Climate Overview
The climate in Caldas de Reis is temperate. The average annual temperature is 14°C and approximately 1365mm of precipitation falls per year. October is the wettest month, receiving around 185mm of rainfall. Caldas de Reis is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: August, July, September. The coldest months are January, February, March, when temperatures can drop to 5°C.
Temperature
Caldas de Reis sees moderate temperature variation throughout the year, ranging from 5°C to 25°C. August is the warmest month, though highs remain moderate at 25°C with a mean of 19°C. January is the coolest month, with minimum temperatures around 5°C and an average of 8°C. Daily temperature variation is modest, with an average difference of 8°C between highs and lows. The sharpest temperature change occurs between October and November, with a 4°C shift in average temperatures.
Precipitation
Caldas de Reis is a fairly wet location, receiving approximately 1365mm of precipitation annually, which averages out to around 114mm per month. The wettest month is October, averaging 185mm of rainfall. December and January also tend to see above-average precipitation. The driest month is July, with just 19mm. That's 166mm less than October, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic.
Wind
Caldas de Reis is mildly breezy, with an average annual wind speed of 18km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is March, averaging 20km/h, noticeable enough to affect lighter outdoor activities. The calmest conditions occur in September, with average winds dropping to 16km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 4km/h between the calmest and windiest months.
Seasons
89 days until Summer
It is currently spring in Caldas de Reis, which began on March 20, 2026. Caldas de Reis is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in August at around 25°C, while the coldest stretch bottoms out in January near 5°C. Summer is next, beginning on June 21, 2026 — 89 days from now.
Spring
Temperatures range from 6 to 19°C. Rainfall is heavy, totalling around 366mm across the season with a monthly average of 122mm. Winds are moderate at around 19km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 13 to 25°C. Rainfall is relatively light, with around 127mm over the season and a monthly average of 42mm. Winds are moderate at around 17km/h. Comfortable clothing with a light layer for cooler evenings is all you need.
Autumn
Temperatures range from 8 to 22°C. Rainfall is heavy, totalling around 421mm across the season with a monthly average of 140mm. Winds are moderate at around 17km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from 5 to 13°C. Rainfall is heavy, totalling around 451mm across the season with a monthly average of 150mm. Winds are moderate at around 19km/h. A light jacket or sweater is usually sufficient, though cooler evenings may call for an extra layer.
Best Time to Visit
The best time to visit Caldas de Reis is during June, July, August and September, when the weather is most comfortable for travellers. During these months, average temperatures hover around 18°C with modest rainfall averaging 52mm per month. By contrast, January can be quite cold with temperatures dropping to 5°C. A light rain jacket is recommended, though showers are generally brief and shouldn't disrupt your plans.
Monthly Climate Data
The table below shows monthly climate averages for Caldas de Reis based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.
