Moncton weather by month

Warmest month

August

25°C average high

Coolest month

February

-6°C average low

Wettest month

December

52 mm of rain

Driest month

February

27 mm of rain

Average temperature and rainfall in Moncton by month

Averages of the daily highs and lows recorded in each month, with total rainfall, mean humidity and mean wind speed.

Month	Avg high	Avg low	Record low / high	Rainfall	Humidity	Wind
January	1°C	-6°C	-19°C / 12°C	45 mm	84%	19 km/h
February	1°C	-6°C	-19°C / 13°C	27 mm	82%	18 km/h
March	3°C	-4°C	-14°C / 11°C	45 mm	79%	19 km/h
April	8°C	1°C	-6°C / 16°C	50 mm	76%	18 km/h
May	14°C	6°C	1°C / 28°C	45 mm	78%	15 km/h
June	19°C	11°C	4°C / 30°C	50 mm	81%	12 km/h
July	24°C	16°C	10°C / 32°C	37 mm	80%	12 km/h
August	25°C	16°C	9°C / 32°C	37 mm	82%	11 km/h
September	20°C	12°C	2°C / 27°C	43 mm	79%	12 km/h
October	15°C	8°C	1°C / 24°C	45 mm	84%	14 km/h
November	8°C	1°C	-8°C / 20°C	50 mm	82%	17 km/h
December	4°C	-3°C	-16°C / 14°C	52 mm	82%	18 km/h

Frost and snow-likely months in Moncton

Nights in Moncton average 2°C or below in 6 months (January, February, March, April, November and December). January, February, March and December combine average lows at or below 0°C with 10 mm or more of monthly precipitation, so precipitation then is likely to fall as snow. The coldest month is February with an average low of -6°C and a record low of -19°C.

January: average low -6°C, record low -19°C, 45 mm of precipitation — snow-likely
February: average low -6°C, record low -19°C, 27 mm of precipitation — snow-likely
March: average low -4°C, record low -14°C, 45 mm of precipitation — snow-likely
April: average low 1°C, record low -6°C, 50 mm of precipitation
November: average low 1°C, record low -8°C, 50 mm of precipitation
December: average low -3°C, record low -16°C, 52 mm of precipitation — snow-likely

These records carry temperature and precipitation, not snowfall totals.

Best time to visit Moncton

The most comfortable time to visit Moncton is generally July to September, balancing mild daytime temperatures against the driest stretch of the year. The city has strongly marked seasons and rainfall is spread evenly across the months, totalling about 526 mm a year.

Travellers who prefer heat should aim for August, when highs average 25°C. December is the month to avoid if rain would spoil your plans — it averages 52 mm, roughly 2× the rainfall of the driest month (February).

Moncton climate: your questions

Does it snow in Moncton?

Yes, in winter: January, February, March and December average lows at or below 0°C with 10 mm or more of monthly precipitation, so some of it falls as snow. The coldest month is February (average low -6°C, record low -19°C). Our records carry temperature and precipitation, not snowfall totals. What is falling now: Moncton weather today.

When is it going to snow in Moncton this month?

Moncton's winter months average lows of -3°C in December, -6°C in January and -6°C in February, with about 124 mm of precipitation across the three; 3 of them sit at or below 0°C, so snow is likely on the colder days. The records hold no snowfall totals. The next 15 days: Moncton 10-day forecast.

When is the best time to visit Moncton?

July to September are the most comfortable months in Moncton, with highs near 23°C. August is the warmest month, averaging 25°C by day; December is the wettest, with 52 mm; and February is the coolest, with lows near -6°C. What it is doing today: Moncton weather today.

Source: OpenWeather historical and statistical weather data. Values are long-term averages, not a forecast — see the Moncton forecast for what is happening now.