Kailua receives its highest rainfall in Dec, while humidity peaks during summer months.
🌧️ Wettest:Dec — 71 mm☀️ Driest:Jun — 20 mm
💧 Humidity peaks at 78% in Jul · annual avg 77%
🌍 Climate Summary
Avg Annual Temp:75.9°F
Avg Annual Rainfall:575 mm
Avg Humidity:77%
Data Period:1981 – 2025
Kailua Climate Overview
Kailua has a warm subtropical climate with warm summers and mild winters.
Temperatures peak in Sep and drop to their lowest in Feb,
while rainfall is highest during winter months.
Humidity remains high throughout the year creating warm and humid conditions.
📈 Yearly Trends
The warmest year in Kailua's recorded history was 2025
(avg: 78.1°F),
while the coldest year was 1983
(avg: 73.9°F),
based on annual average temperatures.
📊 Key Climate Trends
🌡️ Kailua's temperature has remained relatively stable over the past decade
📈 Minimum temperatures show a slight warming trend in recent years
🌧️ Rainfall has decreased in recent years compared to earlier periods
🌡️ Annual Temperature Trend
View Range:
Average annual high/low · Last 10 years · °F
Kailua's temperatures has remained relatively stable over the past decade.
The highest recorded temperature reached
85°F in Sep 2015,
while the lowest dropped to
65.4°F in Feb 1981.
🌧️ Annual Precipitation
View Range:
Total annual precipitation · Last 10 years · mm/year
Annual rainfall in Kailua shows noticeable variation. Rainfall has decreased in recent years compared to earlier periods.
Based on 45 years of data (1981–2025), Sep is typically the hottest month in Kailua, Hawaii, with average high temperatures around 82°F.
What is the coldest month in Kailua?▼
Feb is the coldest month in Kailua, with average low temperatures around 68.4°F.
What is the rainiest month in Kailua?▼
Dec receives the most rainfall with approximately 71 mm, while Jun is the driest with 20 mm.
What was the highest temperature ever recorded in Kailua?▼
The highest recorded temperature was 85°F in Sep 2015. This is part of the historical record spanning 1981–2025.
What was the lowest temperature ever recorded in Kailua?▼
The lowest recorded temperature was 65.4°F in Feb 1981.
How many years of data does this page cover?▼
This page covers 45 years of climate data from 1981 to 2025. As new data is added to the database the page automatically reflects the updated coverage.
How much sunlight does Kailua get?▼
Kailua receives the most sunlight in Jun with an average solar radiation of 6.98 kWh/m²/day. This solar radiation data, sourced from NASA POWER, is useful for solar energy planning, agriculture, and understanding seasonal sunshine availability in Hawaii.
Where does this weather data come from?▼
All climate data is sourced from NASA POWER (Prediction Of Worldwide Energy Resources), based on MERRA-2 satellite and model data. It provides monthly averages for temperature, precipitation, humidity, wind speed, and solar radiation.
📚 Data Source
All weather data is sourced from NASA POWER (Prediction of Worldwide Energy Resources), a NASA project providing solar and meteorological data for renewable energy, building efficiency, and agricultural research.