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When to go · Rainier

Rainier in December

Avoid month. Listed as a month to avoid: Nov–Feb (cold, frequent rain).

Key facts

Verdict
Avoid
Temperature
10°C (50°F) / 5°C (41°F)
average high / low
Rain days
13
Crowds
High
United States overall
Prices
High
United States overall

Verdict

AvoidBest and avoid months for Rainier

Listed as a month to avoid: Nov–Feb (cold, frequent rain).

Is another month better than December?

December is rated avoid. These months rate higher:

Weather in December

Long-term averages
  • RainierHighs around 10 °C (50 °F), lows around 5 °C (41 °F), rain on about 13 days
  • Pacific Northwest, United States · Seattle, Portland, Olympic, Mount Rainierrainy

    Grey and damp October–May; July–September is dry and clear, with wildfire smoke in some years.

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 Rainier, side by side.

  • Verdict

    Dec: Avoid

    Jun: Great (better)

  • Daytime high

    Dec: 10 °C (50 °F)

    Jun: 20 °C (68 °F)

  • Night low

    Dec: 5 °C (41 °F)

    Jun: 13 °C (55 °F)

  • Rain days

    Dec: 13

    Jun: 6 (better)

  • Crowds

    Dec: High

    Jun: High

  • Prices

    Dec: High

    Jun: High

  • Festivals listed

    Dec: 1

    Jun: 0

December: Listed as a month to avoid: Nov–Feb (cold, frequent rain).

June: Inside Rainier's best window: Jun–Sep (warm, low rain).

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

What to pack

  • A warm coat, hat and gloves for mornings and evenings
  • A rain jacket or umbrella and shoes that dry fast

Build the full packing list for your trip →

Across United States in December →