Curitiba weather in May

May in Curitiba: nice, rainy, with clean air — an excellent time to visit.

Updated September 2026 · climate normals from ERA5 reanalysis

Curitiba🇧🇷 Brazil · Southern Brazil & Iguazú · City82
  1. 74Jan
  2. 77Feb
  3. 81Mar
  4. 88Apr
  5. 82May
  6. 81Jun
  7. 86Jul
  8. 83Aug
  9. 87Sep
  10. 78Oct
  11. 85Nov
  12. 78Dec

#6 of 12 months in Curitiba · #636 of 1413 destinations to visit in May · comfort 82/100 (tier A)

Days
21°C
Nights
13°C
Wet days
9
Sun
7.1 h
Humidity
84%
Daylight
11 h
Curitiba, Brazil
Photo: Cláudio Emanuel · Pexels

Traveller notes on Curitiba in May

Other months in Curitiba

Forum posters generally rate October as one of the best months in Brazil weather-wise, marking the start of spring, though posters flag it can still bring real rain during this seasonal transition. Posters describe Curitiba specifically as running noticeably colder than São Paulo, with one discussion citing conditions near 0C possible even outside the deepest part of winter, and forecasts elsewhere in the 10-19C range typical for the shoulder season. Given the limited destination-specific detail for October exactly, this note leans on that broader pattern: Curitiba's high-elevation, southern setting keeps it consistently cooler than most other major Brazilian cities, and October should trend mild rather than warm here even as much of the rest of the country moves into spring. Posters generally rate October as a cool, transitional month for Curitiba, layers still recommended.
Tripadvisor community · October · 1 month ago · Read more on Tripadvisor ↗
Forum posters describe Curitiba's climate as distinctly cool for a Brazilian city, a direct result of its high elevation - one visitor specifically contrasted needing cold-weather clothes in Curitiba while nearby lower-elevation Morretes, just down the mountain, felt properly hot and muggy on the same day. April sits within the city's cooler autumn stretch, comfortable for walking the extensive park system without Brazil's more typical heat and humidity. Posters consistently name the French-inspired Botanical Garden (with its art nouveau greenhouse) and Parque Barigui as the standout April outings, well suited to the mild, temperate conditions this elevation provides.
Tripadvisor community · April · 1 month ago · Read more on Tripadvisor ↗

Add your own note from Curitiba's card on the map.

Curitiba climate normals — May

Daytime high21°C / 70°F😎 nice
Nighttime low13°C / 55°F
Feels like (high)21°C / 70°F
Rainfall98 mm / 3.9 in🌧 rainy
Rainy days9 days
Humidity84%💦 very humid
Dew point13°C / 55°F
Sunshine7.1 h/day
Daylight10.9 h
Wind14 km/h / 9 mph
Air quality (US AQI)41🍃 good

Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.

Crowds in Curitiba in May

How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.

Shoulder seasonan ordinary month(estimated)

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Peak crowdsBusyShoulder seasonQuiet

Best months for Curitiba's weather

Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).

Fair weatherCuritiba's weather doesn't swing hard through the year — comfort stays fairly steady in every month.

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What's on in Curitiba in May

Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.

  • Hazard

    Winter fog at the airport

    15 May – 31 Aug · usuallyFog season

    Dense morning fog regularly shuts Afonso Pena airport for a few hours in the cold months, cancelling or diverting early flights; leave slack before a connection. Source ↗

What's on around the world in May →

Nearby, and something's on

Within 300 km of Curitiba — a day trip or a short hop — with something on this month. Never part of the comfort score.

Where is Curitiba?

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Curitiba in May — FAQ

Is May a good time to visit Curitiba?
May in Curitiba: nice, rainy, with clean air — an excellent time to visit. It ranks #6 of 12 months for Curitiba on SeasonMap's comfort score (82/100).
What is the weather like in Curitiba in May?
In May, Curitiba averages a daily high of 21.1°C and a low of 12.9°C, with about 98.3 mm of rain over roughly 9.2 rainy days.
What is the air quality in Curitiba in May?
Curitiba has a mean US Air Quality Index of about 41 in May.

Within 300 km: Florianópolis' Winter swell on the east coast around 1 Apr – 30 Sep.