Which is the hottest month in Iran?

The hottest time of year in Tehran, Iran is normally July. Expect maximum daytime temperatures to reach 35°C with high heat and humidity.

Best time to visit Iran

Q: When is the best time to visit Iran?

The best time to visit Iran (Tehran) is May 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 Iran?

In terms of rainfall, March is usually the wettest month in Tehran, Iran with 40mm on average. There are normally 11 days in March with some rain.

Q: When is it sunniest in Iran?

The sunniest time of year in Tehran, Iran is normally September with bright sunshine on average for 80% of daylight hours; that's 10 hours of sunshine per day.

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

Iran by month

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

Recommended for Iran

Skyscanner: Lowest flight prices by destination

Sale

Explore lowest airfares by destinations worldwide
Find the cheapest month or filter by route or month
Prices shown found on Skyscanner in last 8 days

Go to Skyscanner deal >>

View all Skyscanner offers

Top Iran destinations

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

All Iran destinations

When is the best time to visit Iran?

The best time to visit Iran (Tehran) is May 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.

1
Jan
1.5
Feb
1.5
Mar
3.5
Apr
4.5
May
3.5
Jun
2.5
Jul
2.5
Aug
4
Sep
4
Oct
1.5
Nov
1
Dec

Change criteria

Max Day Temperature (°C)

5
Jan
8
Feb
14
Mar
20
Apr
26
May
32
Jun
35
Jul
34
Aug
30
Sep
22
Oct
15
Nov
8
Dec

Hours of Sunshine (daily)

5
Jan
6
Feb
6
Mar
7
Apr
9
May
11
Jun
11
Jul
11
Aug
10
Sep
8
Oct
7
Nov
5
Dec

Best time to visit

Destination

Daytime temperature

Sunshine hours

Sea temperature

Monthly rainfall

Days with some rain

Heat & humidity

The weather guide for Iran (Tehran) 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)

Iran weather overview

Iran is a huge country whose vast central plains are surrounded by mountains. The plains experience extreme conditions in both the summer and winter. In the summer, searing hot, dry, almost desert-like conditions prevail while the winter months bring changeable weather which can vary from mild and muggy to icy cold, when the harsh Siberian winds sweep through.

The best place to be in the winter is along the coast of the Persian Gulf or on the shore of the Arabian Sea where conditions are milder. In the summer, however, temperatures here can soar as high as on the plains and are exacerbated by high humidity creating a risk of heatstroke for the unwary. The most temperate part of Iran is the small region of forest which borders the Caspian Coast. This receives the highest level of rainfall in the country. In the rest of Iran, winter and spring are the rainiest periods.

What to pack for Iran weather

Take light, loose clothing with head covers for the summer months, wrap up much more warmly in the winter and anticipate rain in the winter and spring. Women should respect the Islamic dress code.

More about Iran

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

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

Iran travel guide - essential info

Below is a beginner's guide to Iran 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.

Iran - quick facts
Time difference	UK +3.5 hours
Language(s)	Persian
Currency	Iranian Rial
Electricity	C + F plug (230V)
Driving side	Right
Visa^✝	Yes

Why visit Iran?

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

Culture
Nature

Iran tourist information

Iran Tourism

✝ = requirements for UK travellers.

Iran travel guidance

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

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

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

Iran travel health

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

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

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

Note: CDC - Centers for Disease Control and Prevention

Iran travel features

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

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

Iran FAQs

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

Which month has the most rain in Iran?

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

When is it sunniest in Iran?

The sunniest time of year in Tehran, Iran 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 Iran?

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

What is the time difference between Iran and the UK?

The time difference between Iran and the UK is UK time+3.5 hours.

What is the main language spoken in Iran?

The main language spoken in Iran is Persian.

Learn a language for Iran with Rosetta Stone^*.

What is the currency in Iran?

The currency in Iran is the Iranian Rial (IRR).

Which plugs are used in Iran?

Iran uses electrical plug type C + F (230 Volts).

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

They drive on the right side of the road in Iran.

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

Do you need a visa for Iran?

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

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

Iran travel deals

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