Seattle has a mild marine climate, making summers relatively cool and winters fairly mild.

It rains frequently, but temperature changes are not significant, with most rainfall concentrated in the winter months.

The climate and rainfall in Seattle vary by season, with precipitation distributed relatively evenly, although it rains more in winter.

Seattle Monthly Temperatures and Precipitation (Fahrenheit, Celsius)

• January:

  • Average High Temperature: 45°F (7.2°C)
  • Average Low Temperature: 35°F (1.8°C)
  • Average Precipitation: About 5.4 inches (137mm)
  • Seattle's winter is mild, and January is the wettest month of the year. While precipitation is high, temperatures are not cold.

• February:

  • Average High Temperature: 49°F (9.7°C)
  • Average Low Temperature: 37°F (3.0°C)
  • Average Precipitation: About 4 inches (101mm)
  • February still sees frequent rain, but temperatures rise slightly, hinting at the arrival of spring.

• March:

  • Average High Temperature: 53°F (11.5°C)
  • Average Low Temperature: 38°F (3.6°C)
  • Average Precipitation: About 3.5 inches (89.9mm)
  • Rain continues frequently, marking the transition into spring. Temperatures gradually warm up.

• April:

  • Average High Temperature: 57°F (14.0°C)
  • Average Low Temperature: 41°F (5.1°C)
  • Average Precipitation: About 2.3 inches (59.2mm)
  • April sees a slight reduction in rain, but intermittent showers still occur. Temperatures continue to warm up.

• May:

  • Average High Temperature: 64°F (17.7°C)
  • Average Low Temperature: 46°F (7.9°C)
  • Average Precipitation: About 1.7 inches (43.2mm)
  • May brings a full spring atmosphere, with decreasing rain and warming temperatures.

• June:

  • Average High Temperature: 70°F (21.1°C)
  • Average Low Temperature: 52°F (11.1°C)
  • Average Precipitation: About 1.5 inches (38.1mm)
  • Summer begins, bringing warmer and drier weather, with very little precipitation.

• July:

  • Average High Temperature: 75°F (24.0°C)
  • Average Low Temperature: 55°F (12.9°C)
  • Average Precipitation: About 0.8 inches (19.3mm)
  • July is the hottest month in Seattle, but even high temperatures remain relatively mild with dry weather.

• August:

  • Average High Temperature: 75°F (24.0°C)
  • Average Low Temperature: 56°F (13.2°C)
  • Average Precipitation: About 1.1 inches (29.0mm)
  • August continues the trend of mild and dry weather.

• September:

  • Average High Temperature: 69°F (20.7°C)
  • Average Low Temperature: 52°F (11.1°C)
  • Average Precipitation: About 1.9 inches (47.8mm)
  • September marks the end of summer and the transition into fall, with rain beginning to fall gradually.

• October:

  • Average High Temperature: 60°F (15.4°C)
  • Average Low Temperature: 45°F (7.7°C)
  • Average Precipitation: About 3.2 inches (82.0mm)
  • Fall weather becomes apparent, with increasing rainfall.

• November:

  • Average High Temperature: 51°F (10.3°C)
  • Average Low Temperature: 40°F (4.5°C)
  • Average Precipitation: About 5.8 inches (148.1mm)
  • November sees heavy rainfall, signaling the onset of winter.

• December:

  • Average High Temperature: 45°F (7.3°C)
  • Average Low Temperature: 36°F (2.1°C)
  • Average Precipitation: About 5.9 inches (150.1mm)
  • December brings the full onset of winter weather, with persistent rain and cold temperatures.

Climate Characteristics

• Precipitation: Seattle experiences most of its rainfall in winter, with very little rain in summer. The low precipitation in summer allows for mild and clear weather.
• Temperature: Seattle's temperatures show little variation due to its mild marine climate, with cool summers and relatively warm winters.
• Sunshine Hours: Seattle has many cloudy days in winter due to frequent rain, but enjoys long sunshine hours in summer.

Seattle is characterized by its mild and frequently rainy climate, featuring wet winters and mild summers.

Although it rains often, temperature changes are minimal, providing a comfortable living environment due to its climatic characteristics.