Health effects can be felt by sensitive groups, including children, older adults, and people with respiratory or heart conditions. The general public is less likely to be affected.

Health & Activity Advice

⚠ Take Precautions

UV index is 7 today — high. Apply sunscreen before heading out, and consider a hat or shade during peak hours (roughly late morning to mid-afternoon).

Health effects can be felt by sensitive groups, including children, older adults, and people with respiratory or heart conditions. The general public is less likely to be affected.

Morning before 10 AM or evening after 4 PM is the more comfortable window for outdoor activity today.

Nearby Regional Outlook

Karaj Weather Radar

Live precipitation · Cloud cover · Wind

View live radar →

Frequently Asked Questions

What is the hottest month in Karaj?

The hottest month in Karaj is typically July, with daytime highs averaging around 36°C (97°F), based on 10 years of historical weather data. Overnight lows during this period average near 22°C (72°F). Take extra precautions during this time stay hydrated and avoid strenuous outdoor activity in peak afternoon heat.

What is the coldest month in Karaj?

The coldest month in Karaj is typically January, with overnight lows averaging around -2°C (28°F) and daytime highs near 7.7°C (46°F), based on 10 years of historical weather data. Freezing overnight temperatures are common during this month, so plan for icy conditions in the early morning.

Does Karaj have a rainy season?

Karaj doesn't have a sharply defined rainy season rainfall is fairly spread across the year based on 10 years of historical data. March is the wettest month on average (about 64 mm), while August is the driest (about 0 mm).

What's the best time of year to visit Karaj?

The best time to visit Karaj is typically October, when daytime highs average a comfortable 22.9°C (73°F). Rainfall during this window averages around 20 mm, one of the lighter, more comfortable stretches of the year. This is based on 10 years of historical weather data.

Atmospheric Details

Wind

7 km/h

SSW · Light Breeze · Max 18 km/h

Humidity

26 %

Low · dry air

UV Index

Very High

Visibility

16 km

Excellent

Pressure

870 hPa

Low · change likely

Dew Point

6°C

Dry air

Today vs Normal

30°C+7° above normal

The long-term average high for today is 23°C.

19 of the last 19 days with published data ran above normal.

It continues that pattern - today's forecast is also running above normal.

Red = above normal, blue = at or below · last 12 days

Air Quality

Unhealthy for Sensitive Groups

Health effects can be felt by sensitive groups, including children, older adults, and people with respiratory or heart conditions. The general public is less likely to be affected.

Health & Activity Advice

⚠ Take Precautions

UV index is 7 today — high. Apply sunscreen before heading out, and consider a hat or shade during peak hours (roughly late morning to mid-afternoon).

Health effects can be felt by sensitive groups, including children, older adults, and people with respiratory or heart conditions. The general public is less likely to be affected.

Morning before 10 AM or evening after 4 PM is the more comfortable window for outdoor activity today.