Which is the hottest month in Washington State?

The hottest time of year in Seattle, Washington State is normally July. Expect maximum daytime temperatures to reach 24°C.

Best time to visit Washington State

Q: When is the best time to visit Washington State?

The best time to visit Washington State (Seattle) is July based on the following average weather conditions. Maximum daytime temperature = 22 - 30°C. Daily hours of sunshine = 10 hours or more.

Q: Which month has the most rain in Washington State?

In terms of rainfall, December is usually the wettest month in Seattle, Washington State with 151mm on average. There are normally 18 days in December with some rain.

Q: When is it sunniest in Washington State?

The sunniest time of year in Seattle, Washington State is normally July with bright sunshine on average for 64% of daylight hours; that's 10 hours of sunshine per day.

Find the best time to visit Washington State and plan your perfect trip in 2025/2026. Get holiday inspiration, weather guides, travel advice and find great deals.

Washington State by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

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Top Washington State destinations

Below are the temperatures expected today at popular countries, regions and places in Washington State. Select a destination to compare today's forecast with average weather conditions.

All Washington State destinations

When is the best time to visit Washington State?

The best time to visit Washington State (Seattle) is July based on the following average weather conditions.

Maximum daytime temperature = 72 - 86°F [remove]
Daily hours of sunshine = 10 hours or more [remove]

Change the criteria to reflect your weather preferences.

0
Jan
0.5
Feb
1
Mar
1.5
Apr
3
May
4
Jun
5
Jul
4.5
Aug
4
Sep
0.5
Oct
0
Nov
0
Dec

Change criteria

Max Day Temperature (°F)

45
Jan
50
Feb
54
Mar
57
Apr
64
May
70
Jun
75
Jul
75
Aug
70
Sep
61
Oct
52
Nov
46
Dec

Hours of Sunshine (daily)

2
Jan
4
Feb
5
Mar
7
Apr
8
May
9
Jun
10
Jul
9
Aug
7
Sep
5
Oct
2
Nov
2
Dec

Best time to visit

Destination

Daytime temperature

Sunshine hours

Sea temperature

Monthly rainfall

Days with some rain

Heat & humidity

The weather guide for Washington State (Seattle) shows long term weather averages processed from data supplied by CRU (University of East Anglia) & today's weather forecast provided by meteoblue. Find out more about our data sources.

Metric (°C) | Imperial (°F)

More about Washington State

Explore our complete guide to Washington State with the latest travel advice for travellers and holidaymakers including official updates and local travel tips for Washington State.

Essential travel guide
Travel guidance
Travel health
Travel features
Top travel deals
FAQs

Washington State travel guide - essential info

Below is a beginner's guide to Washington State with essential travel facts such as dominant language spoken, typical flight time from the UK and the local currency. You can also check whether visas are required and what plug adapter you need to pack.

Washington - quick facts
Flight time^✝	10 hours
Time difference	UK -8 hours
Language(s)	English
Currency	US Dollar
Electricity	A + B plug (120V)
Driving side	Right
Visa^✝	Yes

Why visit Washington?

Considering a holiday to the Washington? Here are some of the very good reasons it makes such a wonderful holiday destination such as for its nature to ensure you get the most out of your 2025/2026 escape.

Nature

Washington tourist information

State of Washington Tourism

✝ = Typical flight time from the UK and visa requirements for UK travellers.

Travelling to Washington?
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Washington State travel guidance

Check the latest travel guidance and advice on visiting Washington State from official government sources (in english) from around the world including entry requirements and travel restrictions.

UK traveller advice for the Washington - UK FCDO
Irish traveller advice for the Washington - Department of Foreign Affairs, Ireland
Canadian travel advice for the Washington - Government of Canada
Safe travel advisories for the Washington - Ministry of Foreign Affairs, New Zealand
Smarter traveller advice for the Washington - Department of Foreign Affairs, Australia

Learn more about the current safety and security risks from terrorism, natural disasters and more. Read about the local laws and customs to consider when travelling around Washington State.

Note: UK FCDO - UK Foreign, Commonwealth & Development Office

Washington State travel health

Find out more about staying safe when travelling to Washington State with the latest guidance on required vaccinations and recommended medication to take with you.

Vaccines & medicines for the Washington - CDC
Health & vaccinations for the Washington - TravelHealthPro, NaTHNac
How to stay safe & healthy in the Washington - Fit for Travel, Public Health Scotland

Check out the general travel tips for staying safe and healthy in Washington State, risks of preventable diseases and what to pack.

Note: CDC - Centers for Disease Control and Prevention

Washington State travel features

Do you want to learn more about Washington State? Read our latest features covering travel tips and insider destination guides on where to go and what to do in Washington State.

How to spend 48 hours in Seattle

Washington State FAQs

Read our frequently asked questions about travelling to Washington State including the current entry restrictions, driving side, electrical plugs used and much more.

Which month has the most rain in Washington State?

In terms of rainfall, January is usually the wettest month in Seattle, Washington State with 0.0 inches on average. There are normally no days in January with some rain.

When is it sunniest in Washington State?

The sunniest time of year in Seattle, Washington State is normally January with bright sunshine on average for 0% of daylight hours; that's 0 hours of sunshine per day.

When is the sea warmest in Washington State?

The sea is usually at its warmest in Seattle, Washington State in January when the water temperature reaches 32°F.

What is the flight time to Washington State from the UK?

The flight time to Washington State from the UK is typically 10 hours.

What is the time difference between Washington State and the UK?

The time difference between Washington State and the UK is UK time-8 hours.

What is the main language spoken in Washington State?

The main language spoken in Washington State is English.

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What is the currency in Washington State?

The currency in Washington State is the US Dollar (USD).

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Which plugs are used in Washington State?

Washington State uses electrical plug type A + B (120 Volts).

Which side of the road do they drive on in Washington State?

They drive on the right side of the road in Washington State.

Find out more about driving in USA with International Drivers Association^*.

Do you need a visa for Washington State?

Yes, UK passport holders do need a visa to enter Washington State.

Check USA visa requirements for all passport holders with VisaHQ^*.

Washington State travel deals

Holidays to Washington State

Check out the latest deals, discount codes and special offers on holidays to Washington State in 2025/2026. Pay low deposits and save with last minute holiday availability and free kids places.