Best Time to Visit Sun Valley for Hiking – July Scores 88/100

verified

Outdoor activities Potential

88/100

Excellent

Based on optimal climate

calendar_month

Seasonality

check

Best Time

July, August, September

Avoid

Avoid (Extreme Weather)

thermostat

Weather

-6°C – 16°C

Avg Temp Range

Precipitation

Generally dry

thumb_up

Good For

ac_unitWinter Sports

map

Explore United States

Compare other outdoor activities spots in this country.

United StatesOutdoor activities climate guide

compare_arrows

Not sure yet?

Compare Sun Valley with similar outdoor activities destinations.

hiking

🥾 Planning a hiking trip to Sun Valley?

The best time to visit Sun Valley for hiking is July, August, September, when trail conditions are most favorable and the weather is more stable.

Start with the essentials:

hotel → Find top-rated stays near hiking areas in Sun Valley explore → Browse the best hiking tours and routes in Sun Valley

Climate Heatmap

See at a glance which months offer the best outdoor activities conditions — based on temperature, rainfall and climate scores.

Summer offers the most reliable hiking conditions in Sun Valley, with open trails and longer daylight hours.

→ See where to stay in Sun Valley

Outdoor activities conditions breakdown

Monthly weather & climate data for Sun Valley

Month	Climate Score	Predictability	Avg Temp	Max Temp	Rain (mm)	Rain Days	Humidity	Season
January	38Poor Cool temperatures. Some rain conditions.	Predictability 85Weather conditions are fairly consistent throughout the year.	-6°	-1°	65	12.2	63%	shoulder
February	39Poor Cool temperatures. Mostly dry conditions.	Predictability 100Weather conditions are fairly consistent throughout the year.	-5°	1°	46	11.7	63%	dry
March	38Poor Cool temperatures. Mostly dry conditions.	Predictability 85Weather conditions are fairly consistent throughout the year.	-2°	4°	42	12.7	59%	dry
April	40Poor Cool temperatures. Mostly dry conditions.	Predictability 100Weather conditions are fairly consistent throughout the year.	2°	8°	38	11.2	53%	dry
May	43Poor Cool temperatures. Mostly dry conditions.	Predictability 100Weather conditions are fairly consistent throughout the year.	6°	14°	50	10.9	47%	dry
June	70Good Cool temperatures. Mostly dry conditions.	Predictability 100Weather conditions are fairly consistent throughout the year.	11°	19°	40	8.7	45%	dry
July	88Excellent Mild temperatures. Mostly dry conditions.	Predictability 100Weather conditions are fairly consistent throughout the year.	16°	25°	16	5.4	32%	dry
August	87Excellent Mild temperatures. Mostly dry conditions.	Predictability 60Weather conditions vary somewhat by season.	15°	24°	16	5.4	28%	dry
September	77Good Cool temperatures. Mostly dry conditions.	Predictability 60Weather conditions vary somewhat by season.	11°	19°	20	6	32%	dry
October	46Poor Cool temperatures. Mostly dry conditions.	Predictability 60Weather conditions vary somewhat by season.	5°	12°	34	7.1	43%	dry
November	41Poor Cool temperatures. Mostly dry conditions.	Predictability 100Weather conditions are fairly consistent throughout the year.	-3°	3°	38	10.5	62%	dry
December	36Poor Cool temperatures. Some rain conditions.	Predictability 85Weather conditions are fairly consistent throughout the year.	-6°	-1°	71	13.2	60%	shoulder