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September Weather in Litchfield, United States

Last updated: June 24, 2025

In Litchfield, United States, the average temperature in September hovers around 18°C (65°F), making it a pleasant time to visit. However, be prepared for variations, as temperatures can dip to a cool 3°C (37°F) or soar to a warm 33°C (91°F). During this month, you can expect about 125 mm (4.9 in) of precipitation spread over 9 days, contributing to an average humidity level of 68%. Pack accordingly to make the most of your stay!

September Temperature in Litchfield

In September in Litchfield, the average temperature is 18°C (65°F), with maximums reaching 33°C (91°F) and minimums falling as low as 3°C (37°F). This makes it an ideal time for travelers who enjoy mild to warm weather, but it's wise to pack for both warm days and cooler evenings.

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

The chart illustrates September temperature patterns in Litchfield, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Litchfield, September typically has an average temperature of 18°C (65°F), with highs reaching up to 33°C (91°F) and lows dropping to around 3°C (37°F).
JanFebMarAprMayJunJulAugSepOctNovDec283137485868737265554133
Data source: Temperature data for Litchfield 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 Litchfield

In Litchfield in September, the total precipitation amount is 125 mm (4.9 in) recorded over a span of 9 days.

September Precipitation Trends in Litchfield

The chart displays monthly precipitation patterns in Litchfield, 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 Litchfield, September typically receives around 125 mm (4.9 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec74959013112010415111212515096119
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Litchfield

In Litchfield in September, humidity is 68%. With an average temperature of 18°C (65°F), this humidity feels like a warm, enveloping blanket, making travel somewhat sticky and requiring occasional breaks for refreshing hydration.

September Average Humidity in Litchfield

This chart illustrates the average monthly humidity levels in Litchfield, 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 Litchfield is approximately 68%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%82%81%78%70%69%62%65%68%74%82%80%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Litchfield

In Litchfield 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 Litchfield.

Maximum UV Index Levels in Litchfield for September

The chart shows the monthly maximum UV Index (UVI) for Litchfield 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 Litchfield typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356810101098642
Data source: Litchfield 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 Litchfield Compares to Other Months

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

This table compares monthly weather conditions in Litchfield, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (29°F)74 mm (2.9 inches)84%moderate
February Weather0°C (32°F)95 mm (3.8 inches)82%moderate
March Weather3°C (37°F)90 mm (3.5 inches)81%high
April Weather9°C (48°F)131 mm (5.2 inches)78%very high
May Weather15°C (59°F)120 mm (4.7 inches)69%very high
June Weather20°C (68°F)104 mm (4.1 inches)69%very high
July Weather23°C (73°F)151 mm (5.9 inches)62%very high
August Weather22°C (72°F)112 mm (4.4 inches)65%very high
September Weather18°C (65°F)125 mm (4.9 inches)68%very high
October Weather13°C (55°F)150 mm (5.9 inches)74%high
November Weather5°C (41°F)96 mm (3.8 inches)82%moderate
December Weather0°C (33°F)119 mm (4.7 inches)80%low

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