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)	2.89	3.69	4	3.69	3	3.19	3.31	3.11	3.69	4.11	4.69	5.11	5.81	5.81	4.89	4.31	3.89	4	4.11	4.69	5.69	6.69	6.81	6.5
Wind gust (m/s)	4.64	5.69	6.17	5.64	4.67	5.33	5.58	4.78	5.22	5.58	6.28	6.86	7.97	8	6.86	6.19	5.61	5.83	6.08	6.83	8.31	9.72	9.94	9.53
Wind direction (°)	ESE 118°	ESE 107°	ESE 109°	ESE 117°	E 99°	E 82°	E 86°	ESE 109°	E 97°	ESE 103°	E 90°	E 91°	E 84°	E 87°	E 93°	E 97°	E 88°	E 80°	E 83°	E 80°	ENE 78°	E 80°	ENE 74°	ENE 74°

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 (%)	84	85	85	85	85	85	83	81	77	73	70	68	67	68	69	73	76	78	79	79	79	81	82	81

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	760	759	759	758	758	758	758	758	757	756	756	755	755	755	755	755	755	754	754

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	0.4	0.9	1.6	2.2	2.7	2.9	2.7	2.4	1.6	0.9	0.5	0.3	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)	3.9	4.2	3.9	3.3	3.1	2.6	2.6	2.9	3	2.9	2.8	3.1	2.8	2.7	2.6	2.4	2.3	2.3	2.5	2.2	2.1	2.5	2.1	1.9
PM10 (µg/m³)	4.9	5.5	5.2	4.7	4	4	3.9	3.9	4.2	4.4	4.1	3.9	3.7	3.5	3.2	3	3.1	3.3	3.6	3.4	3.1	3.6	3.3	2.9
Ozone (O₃) (µg/m³)	45	46	46	48	49	48	48	48	48	48	48	49	50	51	51	49	49	55	58	57	59	61	58.8	52
NO₂ (µg/m³)	4.6	3.5	3.4	3.3	3	2.7	2.5	2.7	3.2	2.7	2.1	1.9	2	2	2.3	2.5	2.3	2.5	2.6	1.7	1.4	1.2	1.4	1.9
SO₂ (µg/m³)	16.4	14.1	11.3	10.4	9.5	9.2	7.6	8.1	10.5	5.8	4.3	3.5	3.2	3.1	3.2	4.1	4.2	4	3	2.6	2.3	2.4	7.1	17.2
CO (µg/m³)	139	146	152	150	148	147	144	144	144	141	140	137	137	135	135	135	133	135	137	136	138	142	126.5	114.5

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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 Reykjavík 17-08-2026

Forecast from 10 °C to 13 °C and precipitation

Cloud cover and precipitation probability

Wind speed and direction