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)	6.61	6.39	6.31	6.5	5.89	5.69	5.89	5.11	4.69	4.61	4.11	3.39	2.89	2.5	2.5	2.69	2.89	3	3	3	2.69	2.11	1.39	1.19
Wind gust (m/s)	7.31	6.81	6.53	11.5	6.25	5.92	10.89	5.31	5.03	7.61	7.11	3.42	7.89	2.5	2.61	2.92	3.11	3.22	3.19	3.11	2.83	2.22	1.53	1.31
Wind direction (°)	SW 222°	SW 226°	SW 231°	SW 229°	SW 227°	SW 227°	SW 221°	SW 219°	SW 216°	SSW 210°	SSW 211°	SSW 213°	SW 219°	SW 228°	SW 234°	SW 232°	SW 228°	SW 218°	SSW 210°	SSW 205°	SSW 202°	SSW 197°	S 189°	SSW 193°

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 (%)	53	54	52	55	55	55	56	56	56	57	58	57	56	56	56	55	54	54	53	52	52	51	50	50

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)	765	765	765	765	765	766	766	767	767	768	768	768	768	768	767	767	767	767	767	768	769	769	769	769

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	1.1	3	5.6	8.1	9.9	10.5	9.6	7.3	4.5	2.1	0.6	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)	9.4	9.6	10.4	11.5	13	14.5	15.5	16.2	12.3	12.6	13.4	14.4	15	14.8	14.1	13.4	12.6	12.1	12	12.1	12.1	12.4	12.9	10.9
PM10 (µg/m³)	12.1	12	12.9	14.3	16.1	17.8	18.8	19.2	16.6	17.5	18.3	19.6	20.7	20.9	20.2	19.3	18.5	17.8	17.8	17.8	17.9	18.1	18.6	14.6
Ozone (O₃) (µg/m³)	24	18	14	10	9	10	17	27	37	44	50	57	68	80	89	92	90	87	82	75	66	55	41	31
NO₂ (µg/m³)	27.6	30.7	33.5	36.9	39.9	40	34.8	26.6	19.7	16.1	13.9	11.6	8.6	5.5	3.3	2.3	2.2	3	4.6	7.1	10.6	15.9	22.3	27.7
SO₂ (µg/m³)	1	0.9	0.8	0.8	0.8	0.9	1	1.1	1.2	1.4	1.5	1.6	1.4	1.1	0.9	0.8	0.6	0.6	0.6	0.7	0.8	0.9	1	1
CO (µg/m³)	111	108	107	110	115	119	122	125	125	120	113	107	104	103	102	102	103	105	107	110	113	117	120	122

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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 Diego 18-08-2026

Forecast from 13 °C to 14 °C and precipitation

Cloud cover and precipitation probability

Wind speed and direction