Weather in Halifax in December

The month to avoid. December is the month most people should skip in Halifax. Highs sit at 3.4 °C and the day is short; this is an indoors-with-excursions month, not an outdoors-all-day one.

December ranks 11 of 12 — near the bottom of Halifax's year. July is the month that works, and the swing between the two is 64 points, which is a different holiday rather than a slightly better one.

This is wet-season rain: 14 wet days and 5 genuinely heavy ones, which in this climate means concentrated downpours rather than all-day grey. The pattern is usually a clear morning and a loud afternoon, so front-load the day and stop fighting the 3pm hour. Layers, and a genuinely waterproof outer — at 3.4 °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: 21 nights drop below freezing, so anything left outside stays frozen; the day barely swings — 5.5 °C between the overnight low and the afternoon high. Across the twenty years measured, the hottest December day reached 13.9 °C and the coldest night fell to -14.2 °C, and the wettest single day dropped 53 mm — roughly 38% of the month's rain in one day.

December is statistically steady but not small: the year-to-year variation is modest in relative terms, yet the wettest December on record still delivered 199 mm against 59 mm in the driest. In a month this wet, even a tame spread is a lot of rain in absolute terms — the 141 mm average is a reasonable planning figure, not a promise.

Wind is light at 12 km/h, so the temperature on the page is close to the temperature on your skin, and humidity runs at 86%, which at 3.4 °C means damp rather than muggy — the kind of cold that gets into a coat and stays there.

How December sits in the year

The month is on the way down: 4.8 °C cooler than November, with January dropping another 3.6 °C. The first week and the last are not the same trip.

Daylight in December

December sits at the dark end of Halifax's year — 8.8 hours of daylight against 15.5 at midsummer, holding steady all month. Sightseeing days are genuinely shorter, and an itinerary built for summer will not fit.

Sea temperature

The sea sits at about 6.5 °C in December — too cold to swim without a wetsuit. The sea peaks at 17.8 °C in August and bottoms out at 1.2 °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.

December in Halifax versus nearby

If Halifax is one option among several, the nearby comparison is worth making. Moncton is close enough to be a coin toss — 3.4 °C cooler, 1 day less rain. Sydney is close enough to be a coin toss — within a degree on temperature, 3 days more rain.

So: December is a compromise. July is 63 points better and is what Halifax 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 Halifax

See all twelve months in Halifax, or where else to go in December.