Weather in Peterborough in January

The month to avoid. January is the month most people should skip in Peterborough. Highs sit at -3.8 °C and the day is short; this is an indoors-with-excursions month, not an outdoors-all-day one.

January ranks 11 of 12 — near the bottom of Peterborough's year. September is the month that works, and the swing between the two is 65 points, which is a different holiday rather than a slightly better one.

Rain on 10 days, 1 of them heavy. Enough to need a plan B, not enough to need a plan around it. Layers, and a genuinely waterproof outer — at -3.8 °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: 30 nights drop below freezing, so anything left outside stays frozen. Across the twenty years measured, the hottest January day reached 12 °C and the coldest night fell to -35 °C.

January is statistically steady but not small: the year-to-year variation is modest in relative terms, yet the wettest January on record still delivered 76 mm against 25 mm in the driest. In a month this wet, even a tame spread is a lot of rain in absolute terms — the 45 mm average is a reasonable planning figure, not a promise.

Wind is light at 4.9 km/h, so the temperature on the page is close to the temperature on your skin, and humidity runs at 91%, which at -3.8 °C means damp rather than muggy — the kind of cold that gets into a coat and stays there.

How January sits in the year

This is a turning point in the year — December and February sit on opposite sides of it, so the month contains the change rather than following it.

Daylight in January

January sits at the dark end of Peterborough's year — 9.2 hours of daylight against 15.5 at midsummer, gaining 0.8 hours across the month. Sightseeing days are genuinely shorter, and an itinerary built for summer will not fit.

An inland climate

Peterborough has no sea to moderate it, and it shows: 41.1 °C separates the hottest afternoon of the year from the coldest night. That is a genuinely continental range, and it means summer and winter here are barely the same place.

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.

January in Peterborough versus nearby

If Peterborough is one option among several, the nearby comparison is worth making. Barrie is close enough to be a coin toss — within a degree on temperature, 1 day more rain. Toronto is close enough to be a coin toss — 3.1 °C warmer, 4 days more rain.

So: January is a compromise. September is 63 points better and is what Peterborough 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 Peterborough

See all twelve months in Peterborough, or where else to go in January.