5-day weather forecast Hong Kong 18-05-2026

Weather forecast Hong Kong Monday, May 18 18.05.2026: light rain shower, temperature from 24 °C to 25 °C.

Precipitation probability 100%. Wind up to 7.61 m/s (gusts 11.03 m/s). Air humidity 86–94%, atmospheric pressure 756–758 mm Hg, UV index up to 3.6.

Sunrise 05:43
Sunset 18:57

Waxing Crescent2% illuminated
Moonrise 06:35 · Moonset 20:51

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Table

← Sun, May 17

Mon, May 18, 2026

Tue, May 19 →

Forecast from 24 °C to 25 °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)	25	25	24	24	25	25	25	25	25	24	24	24	24	24	24	25	25	25	25	25	25	25	25	25
Precipitation (mm/hr)	0.15	0.22	0.5	0.71	0.4	0.24	0.61	0.78	1.01	1.75	1.7	1.2	0.93	0.62	0.33	0.24	0.17	0.16	0.14	0.12	0.1	0.18	0.19	0.1

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 (%)	68	91	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	98	88	84	91	92	90
Rain chance (%)	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100

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)	6.11	6.69	7.11	7	7.19	7.39	7	6	6.31	6.69	7.19	7.19	7.11	7	7.19	7.5	7.61	7.39	7	6.5	6.11	5.81	5.81	5.89
Wind gust (m/s)	8.56	9.25	9.69	9.44	9.78	10.06	9.58	8.72	9.56	9.03	9.61	10	10.22	10.39	11.03	9.92	9.89	9.75	9.39	8.94	8.42	8.11	8.06	8.19
Wind direction (°)	E 86°	E 88°	E 91°	E 94°	E 93°	E 94°	ESE 109°	ESE 117°	ESE 109°	E 98°	E 90°	E 92°	E 93°	E 90°	E 90°	E 94°	E 95°	E 96°	E 100°	E 100°	E 98°	E 94°	E 93°	E 94°

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 (%)	88	89	92	92	91	90	91	91	92	94	94	93	91	90	89	88	86	86	87	88	88	88	89	90

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)	758	758	757	757	756	757	757	758	758	758	758	758	758	758	758	757	757	757	757	757	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	0.1	0.3	0.7	1	1.4	2.2	3.4	3.6	2.4	1.3	0.4	0.1	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)	11.2	11.9	11.3	11.3	11.2	11	10.6	10.4	9.9	9.7	9.7	9.4	9.1	9.4	10	12.2	12.4	13.5	14.4	13.2	13.7	14.1	14.5	14.1
PM10 (µg/m³)	13.4	13.9	12.9	12.9	13	13	12.7	12.7	12.3	12.5	12.8	12.7	12.3	12.7	13.3	15.7	16.7	17.8	19.7	18.2	18.9	19.5	20.1	19.4
Ozone (O₃) (µg/m³)	59	54	51	48	47	48	51	54	57	59	61	61	60	59	56	53	52	54	58	61	62	62	61	58
NO₂ (µg/m³)	26.7	29.9	31.6	32.4	32.2	30.3	27.3	24.5	22.3	20.2	18.8	18.1	17.9	18.4	20	22.1	23.3	22.4	20.6	19.5	19.7	20.6	22.3	24.6
SO₂ (µg/m³)	20.3	19.6	19.2	19	18.6	17.8	16.8	16	15.5	15.2	15	14.9	15.1	15.6	16.8	18.5	19.8	20.4	20.7	21.1	21.9	22.9	24	25.2
CO (µg/m³)	204.9	206.9	201.9	192.9	183.9	175.9	168.9	161.9	154.9	147.9	142.9	139.9	138.9	143.9	161.9	186.9	202.9	203.9	195.9	189.9	186.9	183.9	184.9	190.9

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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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