Tehran in Summer

In summer (June, July and August), Tehran sees average daytime highs around 30°C and overnight lows near 20°C, with 15 mm of rain over about 4 wet days across the season. It is the warmest season of the year and the driest season of the year.

Over the season highs climb from about 26°C in early June to 29°C by late August. The sky is clear or mostly clear about 92% of the time across summer, and the air most often feels dry.

Summer is Tehran's best season of the year to visit on our travel score. For the whole year in context, see Tehran's year-round climate.

Avg daytime high: 30°C; warmest season of the year
Avg overnight low: 20°C
Rainfall: 15 mm; 4 wet days
Avg wind: 7 km/h
Travel score: 6.8; best season of the year
Months: Jun · Jul · Aug

← Spring Tehran year-round climate Fall →

Spring Summer Fall Winter

Temperature in Tehran in Summer

Average highAverage lowShaded bands: 10–90% of days

Over the season highs climb from about 26°C in early June to 29°C by late August.

A typical summer day in Tehran reaches about 30°C and drops to 20°C overnight. The warmest of the three months is July, the coolest June.

How summer really feels in Tehran

Once humidity and wind are folded in, summer brings about 0 days that feel above 32°C and 0 that feel at or below 0°C.

Days feeling ≥ 32°C

heat index over the day's high

Days feeling ≤ 0°C

wind chill below the day's low

summer sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Tehran weather by month

How the three summer months (June, July and August) compare with the rest of the year — the season's months are highlighted.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Snow days	Daylight (hours)	Travel score
Jan	1° / -7°	42	7.6	6.7	9.9	0.0
Feb	3° / -6°	48	8.4	6.8	10.6	0.0
Mar	8° / -0°	62	9.5	5.5	11.7	1.6
Apr	15° / 6°	51	9.5	1.1	12.9	4.8
May	22° / 13°	22	4.9	0.1	13.9	7.7
Jun	28° / 18°	6	1.6	0	14.4	7.7
Jul	31° / 22°	5	1.2	0	14.2	5.9
Aug	30° / 21°	4	0.8	0	13.3	6.7
Sep	26° / 16°	5	0.9	0	12.2	9.0
Oct	19° / 10°	21	4.1	0.1	11.1	7.3
Nov	10° / 2°	44	7.1	3	10.1	2.5
Dec	4° / -5°	43	7.7	5.9	9.6	0.0

Cloud cover in Summer

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 92% of the time across summer.

Chance of precipitation in Summer

Any precipitation

Tehran gets around 15 mm of rain over 4 wet days across summer. The line is the day-by-day chance of measurable precipitation.

Humidity in Summer

DryComfortableHumidMuggyOppressiveMiserable

Most of summer feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

Wind in Summer

Winds average 7 km/h across summer.

Sunrise & sunset in Summer

DaylightNight

Daylight runs from about 14 h 12 min in early June to 12 h 48 min by late August. The lit band spans sunrise to sunset each day.

Solar energy in Summer

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day across summer, about 7.4 kWh/m².

Planning a trip in summer

Is summer a good time to visit Tehran?

Our two travel scores rate summer for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.

6.8

Sightseeing

1st-best month of the year

8.9

Beach & pool

1st-best month of the year

summer is a reasonable time to visit Tehran for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Tehran in Summer

From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In summer, Tehran sees daytime highs around 30°C and nights near 20°C. Pack light clothes and sun protection.

light clothessun protection

UV index in Tehran in Summer

LowModerateHighVery highExtreme

Clear-sky midday UV across summer averages around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Tehran peaks around July 17 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	3	5	5	7	9	10	10	10	7	6	3	3
Level	Moderate	Moderate	Moderate	Very high	Very high	Very high	Extreme	Very high	Very high	High	Moderate	Moderate

	UV index (midday)	Level
Jan	3	Moderate
Feb	5	Moderate
Mar	5	Moderate
Apr	7	Very high
May	9	Very high
Jun	10	Very high
Jul	10	Extreme
Aug	10	Very high
Sep	7	Very high
Oct	6	High
Nov	3	Moderate
Dec	3	Moderate

Air quality in Tehran in Summer

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where summer falls, not just the annual average.

Air quality in Tehran is worst in January — around 47 µg/m³ PM2.5 (poor), about 3.1× the cleanest month (July, 15 µg/m³).

Seasonal pattern from CAMS reanalysis, scaled to Tehran's WHO annual average of 31.4 µg/m³.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
PM2.5 (µg/m³)	47	43	35	31	26	20	15	18	24	32	38	46
Level	Poor	Poor	Poor	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Poor	Poor

	PM2.5 (µg/m³)	Level
Jan	47	Poor
Feb	43	Poor
Mar	35	Poor
Apr	31	Moderate
May	26	Moderate
Jun	20	Moderate
Jul	15	Moderate
Aug	18	Moderate
Sep	24	Moderate
Oct	32	Moderate
Nov	38	Poor
Dec	46	Poor

Location & terrain

Where is Tehran?

Tehran sits at 35.7°N, 51.4°E, 1,178 m above sea level, in Iran. The nearest listed city is Vaḩīdīyeh, 5.0 km away.

Topography around Tehran

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Tehran.

Within 3 km, the terrain around Tehran has only modest variations in elevation — a maximum elevation change of 152 m around an average of 1,186 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,728 m; within 80 km, extreme variations in elevation — a maximum elevation change of 5,034 m.

The land around Tehran is covered by artificial surfaces (96%) within 3 km, artificial surfaces (60%) within 16 km, and bare terrain (38%) and grassland (37%) within 80 km.

3 km

152 m

artificial surfaces 96%

16 km

1,728 m

artificial surfaces 60%

80 km

5,034 m

bare terrain 38%

treesshrubsgrasslandcroplandartificial surfacesbare terrain

← Spring Tehran year-round climate Fall →

Summer weather nearby: Vaḩīdīyeh 5.0 km · Shahrak-e Qods 8.0 km · Morteẕá Gerd 12 km · Tajrīsh 12 km · Shahrak-e ‘Alā’īn 13 km · Andīsheh 14 km · Chahār Dangeh 14 km · Bāqershahr 18 km

Iran travel facts

Travel advisory: Level 4; Do Not Travel
Power plugs: Type C / F; 220 V · 50 Hz
Prices: ≈ 352% of US; price level, 2025
GDP per capita: $3,924; 2025
Happiness: 5.2 / 10; World Happiness, 2025
Safe drinking water: 94%; of population, 2024
Homicide rate: 2.4; per 100k, 2014
Road deaths: 21.5; per 100k/yr, 2019
Income group: Upper middle; World Bank
English: Low; EF EPI 492
Religion

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Tehran (35.6944°, 51.4215°, elevation 1,178 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.