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August Weather in Sullivan, United States

Last updated: June 24, 2025

In August, the average temperature in Sullivan, United States is a pleasant 24°C (76°F). Expect a range where temperatures can dip to a cool 12°C (54°F) at night, while reaching a warm 35°C (95°F) during the day. Be prepared for about 95 mm (3.8 in) of precipitation spread over 9 days, resulting in a generally humid atmosphere with an average humidity of 82%.

August Temperature in Sullivan

In August in Sullivan, the average temperature is 24°C (76°F), with maximums reaching 35°C (95°F) and minimums dropping as low as 12°C (54°F). This mild climate makes Sullivan an ideal destination for travelers looking to enjoy outdoor activities while experiencing comfortable weather.

August Weather in Sullivan: Daily Temperature Highs, Lows, and Averages

The chart illustrates August temperature patterns in Sullivan, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sullivan, August typically has an average temperature of 24°C (76°F), with highs reaching up to 35°C (95°F) and lows dropping to around 12°C (54°F).
JanFebMarAprMayJunJulAugSepOctNovDec323646556776797672604338
Data source: Temperature data for Sullivan 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.

August Precipitation in Sullivan

In Sullivan in August, the total precipitation amount is 95 mm (3.8 in) over the course of 9 days.

August Precipitation Trends in Sullivan

The chart displays monthly precipitation patterns in Sullivan, with values for each month alongside August’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August’s conditions compare to those of other months. In Sullivan, August typically receives around 95 mm (3.8 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec9010312712213011311195689510495
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Sullivan

In Sullivan in August, humidity is 82%. With an average temperature of 24°C (76°F), this humidity feels like wearing a warm, damp blanket, making travel uncomfortable and sticky as you explore.

August Average Humidity in Sullivan

This chart illustrates the average monthly humidity levels in Sullivan, with August’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In August, average humidity in Sullivan is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%82%84%83%80%83%82%83%79%79%88%87%
Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Sullivan

In Sullivan in August, 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 Sullivan.

Maximum UV Index Levels in Sullivan for August

The chart shows the monthly maximum UV Index (UVI) for Sullivan in August, 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 August, the maximum UV index in Sullivan typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356910111098643
Data source: Sullivan August 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 August Weather in Sullivan Compares to Other Months

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

This table compares monthly weather conditions in Sullivan, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather0°C (33°F)90 mm (3.6 inches)84%moderate
February Weather2°C (36°F)103 mm (4.1 inches)82%moderate
March Weather8°C (46°F)127 mm (5.0 inches)84%high
April Weather13°C (55°F)122 mm (4.8 inches)83%very high
May Weather19°C (67°F)130 mm (5.1 inches)80%very high
June Weather24°C (76°F)113 mm (4.4 inches)83%extreme
July Weather26°C (79°F)111 mm (4.4 inches)82%very high
August Weather24°C (76°F)95 mm (3.8 inches)82%very high
September Weather22°C (72°F)68 mm (2.7 inches)79%very high
October Weather15°C (60°F)95 mm (3.7 inches)79%high
November Weather6°C (44°F)104 mm (4.1 inches)88%moderate
December Weather3°C (39°F)94 mm (3.7 inches)87%moderate

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