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Park climate1991–2020 climate normals0 m source elevationNASA POWER

Twelve-month average atmospheric analysis for the Henderson Island representative coordinate

Henderson Island Monthly Climate Normals, Temperature, and Precipitation Data Profiles

Review long-term climate normals for Henderson Island, including monthly mean temperature, precipitation rates, relative humidity, wind speed, and daylight hours. Derived from NASA POWER measurements between 1991 and 2020, these records provide a structured baseline for understanding atmospheric patterns at this specific geographic point. Data reflects stable monthly averages rather than current weather conditions, forecasts, or whole-park climate variations.

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A stylized vector illustration of a tropical coral atoll coastline featuring steep cliffs, lush palm trees, and turquoise ocean waves.
Annual climate pattern

Long-term thermal ranges and average daily precipitation rates across twelve months

Henderson Island Annual Climate Normals: Monthly Temperature and Precipitation Patterns

Average monthly temperatures on Henderson Island shift smoothly from warmer peaks around 26.8 degrees Celsius early in the year to cooler averages near 21.2 degrees Celsius around September, based on NASA Power climatology records from 1991 to 2020. Average daily precipitation rates accompany this annual thermal cycle with consistent monthly variations measured at a single representative coordinate.
Mean temperatureAverage minimum–maximum rangePrecipitation
Temperature (°C)PrecipitationUp to 4.6 mm/day15°20°25°30°25°26°26°25°24°23°22°21°21°22°23°24°0123453.63.72.63.93.13.52.82.72.94.33.34.6JanFebMarAprMayJunJulAugSepOctNovDec
Annual mean
23.3 °C
Warmest month
March
Coolest month
September
Wettest month
December
Twelve-month climate

Compare monthly temperature bounds, daily precipitation rates, and atmospheric humidity across the calendar year.

Henderson Island Weather by Month: Complete Twelve-Month Climate Record

Analyze long-term temperature ranges alongside average daily precipitation and relative humidity for every month at a representative coordinate. Reviewing these twelve distinct intervals reveals shifts in wind speed and calculated daylight without relying on simplified annual summaries.
Mean temperaturePrecipitationHumidityWind speedDaylight
January24.9 °C23.2° to 26.2°3.6 mm/day80.1%5.7 m/s13.3 hours
February25.5 °C23.9° to 26.7°3.7 mm/day79.7%5.7 m/s12.8 hours
March25.6 °C24° to 26.8°2.6 mm/day79.1%5.5 m/s12.1 hours
April24.8 °C22.8° to 26.4°3.9 mm/day78.6%6 m/s11.4 hours
May23.6 °C21.4° to 25.4°3.1 mm/day77.2%6.2 m/s10.8 hours
June22.6 °C19.9° to 24.5°3.5 mm/day77.7%6.6 m/s10.5 hours
July21.6 °C19.2° to 23.7°2.8 mm/day77.5%6.8 m/s10.7 hours
August21.3 °C18.7° to 23.1°2.7 mm/day77.8%6.7 m/s11.2 hours
September21.2 °C18.8° to 23°2.9 mm/day78.5%6.4 m/s11.9 hours
October21.8 °C19.6° to 23.7°4.3 mm/day80.2%6.3 m/s12.6 hours
November22.8 °C20.7° to 24.3°3.3 mm/day80.7%6.1 m/s13.2 hours
December24 °C22.1° to 25.4°4.6 mm/day81.2%5.9 m/s13.5 hours
Calculated climate highlights

Comparative monthly averages across long-term climatology normals for the protected island

Henderson Island Climate Highlights: Calculated Monthly Temperature, Precipitation, and Wind Contrasts

Calculated monthly climate highlights summarize long-term temperature, precipitation, humidity, wind, and daylight averages across the sampled coordinate. These comparative peaks reflect baseline monthly normals rather than individual weather extremes or uniform regional conditions.
Warmest month
March25.6 °C
Coolest month
September21.2 °C
Wettest month
December4.6 mm/day
Driest month
March2.6 mm/day
Most humid month
December81.2%
Windiest month
July6.8 m/s
Longest daylight
December13.5 hours

Interactive climate map

Compare National Park Climate Data Through an Interactive Global Map

Visit the MoriAtlas climate map to compare long-term monthly temperature and precipitation metrics across national parks. This visual interface helps you understand seasonal variations at specific protected area coordinates to deepen your knowledge of global park geography and environmental characteristics.

Global National Park Climate Map
Other park climates

Trace monthly temperature and precipitation patterns across diverse protected landscapes

Compare Henderson Island Climate Normals With Other Protected Areas

Examine long-term monthly temperature normals, precipitation rhythms, humidity, wind, and daylight metrics across different protected landscapes. Standardized multi-year records reveal meaningful atmospheric contrast and geographic variation beyond Henderson Island.
MoriAtlas Explorer

Explore the Geography and Protected Status of Henderson Island

Trace the boundaries and unique limestone terrain of Henderson Island through detailed geographic mapping. Access this MoriAtlas profile to understand the ecological importance of this raised coral atoll and its context within the wider Pitcairn Islands oceanic region.

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Henderson Island Protected Area

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