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)	2.5	2.5	2.31	2.5	2.19	2.19	2.11	2.11	2.81	2.81	3	3	3.61	4.19	5.39	5.19	4.61	4	4.5	4.81	4.11	4	4	3.61
Wind gust (m/s)	4.81	5	4.72	5.08	4.61	4.61	4.42	3.58	3.44	3.22	3.44	3.44	4.14	4.97	7	6.78	6.33	5.61	6.25	6.83	6.06	5.89	5.86	5.36
Wind direction (°)	SSW 210°	SSW 213°	SW 218°	SW 225°	SW 225°	SW 217°	SW 218°	SSW 213°	SSW 213°	SSW 207°	SSW 206°	SSW 194°	SSW 195°	SSW 203°	SSW 210°	SSW 207°	SSW 193°	S 180°	S 187°	S 188°	S 169°	SSE 158°	SSE 152°	SSE 159°

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	73	76	78	80	82	83	77	66	57	50	44	44	48	56	67	77	81	82	89	95	96	97	97

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)	766	766	765	765	765	764	764	764	764	764	764	763	762	762	762	762	761	761	761	760	760	760	759	759

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	1.1	2.5	4.4	6.2	6.6	4	1.3	0.7	0.4	0.2	0.1	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)	9.1	9	8.9	8.8	8.6	8.5	8.8	10	10.4	9.1	8.6	7.3	7.1	7.1	7	6.7	6.3	6.4	6.6	6.5	6.6	5.7	5.4	5.1
PM10 (µg/m³)	9.2	9.1	9	9	8.8	8.6	9	10.2	10.6	9.4	8.9	7.7	7.5	7.6	7.5	7.2	6.7	7.1	7.9	8.1	8.4	7.1	6.7	6.3
Ozone (O₃) (µg/m³)	44	42	40	37	35	34	34	36	44	64	90	110	117	118	117	115	112	106	97	86	78	74	72	73
NO₂ (µg/m³)	23.9	21.7	20	19.6	19.7	19.7	19.8	19.8	18.3	13.7	7.5	2.9	1.4	1.5	1.8	1.9	2.3	3.1	4.5	6.3	7.5	7.9	7.8	7.3
SO₂ (µg/m³)	1	1	0.9	0.9	1	1	1	1.1	1.1	1.1	1	1	1	0.9	0.9	0.9	0.9	0.9	0.8	0.8	0.7	0.7	0.7	0.7
CO (µg/m³)	152	148	145	143	142	147	166	192	205	193	168	148	138	133	131	134	140	144	144	142	150.8	159	165	171

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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 Boston 16-08-2026

Forecast from 15 °C to 27 °C and precipitation

Cloud cover and precipitation probability

Wind speed and direction