When to go · San Dimas
San Dimas, month by month
The best months for San Dimas: Jun, Jul, Aug, Sep. Months to avoid: Jan, Feb, Dec.
Month by month
- JanuaryAvoidListed as a month to avoid: Dec–Feb (waterpark closed, cool weather).19 °C (66 °F) / 7 °C (45 °F), 6 rain days66 °F (19 °C) / 45 °F (7 °C), 6 rain daysCrowds: Low
- FebruaryAvoidListed as a month to avoid: Dec–Feb (waterpark closed, cool weather).19 °C (66 °F) / 8 °C (46 °F), 6 rain days66 °F (19 °C) / 46 °F (8 °C), 6 rain daysCrowds: Low · 1 festival or holiday
- MarchGoodOutside the best window (Jun–Sep (waterpark season)). Across United States: Spring break fills Florida beaches and parks; the desert parks come into season.21 °C (70 °F) / 9 °C (48 °F), 5 rain days70 °F (21 °C) / 48 °F (9 °C), 5 rain daysCrowds: Medium · 2 festivals or holidays
- AprilGoodOutside the best window (Jun–Sep (waterpark season)). Across United States: Good month for the Southwest, Washington cherry blossoms, the South; mountain roads still closed.23 °C (73 °F) / 11 °C (52 °F), 3 rain days73 °F (23 °C) / 52 °F (11 °C), 3 rain daysCrowds: Medium · 1 festival or holiday
- MayGoodOutside the best window (Jun–Sep (waterpark season)). Across United States: Warm and green; Memorial Day (last Monday) opens the summer season; timed-entry systems start at some parks.26 °C (79 °F) / 13 °C (55 °F), 1 rain days79 °F (26 °C) / 55 °F (13 °C), 1 rain daysCrowds: Medium · 1 festival or holiday
- JuneGreatInside San Dimas's best window: Jun–Sep (waterpark season).29 °C (84 °F) / 16 °C (61 °F), 1 rain days84 °F (29 °C) / 61 °F (16 °C), 1 rain daysCrowds: High
- JulyGreatInside San Dimas's best window: Jun–Sep (waterpark season).32 °C (90 °F) / 18 °C (64 °F), 0 rain days90 °F (32 °C) / 64 °F (18 °C), 0 rain daysCrowds: High · 1 festival or holiday
- AugustGreatInside San Dimas's best window: Jun–Sep (waterpark season).33 °C (91 °F) / 18 °C (64 °F), 0 rain days91 °F (33 °C) / 64 °F (18 °C), 0 rain daysCrowds: High
- SeptemberGreatInside San Dimas's best window: Jun–Sep (waterpark season).31 °C (88 °F) / 16 °C (61 °F), 1 rain days88 °F (31 °C) / 61 °F (16 °C), 1 rain daysCrowds: Medium · 1 festival or holiday
- OctoberGoodOutside the best window (Jun–Sep (waterpark season)). Across United States: Best all-round month: New England foliage, desert parks, cooler cities. High roads start closing late in the month.27 °C (81 °F) / 13 °C (55 °F), 2 rain days81 °F (27 °C) / 55 °F (13 °C), 2 rain daysCrowds: Medium
- NovemberMixedOutside the best window (Jun–Sep (waterpark season)). Across United States: Quiet between holidays; Thanksgiving week is the busiest travel period of the year.22 °C (72 °F) / 9 °C (48 °F), 3 rain days72 °F (22 °C) / 48 °F (9 °C), 3 rain daysCrowds: Medium · 1 festival or holiday
- DecemberAvoidListed as a month to avoid: Dec–Feb (waterpark closed, cool weather).19 °C (66 °F) / 7 °C (45 °F), 5 rain days66 °F (19 °C) / 45 °F (7 °C), 5 rain daysCrowds: High · 1 festival or holiday
Compare two months
Weather, crowds and prices for any two months in San Dimas, side by side.
Verdict
Jun: Great
Jul: Great
Daytime high
Jun: 29 °C (84 °F)84 °F (29 °C)
Jul: 32 °C (90 °F)90 °F (32 °C)
Night low
Jun: 16 °C (61 °F)61 °F (16 °C)
Jul: 18 °C (64 °F)64 °F (18 °C)
Rain days
Jun: 1
Jul: 0 (better)
Crowds
Jun: High
Jul: High
Prices
Jun: High
Jul: High
Festivals listed
Jun: 0
Jul: 1
June: Inside San Dimas's best window: Jun–Sep (waterpark season).
July: Inside San Dimas's best window: Jun–Sep (waterpark season).
San Dimas: figures are long-term averages from this guide, not a forecast.