Hawaii has an average annual temperature of
75.6°F
(across all 7 cities) with approximately
866 mm of annual precipitation
and average humidity of 76%.
The warmest city is Mililani
with average July highs of 82.9°F,
while Hilo
is the coldest with average January lows of 62.4°F.
This page covers 45 years of NASA POWER climate data (1981–2025)
including temperature, rainfall, humidity, wind speed, and solar radiation.
Sep is typically the warmest month across Hawaii with average highs around
83.1°F, while
Feb is the coldest with average lows near
66.2°F.
Mar is the wettest month with approximately
102 mm of rainfall on average.
Month
Max Temp
Min Temp
Avg Temp
Rain (mm)
Humidity
Wind (m/s)
Solar (kWh/m²)
Jan
77.9°F
67.1°F
72.5°F
93
76%
4.6
4.20
Feb
77.7°F
66.2°F
72°F
84
76%
4.9
4.90
Mar
78.3°F
67.1°F
72.7°F
102
76%
5.2
5.50
Apr
78.8°F
68.4°F
73.6°F
84
76%
5.6
6.20
May
80.2°F
70°F
75.2°F
53
76%
5.2
6.60
Jun
81.1°F
72.5°F
76.8°F
36
76%
5.9
6.90
Jul
82°F
73.6°F
77.9°F
50
76%
6.1
6.70
Aug
82.9°F
74.3°F
78.6°F
59
76%
5.8
6.60
Sep
83.1°F
74.3°F
78.8°F
60
76%
5.2
6.10
Oct
82.6°F
73.4°F
78.1°F
78
76%
5.0
5.20
Nov
81°F
71.2°F
76.1°F
84
77%
5.3
4.30
Dec
78.8°F
68.9°F
73.9°F
96
77%
5.1
3.90
📈 Hawaii Yearly Climate Trends
🌡️ Annual Temperature Trend
State-wide avg annual high & low · Last 10 years
📈 Hawaii Long-Term Climate Trends (1981–2025)
This chart shows how Hawaii'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 7 cities in the state.
🌧️ Annual Precipitation Trend
State-wide avg annual precipitation · Last 10 years · mm/year
🔗 Explore Cities in Hawaii
Browse detailed weather history, monthly averages, and 45-year climate trends for every city in Hawaii.
Hilo is the wettest city in Hawaii with approximately 1792 mm of annual precipitation on average. View Hilo weather history →
What is the warmest month in Hawaii?▼
Sep is the warmest month across Hawaii, with state-wide average highs of 83.1°F and average lows of 74.3°F.
How many cities in Hawaii have weather data?▼
TownPillar has historical weather data for 7 cities in Hawaii, covering 45 years of NASA POWER climate records from 1981 to 2025.
Which month has the most sunshine in Hawaii?▼
Jun is the sunniest month across Hawaii 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 7 cities in Hawaii at monthly temporal resolution.