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September Weather in Yale, United States

Last updated: June 24, 2025

In Yale, United States, the average temperature in September hovers around 18°C (64°F). Expect a range with minimums dipping to 4°C (40°F) and maximums soaring to 31°C (88°F). During this month, the region typically experiences 83 mm (3.3 in) of precipitation spread across 11 days, with an average humidity level of 80%.

September Temperature in Yale

In September in Yale, the average temperature is 18°C (64°F). Maximum temperatures can reach 31°C (88°F), while minimum temperatures can drop to as low as 4°C (40°F). This variability makes Yale a versatile destination, perfect for travelers looking to enjoy both warm days and cool evenings.

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

The chart illustrates September temperature patterns in Yale, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Yale, September typically has an average temperature of 18°C (64°F), with highs reaching up to 31°C (88°F) and lows dropping to around 4°C (40°F).
JanFebMarAprMayJunJulAugSepOctNovDec262734435465717064533932
Data source: Temperature data for Yale 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 Yale

In Yale in September, the precipitation amount is 83 mm (3.3 in) over the course of 11 days.

September Precipitation Trends in Yale

The chart displays monthly precipitation patterns in Yale, 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 Yale, September typically receives around 83 mm (3.3 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec717470103102928088841197861
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Yale

In Yale in September humidity is 80%. With an average temperature of 18°C (64°F), this humidity feels like a warm, damp blanket wrapping around you, making travel a bit more exhausting as the air thickens and the heat clings to your skin.

September Average Humidity in Yale

This chart illustrates the average monthly humidity levels in Yale, 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 Yale is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%87%85%86%80%80%80%81%80%84%90%86%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Yale

In Yale 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 Yale.

Maximum UV Index Levels in Yale for September

The chart shows the monthly maximum UV Index (UVI) for Yale 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 Yale typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2458910997532
Data source: Yale 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 Yale Compares to Other Months

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

This table compares monthly weather conditions in Yale, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (26°F)70 mm (2.8 inches)88%low
February Weather-3°C (27°F)74 mm (2.9 inches)87%moderate
March Weather1°C (34°F)70 mm (2.7 inches)85%moderate
April Weather6°C (43°F)103 mm (4.1 inches)86%very high
May Weather12°C (54°F)102 mm (4.0 inches)80%very high
June Weather18°C (65°F)92 mm (3.6 inches)80%very high
July Weather22°C (72°F)80 mm (3.1 inches)80%very high
August Weather21°C (71°F)88 mm (3.5 inches)80%very high
September Weather18°C (64°F)83 mm (3.3 inches)80%high
October Weather12°C (54°F)119 mm (4.7 inches)84%moderate
November Weather4°C (39°F)78 mm (3.1 inches)89%moderate
December Weather0°C (32°F)61 mm (2.4 inches)86%low

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