May Weather in Semnan, Iran

Last updated: August 23, 2025

In Semnan, Iran, the average temperature in May is a pleasant 22°C (72°F). Visitors can expect a comfortable range, with minimums dipping to 10°C (50°F) and maximums reaching up to 36°C (98°F). Precipitation is minimal, averaging only 12 mm (0.5 in) over about 3 days, while average humidity remains at a moderate 57%.

May Temperature in Semnan

In May in Semnan, the average temperature is 22°C (72°F), with maximums reaching up to 36°C (98°F) and minimums dropping as low as 10°C (50°F). This makes it an ideal time for travelers to enjoy a mix of warm days and cooler evenings.

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

The chart illustrates May 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, May typically has an average temperature of 22°C (72°F), with highs reaching up to 36°C (98°F) and lows dropping to around 10°C (50°F).

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

May Precipitation in Semnan

In Semnan in May, the precipitation amount is 12 mm (0.5 in) during a span of 3 days.

May Precipitation Trends in Semnan

The chart displays monthly precipitation patterns in Semnan, with values for each month alongside May’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May’s conditions compare to those of other months. In Semnan, May typically receives around 12 mm (0.5 inches) of precipitation spread over approximately 3 days.

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

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Millimeters (mm) Inches (in)

May Humidity in Semnan

In Semnan in May humidity is 57%. With an average temperature of 22°C (72°F), this humidity feels like a warm, slightly muggy embrace that can make outdoor adventures a bit sticky, but still enjoyable for exploring the sights and sounds of the area.

May Average Humidity in Semnan

This chart illustrates the average monthly humidity levels in Semnan, with May’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In May, average humidity in Semnan is approximately 57%, offering insight into how humid the weather typically is during this month.

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

May UV Index in Semnan

In Semnan in May, the maximum UV index reaches 13, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take protective measures. For detailed information, you can check the Hourly UV Index in Semnan.

Maximum UV Index Levels in Semnan for May

The chart shows the monthly maximum UV Index (UVI) for Semnan in May, 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 May, the maximum UV index in Semnan typically reaches 13, which falls under the extreme exposure category.

Data source: Semnan May 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 May 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 May’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 May’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