Weather in Curitiba in January

Shoulder season. January sits in between. You will get good days and you will lose some. You should expect rain on 25 days of the month, which is more days wet than dry.

January ranks 11 of 12 — near the bottom of Curitiba's year. August is the month that works, and the swing between the two is 21 points, which is a different holiday rather than a slightly better one.

Rain on 25 of the month's 31 days, 8 of them heavy. At that frequency a wet-weather backup is not a contingency, it is the itinerary — book the indoor things first and treat the clear days as the bonus. Natural fibres and a second shirt for the day. At 83% nothing dries, including you.

What the averages hide

The averages here are honest — no hidden extremes worth planning around. Across the twenty years measured, the hottest January day reached 33.9 °C and the coldest night fell to 10.8 °C, and the wettest single day dropped 50 mm — roughly 23% of the month's rain in one day.

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 381 mm against 95 mm in the driest. In a month this wet, even a tame spread is a lot of rain in absolute terms — the 221 mm average is a reasonable planning figure, not a promise.

Wind is light at 3.5 km/h, so the temperature on the page is close to the temperature on your skin, and humidity runs at 83%, high enough to notice on the warm days without dominating them.

How January sits in the year

Temperatures hold steady either side: 26.5 °C in December, 26.4 here, 26.5 in February. Nothing about the timing within the month matters much.

Daylight in January

January is at or near the longest days of Curitiba's year: 13.6 hours of daylight, losing 0.4 hours across the month. Evenings are the real gain — dinner outdoors still happens in full light.

An inland climate

Despite being inland, the year stays fairly even: 17.3 °C between the year's warmest afternoons and coldest nights. At 924 m the air is thin enough to matter — sun that burns faster than the temperature suggests, and nights that cool off quickly.

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 Curitiba versus nearby

If Curitiba is one option among several, the nearby comparison is worth making. São Paulo is close enough to be a coin toss — within a degree on temperature, 1 day less rain. Porto Alegre is close enough to be a coin toss — 3 °C warmer, 10 days less rain.

So: January is a compromise. August is 21 points better and is what Curitiba 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 Curitiba

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