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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 19°C (67°F), with a minimum of 4°C (39°F) and a maximum of 35°C (95°F). Expect about 30 mm (1.2 in) of precipitation spread over 3 days, and enjoy relatively low humidity levels averaging 46%.

September Temperature in Farmington

In September in Farmington, the average temperature is 19°C (67°F). Maximums can reach 35°C (95°F), and minimums can be as low as 4°C (39°F). This diverse temperature range makes Farmington an ideal destination for travelers looking to enjoy both warm days and cool evenings.

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 19°C (67°F), with highs reaching up to 35°C (95°F) and lows dropping to around 4°C (39°F).
JanFebMarAprMayJunJulAugSepOctNovDec293241495871797766504130
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 30 mm (1.2 in) over the course of 3 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 30 mm (1.2 inches) of precipitation spread over approximately 3 days.
JanFebMarAprMayJunJulAugSepOctNovDec54605262491671330413748
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 46%. With an average temperature of 19°C (67°F), this humidity feels like a comfortable embrace, making it pleasant for traveling and exploring, though a light jacket might be advisable for the evening chill.

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 46%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%92%84%75%62%56%44%37%46%67%84%88%
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 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check 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 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3579101111109643
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-1°C (30°F)54 mm (2.1 inches)91%moderate
February Weather0°C (33°F)60 mm (2.4 inches)92%moderate
March Weather5°C (42°F)52 mm (2.1 inches)84%high
April Weather10°C (49°F)62 mm (2.4 inches)74%very high
May Weather15°C (59°F)48 mm (1.9 inches)62%very high
June Weather22°C (71°F)16 mm (0.6 inches)56%extreme
July Weather26°C (80°F)7 mm (0.3 inches)44%extreme
August Weather25°C (77°F)13 mm (0.5 inches)37%very high
September Weather19°C (67°F)30 mm (1.2 inches)46%very high
October Weather10°C (50°F)41 mm (1.6 inches)67%high
November Weather5°C (41°F)37 mm (1.5 inches)84%moderate
December Weather-1°C (30°F)48 mm (1.9 inches)88%moderate

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