Northern Mariana Islands Historical Weather Data & Climate
Historical Climate Data for 3 Cities • 1981–2025
°F / °C
Northern Mariana Islands Climate Overview
Northern Mariana Islands has an average annual temperature of
82°F
(across all 3 cities) with approximately
1364 mm of annual precipitation
and average humidity of 80%.
The warmest city is Tinian
with average July highs of 85.3°F,
while Tinian
is the coldest with average January lows of 78.4°F.
This page covers 45 years of NASA POWER climate data (1981–2025)
including temperature, rainfall, humidity, wind speed, and solar radiation.
Jul is typically the warmest month across Northern Mariana Islands with average highs around
85.3°F, while
Feb is the coldest with average lows near
77.9°F.
Aug is the wettest month with approximately
276 mm of rainfall on average.
This chart shows how Northern Mariana Islands's average temperatures have shifted across 45 years.
Use the range buttons to focus on recent decades or view the full historical record.
Data is averaged across all 3 cities in the state.
🌧️ Annual Precipitation Trend
State-wide avg annual precipitation · Last 10 years · mm/year
🔗 Explore Cities in Northern Mariana Islands
Browse detailed weather history, monthly averages, and 45-year climate trends for every city in Northern Mariana Islands.
Which city in Northern Mariana Islands gets the most rain?▼
Rota is the wettest city in Northern Mariana Islands with approximately 1463 mm of annual precipitation on average. View Rota weather history →
What is the warmest month in Northern Mariana Islands?▼
Jul is the warmest month across Northern Mariana Islands, with state-wide average highs of 85.3°F and average lows of 80.6°F.
How many cities in Northern Mariana Islands have weather data?▼
TownPillar has historical weather data for 3 cities in Northern Mariana Islands, covering 45 years of NASA POWER climate records from 1981 to 2025.
Which month has the most sunshine in Northern Mariana Islands?▼
May is the sunniest month across Northern Mariana Islands with an average solar radiation of 6.90 kWh/m²/day state-wide. This solar radiation data from NASA POWER is useful for solar energy planning, agriculture, and understanding seasonal sunshine availability.
Where does this climate data come from?▼
All data is sourced from NASA POWER (Prediction Of Worldwide Energy Resources), based on MERRA-2 satellite reanalysis data. It includes monthly temperature, precipitation, humidity, wind speed, and solar radiation at 0.5° × 0.625° spatial resolution.
📚 Data Source
All weather data is sourced from NASA POWER (Prediction of Worldwide Energy Resources). Data covers 45 years (1981–2025) across 3 cities in Northern Mariana Islands at monthly temporal resolution.