5-day weather forecast Boston 04-09-2026
Weather forecast Boston tomorrow 04.09.2026: overcast, temperature from 18 °C to 28 °C.
Precipitation probability 45%. Wind up to 4.19 m/s (gusts 9.72 m/s). Air humidity 41–99%, atmospheric pressure 755–758 mm Hg, UV index up to 6.3.
5 days at a glance — tap a day to open it
Sunrise 06:12
Sunset 19:13
Sunset 19:13
Last Quarter39% illuminated
Moonrise 22:59 · Moonset 14:26
Moonrise 22:59 · Moonset 14:26
Chart
Table
| Temperature | Rain chance | Cloud cover | Humidity | Pressure | Wind | UV Index | ||
|---|---|---|---|---|---|---|---|---|
| 00:00 |  Fog | 19 °C | 45% (0.01 mm/hr) | 100% | 99% | 758 mm Hg | NNE 33° 1.89 (2.5) m/s | 0 |
| 01:00 | Fog | 19 °C | 45% (0.02 mm/hr) | 100% | 99% | 758 mm Hg | NE 43° 1.5 (1.89) m/s | 0 |
| 02:00 | Fog | 19 °C | 44% (0.02 mm/hr) | 100% | 98% | 758 mm Hg | NNE 15° 1.69 (2.53) m/s | 0 |
| 03:00 | Fog | 18 °C | 43% (0.01 mm/hr) | 100% | 98% | 758 mm Hg | N 7° 1.61 (2.81) m/s | 0 |
| 04:00 |  Mist | 19 °C | 33% | 77% | 97% | 758 mm Hg | NNW 343° 1.39 (3.22) m/s | 0 |
| 05:00 | Mist | 19 °C | 24% | 34% | 96% | 758 mm Hg | NNW 335° 1.81 (2.83) m/s | 0 |
| 06:00 | Fog | 18 °C | 42% | 100% | 97% | 758 mm Hg | NW 325° 1.19 (1.31) m/s | 0 |
| 07:00 |  Mist | 18 °C | 20% | 5% | 96% | 758 mm Hg | WNW 298° 1.61 (2.64) m/s | 0.2 |
| 08:00 |  Partly cloudy | 19 °C | 19% | 50% | 91% | 758 mm Hg | WNW 300° 1.81 (3.14) m/s | 0.7 |
| 09:00 |  Overcast | 21 °C | 24% | 100% | 81% | 758 mm Hg | WNW 291° 2 (3.31) m/s | 1.9 |
| 10:00 | Partly cloudy | 23 °C | 9% | 53% | 66% | 758 mm Hg | WNW 298° 2.39 (4.11) m/s | 3.4 |
| 11:00 | Partly cloudy | 25 °C | 7% | 56% | 56% | 758 mm Hg | NW 307° 2.5 (4.11) m/s | 5.2 |
| 12:00 | Overcast | 26 °C | 11% | 100% | 49% | 757 mm Hg | NW 318° 2.39 (4.11) m/s | 6.3 |
| 13:00 | Overcast | 27 °C | 10% | 96% | 46% | 757 mm Hg | NNW 328° 2.31 (4.42) m/s | 5.8 |
| 14:00 |  Sunny | 27 °C | 1% | 6% | 45% | 756 mm Hg | NW 322° 1.61 (4.31) m/s | 4.5 |
| 15:00 | Sunny | 28 °C | 2% | 14% | 42% | 755 mm Hg | NW 312° 1.89 (4.53) m/s | 3.7 |
| 16:00 | Partly cloudy | 28 °C | 3% | 35% | 41% | 755 mm Hg | NW 310° 2.19 (4.42) m/s | 2.4 |
| 17:00 | Overcast | 28 °C | 9% | 92% | 41% | 755 mm Hg | NW 306° 2.11 (4.22) m/s | 0.6 |
| 18:00 | Overcast | 25 °C | 12% | 100% | 50% | 755 mm Hg | N 4° 4.19 (7.89) m/s | 0.2 |
| 19:00 | Overcast | 24 °C | 14% | 100% | 60% | 756 mm Hg | NNE 14° 1.39 (4) m/s | 0 |
| 20:00 |  Partly cloudy | 23 °C | 8% | 52% | 63% | 756 mm Hg | NNW 338° 1.11 (1.92) m/s | 0 |
| 21:00 |  Overcast | 23 °C | 15% | 96% | 65% | 756 mm Hg | NW 313° 1.81 (2.83) m/s | 0 |
| 22:00 | Overcast | 22 °C | 13% | 89% | 62% | 756 mm Hg | NW 319° 3.89 (7.92) m/s | 0 |
| 23:00 | Partly cloudy | 21 °C | 8% | 47% | 63% | 756 mm Hg | NNW 330° 4.19 (9.72) m/s | 0 |
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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.