Sunnyvale Weather in January

January in Sunnyvale brings moderate temperatures, with daytime highs of 16°C (61°F) and nights around 5°C (41°F). Expect around 54 mm (2.1 in) of rainfall during the month.

Rainfall in Sunnyvale in January

This month experiences about 8 days of rain according to historical data, averaging 54 mm (2.1 in). The rainfall pattern this month is fairly balanced. Showers tend to be moderate rather than extreme.

Temperature in Sunnyvale in January

In January, Sunnyvale gets moderate temperatures, with highs of 16°C (61°F). Nights cool to around 5°C (41°F). January is a notable month of the winter season. Temperatures can feel cooler in the morning and evening, so layering is often the best approach. With lows around 5°C (41°F), nights are cold. The upside is that cool, crisp nights are often the best for a deep sleep.

Sunshine in Sunnyvale in January

The month brings about 186 hours of sunlight, offering a comfortable mix of sun and overcast.

If you prefer dry days with pleasant temperatures, January may not be the ideal month to visit Sunnyvale. Our weather planner can help you explore destinations with more pleasant weather conditions.