WeatherJourney.com

Curitiba weather by month: averages, rainfall & climate trends

Up on the southern Brazilian plateau, Curitiba is one of the coolest, foggiest big cities in the country, a place of misty mornings, winter frosts and the rare dusting of snow. Curitiba weather by month: average temperatures, rainfall, records and how the climate has changed since 1940.

Today vs average

−1.0°Chigh near average

20° / 9°Today
21° / 14°Average
see today in detail →

How it's changed

+0.9°Caverage temperature, 2016–2025 vs 1940–1949average temperature vs 1940–491frost days a year now (2016–2025) · 0 in the 1940sfrost days a year · 0 in the 1940s8days above 30°C a year now (2016–2025) · 1 in the 1940sdays above 30°C · 1 in the 1940s+0.9°C vs the 1940s · see how it's changed →
Weather by montha typical year, averaged over the full recordJanuary, rain 206 mmhigh 25°low 17°February, rain 180 mmhigh 25°low 18°March, rain 142 mmhigh 24°low 17°April, rain 85 mmhigh 22°low 15°May, rain 90 mmhigh 19°low 12°June, rain 90 mmhigh 18°low 10°July, rain 84 mmhigh 18°low 10°August, rain 84 mmhigh 20°low 11°September, rain 127 mmhigh 20°low 12°October, rain 152 mmhigh 21°low 14°November, rain 130 mmhigh 23°low 15°December, rain 171 mmhigh 24°low 16°wettest month January, 206 mm · 1,543 mm a yearsee month by month →

Right now

What it's doing today vs the historical average for this date.
Partly cloudy

Right now

18.0°

16°feels like
40%humidity
4°dew point
8 km/hfrom W
UV index0.6
sunrise05:39sunset18:24day length12h 45m
TodayPartly cloudy20°9°
MonPartly cloudy21°8°
TuePartly cloudy21°10°
WedOvercast19°12°
ThuShowers18°13°
FriOvercast19°16°
SatOvercast23°18°

On this date: October 18

Today (forecast)
20° / 9°
Average for October 18
21° / 14°

High near average · −1.0°C

  • Record high: 29.9° · 1957
  • Record low: 7.8° · 1969
  • One year ago: 22° / 15°

Every October 18 in history, coldest to hottest

▲ Daily highs▼ Daily lows

Dots show daily highs (top) and lows (bottom) for each October 18 on record (n = 87). Outlined dots are today's forecast.

Area we sample

Each city's history comes from one ERA5 grid cell, about 28 km across, shown by the dashed box. Near mountains or coasts, conditions can vary across the cell.

Location & data

Historical weather for Curitiba is sampled from the ECMWF ERA5 reanalysis at 25.43°S, 49.27°W, with daily records since 1940.

Coordinates
25.43°S, 49.27°W
Time zone
America/Sao Paulo
Period
1940–2026
Data source
ERA5 (ECMWF)

Last 30 days

19 of the last 31 days were warmer than the historical average for that date. Average difference: +0.6°C.

Each bar is one day, from morning low to afternoon high. Warm-colored bars are days whose mean ran above average; cool bars ran below. The dot inside the bar is the daily mean. The shaded band is the typical 10–90% range expected for that date. Average = the day's mean temperature averaged across every year of record (1940–2026) for that calendar date.

This date over the years

One dot per year, showing the mean temperature on this calendar date. Dots are warmer or cooler than the long-term average (dashed line); the shaded band is the typical 10–90% range, and the highlighted dot is today's forecast. Based on ERA5 reanalysis: modelled estimates, not station readings.

Weather by month

Average temperatures and rainfall for each month: a typical year, from the full record.

Climate overview

Curitiba sits on a plateau in southern Brazil, more than 900 metres up in the state of Paraná. The altitude gives it a subtropical highland climate (Köppen Cfb) far cooler than the Brazilian norm: mild summers and cool winters, with night-time frosts possible in the cold months. The flat plateau drains slowly, and the lingering moisture has earned the city its nickname, the City of Eternal Fog.

