Monthly climate guide
Boston weather in March
Expect cold weather in Boston in March: afternoons reach about 6°C (43°F), while nights drop to around -3°C (26°F). Around 86 mm of rain falls over the month (some rain), and skies are often cloudy. Daytime highs are 4°C warmer than February and 7°C cooler than April.
What stands out in March
- Just 320 km apart, but Boston runs about 3°C warmer than Bar Harbor this month.
- It warms up quickly from here: by April highs are about 7°C higher.
- March brings early spring to Boston.
- Nights often drop below freezing (average low -3°C), so expect frost and icy mornings.
Avg high
6°C
43°F
Avg low
-3°C
26°F
Rainfall
86 mm
some rain
Humidity
82%
relative
Sky
61%
cloud · often cloudy
Boston weather by month
Show the monthly averages as a table
| Month | Avg high | Avg low | Rain | Humidity | Cloud cover |
|---|---|---|---|---|---|
| January | 1°C / 34°F | -7°C / 19°F | 84 mm | 87% | 62% |
| February | 2°C / 35°F | -7°C / 19°F | 92 mm | 88% | 63% |
| March | 6°C / 43°F | -3°C / 26°F | 86 mm | 82% | 61% |
| April | 13°C / 55°F | 2°C / 36°F | 108 mm | 79% | 63% |
| May | 19°C / 66°F | 9°C / 47°F | 77 mm | 79% | 65% |
| June | 24°C / 74°F | 14°C / 56°F | 116 mm | 78% | 60% |
| July | 28°C / 83°F | 18°C / 64°F | 87 mm | 75% | 54% |
| August | 28°C / 82°F | 17°C / 63°F | 96 mm | 72% | 51% |
| September | 24°C / 75°F | 13°C / 56°F | 91 mm | 74% | 53% |
| October | 17°C / 63°F | 8°C / 46°F | 125 mm | 79% | 61% |
| November | 10°C / 49°F | 1°C / 34°F | 97 mm | 81% | 57% |
| December | 4°C / 40°F | -3°C / 27°F | 122 mm | 87% | 66% |
What to pack for March
- A proper insulated winter coat
- A hat, scarf and gloves
- Thermal base layers and warm, grippy boots for icy mornings
- A compact umbrella or packable rain jacket
- Water-resistant shoes
Is March a good time to visit Boston?
Compare the months in the chart above to find your ideal window.
Best time to visit Boston →Other United States cities in March
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Boston weather in March. WeatherCompare, 2026 (NASA POWER / ERA5, 2011–2020 monthly averages). https://weathercompare.eu/weather/usa/boston/march
<a href="https://weathercompare.eu/weather/usa/boston/march">Boston weather in March</a> (WeatherCompare)
<iframe src="https://weathercompare.eu/embed/usa/boston" width="300" height="160" style="border:0;border-radius:12px" loading="lazy" title="Boston weather in March"></iframe> <p style="font-size:12px"><a href="https://weathercompare.eu/weather/usa/boston/march">Boston weather in March</a> – WeatherCompare</p>
Boston in March: quick answers
Is March a good time to visit Boston?
March is cool in Boston, with highs around 6°C. Better for museums and city walks than the beach, and usually quieter.
How warm is Boston in March?
Average highs are about 6°C (43°F) and average lows about -3°C (26°F), based on 10 years of daily data.
Does it rain a lot in Boston in March?
Boston typically gets around 86 mm of rain in March — some rain.
Figures are long-term averages for the area around Boston (NASA POWER / ERA5, 2011–2020), not a forecast for a specific year. For upcoming days, see the live multi-source forecast.