Arnold (CA) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Arnold.
Climate overview of Arnold
Temperatures in Arnold, California, United States of America, vary greatly throughout the year. July is the hottest month at 30°C (86°F), while December is the coldest at 9°C (48°F).
The city receives considerable rain/snowfall, with around 1074 mm (42 in) annually. December is the wettest month. It has a distinct dry season from June to September, with very warm summers and cold winters.
Arnold Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Arnold - and find the best time to visit.
Monthly Temperature in Arnold
The climate in Arnold is known for significant temperature differences throughout the year, making the weather dynamic. Typically, average maximum daytime temperatures range from a very warm 30°C (86°F) in July to a chilly 9°C (48°F) in the coolest month, December.
Nights vary from 15°C (59°F) in July to around 0°C (32°F) during the colder months.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Arnold
Arnold has a notably wet climate with abundant precipitation, recording 1074 mm (42 in) of rain/snowfall per year. The climate in Arnold shows significant variation throughout the year. Expect heavy rainfall in December, the wettest month, with an average of 216 mm (8.5 in) of precipitation over 14 rainy days.
In contrast, the driest month August offers drier and sunnier days, with around 0.1 mm (0 in) of rainfall over 0 rainy days. For more details, please visit our Arnold 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 Arnold
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, September and October
- Warmest weather: July and August
- Fewest rainy days: June, July, August and September
- Wettest months: January, February, March, April, November and December, when rainfall is highest.
- Seasonal pattern: A distinct dry season from June to September, with very warm summers and cold winters
- Coldest conditions: December, with freezing nights around 0°C (32°F).
Frequently asked questions about the climate in Arnold
What is the best time to visit Arnold?
May, June, September and October typically offer the most optimal weather in Arnold. In contrast, January, February, March and December tend to have less optimal conditions. Arnold has a distinct dry season from June to September, with very warm summers and cold winters.
What temperatures can I expect in Arnold?
Daytime highs range from 9°C (48°F) in December to 30°C (86°F) in July. Nighttime lows range from 0°C (32°F) to 15°C (59°F). Temperatures vary considerably through the year.
How much rain does Arnold get?
Annual rainfall is around 1074 mm (42 in). December is the wettest month with 216 mm (8.5 in), while August is the driest with 0.1 mm (0 in).
Arnold 3-Day Forecast
Arnold on the map
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Popular this month
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