The best time to visit Saint John
Month-by-month climate averages for Saint John, New Brunswick, so you can pick your dates on data rather than guesswork.
The most comfortable time to visit Saint John is usually June, July, August and September, when daytime highs sit in the pleasant 16-26°C range and the heaviest November rain is behind you.
Saint John is warmest in July (highs near 22°C) and coldest in February (lows around -11°C), with roughly 1338 mm of precipitation across the year and November the wettest month. The sweet spot for most visitors is June, July, August and September. Expect overnight frost in January, February, March and December.
These are long-run averages. For the actual days you are travelling, check the live Saint John forecast - and note how much the models agree, because that tells you how much to trust it.
Saint John weather by month
what to expect in Saint John through the year, 1991-2020 averagesHere is Saint John's typical weather in each month: the average daytime high and overnight low in °C, how each month feels, and the wettest month marked. Use it to plan any trip to Saint John by season.