Boulder Bay Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Boulder Bay.
Climate overview of Boulder Bay
Boulder Bay, United States of America, sees big temperature differences between seasons, with July peaking at 27°C (81°F) and December dropping to 9°C (48°F).
Boulder Bay sees a moderate amount of rain/snowfall, totalling around 545 mm (21 in) per year. It experiences a distinct dry season from April to November, with warm summers and cold winters, creating some seasonal variation.
Boulder Bay Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Boulder Bay - and find the best time to visit.
Monthly Temperature in Boulder Bay
Visitors to Boulder Bay can expect significant temperature changes throughout the year. Average maximum daytime temperatures range from a comfortable 27°C (81°F) in July, the warmest time of the year, to a chilly 9°C (48°F) during cooler months like December.
At night, you can expect temperatures ranging from 10°C (50°F) in July to around -5°C (23°F) during December.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Boulder Bay
Generally, Boulder Bay experiences moderate precipitation patterns, averaging 545 mm (21 in) yearly. Significant seasonal changes in precipitation occur throughout the year. In the wettest month, December it receives high rainfall, averaging 147 mm (5.8 in) of precipitation, recorded across 8 rainy days. In contrast, the driest month June brings less rainfall, with 2 mm (0.1 in) over a single rainy day. For more details, please visit our Boulder Bay 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 Boulder Bay
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: May, June, July, August, September and October
- Warmest weather: July and August
- Fewest rainy days: May, June, September and October
- Wettest months: January, February and December, when rainfall is highest.
- Seasonal pattern: A distinct dry season from April to November, with warm summers and cold winters
- Coldest conditions: December, with freezing nights around -5°C (23°F).
Frequently asked questions about the climate in Boulder Bay
What is the best time to visit Boulder Bay?
May, June, July, August, September and October typically offer the most optimal weather in Boulder Bay. In contrast, January, February and December tend to have less optimal conditions. Boulder Bay has a distinct dry season from April to November, with warm summers and cold winters.
What temperatures can I expect in Boulder Bay?
Daytime highs range from 9°C (48°F) in December to 27°C (81°F) in July. Nighttime lows range from -5°C (23°F) to 10°C (50°F). Temperatures vary considerably through the year.
How much rain does Boulder Bay get?
Annual rainfall is around 545 mm (21 in). December is the wettest month with 147 mm (5.8 in), while June is the driest with 2 mm (0.1 in).
Boulder Bay 3-Day Forecast
Boulder Bay 3-Day Forecast
Boulder Bay on the map
Boulder Bay is highlighted - select any city to see its climate.
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Where to go in July - average daytime high across popular destinations.
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