5-day weather forecast Reykjavík 21-06-2026

Weather forecast Reykjavík Sunday, June 21 21.06.2026: light rain shower, temperature from 7 °C to 12 °C.

Precipitation probability 7%. Wind up to 7.31 m/s (gusts 9.75 m/s). Air humidity 62–83%, atmospheric pressure 757–764 mm Hg.

Sunrise 02:55
Sunset 00:04

First Quarter48% illuminated
Moonrise 13:02 · Moonset 01:11

Chart

Table

← Sat, Jun 20

Sun, Jun 21, 2026

Mon, Jun 22 →

Forecast from 7 °C to 12 °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	8	7	7	8	8	9	9	10	10	11	11	11	11	12	12	11	11	11	11	10	10	9
Precipitation (mm/hr)	0	0	0	0	0	0	0	0	0	0	0	0.01	0.12	0.13	0.22	0.17	0.18	0.24	0.14	0.07	0.15	0.37	0.44	0.26

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 (%)	10	11	11	13	14	24	34	56	64	76	43	85	83	72	75	66	74	93	100	100	100	100	100	100
Rain chance (%)	7	8	8	8	9	9	9	10	10	12	7	14	22	21	26	23	26	35	32	28	34	48	54	44

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)	3.5	3	2.11	1.61	1.19	0.81	0.5	0.31	0.81	1.11	1.11	1.5	2	2.81	3.89	5.19	6.39	7.11	7.31	7.19	6.89	6.31	5.69	5.19
Wind gust (m/s)	4.86	4.17	2.94	2.28	1.72	1.11	0.67	0.39	1	1.36	1.39	1.86	2.5	3.44	4.72	6.36	8.08	9.22	9.75	9.42	9.11	8.42	7.5	7.03
Wind direction (°)	N 3°	N 4°	N 2°	N 355°	N 356°	N 1°	NNE 15°	ESE 110°	S 176°	SSW 193°	SSW 198°	S 188°	S 184°	S 181°	S 173°	SSE 168°	SSE 166°	SSE 162°	SSE 160°	SSE 160°	SSE 164°	S 179°	SSW 200°	SW 217°

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 (%)	72	74	75	75	75	74	71	68	65	63	62	63	66	68	68	70	71	74	75	76	77	80	83	83

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)	757	758	758	758	758	759	760	760	761	761	761	761	762	762	762	762	762	763	763	763	764	764	764	764

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	0	0	0	0	0	0	0	0	0	0	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)	2.1	2.2	2.3	2.3	2.4	2.5	2.5	2.5	2.4	2.7	2.6	2.4	2.1	2.3	2.2	2.1	2.4	2.3	2.5	2.4	2	1.6	2	2.6
PM10 (µg/m³)	4.6	4.7	4.7	4.7	4.8	5	5.1	4.7	4	4.3	3.9	3.2	3.7	4.2	3.8	4.2	4.5	4.7	4.5	4.2	4.1	3.9	4.3	5.1
Ozone (O₃) (µg/m³)	57	54	48	43	37	36	39	42	45	47	53	56	57	58	60	61	61	61	67	66	63	63	62.8	61.5
NO₂ (µg/m³)	2.6	3.5	4.9	8.4	8.8	7.9	8.8	8.2	4.9	2.8	2.5	2	1.8	1.6	1.3	1.2	1.1	1.1	1.1	1.2	1.5	1.4	1.6	1.6
SO₂ (µg/m³)	3	3.3	3.6	4.2	4.2	4	4	3.9	3.2	3.9	3.1	1.4	1.9	2.4	2.7	2.3	2.6	3.4	2.4	1.9	1.7	2.4	4.8	8.9
CO (µg/m³)	106	108	116	130	153	173	194	193	172	144	127	123	118	116	110	110	107	107	108	107	106	107	105.3	102.5

← Sat, Jun 20

Sun, Jun 21, 2026

Mon, Jun 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.

Learn more about our methodology →