Castanhal Weather & Climate: Best Time to Visit

In Castanhal temperatures are generally consistent throughout the year. Average maximum daytime temperatures range from a very warm 35°C (95°F) in October, the warmest time of the year, to a very warm 31°C (88°F) during cooler months like July.

At night, you can expect temperatures ranging from 24°C (75°F) in October to around 23°C (73°F) during July.

Check out our detailed temperature page for more information.

Temperature ranges by month

Castanhal experiences significant rainfall throughout the year, averaging 2271 mm (89 in) of precipitation annually. Significant seasonal changes in precipitation occur throughout the year. In the wettest month, March it receives heavy rainfall, averaging 433 mm (17 in) of precipitation, recorded across 31 rainy days. In contrast, the driest month October brings less rainfall, with 35 mm (1.4 in) over 21 rainy days. For more details, please visit our Castanhal Precipitation page.

The mean monthly precipitation over the year, including rain, hail, and snow

The average number of days each month with precipitation

Seasonal changes in sunshine hours are quite dramatic in Castanhal. While August receives considerable daily sunshine with up to 9.0 hours, February marks the darkest time of the year, where sunshine is scarce with only 3.4 hours of sunlight per day.

Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Daily hours of sunshine

The city experiences its highest humidity in February, reaching 90%. In October, the humidity drops to its lowest level at 80%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year