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May Weather in Sidney, United States

Last updated: June 24, 2025

In Sidney, United States, the average temperature in May hovers around 14°C (57°F), offering a mild climate that can swing dramatically. Expect minimum temperatures to dip to -4°C (25°F) while occasional warm spells can reach a toasty 34°C (93°F). With 116 mm (4.6 in) of precipitation spread over 14 days, be prepared for some rain, and with an average humidity of 74%, the air can feel quite damp.

May Temperature in Sidney

In May in Sidney, the average temperature is 14°C (57°F), with maximums that can reach 34°C (93°F) and minimums that can drop as low as -4°C (25°F). This variety in temperature makes Sidney an ideal destination for travelers seeking a mix of warm and cool experiences.

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 14°C (57°F), with highs reaching up to 34°C (93°F) and lows dropping to around -4°C (25°F).
JanFebMarAprMayJunJulAugSepOctNovDec323041475771767367494235
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 total precipitation amount is 116 mm (4.6 in) spread over a duration of 14 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 116 mm (4.6 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec1218635811651483126312114
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 74%. With an average temperature of 14°C (57°F), this humidity feels like a warm, damp blanket wrapping around you, making it slightly uncomfortable for traveling, as you may find yourself quickly sweating and in need of frequent breaks to cool down.

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 74%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec72%76%62%60%74%82%82%84%75%73%74%77%
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.
JanFebMarAprMayJunJulAugSepOctNovDec3579101111109643
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 Weather0°C (32°F)12 mm (0.5 inches)72%moderate
February Weather-1°C (30°F)18 mm (0.7 inches)76%moderate
March Weather5°C (42°F)63 mm (2.5 inches)61%high
April Weather9°C (48°F)58 mm (2.3 inches)60%very high
May Weather14°C (57°F)116 mm (4.6 inches)74%very high
June Weather22°C (71°F)51 mm (2.0 inches)82%extreme
July Weather24°C (76°F)48 mm (1.9 inches)82%extreme
August Weather23°C (73°F)31 mm (1.2 inches)84%very high
September Weather19°C (67°F)26 mm (1.0 inches)75%very high
October Weather9°C (49°F)31 mm (1.2 inches)73%high
November Weather6°C (42°F)21 mm (0.8 inches)74%moderate
December Weather1°C (35°F)14 mm (0.6 inches)77%moderate

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