Boston, Massachusetts, United States weather records
Record high and low temperatures for Boston, Massachusetts, United States, by month, by season, and all-time, with the dates they occurred, across 1981–2026 of daily climate history. Its hottest day on record reached 100°F on 2002-08-14; its coldest fell to -15°F on 2015-02-24.
Records by month
The warmest (▲) and coldest (▼) both the daytime high and the overnight low have ever been in each calendar month, so each column shows its record high and its record low. Tap a month for its full averages and typical range.
| Month | Daytime high | Overnight low |
|---|---|---|
| January | 64°F2007-01-06
-1°F1994-01-16
|
47°F1995-01-16
-14°F1994-01-16
|
| February | 65°F2018-02-21
5°F1995-02-06
|
45°F2017-02-25
-15°F2015-02-24
|
| March | 76°F1998-03-31
16°F2007-03-06
|
56°F1998-03-31
-3°F2015-03-06
|
| April | 86°F2002-04-17
19°F1982-04-07
|
57°F2019-04-20
13°F1982-04-07
|
| May | 89°F2016-05-28
43°F2007-05-18
|
66°F2017-05-18
30°F1992-05-06
|
| June | 94°F2021-06-29
51°F2017-06-06
|
74°F2025-06-24
40°F1986-06-03
|
| July | 98°F2025-07-29
60°F2021-07-03
|
76°F2026-07-03
45°F1988-07-01
|
| August | 100°F2002-08-14
61°F1988-08-24
|
76°F2006-08-02
43°F1982-08-29
|
| September | 97°F2002-09-09
53°F1992-09-30
|
71°F2010-09-03
35°F1991-09-30
|
| October | 86°F2007-10-05
36°F2000-10-29
|
65°F2017-10-09
22°F2020-10-31
|
| November | 77°F2024-11-06
17°F2018-11-22
|
62°F2022-11-06
10°F2014-11-29
|
| December | 67°F2001-12-01
5°F1983-12-25
|
57°F2006-12-01
-5°F1983-12-25
|
Records by season
The warmest (▲) and coldest (▼) both the daytime high and the overnight low have reached in each meteorological season (Northern Hemisphere, each a three-month span).
| Season | Daytime high | Overnight low |
|---|---|---|
| Winter (Dec–Feb) | 67°F2001-12-01
-1°F1994-01-16
|
57°F2006-12-01
-15°F2015-02-24
|
| Spring (Mar–May) | 89°F2016-05-28
16°F2007-03-06
|
66°F2017-05-18
-3°F2015-03-06
|
| Summer (Jun–Aug) | 100°F2002-08-14
51°F2017-06-06
|
76°F2006-08-02
40°F1986-06-03
|
| Autumn (Sep–Nov) | 97°F2002-09-09
17°F2018-11-22
|
71°F2010-09-03
10°F2014-11-29
|
All-time records
The most extreme value Boston has recorded for each metric across its entire history.
High
Low
Feels-like
Humidity
Wind
Precip
For rainfall, the “driest” figure is the longest run of consecutive days without measurable rain, dated to when that dry spell began.