May Weather in Surabaya, Indonesia

Last updated: August 23, 2025

In May, the average temperature in Surabaya, Indonesia is a warm 28°C (82°F), with a minimum of 23°C (74°F) and a maximum reaching 34°C (93°F). Expect heavy precipitation totaling 242 mm (9.5 in) over 28 days, combined with an average humidity of 80%. Plan for a humid and wet experience!

May Temperature in Surabaya

In May in Surabaya, the average temperature is 28°C (82°F). Maximums can reach 34°C (93°F), while minimums can dip to as low as 23°C (74°F). This warm climate makes Surabaya an ideal destination for travelers seeking sunny weather and outdoor adventures.

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

The chart illustrates May temperature patterns in Surabaya, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Surabaya, May typically has an average temperature of 28°C (82°F), with highs reaching up to 34°C (93°F) and lows dropping to around 23°C (74°F).

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

May Precipitation in Surabaya

In Surabaya in May, the total precipitation amount is 242 mm (9.5 in) spread over a period of 28 days.

May Precipitation Trends in Surabaya

The chart displays monthly precipitation patterns in Surabaya, 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 Surabaya, May typically receives around 242 mm (9.5 inches) of precipitation spread over approximately 28 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 Surabaya

In Surabaya in May, humidity is 80%. With an average temperature of 28°C (82°F), this humidity feels like a warm, thick blanket enveloping you, making outdoor activities sweaty and demanding frequent breaks in the shade while traveling.

May Average Humidity in Surabaya

This chart illustrates the average monthly humidity levels in Surabaya, 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 Surabaya is approximately 80%, 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 Surabaya

In Surabaya 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 Surabaya.

Maximum UV Index Levels in Surabaya for May

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

Data source: Surabaya 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 Surabaya Compares to Other Months

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

This table compares monthly weather conditions in Surabaya, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	27°C (81°F)	257 mm (10.1 inches)	85%	extreme
February Weather	27°C (81°F)	325 mm (12.8 inches)	86%	extreme
March Weather	27°C (81°F)	418 mm (16.4 inches)	84%	extreme
April Weather	28°C (82°F)	318 mm (12.5 inches)	82%	extreme
May Weather	28°C (82°F)	242 mm (9.5 inches)	80%	extreme
June Weather	27°C (81°F)	198 mm (7.8 inches)	80%	extreme
July Weather	27°C (80°F)	107 mm (4.2 inches)	80%	extreme
August Weather	27°C (80°F)	77 mm (3.0 inches)	78%	extreme
September Weather	27°C (81°F)	97 mm (3.8 inches)	74%	extreme
October Weather	28°C (82°F)	118 mm (4.6 inches)	76%	extreme
November Weather	28°C (82°F)	250 mm (9.8 inches)	78%	extreme
December Weather	27°C (81°F)	340 mm (13.4 inches)	80%	extreme