Grand Roy, in Saint John Parish, GD, is home to roughly 2,400 people in the America/Grenada time zone at 12.1°N latitude.
In 2025, Grand Roy averaged an annual temperature of 81°F, with hottest temperatures reaching 90°F in September and lowest around 72°F in February. The city received approximately 45 inches of precipitation during the year.
View historical weather for Grand Roy · More cities in Saint John Parish