Menlo Park Weather in January

What's the weather like in Menlo Park (California) in January 2026?

The climate in Menlo Park during January can be summarized as cool and wet.

January is in the winter in Menlo Park and is typically the coldest month of the year. Daytime maximum temperatures average around a cool 14°C (56°F), whilst at night 4°C (40°F) is normal.

Menlo Park weather averages (imperial / metric)
Daytime temperature 13.6°C 56.4°F
Nightly temperature 4.3°C 39.7°F
Average temperature 8.9°C 48°F
Daily sunshine 6.3 hrs
Avg rainfall 133 mm 5.2 ins
Rainy days 10 days
Sea temperature 12.4°C 54.2°F
Humidity 79%
Windspeed 12.2kph 8 mph

On average January is the wettest month of the year in Menlo Park with around 133mm 5.2 inches of rain making it a wet time to visit. This rainfall is typically spread over 10 days, although this may vary considerably.

On the flip side this corresponds to an average of 6.3 hours of sunshine per day.

January temperatures in Menlo Park

Menlo Park average temperature in January

January rainfall

Menlo Park average rain in January

January hourly sunshine

Menlo Park average rain in January

The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Menlo Park in January 2025.