Galveston receives its highest rainfall in Jun, while humidity peaks during winter months.
🌧️ Wettest:Jun — 150 mm☀️ Driest:Feb — 77 mm
💧 Humidity peaks at 83% in Feb · annual avg 79%
🌍 Climate Summary
Avg Annual Temp:68.4°F
Avg Annual Rainfall:1403 mm
Avg Humidity:79%
Data Period:1981 – 2025
Galveston Climate Overview
Galveston has a warm subtropical climate with warm summers and mild winters.
Temperatures peak in Aug and drop to their lowest in Jan,
while rainfall is highest during summer months.
Humidity remains high throughout the year, especially during winter months, creating warm and humid conditions.
📈 Yearly Trends
The warmest year in Galveston's recorded history was 2023
(avg: 72.3°F),
while the coldest year was 1983
(avg: 65.5°F),
based on annual average temperatures.
📊 Key Climate Trends
🌡️ Galveston's temperature shows a slight warming trend 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
Galveston's temperatures shows a slight warming trend over the past decade.
The highest recorded temperature reached
106°F in Aug 2023,
while the lowest dropped to
18.8°F in Dec 1989.
🌧️ Annual Precipitation
View Range:
Total annual precipitation · Last 10 years · mm/year
Annual rainfall in Galveston shows noticeable variation. Rainfall has decreased in recent years compared to earlier periods.
Based on 45 years of data (1981–2025), Aug is typically the hottest month in Galveston, Texas, with average high temperatures around 95.8°F.
What is the coldest month in Galveston?▼
Jan is the coldest month in Galveston, with average low temperatures around 32.3°F.
What is the rainiest month in Galveston?▼
Jun receives the most rainfall with approximately 150 mm, while Feb is the driest with 77 mm.
What was the highest temperature ever recorded in Galveston?▼
The highest recorded temperature was 106°F in Aug 2023. This is part of the historical record spanning 1981–2025.
What was the lowest temperature ever recorded in Galveston?▼
The lowest recorded temperature was 18.8°F in Dec 1989.
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 Galveston get?▼
Galveston receives the most sunlight in Jun with an average solar radiation of 6.45 kWh/m²/day. This solar radiation data, sourced from NASA POWER, is useful for solar energy planning, agriculture, and understanding seasonal sunshine availability in Texas.
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.