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August Weather in Rosslyn, United States

Last updated: June 24, 2025

In Rosslyn, United States, the average temperature in August hovers around 25°C (77°F), with a minimum of 14°C (58°F) and a peak at 37°C (99°F). This month sees about 140 mm (5.5 in) of precipitation spread across 15 days, contributing to an average humidity of 72%.

August Temperature in Rosslyn

In August in Rosslyn, the average temperature is 25°C (77°F). Maximum temperatures can reach as high as 37°C (99°F), while minimums can drop to as low as 14°C (58°F). This pleasant range makes Rosslyn a great destination for travelers looking to enjoy warm weather while still having the option for cooler evenings.

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

The chart illustrates August temperature patterns in Rosslyn, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Rosslyn, August typically has an average temperature of 25°C (77°F), with highs reaching up to 37°C (99°F) and lows dropping to around 14°C (58°F).
JanFebMarAprMayJunJulAugSepOctNovDec374146566675807772624740
Data source: Temperature data for Rosslyn 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 Rosslyn

In Rosslyn in August, the total precipitation amount is 140 mm (5.5 in) over a span of 15 days.

August Precipitation Trends in Rosslyn

The chart displays monthly precipitation patterns in Rosslyn, 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 Rosslyn, August typically receives around 140 mm (5.5 inches) of precipitation spread over approximately 15 days.
JanFebMarAprMayJunJulAugSepOctNovDec619887100127118157140951058193
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Rosslyn

In Rosslyn in August, humidity is 72%. With an average temperature of 25°C (77°F), this humidity feels like a warm embrace that clings to your skin, making outdoor exploration both vibrant and a bit taxing as you sweat slightly more and seek shade often while enjoying the scenery.

August Average Humidity in Rosslyn

This chart illustrates the average monthly humidity levels in Rosslyn, 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 Rosslyn is approximately 72%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%83%83%81%78%79%74%72%75%81%85%84%
Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Rosslyn

In Rosslyn 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 Rosslyn.

Maximum UV Index Levels in Rosslyn for August

The chart shows the monthly maximum UV Index (UVI) for Rosslyn 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 Rosslyn typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec357910101098753
Data source: Rosslyn 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 Rosslyn Compares to Other Months

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

This table compares monthly weather conditions in Rosslyn, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather3°C (37°F)61 mm (2.4 inches)84%moderate
February Weather5°C (41°F)98 mm (3.9 inches)83%moderate
March Weather8°C (46°F)87 mm (3.4 inches)83%high
April Weather14°C (57°F)100 mm (4.0 inches)81%very high
May Weather19°C (66°F)127 mm (5.0 inches)78%very high
June Weather24°C (75°F)118 mm (4.7 inches)79%very high
July Weather27°C (81°F)157 mm (6.2 inches)74%very high
August Weather25°C (77°F)140 mm (5.5 inches)72%very high
September Weather22°C (72°F)95 mm (3.8 inches)75%very high
October Weather17°C (62°F)104 mm (4.1 inches)81%high
November Weather8°C (47°F)81 mm (3.2 inches)85%moderate
December Weather5°C (41°F)93 mm (3.7 inches)84%moderate

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