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September Weather in Mountainair, United States

Last updated: June 24, 2025

In September, the average temperature in Mountainair, United States hovers around 19°C (67°F). Expect a minimum of 1°C (34°F) and a maximum reaching up to 32°C (91°F). The month sees about 40 mm (1.6 in) of precipitation over roughly 5 days, contributing to an average humidity of 72%. Stay prepared for a mix of comfortable and occasional wet weather!

September Temperature in Mountainair

In September in Mountainair, the average temperature is 19°C (67°F). Maximums can reach 32°C (91°F), and minimums can be as low as 1°C (34°F). This diverse temperature range makes Mountainair a great destination for travelers seeking both warm days and cool evenings.

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

The chart illustrates September temperature patterns in Mountainair, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Mountainair, September typically has an average temperature of 19°C (67°F), with highs reaching up to 32°C (91°F) and lows dropping to around 1°C (34°F).
JanFebMarAprMayJunJulAugSepOctNovDec343746546473737266554536
Data source: Temperature data for Mountainair 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 Mountainair

In Mountainair in September, the precipitation amount is 40 mm (1.6 in) over the course of 5 days.

September Precipitation Trends in Mountainair

The chart displays monthly precipitation patterns in Mountainair, 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 Mountainair, September typically receives around 40 mm (1.6 inches) of precipitation spread over approximately 5 days.
JanFebMarAprMayJunJulAugSepOctNovDec212823231426634040371815
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Mountainair

In Mountainair in September, humidity is 72%. With an average temperature of 19°C (67°F), this humidity feels like a warm, damp blanket enveloping you, making outdoor activities a bit more challenging but also giving the air a refreshing quality that's invigorating for short excursions.

September Average Humidity in Mountainair

This chart illustrates the average monthly humidity levels in Mountainair, 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 Mountainair is approximately 72%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec78%79%66%60%57%55%57%65%72%78%81%79%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Mountainair

In Mountainair in September, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Mountainair.

Maximum UV Index Levels in Mountainair for September

The chart shows the monthly maximum UV Index (UVI) for Mountainair 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 Mountainair typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec5710111213131211864
Data source: Mountainair 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 Mountainair Compares to Other Months

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

This table compares monthly weather conditions in Mountainair, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather1°C (34°F)21 mm (0.8 inches)78%moderate
February Weather3°C (37°F)27 mm (1.1 inches)79%high
March Weather8°C (47°F)23 mm (0.9 inches)66%very high
April Weather12°C (55°F)23 mm (0.9 inches)60%extreme
May Weather18°C (64°F)14 mm (0.6 inches)57%extreme
June Weather23°C (73°F)26 mm (1.0 inches)55%extreme
July Weather23°C (74°F)63 mm (2.5 inches)56%extreme
August Weather22°C (72°F)40 mm (1.6 inches)65%extreme
September Weather19°C (67°F)40 mm (1.6 inches)72%extreme
October Weather13°C (55°F)37 mm (1.5 inches)78%very high
November Weather7°C (45°F)18 mm (0.7 inches)81%high
December Weather2°C (36°F)15 mm (0.6 inches)79%moderate

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