Which is the hottest month in Hertfordshire?

The hottest time of year in Watford, Hertfordshire is normally July. Expect maximum daytime temperatures to reach 22°C.

Best time to visit Hertfordshire

Q: When is the best time to visit Hertfordshire?

The best time to visit Hertfordshire (Watford) is July and August 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 Hertfordshire?

In terms of rainfall, December is usually the wettest month in Watford, Hertfordshire with 64mm on average. There are normally 15 days in December with some rain.

Q: When is it sunniest in Hertfordshire?

The sunniest time of year in Watford, Hertfordshire is normally August with bright sunshine on average for 41% of daylight hours; that's 6 hours of sunshine per day.

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

Hertfordshire by month

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

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Places to visit

Destination

Top Hertfordshire destinations

When is the best time to visit Hertfordshire?

The best time to visit Hertfordshire (Watford) is July and August based on the following average weather conditions.

Maximum daytime temperature = 22 - 30°C [remove]
Daily hours of sunshine = 10 hours or more [remove]

Change the criteria to reflect your weather preferences.

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Jan
0
Feb
0.5
Mar
1
Apr
1.5
May
3.5
Jun
4
Jul
4
Aug
2
Sep
0
Oct
0
Nov
0
Dec

Change criteria

Max Day Temperature (°C)

7
Jan
7
Feb
10
Mar
13
Apr
17
May
20
Jun
22
Jul
22
Aug
19
Sep
15
Oct
10
Nov
7
Dec

Hours of Sunshine (daily)

2
Jan
2
Feb
4
Mar
5
Apr
6
May
7
Jun
6
Jul
6
Aug
5
Sep
3
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 Hertfordshire (Watford) 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 / mm) | Imperial (°F / inches)

More about Hertfordshire

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

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

Hertfordshire travel guide - essential info

Below is a beginner's guide to Hertfordshire 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.

Hertfordshire - quick facts
Time difference	UK +0 hours
Language(s)	English
Currency	Pound Sterling
Electricity	G plug (230V)
Driving side	Left

Travelling to Hertfordshire?
Hotels

Hertfordshire travel guidance

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

Irish traveller advice for Hertfordshire - Department of Foreign Affairs, Ireland
Canadian travel advice for Hertfordshire - Government of Canada
US travel advisories for Hertfordshire - US Department of State
Safe travel advisories for Hertfordshire - Ministry of Foreign Affairs, New Zealand
Smarter traveller advice for Hertfordshire - 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 Hertfordshire.

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

Hertfordshire travel health

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

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

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

Note: CDC - Centers for Disease Control and Prevention

Hertfordshire travel features

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

We don't currently have any travel features on Hertfordshire. Discover more about holiday destinations around the world with this selection of general travel articles.

Hertfordshire FAQs

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

Which month has the most rain in Hertfordshire?

In terms of rainfall, January is usually the wettest month in Watford, Hertfordshire with 0mm on average. There are normally no days in January with some rain.

When is it sunniest in Hertfordshire?

The sunniest time of year in Watford, Hertfordshire 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 Hertfordshire?

The sea is usually at its warmest in Watford, Hertfordshire in January when the water temperature reaches 0°C.

What is the time difference between Hertfordshire and the UK?

The time difference between Hertfordshire and the UK is UK time+0 hours.

What is the main language spoken in Hertfordshire?

The main language spoken in Hertfordshire is English.

Learn a language for Hertfordshire with Rosetta Stone^*, Busuu^* and Rocket Languages^*.

What is the currency in Hertfordshire?

The currency in Hertfordshire is the Pound Sterling (GBP).

Send money to Hertfordshire with TransferGo^*, Wise.com^* and World Remit^*.

Which plugs are used in Hertfordshire?

Hertfordshire uses electrical plug type G (230 Volts).

Which side of the road do they drive on in Hertfordshire?

They drive on the left side of the road in Hertfordshire.

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

Hertfordshire travel deals

Holidays to Hertfordshire

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