Riachos, in Santarem, Portugal, is home to roughly 5,500 people in the Europe/Lisbon time zone at 39.4°N latitude.
In 2025, Riachos averaged an annual temperature of 63°F, with hottest temperatures reaching 107°F in June and lowest around 30°F in January. The city received approximately 39 inches of precipitation during the year.
View historical weather for Riachos · More cities in Santarem