January Weather in Semnan, Iran

Last updated: August 23, 2025

In January, the average temperature in Semnan, Iran hovers around 4°C (39°F). Expect a minimum of -7°C (19°F) and a maximum of 15°C (59°F). During this month, precipitation amounts to 11 mm (0.4 in) over 3 days, with an average humidity level of 63%.

January Temperature in Semnan

In January in Semnan, the average temperature is 4°C (39°F). The maximum can reach 15°C (59°F), while the minimum can dip as low as -7°C (19°F). Be sure to prepare for chilly weather mixed with occasional warmth, making it a great time for layering your clothing during your travels.

January Weather in Semnan: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Semnan, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Semnan, January typically has an average temperature of 4°C (39°F), with highs reaching up to 15°C (59°F) and lows dropping to around -7°C (19°F).

Data source: Temperature data for Semnan generated using information from the Copernicus Climate Change Service.

January Precipitation in Semnan

In Semnan in January, the precipitation amount is 11 mm (0.4 in) over the course of 3 days.

January Precipitation Trends in Semnan

The chart displays monthly precipitation patterns in Semnan, with values for each month alongside January’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how January’s conditions compare to those of other months. In Semnan, January typically receives around 11 mm (0.4 inches) of precipitation spread over approximately 3 days.

Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

January Humidity in Semnan

In Semnan in January humidity is 63%. With an average temperature of 4°C (39°F), this humidity feels like a brisk chill, enveloping you in a damp embrace that can make outdoor activities uncomfortable and necessitates dressing in layers to stay warm and dry while exploring.

January Average Humidity in Semnan

This chart illustrates the average monthly humidity levels in Semnan, with January’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In January, average humidity in Semnan is approximately 63%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Semnan

In Semnan in January, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Semnan for better planning.

Maximum UV Index Levels in Semnan for January

The chart shows the monthly maximum UV Index (UVI) for Semnan in January, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In January, the maximum UV index in Semnan typically reaches 4, which falls under the moderate exposure category.

Data source: Semnan January UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How January Weather in Semnan Compares to Other Months

Weather in Semnan varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Semnan, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Semnan, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	4°C (39°F)	11 mm (0.4 inches)	63%	moderate
February Weather	6°C (44°F)	21 mm (0.8 inches)	62%	moderate
March Weather	12°C (53°F)	21 mm (0.8 inches)	63%	very high
April Weather	17°C (63°F)	17 mm (0.7 inches)	57%	very high
May Weather	22°C (72°F)	12 mm (0.5 inches)	57%	extreme
June Weather	29°C (84°F)	1 mm (0.0 inches)	47%	extreme
July Weather	31°C (88°F)	0 mm (0.0 inches)	34%	extreme
August Weather	29°C (84°F)	1 mm (0.0 inches)	28%	extreme
September Weather	25°C (77°F)	2 mm (0.1 inches)	33%	very high
October Weather	17°C (63°F)	8 mm (0.3 inches)	51%	high
November Weather	10°C (50°F)	19 mm (0.8 inches)	66%	moderate
December Weather	6°C (43°F)	11 mm (0.4 inches)	65%	moderate