Weather forecast for 10 daysCastanhal, Brazil

Weather forecast for the weekend

Saturday 24. Oct 2026

  • 34°C
  • 24°C
PM Showers
PM Showers
  • Precip. probability: 34%
  • Precipitation: 1mm
  • Wind: 20km/hNE 49°
  • Humidity: 65%
  • UV index: 11
  • Sunrise: 05:51 -03
  • Sunset: 18:00 -03
  • ▼
Tomorrow, expect afternoon showers to move through periodically.
Minimal precipitation is predicted. The temperature is forecasted to vary between a maximum of a tropical 34°C and a minimum of a warm 24°C.
The maximum heat index, which factors the actual air temperature with the relative humidity, is estimated at a torridly hot 44°C. Note that heat index values are valued for light wind and location in the shade. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Tomorrow, the maximum temperature is forecasted to be in line with the typical October high of 33.5°C.
Sunrise will be at 05:51 and sunset at 18:00; tomorrow's daylight will last for 12h and 9min.

Sunday 25. Oct 2026

  • 35°C
  • 24°C
PM Showers
PM Showers
  • Precip. probability: 36%
  • Precipitation: 1mm
  • Wind: 20km/hNE 48°
  • Humidity: 61%
  • UV index: 11
  • Sunrise: 05:51 -03
  • Sunset: 18:00 -03
  • ▼
On Sunday, 25th of October, showers may develop as the afternoon progresses.
Minimal precipitation is expected. The temperature is predicted to vary between a torrid 35°C and a warm 24°C.
The temperature will be in line with October's average maximum of 33.5°C.
Sunrise will be at 05:51 and sunset at 18:00; the daylight will last for 12h and 9min.

10-day overview

Daily temperatures

Maximum temperature: 36°C.
Coldest day: tomorrow 34°C.

Chance of precipitation

Highest chance: Sunday 36%.

