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.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Issaquah's climate page.
Issaquah Temperature in December
Min Temperature
1°C (34°F)
Max Temperature
6°C (43°F)
Chance of Rain
74%
Precipitation
196 mm (7.7 in)
Rainy days
22 days
Humidity
80% *
Windspeed
4 m/s (8 knots) *
Sunshine
54 hours *
Percentage Sunshine
20% *
Best Places in the United States of America in December
Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in December →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Issaquah in December
Dress warmly and in layers for your trip to Issaquah in December. A good base layer system works wonders. Start with good thermal underwear, add something warm like a fleece sweater, then finish with a waterproof jacket on top. It's going to pour! Pack a good poncho and prepare for very wet conditions. Sunglasses aren't essential this month, though you might want them for the occasional bright moment.What To Do in Issaquah in December
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Issaquah's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed
See the full Issaquah climate overview or explore weather in the United States of America.
