5-day weather forecast Boston 18-04-2026

Weather forecast Boston Saturday, April 18 18.04.2026: partly cloudy, temperature from 8 °C to 13 °C.

Precipitation probability 63%. Wind up to 4.69 m/s (gusts 5.58 m/s). Air humidity 66–96%, atmospheric pressure 764–767 mm Hg, UV index up to 4.

Sunrise 05:59
Sunset 19:30

Waxing Crescent1% illuminated
Moonrise 06:12 · Moonset 21:32

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Table

← Fri, Apr 17

Sat, Apr 18, 2026

Forecast from 8 °C to 13 °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)	9	9	9	8	8	8	8	8	9	10	12	13	13	13	13	13	12	11	10	9	8	8	8	8
Precipitation (mm/hr)	0	0	0	0	0.01	0	0	0	0	0	0	0	0	0	0	0	0.01	0.01	0.01	0.01	0	0.01	0	0.01

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 (%)	60	26	40	48	59	73	90	97	82	45	49	57	66	64	57	66	64	88	83	72	58	59	65	67
Rain chance (%)	0	0	0	0	63	0	0	0	0	0	0	0	0	0	0	0	84	80	89	61	0	88	0	69

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)	2.11	2	2.19	2.11	2.19	2.11	2.31	2.31	2.19	2.69	3.19	3.39	3.81	4	4.69	4.31	4.39	4.31	4.11	3.39	4.31	3.31	3.31	2.81
Wind gust (m/s)	3.72	3.64	3.92	3.67	3.83	3.58	3.83	3.47	2.97	3.31	3.67	3.92	4.36	4.61	5.42	4.94	5.06	4.94	4.72	4.22	5.58	4.28	4.39	3.78
Wind direction (°)	NE 55°	NE 56°	ENE 59°	ENE 59°	ENE 62°	ENE 64°	ENE 73°	E 81°	ENE 78°	E 89°	E 84°	E 85°	E 86°	E 85°	E 87°	E 96°	ESE 102°	ESE 104°	ESE 109°	ESE 117°	ESE 109°	ESE 123°	ESE 120°	SE 134°

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 (%)	89	90	91	92	94	95	96	95	92	85	76	70	67	66	67	69	72	76	80	84	88	87	89	89

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	764	765	765	766	766	766	767	767	767	767	767	767	767	767	766	766	765	765	766	765	766	765	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	0.1	0.5	3	4	4	3	3	4	3	3	3	2	2	0	0	0	0

← Fri, Apr 17

Sat, Apr 18, 2026

Boston 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 →