Long-term weather forecast

  • Friday
  • 23. Oct 2026
  • 35°C
  • 24°C
Partly Cloudy
Partly Cloudy
  • Precip. probability: 8%
  • Precipitation: 0mm
  • Wind: 15km/hNNE 29°
  • Humidity: 57%
  • UV index: 10
  • Sunrise: 05:51 -03
  • Sunset: 18:00 -03
  • ▼
  • Saturday
  • 24. Oct 2026
  • 34°C
  • 24°C
PM Showers
PM Showers
  • Precip. probability: 34%
  • Precipitation: 1mm
  • Wind: 20km/hNE 49°
  • Humidity: 65%
  • UV index: 11
  • Sunrise: 05:51 -03
  • Sunset: 18:00 -03
  • ▼
  • Sunday
  • 25. Oct 2026
  • 35°C
  • 24°C
PM Showers
PM Showers
  • Precip. probability: 36%
  • Precipitation: 1mm
  • Wind: 20km/hNE 48°
  • Humidity: 61%
  • UV index: 11
  • Sunrise: 05:51 -03
  • Sunset: 18:00 -03
  • ▼
  • Monday
  • 26. Oct 2026
  • 36°C
  • 24°C
Partly Cloudy
Partly Cloudy
  • Precip. probability: 8%
  • Precipitation: 0mm
  • Wind: 18km/hNE 39°
  • Humidity: 58%
  • UV index: 11
  • Sunrise: 05:50 -03
  • Sunset: 18:00 -03
  • ▼
  • Tuesday
  • 27. Oct 2026
  • 36°C
  • 24°C
Partly Cloudy
Partly Cloudy
  • Precip. probability: 10%
  • Precipitation: 0mm
  • Wind: 16km/hNE 39°
  • Humidity: 58%
  • UV index: 11
  • Sunrise: 05:50 -03
  • Sunset: 18:00 -03
  • ▼
  • Wednesday
  • 28. Oct 2026
  • 36°C
  • 24°C
Mostly Sunny
Mostly Sunny
  • Precip. probability: 10%
  • Precipitation: 0mm
  • Wind: 15km/hNE 51°
  • Humidity: 59%
  • UV index: 11
  • Sunrise: 05:50 -03
  • Sunset: 18:00 -03
  • ▼
  • Thursday
  • 29. Oct 2026
  • 35°C
  • 24°C
Mostly Sunny
Mostly Sunny
  • Precip. probability: 14%
  • Precipitation: 0mm
  • Wind: 17km/hENE 60°
  • Humidity: 60%
  • UV index: 11
  • Sunrise: 05:50 -03
  • Sunset: 18:00 -03
  • ▼
  • Friday
  • 30. Oct 2026
  • 35°C
  • 24°C
Mostly Sunny
Mostly Sunny
  • Precip. probability: 8%
  • Precipitation: 0mm
  • Wind: 17km/hNE 53°
  • Humidity: 59%
  • UV index: 11
  • Sunrise: 05:50 -03
  • Sunset: 18:00 -03
  • ▼
  • Saturday
  • 31. Oct 2026
  • 36°C
  • 24°C
Partly Cloudy
Partly Cloudy
  • Precip. probability: 3%
  • Precipitation: 0mm
  • Wind: 16km/hNE 50°
  • Humidity: 57%
  • UV index: 11
  • Sunrise: 05:50 -03
  • Sunset: 18:00 -03
  • ▼
  • Sunday
  • 1. Nov 2026
  • 36°C
  • 24°C
Partly Cloudy
Partly Cloudy
  • Precip. probability: 13%
  • Precipitation: 0mm
  • Wind: 17km/hNE 50°
  • Humidity: 57%
  • UV index: 11
  • Sunrise: 05:50 -03
  • Sunset: 18:00 -03
  • ▼
During the ten-day period, gloomy, dry and sunny and damp weather is forecasted.
With minimal precipitation of 1mm, rainfall is forecasted for Saturday and Sunday.
The maximum temperature will be very similar during the next few days. Maximum temperatures will fall between 34°C and 36°C, while the low will not vary, staying at 24°C.
The hottest days will be Monday through Wednesday, next Saturday and Sunday, with a maximum of 36°C; expect the coldest day on Saturday with a high of 34°C.
Combining with the humidity, the maximum feel-like temperature may increase significantly and range between a torridly hot 44°C and a searing 48°C.
October and November, with an average high-temperature of 33.5°C, are the warmest months in Castanhal.
Updated: Oct 23, 2026 @ 17:34:28 UTC
Published by: Weather Atlas | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate

Frequently asked questions

In Castanhal, a combination of cloud-filled, sunny and rain-soaked weather is forecasted for the next ten days.

With minimal precipitation of 1mm, rainfall is forecasted for Saturday and Sunday in Castanhal.

The maximum temperature will vary between 34°C and 36°C, while the minimum temperature will remain unchanged at 24°C.
Combining with the humidity, the maximum feel-like temperature will vary between 44°C and 48°C.

With a maximum temperature of 36°C, Monday through Wednesday, next Saturday and Sunday will be the hottest days. Tomorrow will be the coldest day, with a maximum temperature of 34°C.

On Saturday, expect brief rain showers to develop during the afternoon.

Tomorrow, there is a low probability of minimal rainfall in Castanhal.

Tomorrow, the maximum temperature will be 34°C, while the minimum temperature will be 24°C. The maximum heat index, which adjusts the air temperature based on humidity, is appraised at 44°C.
Tomorrow, the maximum temperature will be in line with the average highest temperature in October. The lowest temperature will be also in line with the average low of 22.4°C.

On Saturday, in Castanhal, sunrise will be at 05:51 and sunset at 18:00 (-03).

In Castanhal, the length of the day tomorrow will be 12h and 9min.

On Sunday, expect afternoon showers, though they should remain light and brief.

On Sunday, there is a low chance of minimal precipitation in Castanhal.

On Sunday, the highest temperature will be 35°C, while the lowest temperature will be 24°C.