5-day weather forecast Boston Sep 27, 2026
14°Weather forecast Boston Sunday Sep 27, 2026: light rain shower, temperature from 12 °C to 14 °C.
Precipitation probability 87%. Wind up to 8.69 m/s (gusts 18.92 m/s). Air humidity 93–96%, atmospheric pressure 754–756 mm Hg, UV index up to 0.3.
Weather Alerts
Small Craft Advisory issued September 23 at 3:58PM EDT until September 25 at 8:00AM EDT by NWS Boston/Norton MA
Small Craft Advisory
* WHAT...For the Small Craft Advisory, northeast winds 15 to 25
kt with gusts up to 30 kt and waves 2 to 3 feet. For the Gale
Warning, north winds 20 to 30 kt with gusts up to 45 kt and
waves 2 to 4 feet expected.
* WHERE...Boston Harbor.
* WHEN...For the Small Craft Advisory, until 8 AM EDT Friday.
For the Gale Warning, from 8 AM Friday to 8 PM EDT Saturday.
* IMPACTS...Strong winds will cause hazardous waves which could
capsize or damage vessels and reduce visibility.
Mariners should alter plans to avoid these hazardous conditions.
Remain in port, seek safe harbor, alter course, and/or secure the
vessel for hazardous conditions.
Gale Warning issued September 23 at 3:58PM EDT until September 26 at 8:00PM EDT by NWS Boston/Norton MA
Gale Warning
* WHAT...For the Small Craft Advisory, northeast winds 15 to 25
kt with gusts up to 30 kt and waves 2 to 3 feet. For the Gale
Warning, north winds 20 to 30 kt with gusts up to 45 kt and
waves 2 to 4 feet expected.
* WHERE...Boston Harbor.
* WHEN...For the Small Craft Advisory, until 8 AM EDT Friday.
For the Gale Warning, from 8 AM Friday to 8 PM EDT Saturday.
* IMPACTS...Strong winds will cause hazardous waves which could
capsize or damage vessels and reduce visibility.
Mariners should alter plans to avoid these hazardous conditions.
Remain in port, seek safe harbor, alter course, and/or secure the
vessel for hazardous conditions.
5 days at a glance — tap a day to open it
Sunrise 06:37
Sunset 18:33
Sunset 18:33
Waning Gibbous96% illuminated
Moonrise 18:43 · Moonset 07:38
Moonrise 18:43 · Moonset 07:38
Chart
Table
Sun, Sep 27, 2026
| Time | Weather | Temperature | Rain chance | Cloud cover | Humidity | Pressure | Wind | UV Index |
|---|---|---|---|---|---|---|---|---|
| 00:00 |  Light rain shower | 12 °C | 70% (0.75 mm/hr) | 100% | 94% | 754 mm Hg | NNW 339° 7.81 (14.14) m/s | 0 |
| 01:00 |  Light rain | 12 °C | 78% (1.46 mm/hr) | 100% | 93% | 754 mm Hg | NNW 346° 7.81 (13.61) m/s | 0 |
| 02:00 | Light rain shower | 12 °C | 75% (0.96 mm/hr) | 100% | 94% | 754 mm Hg | NNW 348° 7.19 (12.72) m/s | 0 |
| 03:00 | Light rain shower | 12 °C | 71% (0.77 mm/hr) | 100% | 95% | 754 mm Hg | NNW 346° 6.69 (12.61) m/s | 0 |
| 04:00 | Light rain shower | 12 °C | 67% (0.56 mm/hr) | 100% | 96% | 754 mm Hg | NNW 345° 6.39 (13.61) m/s | 0 |
| 05:00 | Light rain shower | 12 °C | 67% (0.58 mm/hr) | 100% | 96% | 754 mm Hg | NNW 345° 6.5 (14.31) m/s | 0 |
| 06:00 | Light rain shower | 12 °C | 73% (0.86 mm/hr) | 100% | 96% | 754 mm Hg | N 349° 6.5 (14.61) m/s | 0 |
| 07:00 | Light rain shower | 12 °C | 77% (1.06 mm/hr) | 100% | 95% | 754 mm Hg | N 352° 6.5 (15.22) m/s | 0 |
| 08:00 | Light rain shower | 12 °C | 74% (0.92 mm/hr) | 100% | 95% | 754 mm Hg | N 352° 6.69 (15.42) m/s | 0 |
| 09:00 |  Light rain | 12 °C | 79% (1.48 mm/hr) | 100% | 94% | 754 mm Hg | N 353° 7.19 (15.81) m/s | 0.1 |
| 10:00 | Light rain | 12 °C | 83% (2.27 mm/hr) | 100% | 94% | 754 mm Hg | N 351° 7.5 (16.33) m/s | 0.1 |
| 11:00 | Light rain | 12 °C | 85% (2.49 mm/hr) | 100% | 95% | 754 mm Hg | NNW 347° 7.89 (17.31) m/s | 0.2 |
| 12:00 | Light rain | 12 °C | 84% (2.41 mm/hr) | 100% | 94% | 754 mm Hg | NNW 346° 8 (17.72) m/s | 0.2 |
| 13:00 |  Moderate rain | 12 °C | 87% (3.1 mm/hr) | 100% | 95% | 754 mm Hg | N 352° 8.69 (18.92) m/s | 0.2 |
| 14:00 | Light rain shower | 14 °C | 57% (0.36 mm/hr) | 100% | 94% | 754 mm Hg | NNW 342° 8.69 (16.03) m/s | 0.3 |
| 15:00 | Light rain shower | 14 °C | 60% (0.4 mm/hr) | 100% | 94% | 754 mm Hg | NNW 343° 8.69 (15.89) m/s | 0.2 |
| 16:00 | Light rain shower | 14 °C | 65% (0.5 mm/hr) | 100% | 95% | 754 mm Hg | NNW 344° 8.61 (15.81) m/s | 0.1 |
| 17:00 | Light rain shower | 14 °C | 66% (0.53 mm/hr) | 100% | 96% | 754 mm Hg | NNW 345° 8.61 (15.72) m/s | 0 |
| 18:00 | Light rain shower | 14 °C | 60% (0.4 mm/hr) | 100% | 96% | 755 mm Hg | NNW 347° 8.19 (15.19) m/s | 0 |
| 19:00 | Light rain shower | 14 °C | 55% (0.3 mm/hr) | 100% | 96% | 755 mm Hg | NNW 348° 7.81 (14.61) m/s | 0 |
| 20:00 | Light rain shower | 14 °C | 52% (0.25 mm/hr) | 100% | 96% | 755 mm Hg | N 350° 7.39 (14) m/s | 0 |
| 21:00 |  Patchy rain possible | 14 °C | 49% (0.2 mm/hr) | 100% | 96% | 755 mm Hg | N 349° 7.11 (13.61) m/s | 0 |
| 22:00 | Light rain shower | 14 °C | 44% (0.1 mm/hr) | 100% | 96% | 755 mm Hg | NNW 347° 6.81 (13.11) m/s | 0 |
| 23:00 | Patchy rain possible | 14 °C | 43% (0.09 mm/hr) | 100% | 95% | 756 mm Hg | NNW 346° 6.5 (12.69) m/s | 0 |
Sun, Sep 27, 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.