Mariana Islands Weather, Climate and Best Time to Visit
Data source:Meteostat Update date:2025-09
Mariana Islands year round climate
Spring (March–May): Average 80–82°F, warm and humid climate, rainfall gradually increases, with the most rainfall in May. Common activities: Diving, snorkeling, beach relaxation. Recommended clothing: Light and breathable short-sleeved clothing, shorts, swimwear, and a light sun-protective jacket.
Summer (June–August): Average 81–82°F, hot and humid, with significant rainfall. Common activities: Water activities, viewing tropical plants, island exploration. Recommended clothing: Light and breathable cotton clothing, shorts, sandals, sunscreen, and rain gear.
Autumn (September–November): Average 81–82°F, warm and humid climate, with the most rainfall in September, gradually decreasing in October and November. Common activities: Diving, snorkeling, whale watching (depending on the season and species). Recommended clothing: Light and breathable clothing, and a light jacket for occasional rain.
Winter (December–February): Average 80–81°F, warm and comfortable climate, with relatively less rainfall. Common activities: Diving, snorkeling, sightseeing. Recommended clothing: Light and breathable clothing, but a light jacket may be needed at night.
Mariana Islands climatological average
Annual average temperature: approx. 80.6°F / Annual rainfall: approx. 2758 mm / Summer humidity: 75%–85% / Rainiest month: September
Mariana Islands monthly average temperature and precipitation
Month
Air temperature (°F)
Precipitation (mm)
January
80.1°F
188.3
February
80.2°F
75.3
March
80.8°F
79.3
April
81.7°F
143
May
82.4°F
316
June
82.2°F
185.7
July
81.7°F
253.3
August
81.5°F
368.3
September
81.7°F
428.3
October
81.1°F
405.3
November
82°F
155
December
81.5°F
161
Mariana Islands weather for the next seven days
12/4
Thursday
Patchy rain nearby
83.8°F/81.9°F
12/5
Friday
Heavy rain
82.3°F/80.1°F
12/6
Saturday
Patchy rain nearby
83.5°F/80.3°F
12/7
Sunday
Patchy rain nearby
83°F/80°F
12/8
Monday
Patchy rain nearby
83.2°F/79.9°F
12/9
Tuesday
Patchy rain nearby
83.3°F/80.2°F
12/10
Wednesday
Patchy rain nearby
82.9°F/78.9°F
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