About Rioja, San Martin Department

Rioja, in San Martin Department, Peru, is home to roughly 25,100 people in the America/Lima time zone at 6.1°S latitude.

Recent weather here gives a sense of typical conditions: in 2025, Rioja recorded a mean annual temperature of 71°F, ranging from 55°F lows in July to 91°F highs in December, with about 152 inches of precipitation across the year.