5-day weather forecast San Francisco 17-05-2026

Weather forecast San Francisco today 17.05.2026: sunny, temperature from 10 °C to 25 °C.

No precipitation expected. Wind up to 6.61 m/s (gusts 13.86 m/s). Air humidity 17–74%, atmospheric pressure 756–760 mm Hg, UV index up to 8.6.

Sunrise 05:58
Sunset 20:14

Waxing Crescent0% illuminated
Moonrise 06:15 · Moonset 22:02

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Table

Sun, May 17, 2026

Mon, May 18 →

Forecast from 10 °C to 25 °C and precipitation

Temperature & Precipitation
Time	00:00	01:00	02:00	03:00	04:00	05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00
Temperature (°C)	12	11	11	11	10	10	10	12	14	15	17	19	20	21	21	23	25	25	25	22	21	19	18	18
Precipitation (mm/hr)	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0

Cloud cover and precipitation probability

Cloud cover & Rain chance
Time	00:00	01:00	02:00	03:00	04:00	05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00
Cloud cover (%)	0	0	0	0	0	0	0	0	0	0	0	0	0	0	25	0	0	0	0	0	0	0	0	0
Rain chance (%)	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0

Wind speed and direction

Wind & Wind gust
Time	00:00	01:00	02:00	03:00	04:00	05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00
Wind (m/s)	4	3.61	1.89	1.69	1.19	0.89	1.31	1	1	1.31	1.61	1.61	3.5	5.5	5.31	5.61	5	6.5	5.81	6.19	6.19	6.11	6.19	6.61
Wind gust (m/s)	6.17	5.5	2.97	2.67	1.89	1.42	2.06	1.47	1.33	1.64	1.94	1.97	4.44	7.31	7.56	8.5	8.44	11.47	11.44	12.81	13.03	12.81	13.03	13.86
Wind direction (°)	WNW 298°	WNW 303°	WNW 295°	WNW 284°	WNW 301°	W 274°	W 280°	W 274°	W 262°	WSW 258°	WNW 293°	NW 306°	WNW 288°	WNW 287°	WNW 291°	WNW 302°	NW 318°	NW 321°	NW 320°	NW 318°	NNW 335°	NNW 344°	N 350°	NNW 348°

Air humidity

Humidity
Time	00:00	01:00	02:00	03:00	04:00	05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00
Humidity (%)	65	66	69	69	64	67	71	74	66	58	58	48	46	43	45	42	35	17	18	20	22	26	27	27

Atmospheric pressure

Pressure
Time	00:00	01:00	02:00	03:00	04:00	05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00
Pressure (mm Hg)	759	759	760	760	760	759	759	759	760	759	759	759	759	759	758	758	757	757	756	756	756	757	758	758

Ultraviolet index

UV Index
Time	00:00	01:00	02:00	03:00	04:00	05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00
UV Index	0	0	0	0	0	0	0	0.2	0.9	1.9	3.5	5.4	7.7	8.6	8.3	6.9	4.9	2.9	1.3	0.4	0	0	0	0

Air quality & pollen

Air quality
Time	00:00	01:00	02:00	03:00	04:00	05:00	06:00	07:00	08:00	09:00	10:00	11:00	12:00	13:00	14:00	15:00	16:00	17:00	18:00	19:00	20:00	21:00	22:00	23:00
PM2.5 (µg/m³)	6.6	6.5	6.6	6.7	6.9	6.9	6.8	7.1	6.9	6.3	5.7	6.3	6.9	7.2	7.3	7	6.4	5.5	4.6	3.9	3.3	2.9	2.7	2.8
PM10 (µg/m³)	9.2	9.4	9.5	9.5	9.8	9.9	9.9	10.5	10.2	9.4	8.4	9.2	10.1	10.3	10.4	9.7	8.6	6.9	5.5	4.5	3.7	3.1	3	3.1
Ozone (O₃) (µg/m³)	64	66	68	71	74	77	80	83	86	90	91	89	85	82	80	79	78	79	81	82	82	80	79	77
NO₂ (µg/m³)	5.7	4.9	4.5	4.4	4.2	3.8	3.4	3.1	3	3	3.5	4.7	6.3	7.5	8	8.1	8	7.7	7.3	6.8	6.2	5.5	5.2	5.4
SO₂ (µg/m³)	1.4	1.4	1.4	1.5	1.5	1.5	1.4	1.4	1.4	1.4	1.4	1.4	1.4	1.5	1.6	1.8	2	2.1	2.3	2.3	2.1	1.9	1.7	1.6
CO (µg/m³)	133.9	132.9	132.9	132.9	132.9	131.9	129.9	128.9	128.9	128.9	129.9	129.9	130.9	132.9	136.9	142.9	145.9	143.9	139.9	135.9	133.9	132.9	131.9	132.9

Sun, May 17, 2026

Mon, May 18 →

Frequently asked questions about the weather in San Francisco

Today in San Francisco the temperature ranges from 10 °C to 25 °C, wind up to 6.61 m/s. Check the detailed hourly forecast above for more information.

The precipitation probability in San Francisco today is 0%. View the full multi-day forecast above to see the rain chances for each upcoming day.

The wind speed in San Francisco today reaches up to 6.61 m/s with gusts up to 13.86 m/s. Check the detailed wind chart above for hourly wind data.

The air humidity in San Francisco today ranges from 17% to 74%. View the humidity chart above for hourly details.

The UV index in San Francisco today reaches up to 8.6. Check the UV index chart above for hourly values throughout the day.

The atmospheric pressure in San Francisco today ranges from 756 to 760 mm Hg. View the pressure chart above for hourly readings.

Cloud cover in San Francisco today reaches up to 25%. Check the cloud cover chart above for hourly details throughout the day.

San Francisco on the map

Data Sources & Methodology

Our weather forecasts are powered by a professional weather data provider that aggregates data from national weather services, satellite observations, radar networks, and over 80,000 weather stations worldwide. Forecast data is updated multiple times daily. We convert raw data into clear summaries — wind speed in m/s, pressure in mmHg — so you can plan your day with confidence.

Learn more about our methodology →