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May Weather in Sidney, United States

Last updated: June 24, 2025

In May, the average temperature in Sidney, United States hovers around 18°C (64°F), with temperatures fluctuating between a cool 3°C (37°F) and a sweltering 38°C (100°F). Expect around 147 mm (5.8 in) of precipitation over the course of 15 days, creating a humidity level of approximately 78%. Make sure to prepare for varying weather conditions during your stay!

May Temperature in Sidney

In May in Sidney, the average temperature is 18°C (64°F). Maximum temperatures can reach 38°C (100°F), while the minimum can drop as low as 3°C (37°F). This wide range of temperatures makes Sidney an ideal destination for travelers who enjoy varying weather conditions and outdoor activities.

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 18°C (64°F), with highs reaching up to 38°C (100°F) and lows dropping to around 3°C (37°F).
JanFebMarAprMayJunJulAugSepOctNovDec262743526477797570544133
Data source: Temperature data for Sidney generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

May Precipitation in Sidney

In Sidney in May, the precipitation amount is 147 mm (5.8 in) over a span of 15 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 147 mm (5.8 inches) of precipitation spread over approximately 15 days.
JanFebMarAprMayJunJulAugSepOctNovDec3432946214711191102951512934
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Sidney

In Sidney in May, humidity is 78%. With an average temperature of 18°C (64°F), this humidity feels like a warm, thick blanket wrapping around you, making traveling feel a bit sticky and sluggish, yet the coolness of the air tempers the intensity, inviting you to explore at a leisurely pace.

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 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec76%80%73%75%78%82%83%81%75%75%82%83%
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 reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check 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 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356910101098643
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.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (26°F)34 mm (1.3 inches)76%moderate
February Weather-3°C (27°F)32 mm (1.3 inches)80%moderate
March Weather6°C (43°F)94 mm (3.7 inches)73%high
April Weather11°C (52°F)62 mm (2.4 inches)74%very high
May Weather18°C (64°F)147 mm (5.8 inches)78%very high
June Weather25°C (77°F)111 mm (4.4 inches)82%very high
July Weather26°C (79°F)91 mm (3.6 inches)83%very high
August Weather24°C (76°F)102 mm (4.0 inches)80%very high
September Weather21°C (71°F)95 mm (3.7 inches)75%very high
October Weather12°C (54°F)151 mm (5.9 inches)75%high
November Weather5°C (41°F)29 mm (1.2 inches)82%moderate
December Weather0°C (33°F)34 mm (1.3 inches)83%moderate

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