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Karaj in December sees low daytime temperatures of 6°C (43°F) and nighttime lows of -3°C (27°F). Moderate snow/rainfall is typical, with around 44 mm (1.7 in) for the month.
Our weather planner can help you find worldwide destinations with pleasant weather during this period. May, September and October typically offer the best weather for Karaj.
Pick a month to see the average temperature, rainfall and sunshine in Karaj - and find the best time to visit.
41-year average (1976-2025)
Based on our historical records, temperatures in Karaj typically stay consistent throughout December, with daily highs averaging around 6°C (43°F). Nights are cold, with lows typically ranging from 0°C (32°F) to 5°C (41°F).
41-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
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.
Based on weather observations in Karaj between 2002 and 2025, these are the recorded extremes during December.
Find out more about the weather in Iran and which places have the best travel conditions in this month. See all of Iran in December →
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
We recommend to layer up for chilly conditions in Karaj in December. You could start with thermal underwear or a good base layer to keep your core warm on the cooler days this month. Maybe also add a sweater or fleece, and top it off with a windproof jacket. Rain is likely on several days, so bring a good rain jacket. Sunglasses could come in handy during the sunnier parts of your trip.
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Temperature Rainfall Sunshine Humidity
See the full Karaj climate overview or explore weather in Iran.
Where to go in December - average daytime high across popular destinations.
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