Climate averages 1991–2020
Boston weather
in April.
A cool, wet month: the 7th warmest and the 9th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
April is a cool month in Boston: daytime highs average 13.2°C and nights cool to about 3.5°C. By daytime temperature it is the 7th warmest of the 12 months.
Expect about 100 mm of rain on roughly 11 days, which makes April a wet month (the 9th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 20 min on an average April day.
The nearest other city in this atlas is Dorchester (7 km away). In April its highs average 13.0°C, about as warm as Boston, with 100 mm of rain.
Among the 498 cities listed in the United States, Boston ranks joint 441st of 498 for the warmest April highs and joint 359th of 498 for the driest April (rainfall, lowest first). The mean April high of those 498 cities is 19.4°C; Boston is 6.2°C cooler than that mean.
From April to May, average highs rise by 5.6°C to 18.8°C, and monthly rainfall falls from 100 mm to 81 mm.
The annual picture
April 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, selected | 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 | 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
April in nearby cities
- Dorchester in AprilUnited States · 7 kmHigh 13.0°C · Low 3.8°C · 100 mm rain
- Newton in AprilUnited States · 13 kmHigh 13.4°C · Low 3.9°C · 93 mm rain
- Quincy in AprilUnited States · 13 kmHigh 12.5°C · Low 4.2°C · 100 mm rain
- Lynn in AprilUnited States · 15 kmHigh 11.4°C · Low 4.2°C · 103 mm rain
- Brockton in AprilUnited States · 31 kmHigh 12.9°C · Low 4.2°C · 95 mm rain
- Lowell in AprilUnited States · 37 kmHigh 13.5°C · Low 3.4°C · 95 mm rain
- Lawrence (Massachusetts), United States in AprilUnited States · 40 kmHigh 13.4°C · Low 3.5°C · 95 mm rain
- Nashua in AprilUnited States · 56 kmHigh 13.3°C · Low 3.0°C · 94 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.