Karaj Weather & Climate: Best Time to Visit

The climate in Karaj is known for significant temperature differences throughout the year, making the weather dynamic. Typically, average maximum daytime temperatures range from a very warm 34°C (93°F) in July to a chilly 4°C (39°F) in the coolest month, January.

Nights vary from 21°C (70°F) in July to around -6°C (21°F) during the colder months.

Check out our detailed temperature page for more information.

Temperature ranges by month

Karaj maintains relatively dry conditions year-round, recording average annual precipitation of 365 mm (14 in). The climate in Karaj shows significant variation throughout the year. Expect moderate rainfall in March, the wettest month, with an average of 59 mm (2.3 in) of precipitation over 12 rainy days.

In contrast, the driest month August offers drier and sunnier days, with around 4 mm (0.2 in) of rainfall over 2 rainy days. For more details, please visit our Karaj Precipitation page.

The mean monthly precipitation over the year, including rain, hail, and snow

The average number of days each month with precipitation

For those who appreciate different seasons, Karaj serves as an ideal destination. Expect longer, more sun-filled days in July with an average of 11.4 hours of sunshine daily, and embrace the darker days in December, offering only 5.1 hours of daily sunlight.

Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Daily hours of sunshine

The relative humidity is moderate throughout the year in Karaj.

The city experiences its highest humidity in January, reaching 67%. In June, the humidity drops to its lowest level at 34%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year