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September Weather in Orange, United States

Last updated: June 24, 2025

In September, the average temperature in Orange, United States hovers around 22°C (72°F), offering a pleasant climate for outdoor activities. However, be prepared for temperature fluctuations, with a minimum of 5°C (42°F) and a maximum that can reach up to 37°C (100°F). Rainfall isn’t uncommon during this month, with an average precipitation of 93 mm (3.7 in) spread across 10 days. Additionally, expect a comfortable average humidity level of 68%, making it an ideal time to explore the region.

September Temperature in Orange

In September, in Orange, the average temperature is 22°C (72°F). Maximum can reach 37°C (100°F), and minimum can be as low as 5°C (42°F). This range makes it an ideal destination for travelers looking to enjoy both warm and mild weather.

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

The chart illustrates September temperature patterns in Orange, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Orange, September typically has an average temperature of 22°C (72°F), with highs reaching up to 37°C (100°F) and lows dropping to around 5°C (42°F).
JanFebMarAprMayJunJulAugSepOctNovDec384348586775817872634842
Data source: Temperature data for Orange 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 Orange

In Orange in September, the precipitation amount is 93 mm (3.7 in) over the course of 10 days.

September Precipitation Trends in Orange

The chart displays monthly precipitation patterns in Orange, 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 Orange, September typically receives around 93 mm (3.7 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec63887110811211270127931067784
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Orange

In Orange in September humidity is 68%. With an average temperature of 22°C (72°F), this humidity feels like a warm embrace, slightly stifling but still manageable for traveling, creating an atmosphere that encourages leisurely outdoor activities while prompting occasional breaks for refreshment.

September Average Humidity in Orange

This chart illustrates the average monthly humidity levels in Orange, 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 Orange is approximately 68%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%86%86%84%78%79%70%59%68%80%87%85%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Orange

In Orange in September, 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 Orange.

Maximum UV Index Levels in Orange for September

The chart shows the monthly maximum UV Index (UVI) for Orange 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 Orange typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec357911101098753
Data source: Orange 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 Orange Compares to Other Months

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

This table compares monthly weather conditions in Orange, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather3°C (38°F)63 mm (2.5 inches)86%moderate
February Weather6°C (43°F)88 mm (3.5 inches)86%moderate
March Weather9°C (48°F)70 mm (2.8 inches)86%high
April Weather14°C (58°F)107 mm (4.2 inches)84%very high
May Weather20°C (67°F)111 mm (4.4 inches)78%extreme
June Weather24°C (75°F)112 mm (4.4 inches)79%very high
July Weather27°C (81°F)70 mm (2.8 inches)70%very high
August Weather25°C (78°F)127 mm (5.0 inches)59%very high
September Weather22°C (72°F)93 mm (3.7 inches)68%very high
October Weather17°C (63°F)106 mm (4.2 inches)80%high
November Weather9°C (48°F)77 mm (3.0 inches)86%moderate
December Weather5°C (42°F)84 mm (3.3 inches)85%moderate

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