Tehran, Iran experiences average highs of 22°C (72°F) and lows of 10°C (50°F) throughout the year. The climate is relatively dry, with only 5 rainy days per month on average. Sunshine is abundant, averaging about 11 hours per day. Average highs have warmed by 1.2°C (2.2°F) across the available records.
Tehran, Iran Weather & Climate 2026
Monthly climate averages for Tehran, Iran. Based on 10-year ERA5 reanalysis data.
Climate Overview
Drier season: May–Oct 
Wetter season: Jan–Dec At-a-Glance Climate Summary
Live Weather & Air Quality
Key figures
Climate Score
6.6/10
Best: May, June, August, September, October
UV Index
6
High
Temperature 22°C / 10°C
Feels Like 20°C / 7°C
Rainy Days 5
Rainfall 26 mm
Sunshine 11 h
Humidity 43%
Wind Speed 10 km/h
Dew Point 2°C
Snow Days 6 days
Frost Days 14 days
Hottest Month
36°C
July
Avg Low24°C
Rain1days
Coldest Month
-4°C
January
Avg High7°C
Rain7days
Driest Month
0days
August
Avg High35°C
Avg Low23°C
Windiest Month
13 km/h
July (Gusts 41)
Worst Time to Visit
Consider avoiding January, February, December due to less favorable weather conditions.
Sun Position
Sunrise 04:49
Daylight 14.6h
Sunset 19:23
Live conditions—
Tehran on the map · live conditions
Tehran, Iran
- Continent
- Asia
- Country
- Iran
- City
- Tehran
- Population
- 7.2M
- Coordinates
- 35.69°, 51.42°
Seasonal Breakdown
Spring
Mar–May
Avg High 21°C
Avg Low 9°C
Rain 8 days/mo
1/3 best months
Summer
Jun–Aug
Avg High 35°C
Avg Low 23°C
Rain 1 days/mo
2/3 best months
Autumn
Sep–Nov
Avg High 23°C
Avg Low 12°C
Rain 4 days/mo
2/3 best months
Winter
Dec–Feb
Avg High 8°C
Avg Low -3°C
Rain 8 days/mo
Climate Charts
Based on historical averages (2016–2025)
Monthly Temperatures
HighLowShaded bands show the typical range across the available yearly records.
Line chart showing monthly temperatures. Jan: 7°C / -4°C . Feb: 9°C / -3°C . Mar: 15°C / 3°C . Apr: 21°C / 9°C . May: 28°C / 14°C . Jun: 34°C / 21°C . Jul: 36°C / 24°C . Aug: 35°C / 23°C . Sep: 31°C / 19°C . Oct: 23°C / 12°C . Nov: 14°C / 5°C . Dec: 9°C / -1°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 44 mm. Feb: 51 mm. Mar: 58 mm. Apr: 46 mm. May: 21 mm. Jun: 4 mm. Jul: 4 mm. Aug: 1 mm. Sep: 5 mm. Oct: 17 mm. Nov: 30 mm. Dec: 36 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 60%. Feb: 62%. Mar: 58%. Apr: 48%. May: 37%. Jun: 24%. Jul: 24%. Aug: 24%. Sep: 26%. Oct: 39%. Nov: 55%. Dec: 61%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 9 km/h . Feb: 9 km/h . Mar: 10 km/h . Apr: 11 km/h . May: 12 km/h . Jun: 13 km/h . Jul: 13 km/h . Aug: 12 km/h . Sep: 11 km/h . Oct: 10 km/h . Nov: 8 km/h . Dec: 8 km/h .
Sunshine
Sunshine
Sunshine: Jan: 9h. Feb: 9h. Mar: 10h. Apr: 11h. May: 12h. Jun: 13h. Jul: 13h. Aug: 13h. Sep: 11h. Oct: 10h. Nov: 9h. Dec: 8h.
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 3. Feb: UV 4. Mar: UV 6. Apr: UV 7. May: UV 8. Jun: UV 9. Jul: UV 9. Aug: UV 8. Sep: UV 7. Oct: UV 6. Nov: UV 4. Dec: UV 3.
Monthly Daylight Hours
Daylight12h reference
Monthly Dew Point & Comfort
Dew Point Dry Comfortable Humid Muggy Oppressive
Snow Days
Snow DaysSnowfall
Snow Days: Jan: 9 days. Feb: 9 days. Mar: 6 days. Apr: 2 days. May: 0 days. Jun: 0 days. Jul: 0 days. Aug: 0 days. Sep: 0 days. Oct: 0 days. Nov: 4 days. Dec: 7 days.
Climate Trends
Average highs have warmed by 1.2°C (2.2°F) across the available records. Average rainfall is trending drier by about 11 mm.
