Monthly climate guide
Tehran weather in January
With highs near 10°C (49°F) and lows around -1°C (31°F), January feels cool in Tehran. Rainfall averages about 36 mm (fairly dry) and the sky is a mix of sun and cloud. Daytime highs are about the same as December and 2°C cooler than February.
What stands out in January
- Mornings start cold: the average low is -1°C, and frost is common.
- Just 40 km apart, but Tehran runs about 11°C warmer than Karaj this month.
- January brings mid-winter to Tehran.
January is typically Tehran's coolest month.
Avg high
10°C
49°F
Avg low
-1°C
31°F
Rainfall
36 mm
fairly dry
Humidity
58%
relative
Sky
51%
cloud · a mix of sun and cloud
Tehran weather by month
Show the monthly averages as a table
| Month | Avg high | Avg low | Rain | Humidity | Cloud cover |
|---|---|---|---|---|---|
| January | 10°C / 49°F | -1°C / 31°F | 36 mm | 58% | 51% |
| February | 12°C / 53°F | 0°C / 32°F | 43 mm | 57% | 52% |
| March | 17°C / 62°F | 4°C / 40°F | 43 mm | 53% | 58% |
| April | 22°C / 72°F | 9°C / 49°F | 36 mm | 50% | 58% |
| May | 29°C / 85°F | 15°C / 59°F | 15 mm | 40% | 48% |
| June | 36°C / 96°F | 21°C / 69°F | 6 mm | 26% | 31% |
| July | 38°C / 101°F | 24°C / 74°F | 11 mm | 23% | 35% |
| August | 37°C / 98°F | 23°C / 73°F | 12 mm | 24% | 25% |
| September | 32°C / 90°F | 19°C / 66°F | 21 mm | 29% | 24% |
| October | 24°C / 75°F | 12°C / 54°F | 54 mm | 45% | 37% |
| November | 15°C / 59°F | 5°C / 40°F | 60 mm | 58% | 55% |
| December | 11°C / 51°F | 1°C / 33°F | 38 mm | 60% | 49% |
What to pack for January
- A proper insulated winter coat
- A hat, scarf and gloves
- Thermal base layers and warm, grippy boots for icy mornings
- A small travel umbrella, just in case
Is January a good time to visit Tehran?
Compare the months in the chart above to find your ideal window.
Best time to visit Tehran →Other Iran cities in January
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Tehran weather in January. WeatherCompare, 2026 (NASA POWER / ERA5, 2011–2020 monthly averages). https://weathercompare.eu/weather/iran/tehran/january
<a href="https://weathercompare.eu/weather/iran/tehran/january">Tehran weather in January</a> (WeatherCompare)
<iframe src="https://weathercompare.eu/embed/iran/tehran" width="300" height="160" style="border:0;border-radius:12px" loading="lazy" title="Tehran weather in January"></iframe> <p style="font-size:12px"><a href="https://weathercompare.eu/weather/iran/tehran/january">Tehran weather in January</a> – WeatherCompare</p>
Tehran in January: quick answers
Is January a good time to visit Tehran?
January is cool in Tehran, with highs around 10°C. Better for museums and city walks than the beach, and usually quieter.
How warm is Tehran in January?
Average highs are about 10°C (49°F) and average lows about -1°C (31°F), based on 10 years of daily data.
Does it rain a lot in Tehran in January?
Tehran typically gets around 36 mm of rain in January — fairly dry.
Figures are long-term averages for the area around Tehran (NASA POWER / ERA5, 2011–2020), not a forecast for a specific year. For upcoming days, see the live multi-source forecast.