Portola Valley Weather in June

What's the weather like in Portola Valley (California) in June 2025?

The climate in Portola Valley during June can be summarized as mild and very dry.

June is in the summer in Portola Valley and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a comfortable 22°C (72°F), whilst at night 11°C (51°F) is normal.

Portola Valley weather averages (imperial / metric)
Daytime temperature 22°C 71.6°F
Nightly temperature 10.6°C 51.1°F
Average temperature 16.3°C 61.3°F
Daily sunshine 11.5 hrs
Avg rainfall 4 mm 0.1 ins
Rainy days 1 days
Sea temperature 12.2°C 53.9°F
Humidity 68%
Windspeed 20.2kph 13 mph

On average June is the 3rd driest month of the year in Portola Valley with around 4mm 0.1 inches of rain making it a very dry time to visit.

On the flip side this corresponds to an average of 11.5 hours of sunshine per day.

June temperatures in Portola Valley

Portola Valley average temperature in June

June rainfall

Portola Valley average rain in June

June hourly sunshine

Portola Valley average rain in June

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 Portola Valley in June 2025.

Other monthly averages

Best places to visit in June

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Portola Valley weather stats

Portola Valley weather statistics
Hottest month: August 23.3°C 73.9°F
Driest month: July 2mm 0.1ins
Sunniest month: April 11.1hrs
Coldest month: January 13.3°C 55.9°F
Wettest month: January 133mm 5.2ins
Map showing location of Portola Valley (37.38411, -122.23524) Portola Valley map pin © Google

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