Weather in Boston in February

The month to avoid. Of the twelve, February is the one to avoid. Highs sit at 2 °C and the day is short; this is an indoors-with-excursions month, not an outdoors-all-day one.

February ranks 10 of 12 — near the bottom of Boston's year. September is the month that works, and the swing between the two is 60 points, which is a different holiday rather than a slightly better one.

Rain on 9 days, 3 of them heavy. Enough to need a plan B, not enough to need a plan around it. Layers, and a genuinely waterproof outer — at 2 °C the difference between a good day and a miserable one is entirely down to what you are wearing.

What the averages hide

Averages flatten a month, and this one hides a few things: 26 nights drop below freezing, so anything left outside stays frozen. Across the twenty years measured, the hottest February day reached 18.7 °C and the coldest night fell to -25.5 °C, and the wettest single day dropped 65 mm — roughly 75% of the month's rain in one day.

February is statistically steady but not small: the year-to-year variation is modest in relative terms, yet the wettest February on record still delivered 202 mm against 29 mm in the driest. In a month this wet, even a tame spread is a lot of rain in absolute terms — the 87 mm average is a reasonable planning figure, not a promise.

Wind is light at 4.3 km/h, so the temperature on the page is close to the temperature on your skin, and humidity runs at 87%, which at 2 °C means damp rather than muggy — the kind of cold that gets into a coat and stays there.

How February sits in the year

Temperatures hold steady either side: 0.8 °C in January, 2 here, 6.4 in March. Nothing about the timing within the month matters much.

Daylight in February

10.5 hours of daylight, gaining 1.3 hours across the month. That is between Boston's extremes of 15.3 and 9.1 hours, so days are long enough not to constrain the plan.

Sea temperature

The sea sits at about 5.1 °C in February — too cold to swim without a wetsuit. The sea peaks at 19.7 °C in August and bottoms out at 4.6 °C — water lags the air by a month or two, which is why the best swimming often comes after the best weather.

How busy it gets

Off season. The genuine off season: cheapest by a distance, with the caveat that some tours and restaurants close entirely.

Crowd levels are estimated from climate desirability and school-holiday calendars, not from visitor numbers.

February in Boston versus nearby

If Boston is one option among several, the nearby comparison is worth making. New York City is close enough to be a coin toss — 2.1 °C warmer, the same number of rain days. Bar Harbor is close enough to be a coin toss — 2.3 °C cooler, 1 day more rain.

So: February is a compromise. September is 59 points better and is what Boston is actually like at its best — worth moving the trip for if that is possible, and worth adjusting expectations for if it is not.

Every month in Boston

See all twelve months in Boston, or where else to go in February.