5-day weather forecast Reykjavík 21-04-2026

Weather forecast Reykjavík Tuesday, April 21 21.04.2026: sunny, temperature from 5 °C to 9 °C.

No precipitation expected. Wind up to 3.5 m/s (gusts 6.72 m/s). Air humidity 76–92%, atmospheric pressure 775–779 mm Hg, UV index up to 2.7.

Sunrise 05:35
Sunset 21:20

Waxing Crescent17% illuminated
Moonrise 00:00 · Moonset 00:00

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Table

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Tue, Apr 21, 2026

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Forecast from 5 °C to 9 °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)	6	5	5	6	5	5	5	6	6	7	8	8	8	9	9	8	8	7	7	7	7	7	6	6
Precipitation (mm/hr)	0	0	0	0	0	0	0	0	0	0	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 (%)	12	2	2	11	13	16	17	16	12	5	5	10	13	8	6	100	100	100	10	7	100	14	9	10
Rain chance (%)	0	0	0	0	0	0	0	0	0	0	0	0	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)	1.5	1.19	1.11	3.5	3.11	3.11	3.11	2.81	2.61	2.5	2.19	1.61	1.11	0.69	1	1.39	1.31	1	0.61	0.31	0.89	0.5	0.69	1.31
Wind gust (m/s)	3.14	2.53	2.31	6.72	5.89	5.81	5.72	4.94	4.14	3.75	3.25	2.39	1.67	1.03	1.47	2.08	1.97	1.56	0.94	0.5	1.53	0.83	1.22	2.28
Wind direction (°)	NNW 345°	N 353°	N 356°	SE 124°	ESE 122°	SE 124°	SE 126°	SE 124°	ESE 120°	ESE 122°	SE 135°	SSE 150°	SSE 165°	SSW 202°	SW 226°	WNW 284°	W 279°	W 273°	W 278°	SSW 201°	SSE 162°	SW 234°	S 182°	SSE 156°

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 (%)	85	85	86	91	92	91	91	91	88	85	81	79	78	76	76	81	82	82	83	83	84	88	90	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)	778	777	777	779	779	779	779	779	779	779	779	779	779	779	779	776	776	775	775	775	775	779	779	778

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	0.8	1.3	1.9	2.4	2.7	2.7	2.4	1.9	1.3	0.8	0.4	0.1	0	0	0

← Mon, Apr 20

Tue, Apr 21, 2026

Wed, Apr 22 →

Reykjavík on the map

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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