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August Weather in Sullivan, United States

Last updated: June 24, 2025

In August, the average temperature in Sullivan, United States hovers around 24°C (76°F). Expect a range where the minimum dips to 13°C (55°F) and the maximum can soar to 36°C (96°F). Visitors should prepare for some rain, as 126 mm (5.0 in) of precipitation typically falls over 12 days of the month. With an average humidity of 80%, it’s a time to enjoy the lush scenery, but don’t forget your umbrella!

August Temperature in Sullivan

In August in Sullivan, the average temperature is 24°C (76°F), with maximums reaching 36°C (96°F) and minimums dropping to as low as 13°C (55°F). This pleasant climate makes Sullivan an ideal destination for travelers seeking both warmth and comfortable evenings.

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 36°C (96°F) and lows dropping to around 13°C (55°F).
JanFebMarAprMayJunJulAugSepOctNovDec333647556675797572594540
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 precipitation amount is 126 mm (5.0 in) over the course of 12 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 126 mm (5.0 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec768412813216587100127531076856
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 80%. With an average temperature of 24°C (76°F), this humidity feels like a warm, sticky embrace that can make exploring outdoors quite draining, so it's essential to stay hydrated and take breaks in the shade while traveling.

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 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%80%80%80%82%83%81%80%76%76%85%86%
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 reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more 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 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3569101111109753
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 Weather1°C (33°F)76 mm (3.0 inches)82%moderate
February Weather2°C (36°F)84 mm (3.3 inches)80%moderate
March Weather8°C (48°F)128 mm (5.1 inches)80%high
April Weather13°C (55°F)132 mm (5.2 inches)80%very high
May Weather19°C (66°F)165 mm (6.5 inches)82%very high
June Weather24°C (76°F)87 mm (3.4 inches)83%extreme
July Weather26°C (79°F)100 mm (3.9 inches)81%extreme
August Weather24°C (76°F)126 mm (5.0 inches)80%very high
September Weather22°C (72°F)53 mm (2.1 inches)76%very high
October Weather15°C (59°F)107 mm (4.2 inches)76%high
November Weather7°C (45°F)68 mm (2.7 inches)85%moderate
December Weather4°C (40°F)56 mm (2.2 inches)86%moderate

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