecast

Sun
Mainly clear
23° 11°
Rain 1%
Mon
Mainly clear
21° 13°
Rain 2%
Tue
Overcast
23° 12°
Rain 0%
Wed
Overcast
18° 14°
Rain 0%
Thu
Overcast
23° 14°
Rain 1%
Fri
Partly cloudy
22° 14°
Rain 1%
Sat
Overcast
21° 13°
Rain 2%

Air quality

Good

US AQI

PM2.5: 9
PM10: 13
Ozone: 62

Air quality by Open-Meteo (CAMS), in µg/m³.

Sun and moon

Sunrise: 5:50 am
Sunset: 8:35 pm
Daylight: 14h 45m

Full moon

100% lit

From the weather desk

San Francisco weather, explained

How to read the San Francisco forecast

A good forecast is really three views at once. The current panel tells you what it feels like outside right now, which is what matters before you head out the door. The hourly strip is for planning the next part of your day: when the rain band arrives, when the wind picks up, when it is warm enough to walk. The seven-day outlook is for the week ahead, and it is most reliable in the first three or four days. Read it from the top down and you will almost always have what you need for San Francisco.

What the UV index actually means

The UV index rates the strength of the sun's ultraviolet radiation on a simple scale. Below 3 is low and you can be outside safely without protection. From 3 to 7 is moderate to high, the point at which sunburn becomes likely within an hour, so a hat and sunscreen earn their keep. Above 8 is very high to extreme, and skin can burn in minutes around the middle of the day. The index peaks at solar noon, not at the hottest part of the afternoon, so the safest habit is to check the number rather than judge by the temperature.

Why the overnight low matters as much as the high

Daytime maximums get the headlines, but the overnight minimum shapes how the day actually feels. A cold night means a slow, crisp start and, on clear evenings, the chance of fog or frost before dawn. A mild night means the warmth carries over and the morning is comfortable from the outset. Clear skies let heat escape and push the low down; cloud cover traps it and keeps the night warmer. That is why two days with the same maximum can feel completely different depending on the night that came before.

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Weather data by Open-Meteo. The Daily San Francisco is independent and not affiliated with any government weather agency.

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