Best Time to Visit Seattle: Weather Month by Month

Q: What is the best time to visit Seattle?

July is the best month with 24.0°C highs, 14.0°C lows, 10.1h of sunshine and 9.0% rainy days. The months of July & August offer comparable conditions.

Q: How many hours of sunshine does Seattle get in July?

Seattle averages 10.1 sunshine hours per day in July. It is the sunniest month with a climate score of 8.5/10.

Q: What is the rainiest month in Seattle?

January is the most unfavourable month with January has the lowest climate score of the year and the lowest climate score of the year.

Q: What are the temperatures at night in Seattle in July?

In July, overnight lows reach 14.0°C, while afternoon highs average 24.0°C.

Q: Is Seattle good in winter?

In winter (December-February), Seattle scores 0.9/10 on average — Difficult period — prefer the peak season.. The best month overall remains July with a score of 8.5/10.

Q: When should you avoid Seattle?

January is the most difficult month to visit Seattle, with January has the lowest climate score of the year. Climate conditions are at their lowest of the year during this period.

Decide

When to visit Seattle?

The decision rests on several criteria. Climate score, tourist crowds and feasible activities.

Verdict: In Seattle, July and August clearly stand out. December concentrates the least favourable conditions.

Top & avoid

🏆 July · 8.9 August · 8.6 June · 7.9 September · 7.7 ⚠️ December · 0.8

0.8

Jan

1.0

Feb

4.1

Mar

4.3

Apr

7.4

May

7.9

Jun

8.9

Jul

8.6

Aug

7.7

Sep

4.3

Oct

0.9

Nov

0.8

Dec

Best period · ≥ 7 Decent period · 4 – 7 Tough conditions · < 4

What you grasp in 5 seconds

Seattle offers 5 comfortable months, with 4 months to avoid (January, February, November, December). The gap is sharp: 8.9 in July vs 0.8 in December.

What to check next

Your tolerance for crowds and budget. The best months concentrate tourist saturation and higher prices. Shoulder seasons offer a good compromise.

Next action

Scroll down to the detailed table to compare month by month, then open the page of the month that interests you.

Compare the 12 months By your project

How we calculate the score

The score combines 4 weighted criteria using 10 years of real climate data (ERA5).

Source : ERA5 · Open-Meteo · 10 years (2016–2025) · Full methodology →

Understand

Compare all 12 months

Month-by-month details: temperature, rain, sunshine, score and verdict.

✅ 5 comfortable months (May · Jun · Jul · Aug · Sep)

Month	T° min	T° max	Rain %	mm/day	Sun	Score	Verdict
🌧️ January →	3°C	8°C	45%	5.7mm	2.3h	0.8/10	Tough conditions
🌧️ February →	2°C	8°C	41%	4.4mm	3.9h	1.0/10	Tough conditions
🌥️ March →	4°C	11°C	38%	3.5mm	5.8h	4.1/10	Decent period
🌥️ April →	6°C	13°C	34%	2.8mm	6.9h	4.3/10	Decent period
⛅ May →	9°C	18°C	25%	1.8mm	8.2h	7.4/10	Best period
☀️ June →	12°C	20°C	22%	1.7mm	8.9h	7.9/10	Best period
☀️ July →	14°C	24°C	9%	0.4mm	10.1h	8.9/10	Best period
☀️ August →	15°C	24°C	13%	0.8mm	9.1h	8.6/10	Best period
☀️ September →	13°C	20°C	24%	2.1mm	7.4h	7.7/10	Best period
🌥️ October →	9°C	15°C	35%	4.0mm	4.6h	4.3/10	Decent period
🌧️ November →	6°C	10°C	45%	5.6mm	2.4h	0.9/10	Tough conditions
🌧️ December →	3°C	8°C	46%	5.9mm	1.7h	0.8/10	Tough conditions

🌧️ January

0.8/10

T°3°C / 8°C

Rain %45%

T°2°C / 8°C

Rain %41%

T°4°C / 11°C

Rain %38%

Sun5.8h

Decent period

🌥️ April

4.3/10

T°6°C / 13°C

Rain %34%

Sun6.9h

Decent period

⛅ May

7.4/10

T°9°C / 18°C

Rain %25%

Best period

Rain %22%

Best period

Best period

Rain %13%

Best period

Rain %24%

Best period

T°9°C / 15°C

Rain %35%

Sun4.6h

Decent period

🌧️ November

0.9/10

T°6°C / 10°C

Rain %45%

T°3°C / 8°C

Rain %46%

Sun1.7h

Tough conditions

📊 Quick read

Optimal window

May → Sep

Good transition

Apr · Oct

Tough period

Jan · Feb · Nov · Dec

🌡️ Detailed conditions (July)

🌡️ Feel

Comfortable

☀️ UV

6.9 · Moderate-Strong

💧 Humidity feel

13°C · Pleasant

☔ Rain

9% · 0.4 mm/day

🌅 Sunshine

10.1h/day

Week by week

Seattle week by week: your odds of avoiding rain

For each week of the year: in how many years out of 10 it was mostly dry (at most 2 rainy days), 2016 to 2025.

Safest week: Jul 30 to Aug 5, mostly dry in 10 years out of 10 (0.2 rainy day(s) on average).

