Ketchum (ID) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Ketchum.
Climate overview of Ketchum
Temperatures in Ketchum, Idaho, United States of America, vary greatly throughout the year. July is the hottest month at 27°C (81°F), while December is the coldest at 0°C (32°F).
With around 487 mm (19 in) of annual rain/snowfall, Ketchum has a fairly dry climate. However, it has a distinct dry season from April to September, with warm summers and very cold winters. The wettest month is December, while July sees the least rain.
Ketchum Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Ketchum - and find the best time to visit.
Monthly Temperature in Ketchum
The climate in Ketchum is known for significant temperature differences throughout the year, making the weather dynamic. Average daytime temperatures reach a comfortable 27°C (81°F) in July. In December, the coolest month of the year, temperatures drop to a very cold 0°C (32°F).
At night, temperatures range from around 9°C (48°F) in July to -12°C (10°F) in December.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Ketchum
Ketchum maintains relatively dry conditions year-round, recording average annual precipitation of 487 mm (19 in). Ketchum can be quite wet during December, receiving approximately 83 mm (3.3 in) of precipitation over 15 snowy days.
In contrast, during the driest month (July), you will experience much drier conditions, with 11 mm (0.4 in) of precipitation spread across 5 rainy days. For more details, please visit our Ketchum Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Best Time to Visit Ketchum
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: June, July, August and September
- Warmest weather: July and August
- Fewest rainy days: July, August and September
- Seasonal pattern: A distinct dry season from April to September, with warm summers and very cold winters
- Coldest conditions: December, with freezing nights around -12°C (10°F).
Frequently asked questions about the climate in Ketchum
What is the best time to visit Ketchum?
June, July, August and September typically offer the most optimal weather in Ketchum. In contrast, January, February, March, November and December tend to have less optimal conditions. Ketchum has a distinct dry season from April to September, with warm summers and very cold winters.
What temperatures can I expect in Ketchum?
Daytime highs range from 0°C (32°F) in December to 27°C (81°F) in July. Nighttime lows range from -12°C (10°F) to 9°C (48°F). Temperatures vary considerably through the year.
How much rain does Ketchum get?
Annual rainfall is around 487 mm (19 in). December is the wettest month with 83 mm (3.3 in), while July is the driest with 11 mm (0.4 in). In the coldest months, precipitation may fall as snow.
Ketchum 3-Day Forecast
Ketchum (ID) 3-Day Forecast
Ketchum on the map
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