Cold fronts pushing up from Antarctica and Argentina sweep through the year round, dragging extratropical storms and sharp frosts into the region in winter. Snow is rare but not unheard of, recorded in a scattering of years across more than a century, most recently in 2020. For Brazilians accustomed to heat, the grey, cool, damp character of Curitiba comes as a surprise.

February brings the year's peak warmth, with afternoons typically reaching 24.9°C and nights around 17.5°C. At the other extreme, July brings afternoon highs of about 18.1°C and typical overnight lows of 9.8°C.

The yearly total for Curitiba comes to about 1,543 mm; monthly amounts range from 84 mm in July up to 206 mm in January. A typical year brings rain or snow on around 145 days.

Over the full record (since 1940), the annual mean temperature in Curitiba has risen by 0.9°C between its first decade and its last. The count of days past 30°C has risen from roughly 1 a year to 8 between the record's first and last decades.

Sources:en.wikipedia.orgbritannica.comportal.inmet.gov.br

Climate graph (climograph)

February is the warmest month, July the coolest: a yearly swing of 7°C. Wettest month: January (~206 mm). Whole year averages ~1,543 mm of rain.

Bars = average monthly rainfall (right axis). Lines = average daily high and low (left axis). Average = each month's value averaged across every year of record (1940–2026).

Rainy days by month

About 145 rainy days a year: most in January (~20), fewest in July (~7).

Bars = average number of days with ≥ 2 mm per month. Hover for the monthly rainfall total.

Monthly wind

Average daily peak wind at 10 m, by month.

Monthly solar energy

Average daily incoming solar energy in megajoules per square metre: the record's own proxy for how sunny the month is.

Curitiba month by month: what to expect

Typical conditions for each month, averaged across the full record (since 1940). Daylight is the time from sunrise to sunset. Record high/low are the most extreme values in the ERA5 dataset (modelled since 1940), so they can differ from official weather-station readings.

MonthAvg highAvg lowRainRainy daysDaylightRecord highRecord low
January24.9°17.3°206 mm2013.4 h33.7° (2024)9.2° (1980)
February24.9°17.5°180 mm1912.9 h33.3° (2014)10.1° (1991)
March24.0°16.7°142 mm1612.2 h32.0° (2024)6.3° (1976)
April22.0°14.6°85 mm911.4 h31.0° (2016)1.7° (1971)
May19.5°11.9°90 mm710.8 h28.5° (1995)−0.5° (1968)
June18.3°10.4°90 mm710.4 h26.2° (1997)−2.0° (1994)
July18.1°9.8°84 mm710.6 h26.9° (1987)−5.8° (1975)
August19.6°10.6°84 mm711.1 h29.8° (2023)−2.5° (1991)
September20.4°11.9°127 mm1011.9 h32.4° (2012)−0.3° (1980)
October21.4°13.5°152 mm1312.6 h33.1° (2020)4.0° (1970)
November22.8°14.6°130 mm1313.3 h32.8° (2023)6.1° (1970)
December24.0°16.2°171 mm1713.6 h32.6° (2023)9.3° (1972)

How it's changed

Year-by-year signals from 1940 to today.

Climate stripes

Annual mean shifted from 1940–1949 to 2016–2025 by +0.9°C.

Each vertical stripe is one year. Color encodes how much that year's annual mean differed from the long-term average. Average = each year's annual mean compared to the average of all years (1940–2026). cooler ← → warmer

Annual mean temperature

Long-term trend: +0.15°C per decade.

One point per year, showing the temperature averaged across the whole year. The dashed line is the least-squares long-term trend. Based on ERA5 reanalysis: modelled estimates, not station readings.

Seasonal warming

Dec–Feb is warming fastest: +0.20°C per decade.