Most exposed: Dec 17 to Dec 23, mostly dry in 1 years out of 10 (4.0 rainy days on average).

Number = years out of 10 with at most 2 rainy days in the week. Source: ERA5 reanalysis (ECMWF) via Open-Meteo, daily data 2016-2025. Rainy day = at least 1 mm, as everywhere on the site.
Jan	Jan 14/107°C	Jan 82/108°C	Jan 154/108°C	Jan 225/108°C	Jan 295/108°C
Feb	Feb 55/108°C	Feb 125/108°C	Feb 196/108°C	Feb 264/109°C
Mar	Mar 56/109°C	Mar 127/1011°C	Mar 192/1012°C	Mar 265/1012°C
Apr	Apr 24/1013°C	Apr 95/1012°C	Apr 166/1015°C	Apr 238/1015°C	Apr 306/1016°C
May	May 79/1018°C	May 143/1018°C	May 219/1018°C	May 288/1019°C
Jun	Jun 46/1020°C	Jun 117/1019°C	Jun 188/1021°C	Jun 258/1023°C
Jul	Jul 28/1023°C	Jul 910/1024°C	Jul 169/1025°C	Jul 2310/1026°C	Jul 3010/1026°C
Aug	Aug 69/1025°C	Aug 139/1026°C	Aug 208/1024°C	Aug 278/1023°C
Sep	Sep 39/1023°C	Sep 108/1022°C	Sep 174/1019°C	Sep 247/1019°C
Oct	Oct 18/1017°C	Oct 85/1015°C	Oct 155/1015°C	Oct 225/1013°C	Oct 292/1012°C
Nov	Nov 58/1011°C	Nov 123/1011°C	Nov 194/1010°C	Nov 265/108°C
Dec	Dec 35/108°C	Dec 103/108°C	Dec 171/108°C	Dec 241/107°C

A specific date? The app computes the same figure day by day.

10-year trend

Annual temperatures — Seattle

Min/max temperature curves observed over the past 10 years (ERA5). Shows climate stability and trend.

Tailor

For your trip

A few angles depending on what kind of trip you are planning.

🏖️ Beaches: Jun-Sept🌊 Swell: Sept-Mar🚤 Water activities

Book

Plan your trip

Hotels at their lowest outside peak season, highest on comfortable months. Shoulder seasons offer a good price/climate compromise.

🏨

Stay

Hotels & rentals · Seattle

Expedia →

🎟️

Activities

Tours, tickets, experiences

See ↓

✈️

Flights

Multi-airline comparator

Kiwi →

🎟️ Activities & tours · Seattle

GetYourGuide selection · free cancellation

See all →

Affiliate link · GetYourGuide

Practical info

What you need to know before you go

Three angles: the country (language, currency, safety, budget), the year-round climate, and the specifics of a beach holiday.

Country · USA

🗣️LanguageEnglish

💶CurrencyUS Dollar ($)

🚗DrivingRight-hand

🛡️Safety ⓘVery safe · 1/5

💰Cost of living ⓘExpensive · 4/5

🌡️ Climate

🌍Climate typeTemperate oceanic

📈Climate trend ⓘStable

🔥Hottest monthJuly · 24°C

❄️Coolest monthJanuary · 8°C

🌧️Rainiest month ⓘDecember · 46%

🏖️ Beach holiday

📅Peak seasonJuin → Sept

🏖️Swell (Sept–Mar) ⓘModérée

Explore

Related destinations & guides

If this destination doesn't fit your dates, here are alternatives and guides.

Similar climate destinations

Portland · United States→

Vancouver · Canada→

La Rochelle · France→

Porto · Portugal→

Nearby destinations

Whistler · Canada283 km →

Big White · Canada343 km →

Revelstoke · Canada483 km →

Lake Louise · Canada613 km →

Guides & rankings

World ranking 2026See →

Best summer destinationsSee →

Winter sunSee →

Where to go in JulySee →

🗺️ Climate map of 754 destinations

Location

Where is Seattle ?

Global position + regional geographic context.

🌍 World

🔍 Geographic context

Temperate oceanic climate with a 8.9 → 0.8 gap between best and worst month. 10 years of ERA5 data to choose by project.

47.61°N · 122.33°W

Questions

Frequently asked questions

What is the best time to visit Seattle?

July is the best month with 24.0°C highs, 14.0°C lows, 10.1h of sunshine and 9.0% rainy days. The months of July & August offer comparable conditions.

How many hours of sunshine does Seattle get in July?

Seattle averages 10.1 sunshine hours per day in July. It is the sunniest month with a climate score of 8.5/10.

What is the rainiest month in Seattle?

January is the most unfavourable month with January has the lowest climate score of the year and the lowest climate score of the year.

What are the temperatures at night in Seattle in July?

In July, overnight lows reach 14.0°C, while afternoon highs average 24.0°C.

Is Seattle good in winter?

In winter (December-February), Seattle scores 0.9/10 on average — Difficult period — prefer the peak season.. The best month overall remains July with a score of 8.5/10.

When should you avoid Seattle?

January is the most difficult month to visit Seattle, with January has the lowest climate score of the year. Climate conditions are at their lowest of the year during this period.