May Weather in Sidney, United States

Last updated: June 24, 2025

In May, the average temperature in Sidney, United States hovers around 13°C (55°F). Weather can be quite variable, with minimums dipping to -5°C (24°F) and maximums soaring to 33°C (92°F). Be prepared for some rain as well, with an expected 53 mm (2.1 in) of precipitation over 8 days. Don't forget, the average humidity is a cozy 77%, making it feel quite muggy at times!

May Temperature in Sidney

In May in Sidney, the average temperature is 13°C (55°F), with maximums reaching 33°C (92°F) and minimums dropping as low as -5°C (24°F). Therefore, travelers should be prepared for a wide range of temperatures and pack accordingly.

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

The chart illustrates May temperature patterns in Sidney, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sidney, May typically has an average temperature of 13°C (55°F), with highs reaching up to 33°C (92°F) and lows dropping to around -5°C (24°F).

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

May Precipitation in Sidney

In Sidney in May, the total precipitation amount is 53 mm (2.1 in) over the course of 8 days.

May Precipitation Trends in Sidney

The chart displays monthly precipitation patterns in Sidney, 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 Sidney, May typically receives around 53 mm (2.1 inches) of precipitation spread over approximately 8 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

May Humidity in Sidney

In Sidney in May humidity is 77%. With an average temperature of 13°C (55°F), this humidity feels like a damp chill in the air, making travel somewhat uncomfortable as the moisture clings to your skin and adds a heavier weight to your clothing, which can sap your energy as you explore.

May Average Humidity in Sidney

This chart illustrates the average monthly humidity levels in Sidney, 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 Sidney is approximately 77%, 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 Sidney

In Sidney in May, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Sidney.

Maximum UV Index Levels in Sidney for May

The chart shows the monthly maximum UV Index (UVI) for Sidney 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 Sidney typically reaches 8, which falls under the very high exposure category.

Data source: Sidney 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 Sidney Compares to Other Months

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

This table compares monthly weather conditions in Sidney, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-8°C (17°F)	10 mm (0.4 inches)	83%	low
February Weather	-11°C (13°F)	22 mm (0.8 inches)	86%	moderate
March Weather	-1°C (31°F)	21 mm (0.8 inches)	77%	moderate
April Weather	5°C (41°F)	25 mm (1.0 inches)	72%	very high
May Weather	13°C (55°F)	53 mm (2.1 inches)	77%	very high
June Weather	19°C (67°F)	67 mm (2.6 inches)	79%	very high
July Weather	23°C (73°F)	38 mm (1.5 inches)	78%	very high
August Weather	21°C (70°F)	39 mm (1.5 inches)	74%	very high
September Weather	15°C (60°F)	60 mm (2.3 inches)	68%	high
October Weather	6°C (43°F)	30 mm (1.2 inches)	70%	moderate
November Weather	-1°C (31°F)	19 mm (0.7 inches)	80%	moderate
December Weather	-6°C (22°F)	18 mm (0.7 inches)	84%	low