Winter
Dec → Feb9 to 10°
nights 2 to 3°
- 14 rainy days · 122 mm
When is the best time to visit Seattle?
- Jan9°not recommended
- Feb10°not recommended
- Mar13°not recommended
- Apr15°not recommended
- May19°fair
- Jun22°recommended
- Jul25°recommended
- Aug25°recommended
- Sep22°recommended
- Oct16°fair
- Nov12°not recommended
- Dec9°not recommended
RecommendedFairNot recommended· afternoon temperature
The weather in Seattle, month by month
The table of averages, month by month
| Month | High | Low | Rainfall | Rainy days | Best |
|---|---|---|---|---|---|
| January | 9° | 3° | 132 mm | 15 d | |
| February | 10° | 3° | 94 mm | 12 d | |
| March | 13° | 4° | 100 mm | 13 d | |
| April | 15° | 6° | 73 mm | 11 d | |
| May | 19° | 10° | 50 mm | 8 d | |
| June | 22° | 12° | 31 mm | 6 d | ✓ |
| July | 25° | 14° | 14 mm | 2 d | ✓ |
| August | 25° | 15° | 21 mm | 3 d | ✓ |
| September | 22° | 12° | 35 mm | 6 d | ✓ |
| October | 16° | 8° | 89 mm | 11 d | |
| November | 12° | 4° | 147 mm | 14 d | |
| December | 9° | 2° | 139 mm | 14 d |
The four seasons in Seattle, in figures
What the 2015-2024 averages (Seattle (Boeing Field)) show, season by season, to compare at a glance instead of reading twelve rows of a table.
Spring
Mar → May13 to 19°
nights 4 to 10°
- 11 rainy days · 74 mm
Summer
Jun → Aug22 to 25°
nights 12 to 15°
- 4 rainy days · 22 mm
Autumn
Sep → Nov12 to 22°
nights 4 to 12°
- 10 rainy days · 90 mm
Book early for June to September
The timing is right, so it is right for everyone: in these months the best places to stay and the small-group tours go first. Here is where to start.
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Daylight in Seattle, month by month
The time between sunrise and sunset, from shortest to longest. Not to be confused with the sunshine hours in the table above, which count clear skies. In June there are 15h57 of daylight, in December 8h27, a difference of 7h30.
8h50Jan
10h11Feb
11h45Mar
13h34Apr
15h06May
15h57Jun
15h36Jul
14h15Aug
12h29Sep
10h45Oct
9h13Nov
8h27Dec
Calculated for the latitude of the reference point "Seattle (Boeing Field)" (47.53°). Values on the 15th of each month, local solar time.
What to do in Seattle, month by month
| Activity | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sightseeing & walks | ||||||||||||
| Long days |
favourablewith compromisesunfavourable
- Sightseeing & walks: February, April, May, June, July, August, September, October
- Long days: May, June, July, August
Grid derived from the climate averages (temperature, rainfall), not from an opinion.
Travelling off-peak
Month by month, in detail
January
Not recommended9°3° at night
- 132 mm · 15 d
Low season, lower prices
February
Not recommended10°3° at night
- 94 mm · 12 d
Low season, lower prices
March
Not recommended13°4° at night
- 100 mm · 13 d
Low season, lower prices
April
Not recommended15°6° at night
- 73 mm · 11 d
Low season, lower prices
May
Fair19°10° at night
- 50 mm · 8 d
Low season, lower prices
June
Recommended22°12° at night
- 31 mm · 6 d
Busy, without the crush
July
Recommended25°14° at night
- 14 mm · 2 d
High season, book early
August
Recommended25°15° at night
- 21 mm · 3 d
High season, book early
September
Recommended22°12° at night
- 35 mm · 6 d
Busy, without the crush
October
Fair16°8° at night
- 89 mm · 11 d
Low season, lower prices
November
Not recommended12°4° at night
- 147 mm · 14 d
Low season, lower prices
December
Not recommended9°2° at night
- 139 mm · 14 d
Quiet, then the holidays
Read the twelve months in detail
January. Cool: 9 °C at best, 3 °C at night. A very wet month, 132 mm of rain over 15 days. Low season: fewer people, lower prices.
February. Cool: 10 °C at best, 3 °C at night. Expect 12 days of rain in the month (94 mm). Low season: fewer people, lower prices.
March. Cool: 13 °C at best, 4 °C at night. Expect 13 days of rain in the month (100 mm). Low season: fewer people, lower prices.
April. Cool: 15 °C at best, 6 °C at night. Expect 11 days of rain in the month (73 mm). Low season: fewer people, lower prices.
May. Mild, 19 °C in the afternoon and 10 °C early in the morning. Expect 8 days of rain in the month (50 mm). Low season: fewer people, lower prices.
June. Mild, 22 °C in the afternoon and 12 °C early in the morning. Rain stays light: 31 mm over 6 days. Busy season, without the crush.
July. 25 °C in the afternoon and 14 °C at night. Hardly any rain (14 mm over 2 days). High season: book early.
August. 25 °C in the afternoon and 15 °C at night. Hardly any rain (21 mm over 3 days). High season: book early.
September. Mild, 22 °C in the afternoon and 12 °C early in the morning. Rain stays light: 35 mm over 6 days. Busy season, without the crush.
October. Cool: 16 °C at best, 8 °C at night. Expect 11 days of rain in the month (89 mm). Low season: fewer people, lower prices.
November. Cool: 12 °C at best, 4 °C at night. A very wet month, 147 mm of rain over 14 days. Low season: fewer people, lower prices.
December. Cool: 9 °C at best, 2 °C at night. A very wet month, 139 mm of rain over 14 days. Quiet at the start of the month, then busier as the holidays approach.
Same season, other ideas
Their best time overlaps with this one: worth comparing before you book.
Frequently asked questions
When is the best time to visit Seattle?
June to September: over these months, average highs range from 22 to 25 °C, with 4 days of rain a month on average (2015-2024 averages, Seattle (Boeing Field)).
Which month should you avoid in Seattle?
November: it is the wettest of the months to avoid, with 147 mm over 14 days of rain on average over 2015-2024 at the reference point (Seattle (Boeing Field)).
What is the hottest month in Seattle?
July, with 25 °C on average in the afternoon and 14 °C at night. 2015-2024 averages (Seattle (Boeing Field)).
What is the coldest month in Seattle?
January, with 9 °C at best during the day and 3 °C at night. 2015-2024 averages (Seattle (Boeing Field)).
What is the driest month in Seattle?
July: 14 mm over 2 days of rain, against 147 mm in November, the wettest month.
Plan this trip
📒 The free printable Seattle guide: itinerary, map, where to sleep→
🧭 When to visit the American West: the country overview→
🗓️ Best time to visit: all our destinations→
Compare with other destinations
Photos: Travis Kerkvliet / Pexels · Diego Delso / CC BY-SA 4.0 (Wikimedia Commons) · Miguel Hermoso Cuesta / CC BY-SA 4.0 (Wikimedia Commons) · Daniel Schwen / CC BY-SA 4.0 (Wikimedia Commons) · Dietmar Rabich / CC BY-SA 4.0 (Wikimedia Commons) · Joe Mabel / CC BY-SA 4.0 (Wikimedia Commons)