2016 to 2025
Avg high Avg rainfall
Climate summary
| Last 12 months | All years | |
|---|---|---|
| Hottest month | Jul 2025 · 37°C | Jul · 36°C |
| Coldest month | Feb 2025 · -5°C | Jan · -4°C |
| Wettest month | Mar 2025 · 51 mm | Mar · 58 mm |
| Windiest month | May 2025 · 13 km/h | Jul · 13 km/h |
Month-by-Month Weather Table
January
Poor 
February
Poor March
Fair April
Good May best
Excellent June best
Excellent July
Good August best
Excellent September best
Excellent October best
Excellent November
Fair December
Poor | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 7°C / -4°C | 4°C / -8°C | 7days (44 mm) Good | 8.5h Good | 60% Moderate | 3.4 Moderate | Poor | View Details |
| February | 9°C / -3°C | 6°C / -7°C | 9days (51 mm) Wet | 9.1h Good | 62% Muggy | 4.4 Moderate | Poor | View Details |
| March | 15°C / 3°C | 13°C / 0°C | 10days (58 mm) Wet | 9.9h Good | 58% Moderate | 5.8 High | Fair | View Details |
| April | 21°C / 9°C | 20°C / 6°C | 8days (46 mm) Wet | 11.1h Excellent | 48% Moderate | 7.2 Very High | Good | View Details |
| May best | 28°C / 14°C | 26°C / 12°C | 5days (21 mm) Good | 12.3h Excellent | 37% Comfortable | 8 Very High | Excellent | View Details |
| June best | 34°C / 21°C | 32°C / 19°C | 1days (4 mm) Excellent | 12.9h Excellent | 24% Comfortable | 8.5 Very High | Excellent | View Details |
| July | 36°C / 24°C | 35°C / 23°C | 1days (4 mm) Excellent | 12.9h Excellent | 24% Comfortable | 8.5 Very High | Good | View Details |
| August best | 35°C / 23°C | 33°C / 22°C | 0days (1 mm) Excellent | 12.5h Excellent | 24% Comfortable | 8 Very High | Excellent | View Details |
| September best | 31°C / 19°C | 29°C / 17°C | 1days (5 mm) Excellent | 11.1h Excellent | 26% Comfortable | 7 High | Excellent | View Details |
| October best | 23°C / 12°C | 20°C / 10°C | 4days (17 mm) Good | 10.1h Excellent | 39% Comfortable | 5.5 High | Excellent | View Details |
| November | 14°C / 5°C | 12°C / 1°C | 6days (30 mm) Good | 8.6h Good | 55% Moderate | 4 Moderate | Fair | View Details |
| December | 9°C / -1°C | 6°C / -5°C | 7days (36 mm) Good | 8.1h Good | 61% Muggy | 3.2 Moderate | Poor | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Tehran are May, June, August, September, October, when temperatures are comfortable and rainfall is at its lowest. This is based on 10-year climate averages for Tehran, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Tehran is July, with average daytime highs of 36°C (97°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Tehran is January, with average overnight lows of -4°C (25°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Tehran is March, averaging 58mm of precipitation across 10 rainy days. An umbrella or waterproof jacket is essential.
Tehran receives approximately 127 sunshine hours per year. The sunniest month is June with around 13 hours. Based on climate data for Tehran.
The least favorable months to visit Tehran are January, February, December, primarily due to less favorable weather conditions. For the best conditions, consider May, June, August, September, October instead.
The annual average UV index in Tehran is 6, classified as high. Standard sun protection (sunscreen, hat) is recommended during prolonged outdoor exposure.
Average humidity in Tehran is 43%, classified as dry. Humidity levels are generally comfortable and should not affect outdoor activities for most people.
Yes, Tehran receives snow. Months with snowfall average 6 snow days and 11 cm (4 in) of accumulation, with about 14 frost days during winter.
Average wind speeds in Tehran are 10 km/h (6 mph). The windiest month is July with peak winds reaching 13 km/h (8 mph) (gusts up to 41 km/h / 25 mph).
Tehran averages 16 clear-sky days per month with overall cloud cover around 28%. The clearest skies occur in August.
The annual average dew point in Tehran is 2°C (36°F), which feels dry and comfortable. Outdoor activities are comfortable year-round from a humidity standpoint.
Tehran has a Cold Semi-Arid climate, classified as BSk under the Köppen system. Arid climates have very low rainfall relative to temperature, with large swings between daytime heat and cool nights.
The 'feels like' temperature in Tehran ranges from 7°C (45°F) to 20°C (68°F) on average. Wind chill makes winters feel noticeably colder than the actual temperature — layered clothing is recommended.
Yes, June is a great time to visit Tehran. It earns a climate score of 9.3/10 with Excellent.
For June in Tehran, pack Breathable clothing, Sunscreen (SPF 30+), Sun hat, Sunglasses, Sandals. With average highs of 34°C (93°F) and 1 rainy days, these essentials will keep you comfortable.
Data Source
Climate data derived from ERA5 reanalysis (ECMWF), averaged over 2016–2025. Sea surface temperature from marine reanalysis data. Climate scores and seasonal estimates are computed by WorldStats.
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