Historical weather data, all-time temperature records, and monthly climate averages for Karaj, Alborz Province, Iran. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5 in Karaj sits right in the heart of the city's wettest stretch — there's a 56% chance of precipitation today, making it more likely than not that you'll see rain. Historically, temperatures on this date have swung dramatically, from a balmy 80° in 2001 to a freezing 26° back in 1965, though the typical range lands around 39–62°.
Karaj earns its extremes: the thermometer has hit 106° as recently as August 2024, and plunged to -14° in January 1964 — a 120-degree spread across its recorded history. A single February day in 2020 dropped 1.7 inches of rain, while a January 1985 snowstorm buried the city under 6.7 inches.
Summer in Karaj is hot and dry, peaking in mid-July with average highs around 95°, while January is the time to bundle up with highs averaging just 40°. Spring is the wet season — plan accordingly if you're visiting March through April — and the city stays pleasantly mild in October and November before winter sets in.