Karaj Weather in September
September is one of the perfect months to visit Karaj, with daytime temperatures of 29°C (84°F) and lows of 16°C (61°F) at night. Rainfall is minimal, averaging just 4.6 mm (0.2 in) for the month.
Rainfall in Karaj in September
Historically, September sees about 2 days of rain, with a monthly average of 4.6 mm (0.2 in). The odd shower may pass through, but it usually doesn't amount to much. A largely dry month overall.
Temperature in Karaj in September
The perfect temperature in Karaj in September makes it a solid month to visit, with 29°C (84°F) during the day and 16°C (61°F) at night. This kind of day-to-night contrast is typical for this time of year. With overnight lows of 16°C (61°F), evenings can feel noticeably cooler than the daytime. An extra layer is a good idea, though the cool air makes for a good night's sleep.
Sunshine in Karaj in September
With approximately 305 hours of sunshine, the days are filled with clear skies. It makes it a perfect month for being outside.If you're a fan of comfortable temperatures and drier conditions, September is a great time to visit.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Iran, check out our Karaj's climate page.
Karaj Temperature in September
Min Temperature
16°C (61°F)
Max Temperature
29°C (84°F)
Chance of Rain
7%
Precipitation
4.6 mm (0.2 in)
Rainy days
2 days
Humidity
36%
Sunshine
305 hours
Percentage Sunshine
Daily Historical Temperatures
41-year average (1976-2025)
Based on our historical records, temperatures in Karaj typically drop from around 34°C (93°F) at the start of September to approximately 28°C (82°F) by the end. Nights are pleasant, with lows typically ranging from 16°C (61°F) to 22°C (72°F).
Average temperatures in September
Daily Historical Precipitation
41-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather for Karaj in September
Browse day-by-day weather records for Karaj spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Karaj historical weather extremes in September
The extremes listed below come from historical weather data collected in Karaj from 2001 through 2025.
- On September 10, 2007, temperatures climbed to 38°C (100°F), marking the warmest September day on record.
- The coldest September day was on September 28, 2024, with a maximum of 17°C (63°F).
- The coldest night in September in Karaj was on September 29, 2024, with a minimum of 9°C (48°F).
Best Places in Iran in September
Find out more about the weather in Iran and which places have the best travel conditions in this month. See all of Iran in September →
perfect weather
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tolerable
unpleasant
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What to Wear in Karaj in September
Warm temperatures in September make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. With minimal rainfall expected, you can leave the rain gear at home. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.What To Do in Karaj in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Iran, check out our Karaj's climate page.
Temperature Rainfall Sunshine Humidity
See the full Karaj climate overview or explore weather in Iran.
