October
Best time
23.8°C / 13.3°C
7 rain days
warm
- comfortable temperatures (avg high 23.8°C / 75°F)
- manageable rain (7 days)
Best time to visit Tehran
Tehran, Iran — ranked month by month from data: temperature, rainfall, snow, and peak hazard seasons. The standouts: October, April, May.
Best months to visit
April
Best time
22.8°C / 10.7°C
13 rain days
warm, rainy
- comfortable temperatures (avg high 22.8°C / 73°F)
May
Best time
29.5°C / 16.8°C
10 rain days
hot, rainy
- manageable rain (10 days)
- warm evenings without humidity overload
OK — shoulder months
September
OK
31.9°C / 20.2°C
2 rain days
hot, dry
- very low rainfall (only 2 rain days)
- warm evenings without humidity overload
March
OK
16.7°C / 5.6°C
16 rain days
mild, very wet
November
OK
14.6°C / 5.4°C
11 rain days
cool, rainy
December
OK
10.4°C / 1.2°C
9 rain days
cool
- manageable rain (9 days)
February
OK
11.3°C / 0.6°C
11 rain days
cool, rainy
January
OK
8.5°C / -1°C
11 rain days
chilly, freezing nights, rainy
Months to skip
August
Skip
35.7°C / 23.9°C
1 rain days
hot, dry
- dangerously hot (avg high 35.7°C)
June
Skip
35.6°C / 22.7°C
2 rain days
hot, dry
- dangerously hot (avg high 35.6°C)
July
Skip
37.4°C / 25.7°C
2 rain days
hot, dry
- dangerously hot (avg high 37.4°C)
How we ranked these
Each month is scored on temperature comfort (18–27°C avg high is the sweet spot), rainfall (more rain days = lower score), snow days, and peak hazard seasons (hurricanes, monsoons, etc.). Green-tier months are within ideal range with no major issues. Yellow are workable but with trade-offs. Red has at least one significant problem — extreme heat or cold, heavy rain, or peak storm season.