Weather forecast for tomorrowArco-Íris, Brazil

Weather forecast for tomorrow

Saturday 24. Oct 2026

  • 34°C
  • 21°C
AM Clouds / PM Sun
AM Clouds / PM Sun
  • Precip. probability: 24%
  • Precipitation: 6mm
  • Wind: 22km/hNW 323°
  • Humidity: 60%
  • UV index: 10
  • Sunrise: 05:42 -03
  • Sunset: 18:29 -03
  • ▼
Tomorrow, on Saturday, expect clouds to linger through the morning before sunshine takes over in the afternoon.
The chance of rainfall is low, and light precipitation is expected. The temperature variation is forecasted to range from a maximum of a tropical 34°C to a minimum of a pleasant 21°C.
The maximum heat index, which represents the influence of relative humidity on air temperature, is estimated at a torridly hot 42°C. Note that heat index values are valued for light wind and location in the shade. Bear in mind that direct sunshine exposure increases weather impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees.
The day’s highest temperature is forecasted to be a few degrees higher than the standard October average of 30.8°C.
Sunrise will be at 05:42 and sunset at 18:29; tomorrow's daylight will last for 12h and 46min.

Hourly overview

Hourly temperatures

Warmest hour: 15h 36°C.
Coldest period: 3h - 6h 23°C.

Chance of precipitation

Highest chance: 18h 45%.

Hourly weather forecast

  • 0h
  • 23°C
  • Feels like:
    24°C
Mostly Cloudy
Mostly Cloudy
  • Precip. probability: 15%
  • Precipitation: 0mm
  • Wind: 12km/hNE 48°
  • Humidity: 86%
  • Pressure: 1010mbar
  • Visibility: 16km
  • UV index: 0
  • ▼
  • 2h
  • 22°C
  • Feels like:
    23°C
Mostly Cloudy
Mostly Cloudy
  • Precip. probability: 15%
  • Precipitation: 0mm
  • Wind: 10km/hNNE 32°
  • Humidity: 89%
  • Pressure: 1008mbar
  • Visibility: 16km
  • UV index: 0
  • ▼
  • 4h
  • 22°C
  • Feels like:
    23°C
Mostly Cloudy
Mostly Cloudy
  • Precip. probability: 17%
  • Precipitation: 0mm
  • Wind: 11km/hNNE 17°
  • Humidity: 90%
  • Pressure: 1008mbar
  • Visibility: 16km
  • UV index: 0
  • ▼
Sunrise: 05:42
  • 6h
  • 22°C
  • Feels like:
    23°C
Mostly Cloudy
Mostly Cloudy
  • Precip. probability: 13%
  • Precipitation: 0mm
  • Wind: 9km/hNNE 17°
  • Humidity: 88%
  • Pressure: 1008mbar
  • Visibility: 16km
  • UV index: 0
  • ▼
  • 8h
  • 25°C
  • Feels like:
    27°C
Cloudy
Cloudy
  • Precip. probability: 6%
  • Precipitation: 0mm
  • Wind: 12km/hN 5°
  • Humidity: 78%
  • Pressure: 1010mbar
  • Visibility: 16km
  • UV index: 1
  • ▼
  • 10h
  • 28°C
  • Feels like:
    30°C
Cloudy
Cloudy
  • Precip. probability: 4%
  • Precipitation: 0mm
  • Wind: 17km/hNNW 340°
  • Humidity: 69%
  • Pressure: 1009mbar
  • Visibility: 16km
  • UV index: 4
  • ▼
  • 12h
  • 31°C
  • Feels like:
    34°C
Mostly Cloudy
Mostly Cloudy
  • Precip. probability: 3%
  • Precipitation: 0mm
  • Wind: 20km/hNW 315°
  • Humidity: 56%
  • Pressure: 1008mbar
  • Visibility: 16km
  • UV index: 10
  • ▼
  • 14h
  • 33°C
  • Feels like:
    36°C
Partly Cloudy
Partly Cloudy
  • Precip. probability: 14%
  • Precipitation: 0mm
  • Wind: 22km/hWNW 302°
  • Humidity: 48%
  • Pressure: 1005mbar
  • Visibility: 16km
  • UV index: 9
  • ▼
  • 16h
  • 33°C
  • Feels like:
    36°C
Partly Cloudy
Partly Cloudy
  • Precip. probability: 3%
  • Precipitation: 0mm
  • Wind: 21km/hWNW 297°
  • Humidity: 46%
  • Pressure: 1003mbar
  • Visibility: 16km
  • UV index: 3
  • ▼
  • 18h
  • 31°C
  • Feels like:
    34°C
Scattered Thunderstorms
Scattered Thunderstorms
  • Precip. probability: 45%
  • Precipitation: 1mm
  • Wind: 15km/hNW 305°
  • Humidity: 55%
  • Pressure: 1003mbar
  • Visibility: 11km
  • UV index: 0
  • ▼
Sunset: 18:29
  • 20h
  • 27°C
  • Feels like:
    30°C
Mostly Cloudy
Mostly Cloudy
  • Precip. probability: 24%
  • Precipitation: 0mm
  • Wind: 11km/hNNE 27°
  • Humidity: 68%
  • Pressure: 1005mbar
  • Visibility: 16km
  • UV index: 0
  • ▼
  • 22h
  • 25°C
  • Feels like:
    28°C
Cloudy
Cloudy
  • Precip. probability: 24%
  • Precipitation: 0mm
  • Wind: 9km/hNNE 22°
  • Humidity: 75%
  • Pressure: 1005mbar
  • Visibility: 16km
  • UV index: 0
  • ▼
Tomorrow, primarily overcast and occasionally storm-filled weather is expected.
Rainfall is predicted at 18h, 19h and 23h. With light precipitation of 2mm, most rainfall is expected at 23h.
The temperature will be between the lowest temperature of 22°C and the highest temperature of 33°C. The hottest part of the day will be from 14h to 16h.
The high will be a couple of degrees higher than the normal maximum of 30.8°C for October. Tomorrow, the lowest temperature will be also comparable to October's usual minimum.
October is the warmest month in Arco-Íris, with an average high of 30.8°C and a low of 19.4°C.
Updated: Oct 23, 2026 @ 05:04:14 UTC
Published by: Weather Atlas | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate

Frequently asked questions

Tomorrow, early clouds will give way to sunshine in the afternoon.

With a probability of 24%, light precipitation of 6mm is predicted.

Tomorrow, the highest temperature will be 34°C, while the lowest temperature will be 21°C. The maximum heat index, which represents the influence of relative humidity on air temperature, is estimated at 42°C.
Tomorrow, the highest temperature will be slightly warmer than the average maximum temperature in October. The lowest temperature tomorrow will be in line with the average low temperature.

On Saturday, in Arco-Íris, sunrise will be at 05:42 and sunset at 18:29 (-03).

In Arco-Íris, the length of the day tomorrow will be 12h and 46min.