30YearWeather
Seattle in January
Seattle weather in January - United States
🌧️Wet Season

Seattle Weather in January

Plan your January trip to Seattle, United States. Based on 30 years of NASA data, expect temperatures of 7°C (high) to 2°C (low), with 47% rain probability and 8 hours of daily sunshine. Pack rain gear for around 31 rainy days.

Avg High
7°C

Hottest around day 29

Avg Low
2°C

Coolest around day 14

Rainy Days
31days

47% avg rain chance

Sunshine
8hrs/day

Winter season

Seattle January Weather Calendar

Click any day to see detailed weather information

Currency

USD

$ United States dollar

Language

English

Driving

Right side

Connect

The area code for the City of Seattle is...

Safety

Moderate Safety

GPI: 2.44

Travel Intelligence

Exclusive flight analytics & health data for Seattle

Smart Flight Estimator

Airport-to-Airport Logistics

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Add your home location in settings to see airport details.

Flight Connectivity Analysis

Airport traffic data & seasonal patterns

Major Hub
87/ 100
Traffic Index

Extremely busy airport

Peak Daily Arrivals

0

slots per day

Peak

May

Low

Nov

Monthly Traffic Distribution

508
Jan
533
Feb
558
Mar
595
Apr
740
May
696
Jun
707
Jul
713
Aug
675
Sep
584
Oct
498
Nov
575
Dec
Traffic Level
Low Season

Key Connections

Phoenix Sky Harbor (PHX)
Los Angeles (LAX)
San Francisco (SFO)
Anchorage Ted Stevens (ANC)
Denver (DEN)

Health & Safety Advisory

CDC travel health recommendations

No Requirements

No Special Vaccinations Required

Standard travel precautions apply

Source: CDC Travelers' Health

View Complete Health Guide

Is January a Good Time to Visit Seattle?

👌A reasonable choice for your trip
Short Answer

January falls in Seattle's wet season: 47% rain probability with average 4mm rainfall. Pack waterproofs and plan flexible indoor alternatives.

Decision Factors

Very high humidity

84% average humidity

Frequent rainfall expected

47% chance of rain - pack waterproofs

Near active volcano: Mount Rainier

Medium volcanic risk

Shoulder season - balanced conditions

69% of peak - good value with moderate crowds

Good For

  • 🏛️
    Cultural tourists

    Comfortable conditions for exploring museums and sites

  • 💼
    Business travelers

    Climate-controlled meetings unaffected by weather

Who Should Avoid

  • 🏖️
    Beach lovers

    Sea temperature only undefined°C - too cold for comfortable swimming

  • 👴
    Elderly travelers

    84% humidity creates difficult conditions

  • 📸
    Photographers

    78% cloud cover limits natural light opportunities

  • 💑
    Honeymoon couples

    Wedding score only 41/100 - better months available

930 observations30-year historical data
Confidence: 95%

"According to 30YearWeather's analysis of 30 years of NASA POWER satellite data,Seattle in January averages 7°C with 47% precipitation probability."

📊 Source: 30YearWeather.com🛰️ Data: NASA POWER (1991-2021)View Methodology →

Frequently Asked Questions: Seattle in January

What are the temperatures in Seattle in January?

Daytime highs average 7°C, nights drop to 2°C. Temperatures remain fairly consistent.

How many rainy days in Seattle in January?

Expect around 31 days with measurable rainfall. An umbrella is advisable.

What to wear in Seattle in January?

Warm winter clothing: insulated jacket, boots, gloves.

Is January peak season in Seattle?

This is off-peak season. Expect lower prices and fewer crowds.