Santa Catarina thaws out and gets rainy this Wednesday with temperatures up to 24°C, but those who wait until Friday will have sun and heat of almost 30°C on the Labor Day holiday.

Written by Bruno Teles

Published on 29/04/2026 at 13:37

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Santa Catarina faces a rainy Wednesday with temperatures up to 24°C as heavy clouds from Paraná hit the North, Itajaí Valley, and coast, but starting Thursday the sun gradually returns and on Friday, Labor Day, the heat may reach 30°C in various regions of the state.

Santa Catarina swapped the freezer for rain in less than 24 hours, and those who dressed to face Tuesday’s negative temperatures now need to swap their coat for an umbrella this Wednesday. The state faces a day of unstable weather with predominant rain in regions closer to Paraná, especially in northern Santa Catarina, the Northern Plateau, and the Itajaí Valley, where heavy clouds advancing from the neighboring state keep the sky overcast and precipitation constant throughout the day. Highs do not exceed 24°C in Joinville, Florianópolis, and Blumenau, and Lages does not surpass 20°C, making this Wednesday the last day of discomfort before improvement begins to take shape starting tomorrow.

The good news for those planning the long weekend is that the rain has a short expiration date. Starting Thursday, the heavier clouds gradually move away and the sun reappears between openings that gain space throughout the day, with afternoon temperatures rising to the range of 27°C to 28°C in cities like Joinville, Itajaí, Florianópolis, and Blumenau. On Friday, Labor Day, the heat intensifies and thermometers may reach 30°C in various regions, a return to the typical autumn days that Santa Catarina experienced before the polar outbreak that froze the Serra on Tuesday.

Why the rain hits the North and Itajaí Valley more this Wednesday

The uneven distribution of rain across the state has a direct meteorological explanation. The heavy clouds causing Wednesday’s instability form over Paraná and move southward, first hitting the Santa Catarina regions closest to the state border: North, Northern Plateau, and the strip that includes the Itajaí Valley and the northern portion of the coast. The farther from Paraná and closer to Rio Grande do Sul, the less intense the rain and the greater the chance of sunshine during the day.

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What to expect from Thursday when the rain starts to go away

Thursday marks the beginning of the transition to stable weather that will benefit the long weekend. The heavy clouds dominating the sky this Wednesday progressively move away, and even if there are still moments of cloudiness in the morning, the sun gains space in the afternoon and temperatures rise to levels reminiscent of the days before the cold wave. Joinville may reach 28°C, Itajaí and Florianópolis also reach this mark, Blumenau records highs of 27°C, and Chapecó reaches 27°C in the West, indicating that the midweek rain is behind us.

Thursday’s lows will still be cool, especially in the Serra, South, and West. The nights maintain the autumnal pattern of cooler temperatures followed by pleasant afternoons, an alternation that is the hallmark of the season in Santa Catarina. Those leaving home early on Thursday will need a coat, but those waiting for the afternoon will find t-shirt conditions that contrast with the rain and cold of previous days.

What Friday, Labor Day, will be like in Santa Catarina

Friday, Labor Day, promises to be the best day of the week for outdoor activities. The sun predominates between clouds throughout the state, rain is not part of the forecast, and afternoon temperatures may reach the 30°C range in various regions, making the holiday an opportunity for those who want to enjoy beaches, trails, or simply leave home without worrying about unexpected storms or cold. After a week that started with negative temperatures and frost in the Serra and continued with rain and instability, Friday’s heat serves as a reward for those who endured the discomfort.

For those planning the long holiday weekend, attention should turn to Saturday. A cold front advancing from Rio Grande do Sul could bring rain again during the weekend, and the most likely day for precipitation is precisely Saturday, when instability may return to parts of the state. Friday, however, remains protected from this system and offers a window of good weather worth enjoying before the next change arrives.

Forecast Summary: From Wednesday’s Rain to Friday’s Heat in Santa Catarina

The week in Santa Catarina is summarized by a rapid transition between extremes. Wednesday will see rain and overcast skies with highs of 20°C to 24°C, Thursday brings a gradual return of the sun with afternoons reaching 27°C to 28°C, and Friday delivers the best scenario with predominant sunshine and temperatures that could hit 30°C. For those living in regions where Wednesday’s rain is more intense, the advice is to be patient: these are the last hours of discomfort before a holiday that offers everything a catarinense needs to enjoy.

The oscillation between extreme cold, rain, and heat in less than a week is a true portrait of autumn in Santa Catarina. The transitional season respects no preferences: it delivers frost one morning and nearly 30°C heat three days later, and anyone living in the state already knows that their wardrobe needs to be prepared for everything at once. The Labor Day holiday arrives with the promise of a climatic truce that deserves to be enjoyed.

And you, do you already have plans for the long holiday weekend? Did Wednesday’s rain change any of your plans? Leave your opinion in the comments.

Santa Catarina thaws out and gets rainy this Wednesday with temperatures up to 24°C, but those who wait until Friday will have sun and heat of almost 30°C on the Labor Day holiday.

Santa Catarina faces a rainy Wednesday with temperatures up to 24°C as heavy clouds from Paraná hit the North, Itajaí Valley, and coast, but starting Thursday the sun gradually returns and on Friday, Labor Day, the heat may reach 30°C in various regions of the state.

Why the rain hits the North and Itajaí Valley more this Wednesday

What to expect from Thursday when the rain starts to go away

What Friday, Labor Day, will be like in Santa Catarina

Forecast Summary: From Wednesday’s Rain to Friday’s Heat in Santa Catarina

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