The best months to visit Northern Mariana Islands are February and March. See monthly temperatures, rainfall and rain days (1991–2020 averages) to plan your trip.
Average daytime high and monthly rainfall in Northern Mariana Islands: January 27°C / 62mm; February 27°C / 41mm; March 27°C / 38mm; April 28°C / 53mm; May 29°C / 69mm; June 29°C / 108mm; July 29°C / 223mm; August 28°C / 331mm; September 28°C / 294mm; October 27°C / 301mm; November 28°C / 134mm; December 29°C / 67mm.