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)	3.39	3.19	3	2.69	2.61	2.31	2.39	2.31	2.39	2.69	2.69	3.11	3.19	3.89	4.39	4.61	4.89	4.69	4.5	4.31	4	3.81	3.61	3.69
Wind gust (m/s)	5.53	5.17	4.89	4.39	4.33	3.86	4.11	3.86	3.67	3.75	3.67	4.19	4.5	5.67	6.39	6.81	7.44	7.28	6.72	6.58	6.47	6.17	5.89	6.08
Wind direction (°)	WSW 251°	WSW 246°	WSW 244°	WSW 240°	WSW 238°	WSW 237°	SW 235°	SW 230°	SW 226°	SW 226°	SW 236°	WSW 244°	WSW 248°	WSW 253°	WSW 256°	WSW 256°	WSW 251°	WSW 250°	WSW 248°	WSW 244°	WSW 242°	WSW 237°	SW 230°	SW 228°

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 (%)	87	87	88	88	88	88	88	87	82	76	72	69	66	64	64	64	66	67	69	73	78	79	79	79

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	760	760	760	760	760	760	761	760	761	760	760	760	759	759	758	758	758	758	758	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	0.8	2.1	4.1	6.4	8.2	9.2	8.8	7.3	5.1	2.8	1.2	0.3	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)	13.6	13.4	13.2	12.5	11.9	10.9	10.6	10.3	10.5	10.5	10.5	10.6	11	11.1	11.2	11.3	11.6	12.1	12.3	12.6	13.2	13.8	13.4	13.9
PM10 (µg/m³)	20.1	19.7	19.5	18.6	17.7	16.1	15.5	15	15.3	15.4	15.4	15.5	16	16.1	16.1	16.2	16.6	17.5	17.8	18.2	19.2	20.2	19.4	20.3
Ozone (O₃) (µg/m³)	54	56	57	57	57	57	56	55	55	56	57	58	59	61	61	60	59	57	55	53	52	51	51	51
NO₂ (µg/m³)	7	6.2	5.7	5.4	5.3	5.2	5.2	5.3	5.3	5.2	5.1	5	4.9	4.8	4.8	5	5.3	6	7.4	9.3	10.7	11.4	11.6	11.6
SO₂ (µg/m³)	0.8	0.8	0.7	0.7	0.8	0.8	0.8	0.8	0.8	0.9	0.9	1	1	1.1	1.1	1.1	1	1	1	0.9	0.9	0.9	0.8	0.8
CO (µg/m³)	88	87	86	85	85	85	86	88	90	90	90	90	89	89	88	88	88	89	90	92	93	94	94	94

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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 08-08-2026

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Wind speed and direction