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September Weather in Farmington, United States

Last updated: June 24, 2025

In September, the average temperature in Farmington, United States hovers around 21°C (70°F). Expect a minimum of 6°C (44°F) and a maximum of 35°C (95°F). During this month, you’ll also encounter 111 mm (4.4 in) of precipitation spread over 7 days, accompanied by an average humidity of 78%. Stay prepared for a mix of weather conditions!

September Temperature in Farmington

In September in Farmington, the average temperature is 21°C (70°F). Maximums can reach 35°C (95°F), while minimums can drop as low as 6°C (44°F). This varied climate makes Farmington an ideal destination for travelers looking to experience both warm and cool weather during their visit.

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

The chart illustrates September temperature patterns in Farmington, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Farmington, September typically has an average temperature of 21°C (70°F), with highs reaching up to 35°C (95°F) and lows dropping to around 6°C (44°F).
JanFebMarAprMayJunJulAugSepOctNovDec252842516475787570554034
Data source: Temperature data for Farmington 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 Farmington

In Farmington in September, the precipitation amount is 111 mm (4.4 in) over the course of 7 days.

September Precipitation Trends in Farmington

The chart displays monthly precipitation patterns in Farmington, 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 Farmington, September typically receives around 111 mm (4.4 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec5457958816712973771111235043
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Farmington

In Farmington in September, humidity is 78%. With an average temperature of 21°C (70°F), this humidity feels like a warm, enveloping blanket that can leave travelers feeling sticky and slightly fatigued, making it important to stay hydrated and take frequent breaks from outdoor activities.

September Average Humidity in Farmington

This chart illustrates the average monthly humidity levels in Farmington, 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 Farmington is approximately 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec81%81%81%82%78%81%79%77%78%79%87%84%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Farmington

In Farmington 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 Farmington.

Maximum UV Index Levels in Farmington for September

The chart shows the monthly maximum UV Index (UVI) for Farmington 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 Farmington typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec35689111098642
Data source: Farmington 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 Farmington Compares to Other Months

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

This table compares monthly weather conditions in Farmington, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-4°C (26°F)54 mm (2.1 inches)81%moderate
February Weather-2°C (28°F)57 mm (2.2 inches)81%moderate
March Weather5°C (42°F)95 mm (3.7 inches)81%high
April Weather10°C (51°F)88 mm (3.5 inches)82%very high
May Weather18°C (64°F)167 mm (6.6 inches)78%very high
June Weather24°C (75°F)128 mm (5.1 inches)81%extreme
July Weather26°C (78°F)73 mm (2.9 inches)79%very high
August Weather24°C (75°F)77 mm (3.0 inches)77%very high
September Weather21°C (70°F)111 mm (4.4 inches)78%very high
October Weather13°C (55°F)123 mm (4.9 inches)78%high
November Weather5°C (40°F)50 mm (2.0 inches)87%moderate
December Weather1°C (34°F)43 mm (1.7 inches)84%low

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