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)	3.81	3.61	3.19	2.89	2.81	3.61	4.39	4.89	5.5	6.19	6.39	6.69	6.89	7.31	7.31	7.61	7.89	7.81	7.5	7	6.61	6.39	5.89	5.81
Wind gust (m/s)	7.61	7.11	6.44	5.81	4.86	6.11	7.11	7.33	7.44	8	7.89	8.11	8.19	8.69	8.75	9.08	9.53	9.5	9.53	9.22	9.28	9.72	9.5	9.56
Wind direction (°)	WNW 282°	W 280°	W 275°	W 261°	SW 230°	SW 227°	SW 225°	SW 220°	SW 217°	SW 217°	SW 217°	SW 221°	SW 228°	SW 228°	SW 229°	SW 229°	SW 231°	SW 234°	SW 235°	SW 233°	SW 234°	SW 234°	SW 233°	SW 228°

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 (%)	71	72	73	75	74	80	82	80	75	71	69	67	66	66	66	64	64	64	66	72	77	81	82	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)	761	761	761	761	761	761	761	761	761	761	761	761	761	761	761	761	761	761	761	761	761	761	761	761

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	0.3	0.7	1.3	2.2	3.1	4	4.4	4.2	3.4	2.7	1.9	1.1	0.5	0.2	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)	2.4	2.4	2.1	1.9	2.4	2.3	2.5	3.2	3.4	3.1	3	2.9	3.4	4	4.4	4.6	4.9	5.1	5.3	5.5	5.5	5.4	5.1	4.8
PM10 (µg/m³)	3	2.9	3.1	3.1	3.2	3.1	4	4.9	4.8	5	4.5	4.5	5.1	6.2	7.4	7.6	8.3	8.8	8.9	9.3	8.9	8.5	8.4	7.9
Ozone (O₃) (µg/m³)	55	54	52	51	54	55	61	65	67	65	64	66	75	83	88	94	95	97	98	97	96	94	92	90
NO₂ (µg/m³)	4.4	4.5	5	5.2	4.5	5.2	5.6	4	4.2	3.9	3.4	3	2.4	1.4	1.3	1.4	1.4	1.6	1.8	2	2.2	2.7	2.8	2.9
SO₂ (µg/m³)	0.3	0.3	0.3	0.2	0.3	0.3	0.3	0.2	0.3	0.3	0.3	0.2	0.2	0.2	0.2	0.2	0.2	0.2	0.2	0.2	0.3	0.3	0.3	0.2
CO (µg/m³)	135	132	128	126	123	121	119	124	135	135	135	136	132	132	134	131	131	132	133	131	130	129	130	129

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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 09-08-2026

Forecast from 12 °C to 20 °C and precipitation

Cloud cover and precipitation probability

Wind speed and direction