Best time to visit Tehran: month-by-month weather (2026)
The highest-scoring months in Tehran are Apr, May, Jun and Oct.
Best months
Apr, May, Jun and Oct
Peak season
Apr, May, Jun, Jul, Aug and Oct
Off season
Jan, Feb and Dec
Monthly Temperatures (°C)
Monthly Rainfall (mm)
Month-by-Month Guide
Temperature, rainfall and sunshine are measured. The visit score below is derived from those three (design spec §5.3)estimate.
Jan
Temp: 0.6°C – 9.7°C
Rain: 32mm
Sunshine: 7.8h/day
Visit score: 4.9/10
Feb
Temp: 0.6°C – 10.3°C
Rain: 37mm
Sunshine: 8.6h/day
Visit score: 5/10
Mar
Temp: 6.3°C – 17.7°C
Rain: 53mm
Sunshine: 9.3h/day
Visit score: 5.6/10
Apr
BestTemp: 12.6°C – 25.2°C
Rain: 19mm
Sunshine: 11.1h/day
Visit score: 10/10
May
BestTemp: 18°C – 30.2°C
Rain: 15mm
Sunshine: 12h/day
Visit score: 10/10
Jun
BestTemp: 22.8°C – 35.2°C
Rain: 2mm
Sunshine: 12.7h/day
Visit score: 8.5/10
Jul
Temp: 26.3°C – 38.4°C
Rain: 0mm
Sunshine: 12.7h/day
Visit score: 6.5/10
Aug
Temp: 25.6°C – 37.5°C
Rain: 0mm
Sunshine: 12.6h/day
Visit score: 6.5/10
Sep
Temp: 20.6°C – 32.1°C
Rain: 6mm
Sunshine: 11.2h/day
Visit score: 8.5/10
Oct
BestTemp: 14°C – 25.8°C
Rain: 12mm
Sunshine: 10.5h/day
Visit score: 10/10
Nov
Temp: 7.7°C – 18.4°C
Rain: 24mm
Sunshine: 9h/day
Visit score: 6.5/10
Dec
Temp: 2.1°C – 11.6°C
Rain: 20mm
Sunshine: 7.9h/day
Visit score: 4.9/10
When to go, and when not to
April, May, June, and October stand out as the best months to visit, based on the highest visit scores in the climate data. April brings highs of 25.2C and lows of 12.6C with just 19mm of rain, May turns warmer at 30.2C with 15mm of rain, June reaches 35.2C with only 2mm of rain, and October cools back down to 25.8C with 12mm of rain, all paired with over 10 hours of sunshine a day.
The peak season extends further, from April through August and including October, which means July and August bring the most intense heat, with highs of 38.4C and 37.5C respectively, and virtually no rain. Travelers who prefer cooler conditions or lower prices might instead look at the off-season months of January, February, and December, though March is the wettest month overall at 53mm of rain.
Season Guide
Spring
March – May
Mild temperatures and blooming gardens. A great time for sightseeing with fewer crowds than summer.
Packing tips
- · Light layers
- · Rain jacket
- · Comfortable walking shoes
Summer
June – August
Warmest months with the longest days. Peak tourist season in most destinations.
Packing tips
- · Sunscreen
- · Hat
- · Light clothing
- · Refillable water bottle
Autumn
September – November
Cooling temperatures and autumn foliage. Shoulder season with good deals on accommodations.
Packing tips
- · Medium layers
- · Sweater
- · Waterproof jacket
Winter
December – February
Coldest months with shorter days. Holiday markets and winter activities in many cities.
Packing tips
- · Warm coat
- · Scarf and gloves
- · Thermal layers
- · Waterproof boots
Keep reading
Sources
- GeoNames city database — CC BY 4.0, fetched September 14, 2026
- Open-Meteo climate archive — CC BY 4.0, fetched September 21, 2026
AI-written interpretation reviewed against the data above — claude-sonnet-5, generated September 21, 2026. Every number on this page comes from a dataset named here; the formulas are public.