May Weather in Rotterdam, United States

Last updated: June 24, 2025

In Rotterdam, United States, the average temperature in May hovers around 15°C (59°F), with a minimum dipping to 0°C (32°F) and a maximum soaring to 34°C (93°F). Expect about 106 mm (4.2 in) of precipitation over 13 days, while average humidity stays comfortably high at 76%.

May Temperature in Rotterdam

In May in Rotterdam, the average temperature is 15°C (59°F). Maximum temperatures can reach 34°C (93°F), while minimums can drop to as low as 0°C (32°F). Travelers should be prepared for a wide range of temperatures during their visit.

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

The chart illustrates May temperature patterns in Rotterdam, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Rotterdam, May typically has an average temperature of 15°C (59°F), with highs reaching up to 34°C (93°F) and lows dropping to around 0°C (32°F).

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

May Precipitation in Rotterdam

In Rotterdam in May, the precipitation amount is 106 mm (4.2 in) spread over a duration of 13 days.

May Precipitation Trends in Rotterdam

The chart displays monthly precipitation patterns in Rotterdam, 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 Rotterdam, May typically receives around 106 mm (4.2 inches) of precipitation spread over approximately 13 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 Rotterdam

In Rotterdam in May humidity is 76%. With an average temperature of 15°C (59°F), this humidity feels like a heavy blanket wrapping around you, making outdoor activities less enjoyable and often leading to a quick sense of fatigue while traveling.

May Average Humidity in Rotterdam

This chart illustrates the average monthly humidity levels in Rotterdam, 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 Rotterdam is approximately 76%, 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 Rotterdam

In Rotterdam in May, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Rotterdam.

Maximum UV Index Levels in Rotterdam for May

The chart shows the monthly maximum UV Index (UVI) for Rotterdam 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 Rotterdam typically reaches 9, which falls under the very high exposure category.

Data source: Rotterdam 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 Rotterdam Compares to Other Months

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

This table compares monthly weather conditions in Rotterdam, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-3°C (26°F)	73 mm (2.9 inches)	89%	moderate
February Weather	-2°C (29°F)	92 mm (3.6 inches)	88%	moderate
March Weather	2°C (35°F)	81 mm (3.2 inches)	86%	high
April Weather	8°C (47°F)	131 mm (5.2 inches)	84%	very high
May Weather	15°C (59°F)	106 mm (4.2 inches)	76%	very high
June Weather	20°C (68°F)	117 mm (4.6 inches)	72%	very high
July Weather	23°C (73°F)	152 mm (6.0 inches)	66%	very high
August Weather	22°C (71°F)	125 mm (4.9 inches)	64%	very high
September Weather	18°C (64°F)	109 mm (4.3 inches)	72%	high
October Weather	12°C (53°F)	148 mm (5.8 inches)	81%	high
November Weather	4°C (39°F)	96 mm (3.8 inches)	87%	moderate
December Weather	-1°C (31°F)	96 mm (3.8 inches)	84%	low