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September Weather in Cynthiana, United States

Last updated: June 24, 2025

In Cynthiana, United States, the average temperature in September is a pleasant 21°C (71°F). However, temperatures can range from a cool 7°C (45°F) to a warm 35°C (96°F). Visitors can expect about 122 mm (4.8 in) of precipitation over 9 days, contributing to an average humidity level of 73%.

September Temperature in Cynthiana

In September in Cynthiana, the average temperature is 21°C (71°F), with maximums reaching up to 35°C (96°F) and minimums dropping as low as 7°C (45°F). This makes it an ideal time for travelers to enjoy a variety of outdoor activities while experiencing comfortable weather conditions.

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

The chart illustrates September temperature patterns in Cynthiana, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Cynthiana, September typically has an average temperature of 21°C (71°F), with highs reaching up to 35°C (96°F) and lows dropping to around 7°C (45°F).
JanFebMarAprMayJunJulAugSepOctNovDec353946556673777570594540
Data source: Temperature data for Cynthiana 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 Cynthiana

In Cynthiana in September, the precipitation amount is 122 mm (4.8 in) over a span of 9 days.

September Precipitation Trends in Cynthiana

The chart displays monthly precipitation patterns in Cynthiana, 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 Cynthiana, September typically receives around 122 mm (4.8 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec911311271391311851159812210788125
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Cynthiana

In Cynthiana in September humidity is 73%. With an average temperature of 21°C (71°F), this humidity feels like a warm, enveloping blanket that can make outdoor activities a bit uncomfortable, but with proper hydration and breaks in the shade, it’s still manageable for traveling.

September Average Humidity in Cynthiana

This chart illustrates the average monthly humidity levels in Cynthiana, 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 Cynthiana is approximately 73%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%88%87%85%81%82%81%73%73%78%89%87%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Cynthiana

In Cynthiana 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 Cynthiana.

Maximum UV Index Levels in Cynthiana for September

The chart shows the monthly maximum UV Index (UVI) for Cynthiana 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 Cynthiana typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3579101010108653
Data source: Cynthiana 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 Cynthiana Compares to Other Months

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

This table compares monthly weather conditions in Cynthiana, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather2°C (35°F)90 mm (3.6 inches)88%moderate
February Weather4°C (39°F)131 mm (5.2 inches)88%moderate
March Weather8°C (47°F)127 mm (5.0 inches)87%high
April Weather13°C (55°F)139 mm (5.5 inches)85%very high
May Weather19°C (66°F)131 mm (5.2 inches)81%very high
June Weather23°C (73°F)185 mm (7.3 inches)82%very high
July Weather25°C (77°F)115 mm (4.5 inches)81%very high
August Weather24°C (75°F)98 mm (3.8 inches)73%very high
September Weather21°C (71°F)122 mm (4.8 inches)73%very high
October Weather15°C (60°F)107 mm (4.2 inches)78%high
November Weather7°C (45°F)88 mm (3.5 inches)89%moderate
December Weather4°C (40°F)125 mm (4.9 inches)87%moderate

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