When to go · Portola Valley
Portola Valley, month by month
The best months for Portola Valley: Mar, Apr, May, Sep, Oct, Nov. Months to avoid: Jan, Feb, Jul, Aug, Dec.
Month by month
- JanuaryAvoidListed as a month to avoid: Dec–Feb (rain, some trails muddy), Jul–Aug (heat, fire risk).14 °C (57 °F) / 6 °C (43 °F), 10 rain days57 °F (14 °C) / 43 °F (6 °C), 10 rain daysCrowds: Low
- FebruaryAvoidListed as a month to avoid: Dec–Feb (rain, some trails muddy), Jul–Aug (heat, fire risk).16 °C (61 °F) / 7 °C (45 °F), 10 rain days61 °F (16 °C) / 45 °F (7 °C), 10 rain daysCrowds: Low · 1 festival or holiday
- MarchGreatInside Portola Valley's best window: Mar–May, Sep–Nov.18 °C (64 °F) / 8 °C (46 °F), 9 rain days64 °F (18 °C) / 46 °F (8 °C), 9 rain daysCrowds: Medium · 2 festivals or holidays
- AprilGreatInside Portola Valley's best window: Mar–May, Sep–Nov.20 °C (68 °F) / 9 °C (48 °F), 6 rain days68 °F (20 °C) / 48 °F (9 °C), 6 rain daysCrowds: Medium · 1 festival or holiday
- MayGreatInside Portola Valley's best window: Mar–May, Sep–Nov.22 °C (72 °F) / 11 °C (52 °F), 4 rain days72 °F (22 °C) / 52 °F (11 °C), 4 rain daysCrowds: Medium · 1 festival or holiday
- JuneGoodOutside the best window (Mar–May, Sep–Nov). Across United States: Rockies and northern parks open; desert heat builds; hurricane season starts. Book parks months ahead.25 °C (77 °F) / 13 °C (55 °F), 2 rain days77 °F (25 °C) / 55 °F (13 °C), 2 rain daysCrowds: High
- JulyAvoidListed as a month to avoid: Dec–Feb (rain, some trails muddy), Jul–Aug (heat, fire risk).27 °C (81 °F) / 14 °C (57 °F), 1 rain days81 °F (27 °C) / 57 °F (14 °C), 1 rain daysCrowds: High · 1 festival or holiday
- AugustAvoidListed as a month to avoid: Dec–Feb (rain, some trails muddy), Jul–Aug (heat, fire risk).27 °C (81 °F) / 14 °C (57 °F), 1 rain days81 °F (27 °C) / 57 °F (14 °C), 1 rain daysCrowds: High
- SeptemberGreatInside Portola Valley's best window: Mar–May, Sep–Nov.26 °C (79 °F) / 13 °C (55 °F), 2 rain days79 °F (26 °C) / 55 °F (13 °C), 2 rain daysCrowds: Medium · 1 festival or holiday
- OctoberGreatInside Portola Valley's best window: Mar–May, Sep–Nov.23 °C (73 °F) / 11 °C (52 °F), 4 rain days73 °F (23 °C) / 52 °F (11 °C), 4 rain daysCrowds: Medium
- NovemberGreatInside Portola Valley's best window: Mar–May, Sep–Nov.18 °C (64 °F) / 8 °C (46 °F), 7 rain days64 °F (18 °C) / 46 °F (8 °C), 7 rain daysCrowds: Medium · 1 festival or holiday
- DecemberAvoidListed as a month to avoid: Dec–Feb (rain, some trails muddy), Jul–Aug (heat, fire risk).14 °C (57 °F) / 6 °C (43 °F), 10 rain days57 °F (14 °C) / 43 °F (6 °C), 10 rain daysCrowds: High · 1 festival or holiday
Compare two months
Weather, crowds and prices for any two months in Portola Valley, side by side.
Verdict
Mar: Great
Apr: Great
Daytime high
Mar: 18 °C (64 °F)64 °F (18 °C)
Apr: 20 °C (68 °F)68 °F (20 °C)
Night low
Mar: 8 °C (46 °F)46 °F (8 °C)
Apr: 9 °C (48 °F)48 °F (9 °C)
Rain days
Mar: 9
Apr: 6 (better)
Crowds
Mar: Medium
Apr: Medium
Prices
Mar: Medium
Apr: Medium
Festivals listed
Mar: 2
Apr: 1
March: Inside Portola Valley's best window: Mar–May, Sep–Nov.
April: Inside Portola Valley's best window: Mar–May, Sep–Nov.
Portola Valley: figures are long-term averages from this guide, not a forecast.