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When to go · Castaic

Castaic in December

Mixed month. Outside 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.

Key facts

Verdict
Mixed
Temperature
17°C (63°F) / 5°C (41°F)
average high / low
Rain days
5
Crowds
High
United States overall
Prices
High
United States overall

Verdict

MixedUnited States month rating

Outside 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.

Is another month better than December?

December is rated mixed. These months rate higher:

Weather in December

Long-term averages
  • CastaicHighs around 17 °C (63 °F), lows around 5 °C (41 °F), rain on about 5 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 Castaic, side by side.

  • Verdict

    Dec: Mixed

    Apr: Great (better)

  • Daytime high

    Dec: 17 °C (63 °F)

    Apr: 23 °C (73 °F)

  • Night low

    Dec: 5 °C (41 °F)

    Apr: 9 °C (48 °F)

  • Rain days

    Dec: 5

    Apr: 3 (better)

  • Crowds

    Dec: High

    Apr: Medium

  • Prices

    Dec: High

    Apr: Medium

  • Festivals listed

    Dec: 1

    Apr: 1

December: Outside 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.

April: Inside Castaic's best window: Apr–Jun, Sep–Oct.

Castaic: figures are long-term averages from this guide, not a forecast.

What to pack

  • A warm coat, hat and gloves for mornings and evenings

Build the full packing list for your trip →

Across United States in December →