Waltham, MA
Climate overview — based on NOAA 1991-2020 normals from BEDFORD HANSCOM FLD, MA US.
Year-round temperatures (°F)
Climate summary
Waltham has an annual average temperature of 50.5°F with about 42.6 inches of precipitation per year. The warmest month is July (average high 85.1°F), and the coldest is January (average low 18.2°F). October is typically the wettest month (4.24 in) and February the driest (2.69 in).
Best time to visit Waltham
Full guide →Climate change signal
All-time records →110 of 366 (30.1%) of Waltham's all-time daily heat records have been set since 2015. If records were spread evenly across the station's history, only about 5% would fall in any given decade.
| 1940s | 23 | |
| 1950s | 70 | |
| 1960s | 36 | |
| 1970s | 6 | |
| 1990s | 11 | |
| 2000s | 80 | |
| 2010s | 74 | |
| 2020s | 66 |
Bars: number of all-time daily heat records still standing that were set in each decade.
Monthly averages
| Month | Avg High | Avg Low | Avg Temp | Precipitation | Snow | Rainy days |
|---|---|---|---|---|---|---|
| January | 36.8°F | 18.2°F | 27.5°F | 2.90 in | — | 11 |
| February | 39.4°F | 19.3°F | 29.3°F | 2.69 in | — | 10 |
| March | 47.5°F | 27.2°F | 37.3°F | 3.85 in | — | 10 |
| April | 59.9°F | 37.1°F | 48.5°F | 3.84 in | — | 13 |
| May | 70.4°F | 46.7°F | 58.6°F | 3.36 in | — | 13 |
| June | 79.4°F | 56.2°F | 67.8°F | 3.72 in | — | 14 |
| July | 85.1°F | 62.0°F | 73.6°F | 3.51 in | — | 12 |
| August | 83.6°F | 60.3°F | 71.9°F | 3.47 in | — | 12 |
| September | 75.7°F | 51.8°F | 63.7°F | 3.54 in | — | 12 |
| October | 63.6°F | 40.8°F | 52.2°F | 4.24 in | — | 13 |
| November | 52.4°F | 32.4°F | 42.4°F | 3.72 in | — | 11 |
| December | 42.0°F | 24.0°F | 33.0°F | 3.76 in | — | 11 |
Climate twins of Waltham
Why these? →The most climatically similar US cities at least 140 miles away (by monthly temperature + precipitation pattern).