Massachusetts has warm summers and cold, snowy winters: NOAA's 1991–2020 normals for Boston Logan Airport give highs of 80.4–82.1°F in July and August and 36.8°F in January, with 14.4 inches of snow in February and December the wettest month at 4.30 inches. Worcester, inland, runs colder. Choose by activity; we have no verified dataset for crowds, events or prices.
Month-by-month climate table
| Month | Normal high | Normal low | Normal precipitation | Normal snowfall | Verified notes |
|---|---|---|---|---|---|
| January | 36.8°F | 23.1°F | 3.39 in | 14.3 in | — |
| February | 39.0°F | 24.6°F | 3.21 in | 14.4 in | — |
| March | 45.5°F | 31.1°F | 4.17 in | 9.0 in | — |
| April | 56.4°F | 40.8°F | 3.63 in | 1.6 in | — |
| May | 66.5°F | 50.3°F | 3.25 in | 0.0 in | — |
| June | 76.2°F | 59.7°F | 3.89 in | 0.0 in | — |
| July | 82.1°F | 66.0°F | 3.27 in | 0.0 in | — |
| August | 80.4°F | 65.1°F | 3.23 in | 0.0 in | — |
| September | 73.1°F | 58.2°F | 3.56 in | 0.0 in | — |
| October | 62.1°F | 47.5°F | 4.03 in | 0.2 in | — |
| November | 51.6°F | 37.9°F | 3.66 in | 0.7 in | — |
| December | 42.2°F | 29.2°F | 4.30 in | 9.0 in | — |
Source: NOAA NCEI U.S. Climate Normals 1991–2020, Boston Logan International Airport (USW00014739), retrieved October 20, 2026. Normals are 30-year averages; actual weather varies.
Boston vs Worcester
| Station | January high / low | July high / low | Wettest month | Peak snowfall |
|---|---|---|---|---|
| Boston Logan | 36.8°F / 23.1°F | 82.1°F / 66.0°F | December (4.30 in) | 14.4 in (February) |
| Worcester | 32.3°F / 17.1°F | 79.8°F / 61.7°F | October (4.84 in) | 21.2 in (February) |
How to choose your month
- Warmest: June–August (Logan highs 76.2–82.1°F).
- Coldest: December–February (Logan highs 36.8–42.2°F).
- Snowiest: January and February (about 14 inches each at Logan).
Limits of this guide
Normals describe typical conditions, not forecasts, and we have no verified dataset for coastal weather, foliage, event dates, crowds or prices by month, so this page makes no such claims. Use the National Weather Service for forecasts.