Each faint line is one three-month period's average per year; the bold dashed line is its long-term trend. Different parts of the year often warm at different rates. Based on ERA5 reanalysis: modelled estimates, not station readings.

Hot days vs frost days

Days ≥ 30°C per year: 0.9 early in the record → 8.1 recently. Frost days: 0 → 1.

Thin lines are raw yearly counts; thick lines are the smoothed trend that removes year-to-year noise. The hot-day threshold is auto-picked per city so the line actually moves. Average = a centered 5-year rolling average to smooth weather noise.

Yearly hot & cold extremes

All-time high in 2024, all-time low in 1975: 33.7°C / −5.8°C.

One point per year: the single hottest and coldest day recorded that year.

Annual rainfall

~1,543 mm/year on average. Last decade: −5% vs that average. Long-term trend: +13 mm per decade.

One bar per year of total rainfall. Dashed line is the long-term average. Average = the average annual rainfall across every year of record (1940–2026).

Day-by-day grid

Each tiny square is one calendar day across the full record, about 30,000 days per city. Use the mode switch above the chart: Anomaly colors each day by how far it ran from the historical average for that date (red = warmer, blue = cooler), Daily mean temp shows the absolute mean temperature for the day (useful to see seasons and heatwaves), and Precipitation shows daily rainfall (useful to spot wet/dry seasons and droughts). Average = the long-term average for that calendar date (1940–2026).

Frequently asked questions about Curitiba

Which is the warmest month in Curitiba?
On long-term average, the warmest month in Curitiba is February (mean daily temperature of about 20.5°C) and the coolest is July (about 13.3°C).
How does today's temperature in Curitiba compare to the historical average?
On October 18, 2026, Curitiba is forecast to reach a high of 20.2°C and a low of 8.6°C. The long-term average for this date (the full record since 1940) is a high of 21.2°C and a low of 13.6°C, so today's high is 1.0°C cooler than that average.
How much has Curitiba warmed since 1940?
Comparing the first decade of the record (1940–1949) with the most recent (2016–2025), the annual mean temperature in Curitiba is about 0.9°C warmer.
How much does it rain in Curitiba?
Curitiba receives about 1,543 mm of precipitation per year on long-term average, with January typically the wettest month.
What is the average temperature in Curitiba?
Over the full record (since 1940), the annual mean temperature in Curitiba is about 17.0°C. The warmest month is February and the coolest is July.
What are the average temperatures in Curitiba by month?
Average daily highs and lows for each month in Curitiba (°C, full record since 1940): January 25°/17°, February 25°/18°, March 24°/17°, April 22°/15°, May 19°/12°, June 18°/10°, July 18°/10°, August 20°/11°, September 20°/12°, October 21°/14°, November 23°/15°, December 24°/16°.
What is the weather like in Curitiba in summer?
In summer, December through February, Curitiba is wet and pleasantly warm. Daytime highs sit at 24–25°C and nights at 16–18°C; January is the warmest month. Rain falls on about 19 days a month, adding up to around 186 mm. It is the wettest season of the year.
What is the weather like in Curitiba in winter?
In winter, June through August, Curitiba is mild. Afternoons run 18–20°C and nights 10–11°C; July is the coldest month. Rain is steady at around 86 mm a month, spread over roughly 7 days. It is the driest season of the year.
What is the weather like in Curitiba in spring?
Spring in Curitiba (September to November) is wet and mild. Expect 20–23°C by day and 12–15°C at night, with November the warmest month. Rain falls on about 12 days a month, adding up to around 136 mm.
What is the weather like in Curitiba in autumn?
March to May is autumn in Curitiba, and it is wet and mild. March is still 24°C by day and 17°C at night; by May it is down to 19°C and 12°C. Rain falls off from 142 mm on 16 days in March to 90 mm on 7 days in May.
How many days a year does it rain in Curitiba?
On long-term average, Curitiba has about 145 days a year with at least 2 mm of rain or snow. The annual total is roughly 1,543 mm.

Weather in nearby cities