Twin Falls receives its highest rainfall in Dec, while humidity peaks during winter months.
🌧️ Wettest:Dec — 44 mm☀️ Driest:Jul — 12 mm
💧 Humidity peaks at 79% in Jan · annual avg 55%
🌍 Climate Summary
Avg Annual Temp:51.6°F
Avg Annual Rainfall:353 mm
Avg Humidity:55%
Data Period:1981 – 2025
Twin Falls Climate Overview
Twin Falls has a temperate climate with warm summers and freezing winters.
Temperatures peak in Jul and drop to their lowest in Jan,
while rainfall is highest during winter months.
Humidity remains relatively low throughout the year, especially during winter months, creating cold and dry conditions.
📈 Yearly Trends
The warmest year in Twin Falls's recorded history was 2025
(avg: 55.6°F),
while the coldest year was 1982
(avg: 47.3°F),
based on annual average temperatures.
📊 Key Climate Trends
🌡️ Twin Falls'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
Twin Falls's temperatures shows a slight warming trend over the past decade.
The highest recorded temperature reached
108.9°F in Jul 2002,
while the lowest dropped to
-14.8°F in Jan 2017.
🌧️ Annual Precipitation
View Range:
Total annual precipitation · Last 10 years · mm/year
Annual rainfall in Twin Falls shows noticeable variation. Rainfall has decreased in recent years compared to earlier periods.
Based on 45 years of data (1981–2025), Jul is typically the hottest month in Twin Falls, Idaho, with average high temperatures around 102.8°F.
What is the coldest month in Twin Falls?▼
Jan is the coldest month in Twin Falls, with average low temperatures around 5.3°F.
What is the rainiest month in Twin Falls?▼
Dec receives the most rainfall with approximately 44 mm, while Jul is the driest with 12 mm.
What was the highest temperature ever recorded in Twin Falls?▼
The highest recorded temperature was 108.9°F in Jul 2002. This is part of the historical record spanning 1981–2025.
What was the lowest temperature ever recorded in Twin Falls?▼
The lowest recorded temperature was -14.8°F in Jan 2017.
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 Twin Falls get?▼
Twin Falls receives the most sunlight in Jul with an average solar radiation of 7.53 kWh/m²/day. This solar radiation data, sourced from NASA POWER, is useful for solar energy planning, agriculture, and understanding seasonal sunshine availability in Idaho.
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.