Park climate1991–2020 climate normals0 m source elevationNASA POWER

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

Henderson Island: monthly climate

Name: Henderson Island monthly climate normals
Creator: NASA POWER

At the representative location for Henderson Island, monthly mean temperatures range from 21.2 to 25.6 °C (1991–2020). Compare precipitation, humidity, wind, and daylight for each month.

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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

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 temperature	Precipitation	Humidity	Wind speed	Daylight
January	24.9 °C23.2° to 26.2°	3.6 mm/day	80.1%	5.7 m/s	13.3 hours
February	25.5 °C23.9° to 26.7°	3.7 mm/day	79.7%	5.7 m/s	12.8 hours
March	25.6 °C24° to 26.8°	2.6 mm/day	79.1%	5.5 m/s	12.1 hours
April	24.8 °C22.8° to 26.4°	3.9 mm/day	78.6%	6 m/s	11.4 hours
May	23.6 °C21.4° to 25.4°	3.1 mm/day	77.2%	6.2 m/s	10.8 hours
June	22.6 °C19.9° to 24.5°	3.5 mm/day	77.7%	6.6 m/s	10.5 hours
July	21.6 °C19.2° to 23.7°	2.8 mm/day	77.5%	6.8 m/s	10.7 hours
August	21.3 °C18.7° to 23.1°	2.7 mm/day	77.8%	6.7 m/s	11.2 hours
September	21.2 °C18.8° to 23°	2.9 mm/day	78.5%	6.4 m/s	11.9 hours
October	21.8 °C19.6° to 23.7°	4.3 mm/day	80.2%	6.3 m/s	12.6 hours
November	22.8 °C20.7° to 24.3°	3.3 mm/day	80.7%	6.1 m/s	13.2 hours
December	24 °C22.1° to 25.4°	4.6 mm/day	81.2%	5.9 m/s	13.5 hours

Compare two months

See two months side by side and how much they differ. Both use the same 1991–2020 climate normals and NASA POWER data point as the table above, so they show typical conditions, not a forecast.

First month

Second month

Mean temperature: September: 21.2 °C; March: 25.6 °C; Change from September to March: +4.4 °C
Precipitation: September: 2.9 mm/day; March: 2.6 mm/day; Change from September to March: -0.3 mm/day
Daylight: September: 11.9 hours; March: 12.1 hours; Change from September to March: +0.3 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

National park climate map

Open the climate map to compare monthly temperature, precipitation, and other averages.

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.