Grand Lake (CO) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Grand Lake.
Climate overview of Grand Lake
Grand Lake, Colorado, United States of America, sees big temperature differences between seasons, with July peaking at 24°C (75°F) and January dropping to -1°C (30°F).
Annual rain/snowfall is moderate at around 510 mm (20 in), with July being the wettest month. The city also has a distinct dry season from January to March, with warm summers and very cold winters.
Grand Lake Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Grand Lake - and find the best time to visit.
Monthly Temperature in Grand Lake
Visitors to Grand Lake can expect significant temperature changes throughout the year. Average daytime temperatures reach a comfortable 24°C (75°F) in July. In January, the coolest month of the year, temperatures drop to a very cold -1°C (30°F).
At night, temperatures range from around 6°C (43°F) in July to -15°C (5°F) in January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Grand Lake
Generally, Grand Lake experiences moderate precipitation patterns, averaging 510 mm (20 in) yearly. Grand Lake can be quite wet during July, receiving approximately 59 mm (2.3 in) of precipitation over 15 rainy days.
In contrast, during the driest month (June), you will experience much drier conditions, with 22 mm (0.9 in) of precipitation spread across 9 rainy days. For more details, please visit our Grand Lake 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 Grand Lake
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 and August
- Warmest weather: July and August
- Fewest rainy days: June and September
- Seasonal pattern: A distinct dry season from January to March, with warm summers and very cold winters
- Coldest conditions: January, with freezing nights around -15°C (5°F).
Frequently asked questions about the climate in Grand Lake
What is the best time to visit Grand Lake?
June, July and August typically offer the most optimal weather in Grand Lake. In contrast, January, February, April and December tend to have less optimal conditions. Grand Lake has a distinct dry season from January to March, with warm summers and very cold winters.
What temperatures can I expect in Grand Lake?
Daytime highs range from -1°C (30°F) in January to 24°C (75°F) in July. Nighttime lows range from -15°C (5°F) to 6°C (43°F). Temperatures vary considerably through the year.
How much rain does Grand Lake get?
Annual rainfall is around 510 mm (20 in). July is the wettest month with 59 mm (2.3 in), while June is the driest with 22 mm (0.9 in).
Grand Lake 3-Day Forecast
Grand Lake (CO) 3-Day Forecast
Grand Lake on the map
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