Weather in Curitiba in August

Prime time. August is about as good as Curitiba gets. Highs average 21.1 °C, lows 9.8 °C, and rain falls on 8 days — nothing in the month is working against you.

August is the highest-scoring month of the twelve. The nearest rival is July, and the month at the other end of the year is February.

Rain on 8 days, 3 of them heavy. Enough to need a plan B, not enough to need a plan around it. Nothing specialised needed — this is the month you pack for the trip rather than for the weather.

What the averages hide

Averages flatten a month, and this one hides a few things: it never really gets hot: not one day in an average August reaches 30 °C. Across the twenty years measured, the hottest August day reached 29.2 °C and the coldest night fell to -1.1 °C, and the wettest single day dropped 67 mm — roughly 87% of the month's rain in one day.

August is moderately variable: 15 mm in the driest year against 183 mm in the wettest, around an average of 77 mm. Roughly two Augusts in three land near that average, and the third does something else entirely.

Wind is light at 3.3 km/h, so the temperature on the page is close to the temperature on your skin, and humidity runs at 81%, high enough to notice on the warm days without dominating them.

How August sits in the year

The month is on the way up: 1.9 °C warmer than July, and September adds another 1.8 °C. Late in the month feels noticeably different from the start of it, which is worth knowing if the trip is short. Rain is the thing that moves: September brings 5 days more of it, so the earlier half of a flexible trip is the safer half.

Daylight in August

August sits at the dark end of Curitiba's year — 11.2 hours of daylight against 13.7 at midsummer, gaining 0.6 hours across the month. Sightseeing days are genuinely shorter, and an itinerary built for summer will not fit.

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

Peak season. Expect the highest prices of the year and to be booking well ahead. If the dates are flexible, June is the trade worth considering — 7 points weaker on weather, and materially quieter.

Crowd levels are estimated from climate desirability and school-holiday calendars, not from visitor numbers.

August 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 — 3.5 °C warmer, 1 day less rain. Porto Alegre is close enough to be a coin toss — within a degree on temperature, 3 days more rain.

So: August is the answer for Curitiba. If it is booked out or priced out, July is the next best thing at 6 points behind, and February is the month to keep off the shortlist.

Every month in Curitiba

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