Tehran Weather in January

January in Tehran typically sees daytime highs of 5°C (41°F) and nighttime lows of -6°C (21°F). Expect some snow/rainfall during the month. It falls within the winter season.

Rainfall in Tehran in January

Typically, you can expect about 10 days of snow/rain this month, with 45 mm (1.8 in) on average. Expect a fairly normal spread of rainfall this month, with no particular pattern of very heavy or very persistent showers.

Temperature in Tehran in January

Expect highs of 5°C (41°F) in Tehran in January, with nights dropping to around -6°C (21°F). January is part of the winter season. Even daytime conditions remain cold, making layers, a warm coat, and winter accessories a good idea. With lows of -6°C (21°F), nights are freezing. Packing a spare blanket is worth considering if you're staying somewhere that might not be fully heated. This month tends to bring the coldest weather of the year, so be sure to pack enough warm clothing to stay comfortable.

Sunshine in Tehran in January

The area enjoys a moderate level of sunlight, with around 172 hours. It's a good balance between sunny and cloudy days.

Wind Speed in Tehran in January

January has wind speeds averaging 1 m/s (2 knots). You can expect very gentle conditions with light air movement on typical days. Since this is an average, daily weather varies from perfectly still moments to some breezier days.

If you prefer dry days with pleasant temperatures, January may not be the ideal month to visit Tehran. Our weather planner can help you explore destinations with more pleasant weather conditions.

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For a detailed overview over the year and the best time to visit Iran, check out our Tehran's climate page.

Tehran Temperature in January

Min Temperature -6°C (21°F)  

Max Temperature 5°C (41°F)  

Chance of Rain 33%  

Precipitation 45 mm (1.8 in)  

Rainy days 10 days  

Humidity 65% *  

Windspeed 1 m/s (2 knots) *  

Sunshine 172 hours *  

Percentage Sunshine *  

* Data from: Tehran Mehrabad, Iran (7 KM, 4 Miles).

Daily Historical Temperatures

37-year average (1980-2026)

Based on our historical records, temperatures in Tehran typically stay consistent throughout January, with daily highs averaging around 5°C (41°F). Nights are cold, with lows typically ranging from 0°C (32°F) to 3°C (37°F).

Average temperatures in January

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Daily Historical Precipitation

37-year average (1980-2026)

Average daily rainfall for each day of the month based on long-term records.

Average precipitation in January

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Historical weather for Tehran in January

Browse day-by-day weather records for Tehran spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.

Historical weather Temperatures Precipitation

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Tehran historical weather extremes in January

Based on weather observations in Tehran between 2004 and 2025, these are the recorded extremes during January.

• On January 20, 2010, temperatures climbed to 18°C (64°F), marking the warmest January day on record.
• The lowest daytime temperature in January was -5°C (23°F), recorded on January 8, 2008.
• Nighttime temperatures dropped to -14°C (7°F) on January 18, 2006, marking the coldest January night on record.

What to Wear in Tehran in January

We recommend to layer up for chilly conditions in Tehran in January. 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. Bring sunglasses since you'll have some sunny periods throughout the month

What To Do in Tehran in January

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

5/10

Cycling

3/10

Walking

3/10

Camping

2/10

Outdoor sports

3/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Iran, check out our Tehran's climate page.

More climate data for Tehran

Temperature Rainfall Sunshine Humidity Wind Speed

See the full Tehran climate overview or explore weather in Iran.