Climate in Boston: average temperature by month
In Boston the warmest month is July, with 27.6 °C on average in the afternoon; the coolest is January, with 1.9 °C.
The average of the weather stations Blue Hill Coop (17 km) and Nashua (59 km); nearer ones count more.
| Month | Average high | Coolest to warmest day |
|---|---|---|
| January | 1.9 °C | 1.3 °C – 2.6 °C |
| February | 2.9 °C | 1.6 °C – 4.6 °C |
| March | 7.3 °C | 4.7 °C – 10.1 °C |
| April | 13.5 °C | 10.3 °C – 16.1 °C |
| May | 19.5 °C | 16.4 °C – 22.2 °C |
| June | 24.5 °C | 22.3 °C – 26.9 °C |
| July | 27.6 °C | 26.9 °C – 28.0 °C |
| August | 26.8 °C | 25.3 °C – 27.8 °C |
| September | 22.6 °C | 19.8 °C – 25.2 °C |
| October | 16.7 °C | 13.8 °C – 19.7 °C |
| November | 10.2 °C | 7.0 °C – 13.7 °C |
| December | 4.3 °C | 2.9 °C – 6.7 °C |