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)	2.81	3	2.5	2.89	2.89	2.31	3.19	2.81	2.31	2.5	2.5	2.11	3.39	4.19	3.89	5.11	5.39	5.11	5.69	5.31	4.19	4.11	3.61	2.81
Wind gust (m/s)	3.5	3.81	4.06	3.83	3.69	4.08	4.33	3.83	4.25	3.33	2.92	4.36	6.39	7.19	6.19	5.31	6.11	8	6.5	6.5	6.75	5.5	5.19	5.06
Wind direction (°)	WSW 238°	SW 235°	SSW 211°	SW 222°	SW 224°	SW 220°	SW 235°	WSW 238°	WSW 247°	SW 235°	SW 234°	WSW 256°	WSW 246°	WSW 250°	W 260°	W 267°	W 280°	WNW 282°	WNW 293°	WNW 302°	WNW 297°	WNW 298°	WNW 294°	WNW 296°

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 (%)	73	74	80	73	74	82	74	74	82	70	68	65	64	63	59	59	60	61	68	71	68	71	70	70

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	759	759	759	759	760	760	760	761	761	761	761	761	760	760	760	760	760	761	760	761	761	761

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	0	0.3	1.1	2.1	3.1	3.5	3.3	2.4	1.4	0.5	0	0	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)	12.6	12.2	11.9	11.5	11.3	10.9	10.7	10.6	10.8	10.3	8	7.3	7	7	7.1	7.1	6.9	6.7	6.6	6.4	6.5	6.6	6.9	6.9
PM10 (µg/m³)	16.8	16.7	16.5	16.1	15.8	15.5	15.2	14.9	14.9	14.2	12.1	11.3	11	11.1	11.2	11.4	11.2	10.9	10.8	10.5	10.5	10.7	11	11
Ozone (O₃) (µg/m³)	57	60	62	63	64	64	64	63	65	70	77	83	87	89	91	91	90	89	88	87	86	84	82	80
NO₂ (µg/m³)	18.1	16.3	14.9	14.2	13.9	13.8	14.1	14.6	14	11.1	7.2	4.1	2.8	2.4	2.3	2.4	2.9	3.4	4	4.6	5.2	5.8	6.4	6.6
SO₂ (µg/m³)	1.5	1.2	1	0.9	0.8	0.8	0.8	0.9	0.9	0.9	0.8	0.8	0.7	0.7	0.6	0.6	0.6	0.6	0.6	0.7	0.7	0.7	0.7	0.7
CO (µg/m³)	131	129	129	129	130	134	146	161	169	163	150	139	132	126	122	122	124	126	129	132	134	134	133	130

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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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5-day weather forecast San Francisco Oct 30, 2026

Forecast from 14 °C to 17 °C and precipitation

Cloud cover and precipitation probability

Wind speed and direction