With a population of around 50,000, Monsanto sits in Santarem, Portugal. The city operates in the Europe/Lisbon time zone.
In 2025, Monsanto averaged an annual temperature of 62°F, with hottest temperatures reaching 104°F in June and lowest around 37°F in December. The city received approximately 53 inches of precipitation during the year.
View historical weather for Monsanto · More cities in Santarem