When to go · Portola Valley
Portola Valley in December
Avoid month. Listed as a month to avoid: Dec–Feb (rain, some trails muddy), Jul–Aug (heat, fire risk).
Key facts
- Verdict
- Avoid
- Temperature
- 14°C (57°F)57°F (14°C) / 6°C (43°F)43°F (6°C)
- average high / low
- Rain days
- 10
- Crowds
- High
- United States overall
- Prices
- High
- United States overall
Verdict
Listed as a month to avoid: Dec–Feb (rain, some trails muddy), Jul–Aug (heat, fire risk).
Is another month better than December?
December is rated avoid. These months rate higher:
Weather in December
- Portola ValleyHighs around 14 °C (57 °F), lows around 6 °C (43 °F), rain on about 10 daysHighs around 57 °F (14 °C), lows around 43 °F (6 °C), rain on about 10 days
Festivals and holidays
Dates as our data lists them. Moving holidays (lunar and Islamic calendars, Easter) shift every year: check the date for your year before you build a trip on it.
Christmas Day big impact
25 Dec · United States
Most businesses closed; flights full from about 20 Dec to 2 Jan.
Crowds and prices
- Crowds · United States overall
- High
- Prices · United States overall
- High
United States overall: Holiday lights in New York, ski season opens; flights and hotels peak around Christmas and New Year.
High-price month: see what to book ahead.
Compare two months
Weather, crowds and prices for any two months in Portola Valley, side by side.
Verdict
Dec: Avoid
Mar: Great (better)
Daytime high
Dec: 14 °C (57 °F)57 °F (14 °C)
Mar: 18 °C (64 °F)64 °F (18 °C)
Night low
Dec: 6 °C (43 °F)43 °F (6 °C)
Mar: 8 °C (46 °F)46 °F (8 °C)
Rain days
Dec: 10
Mar: 9 (better)
Crowds
Dec: High
Mar: Medium
Prices
Dec: High
Mar: Medium
Festivals listed
Dec: 1
Mar: 2
December: Listed as a month to avoid: Dec–Feb (rain, some trails muddy), Jul–Aug (heat, fire risk).
March: Inside Portola Valley's best window: Mar–May, Sep–Nov.
Portola Valley: figures are long-term averages from this guide, not a forecast.
What to pack
- A warm layer for the evenings
- A rain jacket or umbrella and shoes that dry fast