5-day weather forecast San Francisco 20-05-2026

Weather forecast San Francisco Wednesday, May 20 20.05.2026: sunny, temperature from 13 °C to 20 °C.

No precipitation expected. Wind up to 4.31 m/s (gusts 7.67 m/s). Air humidity 49–83%, atmospheric pressure 758–761 mm Hg, UV index up to 8.4.

Sunrise 05:56
Sunset 20:17

Waxing Crescent15% illuminated
Moonrise 09:40 · Moonset 00:06

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← Tue, May 19

Wed, May 20, 2026

Thu, May 21 →

Forecast from 13 °C to 20 °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)	13	13	13	13	13	13	13	14	15	17	18	19	20	20	20	20	19	18	16	16	14	14	14	13
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	0	0	0	0	0	0	0	32	60	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)	2.5	2.31	2.11	1.69	1.81	1.69	1.69	1	0.39	0.31	0.61	1.19	2	2.69	4	4.19	4.31	4.19	4.11	3.69	3	2.89	2.5	2
Wind gust (m/s)	4.56	4.11	3.75	3.08	3.42	3.33	3.36	1.75	0.61	0.44	0.92	1.92	3.53	4.97	7.28	7.53	7.67	7.58	6.19	5.75	5.78	4.75	4.08	4.08
Wind direction (°)	SW 232°	SW 235°	SW 228°	SW 216°	SSW 202°	SSW 209°	SSW 196°	SSW 198°	S 180°	S 189°	WSW 238°	WSW 257°	W 263°	W 260°	WSW 258°	W 262°	W 261°	W 260°	WSW 250°	WSW 250°	W 261°	WSW 243°	WSW 244°	WSW 248°

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 (%)	80	81	82	83	83	82	81	76	69	62	56	52	51	50	49	51	54	55	67	72	67	80	82	72

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)	761	761	761	761	761	761	761	761	761	761	761	761	761	761	761	760	760	760	758	758	760	759	759	760

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	2.2	4.1	6	7.5	8.4	8.2	6.8	4.8	2.9	1.3	0.4	0	0	0	0

← Tue, May 19

Wed, May 20, 2026

Thu, May 21 →

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 →