Best Time to Visit Tehran: Weather Month by Month

Q: What is the best time to visit Tehran?

September is the best month with 32.0°C highs, 21.0°C lows, 10.3h of sunshine and 1.0% rainy days. The months of September & May offer comparable conditions.

Q: How many hours of sunshine does Tehran get in September?

Tehran averages 10.3 sunshine hours per day in September. It is the sunniest month with a climate score of 8.6/10.

Q: What is the rainiest month in Tehran?

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

Q: What are the temperatures at night in Tehran in September?

In September, overnight lows reach 21.0°C, while afternoon highs average 32.0°C.

Q: Is Tehran good in winter?

In winter (December-February), Tehran scores 4.1/10 on average — Difficult period — prefer the peak season.. The best month overall remains September with a score of 8.6/10.

Q: When should you avoid Tehran?

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

Decide

When to visit Tehran?

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

Verdict: In Tehran, May and September clearly stand out. July concentrates the least favourable conditions.

Top & avoid

🏆 May · 8.9 September · 8.9 October · 8.8 April · 8.3 ⚠️ July · 3.6

4.2

Jan

4.3

Feb

7.4

Mar

8.3

Apr

8.9

May

5.1

Jun

3.6

Jul

5.2

Aug

8.9

Sep

8.8

Oct

7.4

Nov

4.3

Dec

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

What you grasp in 5 seconds

Tehran offers 6 comfortable months, with 1 months to avoid (July). The gap is sharp: 8.9 in May vs 3.6 in July.

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.

✅ 6 comfortable months (Mar · Apr · May · Sep · Oct · Nov)

Month	T° min	T° max	Rain %	mm/day	Sun	Score	Verdict
🌥️ January →	0°C	9°C	15%	1.3mm	5.1h	4.2/10	Decent period
🌥️ February →	2°C	11°C	19%	1.5mm	6.1h	4.3/10	Decent period
⛅ March →	6°C	17°C	19%	1.7mm	6.4h	7.4/10	Best period
☀️ April →	12°C	24°C	17%	1.3mm	7.1h	8.3/10	Best period
☀️ May →	17°C	30°C	12%	0.5mm	9.0h	8.9/10	Best period
🌥️ June →	23°C	36°C	3%	0.0mm	11.4h	5.1/10	Decent period
🌧️ July →	26°C	38°C	2%	0.0mm	11.1h	3.6/10	Tough conditions
🌥️ August →	25°C	36°C	1%	0.0mm	11.2h	5.2/10	Decent period
☀️ September →	21°C	32°C	1%	0.1mm	10.3h	8.9/10	Best period
☀️ October →	14°C	25°C	8%	0.5mm	8.3h	8.8/10	Best period
⛅ November →	7°C	17°C	16%	1.1mm	6.0h	7.4/10	Best period
🌥️ December →	2°C	11°C	17%	1.2mm	4.7h	4.3/10	Decent period

🌥️ January

4.2/10

T°0°C / 9°C

Rain %15%

Sun5.1h

Decent period

🌥️ February

4.3/10

T°2°C / 11°C

Rain %19%

Sun6.1h

Decent period

⛅ March

7.4/10

T°6°C / 17°C

Rain %19%

Best period

Rain %17%

Best period

Rain %12%

Best period

Decent period

Decent period

Best period

Best period

T°7°C / 17°C

Rain %16%

Sun6.0h

Best period

🌥️ December

4.3/10

T°2°C / 11°C

Rain %17%

Sun4.7h

Decent period

📊 Quick read

Optimal window

Mar → May

Good transition

Feb · Jun · Aug · Dec

Tough period

Jul

🌡️ Detailed conditions (May)

🌡️ Feel

Warm

☀️ UV

7.9 · Moderate-Strong

💧 Humidity feel

-1°C · Dry

☔ Rain

12% · 0.5 mm/day

🌅 Sunshine

9.0h/day

Week by week

Tehran 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 2 to Jul 8, mostly dry in 10 years out of 10 (0.0 rainy day(s) on average).

