5-day weather forecast San Francisco 27-04-2026

Weather forecast San Francisco tomorrow 27.04.2026: sunny, temperature from 9 °C to 14 °C.

Precipitation probability 85%. Wind up to 5.61 m/s (gusts 6.86 m/s). Air humidity 63–83%, atmospheric pressure 761–764 mm Hg, UV index up to 5.6.

Sunrise 06:18
Sunset 19:57

Waxing Gibbous79% illuminated
Moonrise 16:23 · Moonset 04:14

Chart

Table

← Sun, Apr 26

Mon, Apr 27, 2026

Tue, Apr 28 →

Forecast from 9 °C to 14 °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)	9	9	9	10	10	10	11	11	12	12	13	13	13	14	14	14	14	14	14	13	12	12	12	12
Precipitation (mm/hr)	0	0	0	0	0.02	0.01	0.01	0.01	0.02	0.01	0.02	0.01	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 (%)	1	3	4	1	82	73	73	54	61	55	59	58	41	25	26	17	15	11	12	9	1	19	8	13
Rain chance (%)	0	0	0	0	85	73	71	75	60	69	83	85	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)	4.19	4.19	4.11	3.89	3.69	3.61	3.39	3	3.11	3.11	3	3.31	3.89	4.5	5	5.31	5.5	5.61	5.5	4.69	3.69	3.5	3.81	3.5
Wind gust (m/s)	6.28	6.33	6.22	5.92	5.69	5.56	5.28	4.47	4.11	3.97	3.72	4	4.78	5.42	5.97	6.11	6.42	6.69	6.86	6.17	5.39	5.22	5.64	5.22
Wind direction (°)	W 276°	W 279°	WNW 284°	WNW 290°	WNW 292°	WNW 294°	WNW 296°	WNW 299°	WNW 297°	WNW 292°	WNW 283°	W 270°	W 262°	W 265°	W 272°	W 272°	W 271°	W 270°	W 272°	W 279°	W 280°	WNW 283°	WNW 286°	WNW 284°

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 (%)	81	80	80	81	80	80	80	78	73	71	69	67	68	67	65	63	63	64	68	72	76	79	82	83

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	762	762	762	762	763	763	763	764	764	764	764	764	763	763	764	764	764	764	764	764

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	0.1	0.5	1.3	2.7	4.1	4.6	5.6	5.6	5.1	3.6	2.2	0.9	0.2	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)	14	13.4	13.1	12.7	12.7	13	13.3	13.6	13.8	13.9	13.5	13.4	13.2	13.2	13.4	14	14.5	14.6	14.4	14.1	13.9	13.7	13.6	13.1
PM10 (µg/m³)	19.7	18.7	18.7	18.1	18.1	18.5	18.9	19.4	19.8	20	19.5	19.2	18.9	18.5	18.6	19	19.5	19.6	19.5	19.2	19.1	19	18.8	18.3
Ozone (O₃) (µg/m³)	77	76	79	85	90	94	98	101	103	104	104	102	98	93	86	78	72	69	68	67	67	67	67	67
NO₂ (µg/m³)	8.5	8.6	7.6	5.9	4.6	3.9	3.5	3.3	3.2	3.3	3.8	4.9	6.4	8.4	11.4	14.8	17.1	17.5	16.7	15.7	14.6	13.3	12.1	11.2
SO₂ (µg/m³)	2.5	2.7	2.8	3	3	2.9	2.8	2.7	2.6	2.5	2.5	2.6	2.7	2.9	3.1	3.2	3.3	3.1	2.8	2.6	2.6	2.6	2.7	2.8
CO (µg/m³)	136.9	139.9	140.9	139.9	138.9	137.9	136.9	135.9	136.9	137.9	139.9	143.9	148.9	151.9	150.9	147.9	144.9	141.9	139.9	137.9	135.9	134.9	135.9	139.9

← Sun, Apr 26

Mon, Apr 27, 2026

Tue, Apr 28 →

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.

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