Our verdict
The best time to visit Seattle is November
In the summer months, temperatures can reach as high as 27℃ (82℉) in Seattle. The average low temperatures in winter float around 2℃ (35℉), while the coldest it gets down to is about -1℃ (31℉).
If you’re keen to see the sights of Seattle during the day, the sun stays up the longest around July. December sees the most amount of rain in a month if you’re ok with chancing getting drenched, so if you’re looking to stay dry, visit in July instead.
If you want to learn everything you need to know about the best times to travel to Seattle, the weather and stats by month and so much more, make sure you keep reading. Once you’re ready, we’ve included a bunch of our favourite online booking tools to help you find the best deals on flights, accommodation and anything else you’ll need for your trip. Happy reading!
Quick links: Fast facts / Seasons / Average temperatures / Monthly climate / FAQs / Map
*Support us by clicking the links above and making a booking with our partners. It's completely free for you, and it helps us make this site even more awesome! We'll <3 you for it.
Seattle seasons
Before you continue, it’s important to know when the seasons are in Seattle as they might be different to yours depending on where in the world you’re travelling from. Seattle is in the Northern Hemisphere, so the seasons fall during these months:
| Season | Months |
|---|---|
| Summer | June to August |
| Autumn/fall | September to November |
| Winter | December to February |
| Spring | March to May |
Average temperatures in Seattle
If the temperature is a big factor for you to help you decide when to visit, the chart below shows the average minimum and maximum temperatures in Seattle for each month side-by-side so you can easily see the difference in weather throughout the year. To see the temperatures in both Celsius (°C) and Fahrenheit (°F), hover or tap the shaded boxes on the graph.
Seattle climate by month
If you already have a rough idea about which months you might want to travel, the section below shows a detailed breakdown of the climate in Seattle for each month so you can see if it all suits your wants and needs. Scroll down, or use the quick menu below to jump to your preferred month.
Jump to:
Seattle in January
- Average temperature: 4℃ (40℉)
- Average high temperature: 7℃ (45℉)
- Average low temperature: 2℃ (36℉)
- Average humidity: 84%
- Average sunny days: 19 days
- Average rainfall: 18mm (1") over 9 days
- Average snow days: 1 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Seattle in January, make sure you pack a thick snow/winter jacket, thermals and some extra layers as it's always very cold.
Add visitor or local insider tips >
Seattle in February
- Average temperature: 5℃ (40℉)
- Average high temperature: 8℃ (46℉)
- Average low temperature: 2℃ (35℉)
- Average humidity: 84%
- Average sunny days: 17 days
- Average rainfall: 15mm (1") over 8 days
- Average snow days: 2 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Seattle in February, make sure you pack a thick snow/winter jacket, thermals and some extra layers as it's always very cold.
Add visitor or local insider tips >
Seattle in March
- Average temperature: 7℃ (44℉)
- Average high temperature: 10℃ (51℉)
- Average low temperature: 3℃ (37℉)
- Average humidity: 82%
- Average sunny days: 19 days
- Average rainfall: 9mm (0") over 9 days
- Average snow days: 1 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Seattle in March, make sure you pack a thick snow/winter jacket, thermals and some extra layers as it's always very cold.
Add visitor or local insider tips >
Seattle in April
- Average temperature: 9℃ (48℉)
- Average high temperature: 14℃ (56℉)
- Average low temperature: 5℃ (40℉)
- Average humidity: 79%
- Average sunny days: 19 days
- Average rainfall: 10mm (0") over 8 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Seattle in April, make sure you pack a thick snow/winter jacket, thermals and some extra layers as it's always very cold.
Add visitor or local insider tips >
Seattle in May
- Average temperature: 13℃ (55℉)
- Average high temperature: 18℃ (65℉)
- Average low temperature: 7℃ (45℉)
- Average humidity: 75%
- Average sunny days: 20 days
- Average rainfall: 10mm (0") over 7 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Seattle in May, make sure you pack a warm jacket or coat.
Add visitor or local insider tips >
Seattle in June
- Average temperature: 15℃ (59℉)
- Average high temperature: 21℃ (69℉)
- Average low temperature: 9℃ (48℉)
- Average humidity: 74%
- Average sunny days: 23 days
- Average rainfall: 4mm (0") over 4 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Seattle in June, make sure you pack a coat or jumper for the evenings and some light clothes for the daytime.
Add visitor or local insider tips >
Seattle in July
- Average temperature: 18℃ (64℉)
- Average high temperature: 24℃ (76℉)
- Average low temperature: 11℃ (52℉)
- Average humidity: 69%
- Average sunny days: 26 days
- Average rainfall: 3mm (0") over 4 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Seattle in July, make sure you pack a coat or jumper for the evenings, and t-shirts and light gear for the daytime.
Add visitor or local insider tips >
Seattle in August
- Average temperature: 18℃ (65℉)
- Average high temperature: 25℃ (76℉)
- Average low temperature: 12℃ (53℉)
- Average humidity: 71%
- Average sunny days: 26 days
- Average rainfall: 3mm (0") over 2 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Seattle in August, make sure you pack a coat or jumper for the evenings, and t-shirts and light gear for the daytime.
Add visitor or local insider tips >
Seattle in September
- Average temperature: 15℃ (59℉)
- Average high temperature: 21℃ (70℉)
- Average low temperature: 10℃ (51℉)
- Average humidity: 75%
- Average sunny days: 21 days
- Average rainfall: 7mm (0") over 6 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Seattle in September, make sure you pack a coat or jumper for the evenings and some light clothes for the daytime.
Seattle in October
- Average temperature: 11℃ (51℉)
- Average high temperature: 15℃ (59℉)
- Average low temperature: 7℃ (45℉)
- Average humidity: 79%
- Average sunny days: 21 days
- Average rainfall: 13mm (1") over 7 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Seattle in October, make sure you pack a warm jacket or coat.
Add visitor or local insider tips >
Seattle in November
- Average temperature: 7℃ (44℉)
- Average high temperature: 9℃ (49℉)
- Average low temperature: 4℃ (40℉)
- Average humidity: 84%
- Average sunny days: 17 days
- Average rainfall: 16mm (1") over 9 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Seattle in November, make sure you pack a thick snow/winter jacket, thermals and some extra layers as it's always very cold.
Add visitor or local insider tips >
Seattle in December
- Average temperature: 4℃ (39℉)
- Average high temperature: 6℃ (43℉)
- Average low temperature: 2℃ (35℉)
- Average humidity: 84%
- Average sunny days: 18 days
- Average rainfall: 22mm (1") over 9 days
- Average snow days: 1 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Seattle in December, make sure you pack a thick snow/winter jacket, thermals and some extra layers as it's always very cold.
Add visitor or local insider tips >