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August Weather in Annandale, United States

Last updated: June 24, 2025

In August, the average temperature in Annandale, United States hovers around 21°C (70°F). Expect delightful days with temperatures ranging from a minimum of 11°C (51°F) to a maximum of 32°C (91°F). However, don’t forget your umbrella, as 149 mm (5.9 in) of precipitation may grace the area over 12 days. With an average humidity of 81%, prepare for a pleasantly warm and slightly humid climate!

August Temperature in Annandale

In August in Annandale, the average temperature is 21°C (70°F), with maximums reaching up to 32°C (91°F) and minimums dropping as low as 11°C (51°F). This pleasant weather makes Annandale an ideal destination for travelers looking to enjoy moderate temperatures and outdoor activities.

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

The chart illustrates August temperature patterns in Annandale, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Annandale, August typically has an average temperature of 21°C (70°F), with highs reaching up to 32°C (91°F) and lows dropping to around 11°C (51°F).
JanFebMarAprMayJunJulAugSepOctNovDec151632425871747063473222
Data source: Temperature data for Annandale 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 Annandale

In Annandale in August, the precipitation amount is 149 mm (5.9 in) spread over 12 days.

August Precipitation Trends in Annandale

The chart displays monthly precipitation patterns in Annandale, 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 Annandale, August typically receives around 149 mm (5.9 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec2127538310574931491131033144
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Annandale

In Annandale in August, humidity is 81%. With an average temperature of 21°C (70°F), this humidity feels like a warm, sticky embrace, making outdoor activities slightly uncomfortable and necessitating frequent breaks in the shade or air conditioning for a refreshing escape.

August Average Humidity in Annandale

This chart illustrates the average monthly humidity levels in Annandale, 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 Annandale is approximately 81%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%90%85%84%78%80%81%81%81%84%88%84%
Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Annandale

In Annandale 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 Annandale.

Maximum UV Index Levels in Annandale for August

The chart shows the monthly maximum UV Index (UVI) for Annandale 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 Annandale typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2457910997532
Data source: Annandale 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 Annandale Compares to Other Months

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

This table compares monthly weather conditions in Annandale, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-9°C (15°F)21 mm (0.8 inches)87%low
February Weather-9°C (16°F)27 mm (1.0 inches)90%moderate
March Weather0°C (32°F)53 mm (2.1 inches)85%moderate
April Weather6°C (42°F)83 mm (3.3 inches)84%high
May Weather15°C (59°F)105 mm (4.1 inches)78%very high
June Weather22°C (71°F)74 mm (2.9 inches)80%very high
July Weather23°C (74°F)93 mm (3.7 inches)81%very high
August Weather21°C (70°F)149 mm (5.9 inches)81%very high
September Weather17°C (63°F)113 mm (4.5 inches)81%high
October Weather9°C (48°F)103 mm (4.0 inches)84%moderate
November Weather0°C (32°F)31 mm (1.2 inches)88%moderate
December Weather-6°C (22°F)44 mm (1.7 inches)84%low

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