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)	6.11	6	6	5.89	6	5.61	5.61	5.69	5.61	5.11	5	4.39	2.39	4.69	4.5	3.89	4.19	3.89	3.69	3.89	4.5	4.69	4.69	4.5
Wind gust (m/s)	12.69	12.5	12.61	12.5	12.5	12.03	12.31	12.39	12.42	11.61	11.11	9.61	5.11	8.81	9.81	9.14	9.44	9.31	8.92	8.5	9.31	10.42	10.61	10.61
Wind direction (°)	SSW 211°	SSW 211°	SSW 211°	SSW 211°	SSW 209°	SSW 209°	SSW 208°	SSW 210°	SW 217°	SW 216°	SW 218°	SW 228°	WNW 289°	N 5°	N 7°	N 359°	N 8°	N 10°	N 3°	N 357°	N 359°	N 359°	N 3°	N 4°

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 (%)	91	91	91	91	90	90	90	88	90	89	91	93	94	89	88	89	89	88	87	86	85	85	84	84

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)	763	763	763	763	763	763	762	762	762	762	763	763	764	764	764	765	765	766	767	767	767	768	769	770

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	0.1	0.2	0.2	0.1	0.1	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)	8.8	8.4	8.5	8.5	8.9	10.1	9.4	7.8	7.5	7.4	7.2	7.3	7.7	7.8	7.9	8.4	9.5	8.1	3.3	2.8	2.2	1.8	1.7	1.6
PM10 (µg/m³)	15.3	15	11.3	12.7	13.1	13.3	12.6	11.5	11.6	12.4	11.9	11.8	11.8	11.7	11.8	11.9	13.5	9.8	5	4	3.7	3.4	3	2.7
Ozone (O₃) (µg/m³)	65	68	66	67	68	68	69	68	68	67	64	64	64	63	61	60	60	54	49	49	53	55	56	59
NO₂ (µg/m³)	3.5	3.6	3.5	3.6	3.5	3.7	3.6	3.6	3.8	4.1	4.4	4.2	3.8	3.7	4	4.6	5.5	6.5	8.1	6.2	4.8	4.5	4	4
SO₂ (µg/m³)	0.5	0.5	0.5	0.5	0.6	0.7	0.8	1	1.4	1.9	1.6	1.6	1.4	1.2	1.3	1.2	0.9	0.9	0.8	0.7	0.6	0.5	0.5	0.4
CO (µg/m³)	167	165	167	167	167	168	166	166	171	172	171	171	171	168	166	169	170	188	190	179	173	171	169	169

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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 Helsinki Oct 17, 2026

Forecast from 7 °C to 12 °C and precipitation

Cloud cover and precipitation probability

Wind speed and direction