When to go · Castro Valley
Castro Valley, month by month
The best months for Castro Valley: Apr, May, Jun, Sep, Oct. Months to avoid: Jul, Aug.
Month by month
- JanuaryMixedOutside the best window (Apr–Jun, Sep–Oct). Across United States: Cold and snowy north and in the mountains; Florida, Hawaii and the desert Southwest are the picks.15 °C (59 °F) / 6 °C (43 °F), 11 rain days59 °F (15 °C) / 43 °F (6 °C), 11 rain daysCrowds: Low
- FebruaryMixedOutside the best window (Apr–Jun, Sep–Oct). Across United States: Still winter north; ski season in the Rockies; Presidents' Day weekend busy. Mardi Gras in New Orleans (date varies).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
- MarchGoodOutside the best window (Apr–Jun, Sep–Oct). Across United States: Spring break fills Florida beaches and parks; the desert parks come into season.18 °C (64 °F) / 8 °C (46 °F), 10 rain days64 °F (18 °C) / 46 °F (8 °C), 10 rain daysCrowds: Medium · 2 festivals or holidays
- AprilGreatInside Castro Valley's best window: Apr–Jun, Sep–Oct.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 Castro Valley's best window: Apr–Jun, Sep–Oct.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
- JuneGreatInside Castro Valley's best window: Apr–Jun, Sep–Oct.25 °C (77 °F) / 12 °C (54 °F), 2 rain days77 °F (25 °C) / 54 °F (12 °C), 2 rain daysCrowds: High
- JulyAvoidListed as a month to avoid: Jul–Sep (hot, dry, fire season).27 °C (81 °F) / 13 °C (55 °F), 1 rain days81 °F (27 °C) / 55 °F (13 °C), 1 rain daysCrowds: High · 1 festival or holiday
- AugustAvoidListed as a month to avoid: Jul–Sep (hot, dry, fire season).27 °C (81 °F) / 13 °C (55 °F), 1 rain days81 °F (27 °C) / 55 °F (13 °C), 1 rain daysCrowds: High
- SeptemberGreatInside Castro Valley's best window: Apr–Jun, Sep–Oct.27 °C (81 °F) / 13 °C (55 °F), 2 rain days81 °F (27 °C) / 55 °F (13 °C), 2 rain daysCrowds: Medium · 1 festival or holiday
- OctoberGreatInside Castro Valley's best window: Apr–Jun, Sep–Oct.24 °C (75 °F) / 11 °C (52 °F), 4 rain days75 °F (24 °C) / 52 °F (11 °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.19 °C (66 °F) / 8 °C (46 °F), 8 rain days66 °F (19 °C) / 46 °F (8 °C), 8 rain daysCrowds: Medium · 1 festival or holiday
- DecemberMixedOutside the best window (Apr–Jun, Sep–Oct). Across United States: Holiday lights in New York, ski season opens; flights and hotels peak around Christmas and New Year.15 °C (59 °F) / 6 °C (43 °F), 10 rain days59 °F (15 °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 Castro Valley, side by side.
Verdict
Apr: Great
May: Great
Daytime high
Apr: 20 °C (68 °F)68 °F (20 °C)
May: 22 °C (72 °F)72 °F (22 °C)
Night low
Apr: 9 °C (48 °F)48 °F (9 °C)
May: 11 °C (52 °F)52 °F (11 °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 Castro Valley's best window: Apr–Jun, Sep–Oct.
May: Inside Castro Valley's best window: Apr–Jun, Sep–Oct.
Castro Valley: figures are long-term averages from this guide, not a forecast.