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September Weather in Amarillo, United States

Last updated: June 24, 2025

In September, the average temperature in Amarillo, United States is a pleasant 22°C (72°F). However, temperatures can fluctuate dramatically, with a minimum of 2°C (36°F) and a scorching maximum of 38°C (101°F). Expect some rain, as 37 mm (1.5 in) of precipitation typically falls over about 6 days. You'll also experience an average humidity level of 72%, adding a touch of warmth to the air.

September Temperature in Amarillo

In September in Amarillo, the average temperature is 22°C (72°F). Maximums can reach 38°C (101°F), while minimums can drop as low as 2°C (36°F). Be sure to pack for a range of temperatures to ensure a comfortable trip!

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

The chart illustrates September temperature patterns in Amarillo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Amarillo, September typically has an average temperature of 22°C (72°F), with highs reaching up to 38°C (101°F) and lows dropping to around 2°C (36°F).
JanFebMarAprMayJunJulAugSepOctNovDec383950576777807872584841
Data source: Temperature data for Amarillo 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 Amarillo

In Amarillo in September, the precipitation amount is 37 mm (1.5 in) over the course of 6 days.

September Precipitation Trends in Amarillo

The chart displays monthly precipitation patterns in Amarillo, 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 Amarillo, September typically receives around 37 mm (1.5 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec221039296942394837551414
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Amarillo

In Amarillo in September humidity is 72%. With an average temperature of 22°C (72°F), this humidity feels like you are stepping into a warm, embracing blanket, making traveling feel sweaty and slightly stifling, but the balmy weather is also quite perfect for exploring local attractions.

September Average Humidity in Amarillo

This chart illustrates the average monthly humidity levels in Amarillo, 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 Amarillo is approximately 72%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec75%76%64%70%78%81%82%78%72%73%81%81%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Amarillo

In Amarillo in September, 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 Amarillo.

Maximum UV Index Levels in Amarillo for September

The chart shows the monthly maximum UV Index (UVI) for Amarillo 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 Amarillo typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec468111112121110764
Data source: Amarillo 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 Amarillo Compares to Other Months

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

This table compares monthly weather conditions in Amarillo, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather3°C (38°F)22 mm (0.9 inches)75%moderate
February Weather4°C (40°F)10 mm (0.4 inches)76%high
March Weather10°C (51°F)39 mm (1.5 inches)64%very high
April Weather14°C (57°F)29 mm (1.1 inches)70%extreme
May Weather20°C (68°F)69 mm (2.7 inches)78%extreme
June Weather25°C (77°F)42 mm (1.6 inches)81%extreme
July Weather27°C (80°F)39 mm (1.5 inches)82%extreme
August Weather26°C (78°F)48 mm (1.9 inches)78%extreme
September Weather22°C (72°F)37 mm (1.5 inches)72%very high
October Weather14°C (58°F)55 mm (2.2 inches)73%high
November Weather9°C (48°F)13 mm (0.5 inches)80%high
December Weather5°C (41°F)14 mm (0.5 inches)81%moderate

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