5-day weather forecast Reykjavík 21-03-2026

Weather forecast Reykjavík Saturday 21 March 21.03.2026: blizzard, temperature from -2 °C to 2 °C.

Precipitation probability 100%. Wind up to 19.5 m/s (gusts 27.5 m/s). Air humidity 60–95%, atmospheric pressure 749–753 mm Hg, UV index up to 0.9.

Sunrise 07:41
Sunset 19:33

Chart

Table

Type of temperature:

°C

°F

← Fri, 20 Mar

Sat, 21 Mar, 2026

Sun, 22 Mar →

Forecast from -2 °C to 2 °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)	-1	-1	-2	-1	-1	-1	-1	-1	0	0	0	0	0	1	1	2	2	2	1	1	1	0	0	0
Precipitation (mm/hr)	0.41	0.47	0.44	0.4	0.46	0.43	0.32	0.43	0.29	0.27	0.25	0.26	0.24	0.24	0.2	0.24	0.19	0.15	0.18	0.18	0.06	0.26	0.31	0.23

Cloud cover

Cloud cover
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 (%)	91	91	95	86	92	83	82	89	85	92	98	90	100	95	89	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)	18.5	19.5	18.39	18.69	18.89	18.19	17.81	17.31	16.81	15.5	15.19	14.31	12.89	11.89	10.81	10.89	9.5	8	6	4.31	3.61	3.5	3.5	3.69
Wind gust (m/s)	27.5	23.06	23.56	25.28	26.86	27.06	27.28	21.28	21.17	20.11	20	19.83	17.22	14.33	13.14	13.61	12	10.53	7.78	5.78	5.08	4.67	4.72	5.03

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 (%)	69	69	68	66	68	66	64	64	63	64	65	63	66	63	64	60	63	66	69	71	75	88	94	95

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)	749	749	749	749	750	750	751	751	752	752	752	752	753	753	753	752	752	752	752	752	751	750	749	749

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	0	0.1	0.3	0.5	0.7	0.8	0.9	0.7	0.5	0.3	0.1	0	0	0	0	0

← Fri, 20 Mar

Sat, 21 Mar, 2026

Sun, 22 Mar →

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.

Learn more about our methodology →