Belmont (CA) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Belmont.
Climate overview of Belmont
Temperatures in Belmont, California, United States of America, shift moderately through the seasons. The warmest month is September at 25°C (77°F), and the coolest is December at 15°C (59°F).
Rainfall is modest, totalling around 414 mm (16 in) annually. The city experiences a distinct dry season from April to November, with warm summers and mild winters. December tends to be the wettest month. Sunshine peaks in May, when the city sees around 10.8 hours of sunshine per day.
Belmont Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Belmont - and find the best time to visit.
Monthly Temperature in Belmont
The weather in Belmont changes moderately throughout the year, offering enough variation to appreciate each season. Average maximum daytime temperatures range from a comfortable 25°C (77°F) in September, the warmest time of the year, to a moderate 15°C (59°F) during cooler months like December.
At night, you can expect temperatures ranging from 14°C (57°F) in September to around 5°C (41°F) during December.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Belmont
Belmont maintains relatively dry conditions year-round, recording average annual precipitation of 414 mm (16 in). Significant seasonal changes in precipitation occur throughout the year. In the wettest month, December it receives moderate rainfall, averaging 99 mm (3.9 in) of precipitation, recorded across 12 rainy days. In contrast, the driest month July brings less rainfall, with 0 mm (0 in) over 0 rainy days. For more details, please visit our Belmont 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 Belmont
Seasonal changes in sunshine hours are quite dramatic in Belmont. While May receives considerable daily sunshine with up to 10.8 hours, December marks the darkest time of the year, where sunshine is scarce with only 5.3 hours of sunlight per day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Water Temperature in Belmont
The mean water temperature over the year ranges from 12°C (54°F) in January to 14°C (57°F) in June.
Water temperature over the year
Humidity in Belmont by Month
The relative humidity is high throughout the year in Belmont.
The city experiences its highest humidity in January, reaching 80%. In June, the humidity drops to its lowest level at 71%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Wind Speed in Belmont
The mean wind speed varies between 3 m/s (6 knots) and 7 m/s (14 knots) throughout the year. It is lowest in January, November and December and highest during June and July. What does this mean?
The mean monthly wind speed over the year (meters per second)
Best Time to Visit Belmont
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: June, July, August and September
- Most sunshine: April, May, June and July
- Fewest rainy days: June, July, August and September
- Seasonal pattern: A distinct dry season from April to November, with warm summers and mild winters
Frequently asked questions about the climate in Belmont
What is the best time to visit Belmont?
May, June, July, August, September and October typically offer the most optimal weather in Belmont. In contrast, January, February and December tend to have less optimal conditions. Belmont has a distinct dry season from April to November, with warm summers and mild winters.
What temperatures can I expect in Belmont?
Daytime highs range from 15°C (59°F) in December to 25°C (77°F) in September. Nighttime lows range from 5°C (41°F) to 14°C (57°F).
How much rain does Belmont get?
Annual rainfall is around 414 mm (16 in). December is the wettest month with 99 mm (3.9 in), while July is the driest with 0 mm (0 in).
How sunny is Belmont?
Belmont receives around 3,058 hours of sunshine per year. May is the sunniest month with 324 hours, while December is the cloudiest with just 160 hours. Overall, Belmont enjoys abundant sunshine.
Belmont 3-Day Forecast
Belmont (CA) 3-Day Forecast
Belmont on the map
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