San Ramón Weather in December

December in San Ramón brings high temperatures, with daytime highs of 27°C (81°F) and nights around 19°C (66°F). Quite a bit of rainfall is expected, around 109 mm (4.3 in), so pack an umbrella.

Rainfall in San Ramón in December

Historically, approximately 15 days this month are expected to have rain, averaging 109 mm (4.3 in). Rainfall intensity is on the higher side this month. Expect more substantial showers rather than light, passing rain.

Temperature in San Ramón in December

December in San Ramón brings typical temperatures with highs around 27°C (81°F) and lows of 19°C (66°F). Overall, the month follows a fairly predictable daily temperature pattern. Nights drop to around 19°C (66°F), which is noticeably cooler than the daytime. A light jacket for the evening is a sensible addition, and the cool nights tend to make sleeping comfortable.

Sunshine in San Ramón in December

The days are predominantly sunny, with an estimated total of around 245 hours of sunshine. These sun-filled days are perfect for playing sports, visiting parks, or going for a bike ride.

If your ideal day consists of dry skies and pleasant temperatures, January, February, March and April typically offer the best circumstances for San Ramón.