Most exposed: Mar 19 to Mar 25, mostly dry in 6 years out of 10 (2.1 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 110/109°C	Jan 88/1010°C	Jan 1510/109°C	Jan 228/109°C	Jan 299/108°C
Feb	Feb 57/1011°C	Feb 128/1011°C	Feb 199/1013°C	Feb 2610/1014°C
Mar	Mar 58/1016°C	Mar 128/1018°C	Mar 196/1018°C	Mar 267/1019°C
Apr	Apr 29/1022°C	Apr 98/1023°C	Apr 169/1023°C	Apr 239/1026°C	Apr 308/1026°C
May	May 78/1028°C	May 1410/1030°C	May 2110/1032°C	May 289/1034°C
Jun	Jun 410/1034°C	Jun 1110/1036°C	Jun 1810/1036°C	Jun 2510/1037°C
Jul	Jul 210/1037°C	Jul 99/1038°C	Jul 1610/1038°C	Jul 2310/1039°C	Jul 3010/1038°C
Aug	Aug 610/1038°C	Aug 1310/1036°C	Aug 2010/1036°C	Aug 2710/1034°C
Sep	Sep 310/1035°C	Sep 1010/1033°C	Sep 1710/1032°C	Sep 2410/1030°C
Oct	Oct 110/1027°C	Oct 810/1026°C	Oct 1510/1025°C	Oct 228/1022°C	Oct 2910/1021°C
Nov	Nov 58/1018°C	Nov 128/1016°C	Nov 198/1013°C	Nov 269/1014°C
Dec	Dec 38/1012°C	Dec 109/1011°C	Dec 177/1010°C	Dec 248/1011°C

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

10-year trend

Annual temperatures — Tehran

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

Annual data unavailable for this destination.

Tailor

For your trip

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

🏛️ Heritage🍴 Gastronomy☔ Indoor sights

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 · Tehran

Expedia →

🎟️

Activities

Tours, tickets, experiences

See ↓

✈️

Flights

Multi-airline comparator

Kiwi →

🎟️ Activities & tours · Tehran

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 city break.

Country · Iran

🗣️LanguagePersan

💶CurrencyRial iranien (﷼)

🚗DrivingRight-hand

🛡️Safety ⓘAt risk · 4/5

💰Cost of living ⓘVery cheap · 1/5

🌡️ Climate

🌍Climate typeTemperate

📈Climate trend ⓘStable

🔥Hottest monthJuly · 38°C

❄️Coolest monthJanuary · 9°C

🌧️Rainiest month ⓘFebruary · 19%

🏛️ City break

📅Tourist peak seasonJune → August

☔Indoor sights ⓘYear-round

🚇Public transportGood

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Guides & rankings

World ranking 2026See →

Best summer destinationsSee →

Winter sunSee →

Where to go in JulySee →

🗺️ Climate map of 754 destinations

Location

Where is Tehran ?

Global position + regional geographic context.

🌍 World

🔍 Geographic context

Temperate climate with a 8.9 → 3.6 gap between best and worst month. 10 years of ERA5 data to choose by project.

35.69°N · 51.39°E

Questions

Frequently asked questions

What is the best time to visit Tehran?

September is the best month with 32.0°C highs, 21.0°C lows, 10.3h of sunshine and 1.0% rainy days. The months of September & May offer comparable conditions.

How many hours of sunshine does Tehran get in September?

Tehran averages 10.3 sunshine hours per day in September. It is the sunniest month with a climate score of 8.6/10.

What is the rainiest month in Tehran?

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

What are the temperatures at night in Tehran in September?

In September, overnight lows reach 21.0°C, while afternoon highs average 32.0°C.

Is Tehran good in winter?

In winter (December-February), Tehran scores 4.1/10 on average — Difficult period — prefer the peak season.. The best month overall remains September with a score of 8.6/10.

When should you avoid Tehran?

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