5-day weather forecast Reykjavík 20-04-2026

Weather forecast Reykjavík Monday, April 20 20.04.2026: partly cloudy, temperature from 7 °C to 10 °C.

Precipitation probability 76%. Wind up to 11.11 m/s (gusts 18.31 m/s). Air humidity 63–86%, atmospheric pressure 768–779 mm Hg, UV index up to 2.7.

Sunrise 05:39
Sunset 21:17

Waxing Crescent9% illuminated
Moonrise 00:00 · Moonset 00:00

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Table

← Sun, Apr 19

Mon, Apr 20, 2026

Tue, Apr 21 →

Forecast from 7 °C to 10 °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)	8	8	7	7	7	7	7	7	8	8	9	9	9	9	10	9	9	9	9	8	8	7	7	7
Precipitation (mm/hr)	0	0	0	0	0	0	0	0	0	0	0	0.01	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 (%)	54	66	39	25	24	34	40	22	22	78	85	58	33	24	33	47	36	14	13	35	88	41	67	32
Rain chance (%)	0	0	0	0	0	0	0	0	0	0	0	76	0	0	0	0	0	0	0	0	0	0	0	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)	11.11	10.61	9.81	8.89	8.39	8.31	8.39	8.39	8.11	7.69	8.19	9.11	9.11	8.89	8.81	8.61	8.11	7.11	6.69	6.31	5.5	5	4.5	4.39
Wind gust (m/s)	18.31	17.83	16.61	15.58	15.08	14.83	15.08	14.86	13.75	12.53	13.03	13.75	13.64	13.86	13.53	13.28	12.72	11.67	11.33	10.44	9.39	8.72	7.94	7.89
Wind direction (°)	SE 126°	SE 129°	SE 131°	SE 132°	SE 130°	SE 127°	SE 127°	SE 128°	SE 130°	SE 133°	SE 135°	SE 142°	SE 144°	SE 144°	SSE 148°	SSE 147°	SE 145°	SSE 147°	SSE 147°	SE 144°	SE 144°	SE 144°	SE 139°	SE 134°

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 (%)	80	79	80	79	79	79	78	77	75	73	70	70	67	63	63	66	64	65	69	75	80	83	85	86

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)	768	769	769	770	770	770	771	772	773	773	773	774	775	776	776	776	776	776	777	777	778	779	779	779

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	0.6	1.1	1.6	2.1	2.6	2.7	2.4	1.9	1.3	0.7	0.4	0.1	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)	4.1	4.2	4.2	4.1	4.3	4.3	4.3	4.4	4.4	4.3	4.2	4.1	4.1	4.1	4	4.1	4.1	4	4	3.9	4.1	4.5	6.9	9
PM10 (µg/m³)	9.4	9.8	9.7	9.4	9.5	9.7	9.9	9.9	10	10.1	10.1	10.2	10.1	9.6	9.2	8.8	7.8	7.4	7.3	7	7.4	8	11.1	13.7
Ozone (O₃) (µg/m³)	86	86	85	86	85	85	84	83	83	83	84	84	83	83	85	84	84	84	84	81	80	80	76.2	73
NO₂ (µg/m³)	2.1	2.1	2.2	2.2	2.2	2.4	2.5	2.6	3	3	2.9	2.8	2.7	2.6	2.5	2.5	2.7	2.9	3	3.3	3.4	3.7	3.9	3.9
SO₂ (µg/m³)	4.3	3.9	4.7	5.1	5.3	5	4.7	4.6	4.5	4.1	3.5	3.2	3	2.7	2.1	1.8	1.7	1.7	1.7	1.6	2	2.6	3.3	4.3
CO (µg/m³)	160.9	163.9	161.9	161.9	163.9	163.9	164.9	166.9	167.9	166.9	164.9	163.9	163.9	164.9	162.9	161.9	161.9	162.9	163.9	165.9	168.9	170.9	169.7	167.9

← Sun, Apr 19

Mon, Apr 20, 2026

Tue, Apr 21 →

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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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