5-day weather forecast San Francisco 18-07-2026

Weather forecast San Francisco tomorrow 18.07.2026: sunny, temperature from 13 °C to 18 °C.

Precipitation probability 24%. Wind up to 6.19 m/s (gusts 7.39 m/s). Air humidity 68–89%, atmospheric pressure 761–762 mm Hg, UV index up to 9.9.

Sunrise 06:02
Sunset 20:29

Waxing Crescent23% illuminated
Moonrise 10:51 · Moonset 23:09

Chart

Table

← Fri, Jul 17

Sat, Jul 18, 2026

Sun, Jul 19 →

Forecast from 13 °C to 18 °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)	14	13	13	14	14	13	13	14	14	15	16	17	17	18	18	17	17	17	16	15	14	14	14	14
Precipitation (mm/hr)	0	0	0	0	0.01	0.01	0.02	0.01	0.01	0.01	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 (%)	30	34	33	31	71	80	71	83	82	75	0	0	0	0	0	0	0	0	0	2	18	39	42	40
Rain chance (%)	15	15	15	15	21	24	22	24	22	18	7	6	5	5	5	5	6	6	7	9	12	17	17	17

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	4.31	4.11	3.81	3.81	3.61	3.39	3.31	3.5	3.69	3.5	3.89	4.39	4.89	5.31	5.89	6.19	6.19	5.89	5.61	5.19	4.81	4.39	4.11
Wind gust (m/s)	5.78	5.92	5.58	5.22	5.25	5.03	4.78	4.47	4.47	4.39	4.03	4.5	5.06	5.64	6.11	6.78	7.25	7.39	7.39	7.39	7.19	6.86	6.14	5.61
Wind direction (°)	WSW 249°	WSW 250°	WSW 250°	WSW 247°	WSW 244°	WSW 241°	SW 233°	SW 225°	SW 227°	SW 232°	SW 236°	WSW 241°	WSW 246°	WSW 251°	WSW 254°	WSW 257°	WSW 258°	W 259°	W 260°	W 262°	W 265°	W 266°	W 263°	WSW 258°

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	86	86	86	86	86	85	82	77	73	70	68	68	68	69	70	72	74	78	84	89	89	88

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	762	762	762	762	762	762	762	762	762	761	761	761	761	761	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	0.2	0.9	2.3	4.4	6.7	8.8	9.9	9.6	8	5.7	3.3	1.5	0.5	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)	12.7	12.7	12.6	12	11.3	10.6	9.7	9.1	8.3	7.7	7.3	7.3	7.7	8.1	8.4	8.9	9.7	10.5	11.2	11.6	11.5	11.1	10.4	9.8
PM10 (µg/m³)	19.5	19.4	19.3	18.3	17.2	16	14.6	13.8	12.6	11.7	11	11	11.5	12.1	12.5	13.2	14.5	15.8	16.6	17.2	16.9	16.2	15.1	14.2
Ozone (O₃) (µg/m³)	61	62	62	61	60	59	59	58	58	57	57	56	55	53	52	51	51	51	51	52	52	52	53	54
NO₂ (µg/m³)	4.9	4.7	4.5	4.5	4.6	4.5	4.2	3.8	3.5	3.4	3.4	3.5	3.6	3.7	3.9	4.2	4.7	5.4	6.7	8.4	9.5	9.9	9.9	9.3
SO₂ (µg/m³)	0.9	0.9	0.9	0.9	0.9	0.9	0.9	0.8	0.8	0.9	0.9	1	1	1	1	1	0.9	0.9	0.9	0.9	0.9	0.9	0.9	0.9
CO (µg/m³)	94	92	90	89	87	87	88	90	92	93	93	93	92	91	91	91	92	93	93	94	94	94	94	93