5-day weather forecast London 18-04-2026

Weather forecast London tomorrow 18.04.2026: sunny, temperature from 9 °C to 15 °C.

Precipitation probability 89%. Wind up to 5 m/s (gusts 6.11 m/s). Air humidity 45–86%, atmospheric pressure 765–770 mm Hg, UV index up to 4.3.

Sunrise 05:59
Sunset 20:02

Waxing Crescent1% illuminated
Moonrise 05:54 · Moonset 22:09

Chart

Table

← Fri, Apr 17

Sat, Apr 18, 2026

Sun, Apr 19 →

Forecast from 9 °C to 15 °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)	12	12	11	11	10	10	9	9	10	12	11	11	11	11	12	14	15	14	13	12	11	11	10	10
Precipitation (mm/hr)	0.03	0.01	0	0	0	0	0	0	0	0	0	0.01	0	0	0	0	0	0	0	0	0.01	0.12	0.08	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 (%)	100	100	100	100	38	7	5	10	7	4	52	85	84	87	75	40	42	62	42	2	54	85	79	12
Rain chance (%)	89	66	0	0	0	0	0	0	0	0	0	62	0	0	0	0	0	0	0	0	75	100	100	0

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)	3.39	3.11	2.5	2.5	2.61	2.61	2.69	3	3.11	3.31	4.11	4.31	4.19	4	3.89	3.61	4.69	4.89	5	3.69	2.39	2.61	2.81	3.19
Wind gust (m/s)	4.75	4.28	3.5	3.53	3.67	3.72	3.92	4.06	3.89	3.81	4.72	4.94	4.83	4.61	4.5	4.14	5.42	5.64	6.11	4.89	3.61	3.97	4.22	4.69
Wind direction (°)	SW 225°	WSW 242°	WSW 240°	WSW 247°	W 264°	WSW 257°	W 264°	W 264°	W 274°	W 277°	W 279°	WNW 283°	WNW 285°	WNW 282°	W 280°	WNW 286°	NW 314°	NW 314°	NW 319°	NW 321°	NW 321°	NW 317°	NNW 328°	NNW 337°

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 (%)	82	85	86	85	83	83	83	82	73	64	67	67	66	63	58	47	45	47	51	55	61	70	73	73

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	766	766	766	766	766	766	767	767	767	767	767	767	768	768	767	767	767	768	768	769	769	769	770

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	0.6	1.3	2.3	3.3	4	4.3	4.1	3.3	2.2	1	0.5	0.2	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)	10.2	10.2	10.4	10.3	10.6	10.7	10	8.2	7.6	7.9	7.1	6.7	6.5	5.6	4.7	4.4	4.2	4.3	4.2	4.2	4.3	4.5	4.4	5.4
PM10 (µg/m³)	13.6	14.4	14.8	15.2	15.4	13.9	11.7	12	13.6	12.7	11	10.2	10	10.2	9.4	8.3	7.3	6.9	6.8	7.4	7.4	7.9	8.6	8.6
Ozone (O₃) (µg/m³)	69	67	66	67	66	63	55	57	57	52	60	67	75	80	86	94	95	95	94	90	83	74	63	53
NO₂ (µg/m³)	21.1	18.8	17.6	17.3	16.4	14.9	14.3	16.4	16.9	14.6	12.1	10.4	8.8	8	7.1	6.1	5.7	6.4	6.4	8.4	10.1	11.9	21.2	23.8
SO₂ (µg/m³)	2.9	2.4	2.3	2	1.9	2.1	1.9	2.2	2.2	2.3	2.1	1.9	1.8	1.8	1.6	1.6	1.6	1.5	1.4	1.7	1.7	1.8	2.5	2.7
CO (µg/m³)	161.9	157.9	155.9	154.9	152.9	152.9	155.9	157.9	164.9	177.9	170.9	167.9	166.9	163.9	159.9	160.9	156.9	156.9	157.9	167.9	170.9	167.9	176.9	177.9

← Fri, Apr 17

Sat, Apr 18, 2026

Sun, Apr 19 →

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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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