Climate averages 1991–2020
Boston weather
in October.
A mild, wet month: the 6th warmest and the 10th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
October is a mild month in Boston: daytime highs average 16.0°C and nights cool to about 8.1°C. By daytime temperature it is the 6th warmest of the 12 months.
Expect about 108 mm of rain on roughly 10 days, which makes October a wet month (the 10th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 06 min on an average October day.
The nearest other city in this atlas is Dorchester (7 km away). In October its highs average 15.9°C, about as warm as Boston, with 108 mm of rain.
Among the 498 cities listed in the United States, Boston ranks joint 411th of 498 for the warmest October highs and joint 457th of 498 for the driest October (rainfall, lowest first). The mean October high of those 498 cities is 21.4°C; Boston is 5.4°C cooler than that mean.
From October to November, average highs fall by 6.1°C to 9.8°C, and monthly rainfall falls from 108 mm to 95 mm.
The annual picture
October in context
Monthly precipitation
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Boston climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 1.5°C-7.2°C | -7.2°C | 94 | 10.0 | 9.59 h |
| February | 2.8°C-6.3°C | -6.3°C | 84 | 8.9 | 10.511 h |
| March | 6.7°C-2.4°C | -2.4°C | 116 | 11.1 | 11.912 h |
| April | 13.2°C3.5°C | 3.5°C | 100 | 11.0 | 13.313 h |
| May | 18.8°C9.3°C | 9.3°C | 81 | 10.6 | 14.615 h |
| June | 24.1°C14.9°C | 14.9°C | 87 | 10.1 | 15.215 h |
| July | 27.5°C18.4°C | 18.4°C | 73 | 9.6 | 14.915 h |
| August | 26.6°C17.9°C | 17.9°C | 85 | 9.1 | 13.914 h |
| September | 22.4°C14.1°C | 14.1°C | 88 | 8.1 | 12.513 h |
| October, selected | 16.0°C8.1°C | 8.1°C | 108 | 9.8 | 11.111 h |
| November | 9.8°C2.4°C | 2.4°C | 95 | 9.6 | 9.810 h |
| December | 4.4°C-3.1°C | -3.1°C | 115 | 10.8 | 9.19 h |
Precipitation (rain or snow, as water) is the average of the 30 separate monthly totals. A wet day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
October in nearby cities
- Dorchester in OctoberUnited States · 7 kmHigh 15.9°C · Low 8.5°C · 108 mm rain
- Newton in OctoberUnited States · 13 kmHigh 16.1°C · Low 8.4°C · 99 mm rain
- Quincy in OctoberUnited States · 13 kmHigh 15.9°C · Low 9.0°C · 108 mm rain
- Lynn in OctoberUnited States · 15 kmHigh 15.2°C · Low 9.1°C · 109 mm rain
- Brockton in OctoberUnited States · 31 kmHigh 16.0°C · Low 8.9°C · 104 mm rain
- Lowell in OctoberUnited States · 37 kmHigh 15.9°C · Low 7.7°C · 96 mm rain
- Lawrence (Massachusetts), United States in OctoberUnited States · 40 kmHigh 15.9°C · Low 7.9°C · 96 mm rain
- Nashua in OctoberUnited States · 56 kmHigh 15.5°C · Low 7.2°C · 97 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Boston) is explained once on the Boston year overview and on the Sources, method and limits page.
Dorchester and Quincy lie in the same rainfall cell, so their rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.