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Boston in March: weather, sea & travel advice
This month's data profile
Rain shapes the decision
Boston in March is climatically mixed. The average daily high is around 6 °C, and the sea is about 4 °C. With about 11 rainy days it is wet.
Historical monthly averages, not a weather forecast. Individual days and years can differ substantially.
Rank among 12 monthly averages
30/100 · #9
Warmth
#9
Dryness
#7
Sun
#7
Sea warmth
#11
Published best categories: none
Boston · MarchPhoto: Chris Wood ( User:chris_j_wood ) · CC BY-SA 4.0Climate facts
- Average high
- 6 °C
- Average low
- -3 °C
- Sea
- 4 °C
- Rainy days (est.)
- 11 rainy days (est.)
- Sun (est.)
- 5 h/day
- Humidity
- 83 %
Climate evidence with direct month comparison
The highlighted row is the selected month. Precipitation total and rainy days are separate monthly averages.
| Month | Avg high °C | Avg low °C | Rainy days (est.) | Precipitation mm | Sun h/day (est.) | Humidity % | Wind m/s | Sea °C | Score |
|---|---|---|---|---|---|---|---|---|---|
| February | 2 | -7 | 9 | 83 | 3.3 | 87 | 1.2 | 3 | 30 |
| March (selected) | 6 | -3 | 11 | 114 | 4.6 | 83 | 1.0 | 4 | 30 |
| April | 13 | 2 | 11 | 104 | 5.8 | 79 | 0.6 | 6 | 40 |
How do the previous and next months compare?
Baseline: March (30/100)
Positive and negative values show the change from the selected month.
| Score Δ | Average high Δ | Average low Δ | Rainy days Δ | Rain Δ | Sun Δ | Humidity Δ | Wind Δ | Sea Δ | |
|---|---|---|---|---|---|---|---|---|---|
| February | ±0 | -4.5 °C | -4 °C | -1.9 | -30.5 mm | -1.3 h | +3.6 % | +0.2 m/s | -0.2 °C |
| April | +10 | +6.5 °C | +5.2 °C | -0.2 | -9.4 mm | +1.2 h | -3.7 % | -0.4 m/s | +2.3 °C |
All twelve months in context
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Useful next decisions
Frequently asked questions
How warm is Boston in March?
The average daily high is around 6 °C, with an average daily low of about -3 °C.
Can you swim in Boston in March?
The sea is about 4 °C (cold).
Does it rain a lot in Boston in March?
The curated estimate is about 11 rainy days per month, not a directly measured long-term average. Total precipitation averages around 114 mm for the month. A rainy day does not mean all-day rain.
When is the best time to visit Boston?
By the climate score, June, July, August and September are the strongest months for Boston. For a beach trip: July, August and September. March is not among them.