SeaTac Weather in January

During January, SeaTac experiences low daytime temperatures of 8°C (46°F) and cooler nights around 2°C (36°F). As part of the winter season, expect quite a bit of rainfall. Around 141 mm (5.6 in) is typical.

Rainfall in SeaTac in January

Analyzing past climate data, one can expect approximately 19 days of rain, averaging 141 mm (5.6 in). Expect frequent rainfall this month, and not just light drizzle. When it rains, it tends to come down hard.

Temperature in SeaTac in January

January in SeaTac brings typical temperatures with highs around 8°C (46°F) and lows of 2°C (36°F). January is typically considered a winter month. Temperatures remain on the cold side all day. A proper warm jacket is worth having, not just for evenings. With overnight lows of 2°C (36°F), nights are cold. The cold air does make for deep, comfortable sleep if you have enough blankets.

Sunshine in SeaTac in January

The city usually sees around 70 hours of sunlight, indicating fewer sunny days.

Wind Speed in SeaTac in January

Average wind conditions reach 5 m/s (10 knots) in January. This creates lively weather with fresh winds that make small trees sway noticeably. Remember this is an average: some days are less windy while others have particularly active windy conditions.

Our weather planner can help you find worldwide destinations with pleasant weather during this period. June, July, August and September typically offer the best weather for SeaTac.