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September Weather in Altamont, United States

Last updated: June 24, 2025

In September, the average temperature in Altamont, United States hovers around 24°C (75°F), providing a comfortable climate for outdoor activities. However, be prepared for a range of temperatures, with a minimum of 7°C (45°F) and a maximum reaching 35°C (94°F). The month sees about 86 mm (3.4 in) of precipitation spread over 7 days, contributing to an average humidity of 67%. Whether you're basking in the warmth or staying dry, Altamont offers a dynamic experience this time of year.

September Temperature in Altamont

In September in Altamont, the average temperature is 24°C (75°F). Maximum temperatures can reach up to 35°C (94°F), while minimums can drop to as low as 7°C (45°F). Travelers should be prepared for a range of temperatures and pack accordingly.

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

The chart illustrates September temperature patterns in Altamont, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Altamont, September typically has an average temperature of 24°C (75°F), with highs reaching up to 35°C (94°F) and lows dropping to around 7°C (45°F).
JanFebMarAprMayJunJulAugSepOctNovDec363851576878817975604842
Data source: Temperature data for Altamont 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 Altamont

In Altamont in September, the total precipitation amount is 86 mm (3.4 in) over a span of 7 days.

September Precipitation Trends in Altamont

The chart displays monthly precipitation patterns in Altamont, 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 Altamont, September typically receives around 86 mm (3.4 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec646012311424799101115861344836
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Altamont

In Altamont in September humidity is 67%. With an average temperature of 24°C (75°F), this humidity feels like a warm and sticky embrace, making traveling a bit uncomfortable as you find yourself seeking shade and refreshing drinks more often.

September Average Humidity in Altamont

This chart illustrates the average monthly humidity levels in Altamont, 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 Altamont is approximately 67%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec77%76%71%74%83%83%81%73%67%72%82%85%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Altamont

In Altamont 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 Altamont.

Maximum UV Index Levels in Altamont for September

The chart shows the monthly maximum UV Index (UVI) for Altamont 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 Altamont typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec35710101111109753
Data source: Altamont 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 Altamont Compares to Other Months

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

This table compares monthly weather conditions in Altamont, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather2°C (36°F)64 mm (2.5 inches)77%moderate
February Weather3°C (38°F)60 mm (2.3 inches)76%moderate
March Weather10°C (51°F)123 mm (4.8 inches)71%high
April Weather14°C (58°F)114 mm (4.5 inches)73%very high
May Weather20°C (68°F)247 mm (9.7 inches)83%very high
June Weather26°C (78°F)99 mm (3.9 inches)83%extreme
July Weather27°C (82°F)101 mm (4.0 inches)81%extreme
August Weather26°C (79°F)115 mm (4.5 inches)73%very high
September Weather24°C (75°F)86 mm (3.4 inches)67%very high
October Weather16°C (60°F)134 mm (5.3 inches)72%high
November Weather9°C (48°F)48 mm (1.9 inches)82%moderate
December Weather6°C (42°F)36 mm (1.4 inches)85%moderate

Compare Altamont's Climate with Cities Worldwide