Rainy days · Massachusetts
How often does it rain in Boston?
Boston’s rain arrives sideways off the harbor and complains about the traffic on the way in.
Boston gets measurable rain or snow on about 128 days a year, adding up to about 43 inches.
November usually brings Boston about 10 wet days and 3.7 inches. The wettest month is usually December, with about 12 wet days, and the driest is August, with about 9 wet days. That makes Boston number 35 of the 129 US cities we track, rainiest first.
Last updated
No rain in the forecast for the next 48 hours.
Live 48-hour check from OpenWeatherMap, refreshed about every half hour. Alerts from the National Weather Service.
Rainy days, month by month
| Month | Wet days | Inches |
|---|---|---|
| January | 12 | 3.4 |
| February | 11 | 3.2 |
| March | 12 | 4.2 |
| April | 12 | 3.6 |
| May | 12 | 3.3 |
| June | 11 | 3.9 |
| July | 9 | 3.3 |
| August | 9 | 3.1 |
| September | 9 | 3.5 |
| October | 11 | 4.0 |
| November | 10 | 3.7 |
| December | 12 | 4.3 |
Cities with about as many rainy days
- Indianapolis, Indiana: about 128 wet days a year
- Knoxville, Tennessee: about 129 wet days a year
- Louisville, Kentucky: about 127 wet days a year
Source: NOAA daily precipitation records for the Boston area, 1991 to 2020 (at least 30 complete years behind every month), via the Applied Climate Information System. A wet day here means at least a hundredth of an inch of rain or melted snow.