Issaquah Weather in December

Issaquah in December sees low daytime temperatures of 6°C (43°F) and nighttime lows of 1°C (34°F). As part of the rainy season, showers are frequent and often heavy. Budget around 196 mm (7.7 in) of rainfall for the month.

Rainfall in Issaquah in December

As part of the rainy season, Issaquah sees around 22 days of rain in December, with an average of 196 mm (7.7 in). The rainy season here brings regular, substantial showers. It's worth being prepared for rain on most days you're out.

Temperature in Issaquah in December

Expect highs of 6°C (43°F) in Issaquah in December, with nights dropping to around 1°C (34°F). December is part of the winter season. Temperatures remain on the cold side all day. A proper warm jacket is worth having, not just for evenings. At 1°C (34°F) overnight, it gets properly cold after dark. On the bright side, cold nights tend to make for excellent sleeping conditions. This month is known for being the coldest, so make sure you pack appropriately with plenty of warm clothing.

Sunshine in Issaquah in December

The month has fewer sunny days, with around 54 hours of sunshine.

Wind Speed in Issaquah in December

December sees wind speeds averaging 4 m/s (8 knots). You'll experience variable conditions with moderate winds that create small waves on water and keep branches moving. Conditions range from light winds to moderate breezes throughout the month.

December in Issaquah can still be great, but if you prefer pleasant temperatures along with dry and sunny conditions, our weather planner can help you explore other options in the world.