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September Weather in Troy, United States

Last updated: June 24, 2025

In September, the average temperature in Troy, United States hovers around 18°C (64°F). Here, you can expect minimum temperatures dipping to 0°C (33°F) and peaking at a warm 33°C (91°F). With an average precipitation of 83 mm (3.3 in) spread over 8 days, the air carries a humidity level of about 71%.

September Temperature in Troy

In September in Troy, the average temperature is 18°C (64°F), with maximums reaching 33°C (91°F) and minimums dropping as low as 0°C (33°F). This wide temperature range makes it essential for travelers to pack layers to ensure comfort throughout their stay.

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

The chart illustrates September temperature patterns in Troy, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Troy, September typically has an average temperature of 18°C (64°F), with highs reaching up to 33°C (91°F) and lows dropping to around 0°C (33°F).
JanFebMarAprMayJunJulAugSepOctNovDec262834465768737164523930
Data source: Temperature data for Troy 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 Troy

In Troy in September, the precipitation amount reaches 83 mm (3.3 in) over the course of 8 days.

September Precipitation Trends in Troy

The chart displays monthly precipitation patterns in Troy, 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 Troy, September typically receives around 83 mm (3.3 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec74867912484751238483133100117
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Troy

In Troy in September, humidity is 71%. With an average temperature of 18°C (64°F), this humidity feels like a warm embrace, making traveling a bit sticky but still pleasant as the warmth envelops you, urging you to explore the vibrant surroundings while staying hydrated.

September Average Humidity in Troy

This chart illustrates the average monthly humidity levels in Troy, 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 Troy is approximately 71%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%84%82%80%72%72%67%66%71%79%84%81%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Troy

In Troy in September, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Troy.

Maximum UV Index Levels in Troy for September

The chart shows the monthly maximum UV Index (UVI) for Troy 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 Troy typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3468910997632
Data source: Troy 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 Troy Compares to Other Months

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

This table compares monthly weather conditions in Troy, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (26°F)74 mm (2.9 inches)86%moderate
February Weather-2°C (29°F)86 mm (3.4 inches)84%moderate
March Weather1°C (34°F)79 mm (3.1 inches)82%high
April Weather8°C (46°F)124 mm (4.9 inches)80%very high
May Weather14°C (58°F)84 mm (3.3 inches)72%very high
June Weather20°C (68°F)75 mm (3.0 inches)72%very high
July Weather23°C (73°F)123 mm (4.9 inches)67%very high
August Weather22°C (71°F)83 mm (3.3 inches)66%very high
September Weather18°C (64°F)83 mm (3.3 inches)71%high
October Weather11°C (53°F)133 mm (5.3 inches)78%high
November Weather4°C (39°F)100 mm (3.9 inches)84%moderate
December Weather-1°C (30°F)117 mm (4.6 inches)81%low

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