5-day weather forecast Helsinki 21-06-2026

Weather forecast Helsinki Sunday, June 21 21.06.2026: sunny, temperature from 14 °C to 21 °C.

Precipitation probability 13%. Wind up to 6.11 m/s (gusts 11.22 m/s). Air humidity 51–99%, atmospheric pressure 761–764 mm Hg, UV index up to 5.7.

Sunrise 03:54
Sunset 22:50

First Quarter48% illuminated
Moonrise 12:42 · Moonset 00:59

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Table

← Sat, Jun 20

Sun, Jun 21, 2026

Mon, Jun 22 →

Forecast from 14 °C to 21 °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)	17	17	16	16	15	15	15	15	15	15	15	16	17	19	20	20	21	21	21	20	20	18	16	14
Precipitation (mm/hr)	0	0	0	2.41	0.63	0.01	0	0.68	0.39	0.78	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 (%)	37	43	48	76	74	72	47	100	100	100	100	100	75	10	21	6	4	7	3	0	0	0	0	0
Rain chance (%)	13	15	16	75	62	27	21	70	61	73	35	34	26	10	7	5	3	3	2	2	2	3	3	5

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)	5.31	5	5.39	5.61	5.11	4.19	4.61	5.11	4.61	5.69	5	4.61	4.89	5.19	5.5	6.11	6.11	5.5	5.39	5.19	5.19	5.19	4.5	3.69
Wind gust (m/s)	11	10.17	11.22	11.22	9.72	8.22	8.75	8.72	7.67	9.28	8.11	7.33	7.44	7.5	8.39	9.64	9.92	9.19	9.39	9.67	9.75	10.06	9.14	7.78
Wind direction (°)	SW 215°	SSW 202°	SSW 204°	SSW 211°	SW 216°	SSW 206°	SSW 212°	SW 225°	SW 220°	SW 228°	SW 224°	WSW 238°	WSW 239°	WSW 242°	SW 235°	SW 232°	WSW 241°	WSW 258°	WNW 283°	WNW 297°	NW 314°	NW 317°	NW 317°	NW 314°

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 (%)	81	83	84	87	95	95	94	96	98	99	99	98	94	80	70	65	59	56	54	53	51	55	60	68

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)	764	763	762	762	762	762	762	762	762	762	761	762	762	762	762	762	762	762	762	763	763	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	0.1	0.1	0.5	1.2	2.2	4	5	5.7	5.6	5.2	4.2	3	1.9	1.1	0.5	0.2	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)	4.6	4.5	5.2	5.8	6.6	7.4	7.5	7.3	7.3	7.6	7.9	7.9	8.1	7.3	7.7	7.1	6.6	6	5.9	5.2	3.8	2.5	1.6	1.5
PM10 (µg/m³)	6.1	6.2	7	7.6	8.5	9	9.1	9.4	8.9	10.4	10	10.4	10.1	9.7	9.6	8.9	8.5	7.9	7.6	6.8	5.2	3	2.2	2
Ozone (O₃) (µg/m³)	58	57	61	66	68	70	70	70	74	83	83	83	84	89	96	99	96	92	85	79	74	66	60	57
NO₂ (µg/m³)	10.6	7.7	6.7	6.4	6.4	6.4	6.4	5.9	5.6	5.2	4.5	5.7	6.8	6.9	6.3	4.4	3.2	3.1	2.8	3.2	3.2	3.3	3.3	3.4
SO₂ (µg/m³)	0.3	0.3	0.4	0.4	0.5	0.7	0.6	0.5	0.5	0.6	0.5	0.4	0.3	0.3	0.3	0.3	0.2	0.2	0.3	0.4	0.4	0.4	0.5	0.4
CO (µg/m³)	110	111	110	110	110	113	114	114	124	128	132	134	137	137	137	140	138	136	128	122	116	109	110	108

← Sat, Jun 20

Sun, Jun 21, 2026

Mon, Jun 22 →

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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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