When to go · Mill Valley
Mill Valley, month by month
The best months for Mill Valley: Apr, May, Jun, Sep, Oct. Months to avoid: Jan, Feb, Jul, Aug, Dec.
Month by month
- JanuaryAvoidListed as a month to avoid: Jul–Aug (fog and weekend crowds), Dec–Feb (wet trails).13 °C (55 °F) / 5 °C (41 °F), 11 rain days55 °F (13 °C) / 41 °F (5 °C), 11 rain daysCrowds: Low
- FebruaryAvoidListed as a month to avoid: Jul–Aug (fog and weekend crowds), Dec–Feb (wet trails).15 °C (59 °F) / 6 °C (43 °F), 10 rain days59 °F (15 °C) / 43 °F (6 °C), 10 rain daysCrowds: Low · 1 festival or holiday
- MarchGoodOutside the best window (Apr–Jun, Sep–Oct). Across United States: Spring break fills Florida beaches and parks; the desert parks come into season.17 °C (63 °F) / 7 °C (45 °F), 10 rain days63 °F (17 °C) / 45 °F (7 °C), 10 rain daysCrowds: Medium · 2 festivals or holidays
- AprilGreatInside Mill Valley's best window: Apr–Jun, Sep–Oct.19 °C (66 °F) / 8 °C (46 °F), 6 rain days66 °F (19 °C) / 46 °F (8 °C), 6 rain daysCrowds: Medium · 1 festival or holiday
- MayGreatInside Mill Valley's best window: Apr–Jun, Sep–Oct.21 °C (70 °F) / 10 °C (50 °F), 4 rain days70 °F (21 °C) / 50 °F (10 °C), 4 rain daysCrowds: Medium · 1 festival or holiday
- JuneGreatInside Mill Valley's best window: Apr–Jun, Sep–Oct.23 °C (73 °F) / 11 °C (52 °F), 2 rain days73 °F (23 °C) / 52 °F (11 °C), 2 rain daysCrowds: High
- JulyAvoidListed as a month to avoid: Jul–Aug (fog and weekend crowds), Dec–Feb (wet trails).24 °C (75 °F) / 12 °C (54 °F), 1 rain days75 °F (24 °C) / 54 °F (12 °C), 1 rain daysCrowds: High · 1 festival or holiday
- AugustAvoidListed as a month to avoid: Jul–Aug (fog and weekend crowds), Dec–Feb (wet trails).24 °C (75 °F) / 12 °C (54 °F), 1 rain days75 °F (24 °C) / 54 °F (12 °C), 1 rain daysCrowds: High
- SeptemberGreatInside Mill Valley's best window: Apr–Jun, Sep–Oct.24 °C (75 °F) / 12 °C (54 °F), 2 rain days75 °F (24 °C) / 54 °F (12 °C), 2 rain daysCrowds: Medium · 1 festival or holiday
- OctoberGreatInside Mill Valley's best window: Apr–Jun, Sep–Oct.22 °C (72 °F) / 10 °C (50 °F), 4 rain days72 °F (22 °C) / 50 °F (10 °C), 4 rain daysCrowds: Medium
- NovemberMixedOutside the best window (Apr–Jun, Sep–Oct). Across United States: Quiet between holidays; Thanksgiving week is the busiest travel period of the year.17 °C (63 °F) / 7 °C (45 °F), 8 rain days63 °F (17 °C) / 45 °F (7 °C), 8 rain daysCrowds: Medium · 1 festival or holiday
- DecemberAvoidListed as a month to avoid: Jul–Aug (fog and weekend crowds), Dec–Feb (wet trails).13 °C (55 °F) / 5 °C (41 °F), 11 rain days55 °F (13 °C) / 41 °F (5 °C), 11 rain daysCrowds: High · 1 festival or holiday
Compare two months
Weather, crowds and prices for any two months in Mill Valley, side by side.
Verdict
Apr: Great
May: Great
Daytime high
Apr: 19 °C (66 °F)66 °F (19 °C)
May: 21 °C (70 °F)70 °F (21 °C)
Night low
Apr: 8 °C (46 °F)46 °F (8 °C)
May: 10 °C (50 °F)50 °F (10 °C)
Rain days
Apr: 6
May: 4 (better)
Crowds
Apr: Medium
May: Medium
Prices
Apr: Medium
May: Medium
Festivals listed
Apr: 1
May: 1
April: Inside Mill Valley's best window: Apr–Jun, Sep–Oct.
May: Inside Mill Valley's best window: Apr–Jun, Sep–Oct.
Mill Valley: figures are long-term averages from this guide, not a forecast.