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September Weather in Sidney, United States

Last updated: June 24, 2025

In September, the average temperature in Sidney, United States hovers around 15°C (60°F). However, prepare for a range of temperatures; the minimum can drop to -3°C (26°F), while the maximum can soar to 35°C (96°F). Expect about 60 mm (2.3 in) of precipitation spread over 6 days, contributing to an average humidity level of 68%. 🌧️🌡️

September Temperature in Sidney

In September in Sidney, the average temperature is 15°C (60°F), with maximums reaching 35°C (96°F) and minimums plummeting to as low as -3°C (26°F). This wide temperature range makes Sidney a diverse travel destination, offering both warm and cool experiences.

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

The chart illustrates September 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, September typically has an average temperature of 15°C (60°F), with highs reaching up to 35°C (96°F) and lows dropping to around -3°C (26°F).
JanFebMarAprMayJunJulAugSepOctNovDec171330405567737059433122
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.

September Precipitation in Sidney

In Sidney, in September, the precipitation amount is 60 mm (2.3 in) over a span of 6 days.

September Precipitation Trends in Sidney

The chart displays monthly precipitation patterns in Sidney, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Sidney, September typically receives around 60 mm (2.3 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec102221255367383960301918
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Sidney

In Sidney in September humidity is 68%. With an average temperature of 15°C (60°F), this humidity feels like a warm blanket enveloping you, making it comfortable for leisurely strolls but slightly sticky if you're engaging in more strenuous activities while traveling.

September Average Humidity in Sidney

This chart illustrates the average monthly humidity levels in Sidney, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Sidney is approximately 68%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec83%86%77%72%77%79%78%74%68%70%80%84%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Sidney

In Sidney in September, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Sidney.

Maximum UV Index Levels in Sidney for September

The chart shows the monthly maximum UV Index (UVI) for Sidney in September, 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 September, the maximum UV index in Sidney typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec24598101097532
Data source: Sidney September 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 September 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 September’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 September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
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 Weather5°C (41°F)25 mm (1.0 inches)72%very high
May Weather13°C (55°F)53 mm (2.1 inches)77%very high
June Weather19°C (67°F)67 mm (2.6 inches)79%very high
July Weather23°C (73°F)38 mm (1.5 inches)78%very high
August Weather21°C (70°F)39 mm (1.5 inches)74%very high
September Weather15°C (60°F)60 mm (2.3 inches)68%high
October Weather6°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

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