Alta (WY) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Alta.
Climate overview of Alta
Alta, Wyoming, United States of America, sees big temperature differences between seasons, with July peaking at 26°C (79°F) and December dropping to -2°C (28°F).
With around 758 mm (30 in) of annual rain/snowfall, the city has moderate precipitation levels. December is the wettest month and July the driest. It also has a distinct dry season from July to August, with warm summers and very cold winters. The sunniest month is July, with 11.3 hours of sunshine per day on average.
Alta Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Alta - and find the best time to visit.
Monthly Temperature in Alta
Visitors to Alta can expect significant temperature changes throughout the year. Typically, average maximum daytime temperatures range from a comfortable 26°C (79°F) in July to a very cold -2°C (28°F) in the coolest month, December.
Nights vary from 9°C (48°F) in July to around -12°C (10°F) during the colder months.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Alta
Generally, Alta experiences moderate precipitation patterns, averaging 758 mm (30 in) yearly. The climate in Alta shows significant variation throughout the year. Expect moderate snowfall in December, the wettest month, with an average of 85 mm (3.3 in) of precipitation over 19 snowy days.
In contrast, the driest month July offers drier and sunnier days, with around 29 mm (1.1 in) of rainfall over 8 rainy days. For more details, please visit our Alta Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Alta
For those who appreciate different seasons, Alta serves as an ideal destination. Expect longer, more sun-filled days in July with an average of 11.3 hours of sunshine daily, and embrace the darker days in December, offering only 3.7 hours of daily sunlight.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Best Time to Visit Alta
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
- Most sunshine: July
- Fewest rainy days: July, August and September
- Seasonal pattern: A distinct dry season from July to August, 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 Alta
What is the best time to visit Alta?
June, July, August and September typically offer the most optimal weather in Alta. In contrast, January, February, March, April, November and December tend to have less optimal conditions. Alta has a distinct dry season from July to August, with warm summers and very cold winters.
What temperatures can I expect in Alta?
Daytime highs range from -2°C (28°F) in December to 26°C (79°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 Alta get?
Annual rainfall is around 758 mm (30 in). December is the wettest month with 85 mm (3.3 in), while July is the driest with 29 mm (1.1 in). In the coldest months, precipitation may fall as snow.
How sunny is Alta?
Alta receives around 2,690 hours of sunshine per year. July is the sunniest month with 340 hours, while December is the cloudiest with just 110 hours. Overall, Alta enjoys abundant sunshine.
Alta 3-Day Forecast
Alta (WY) 3-Day Forecast
Alta on the map
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