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August Weather in Monrovia, United States

Last updated: June 24, 2025

In Monrovia, United States, the average temperature in August hovers around 23°C (74°F). Expect a range from a cool 11°C (53°F) to a warm 34°C (94°F). During this month, rainfall is not uncommon, with 107 mm (4.2 in) of precipitation expected over 9 days. Additionally, average humidity is around 70%, contributing to a pleasantly warm atmosphere.

August Temperature in Monrovia

In August in Monrovia, the average temperature is 23°C (74°F). Maximum can reach 34°C (94°F) and minimum can be as low as 11°C (53°F). This climate makes Monrovia an ideal destination for travelers seeking warm and pleasant weather.

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

The chart illustrates August temperature patterns in Monrovia, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Monrovia, August typically has an average temperature of 23°C (74°F), with highs reaching up to 34°C (94°F) and lows dropping to around 11°C (53°F).
JanFebMarAprMayJunJulAugSepOctNovDec313443526473777470584237
Data source: Temperature data for Monrovia 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 Monrovia

In Monrovia in August, the precipitation amount is 107 mm (4.2 in), occurring over a span of 9 days.

August Precipitation Trends in Monrovia

The chart displays monthly precipitation patterns in Monrovia, 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 Monrovia, August typically receives around 107 mm (4.2 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec8696129102131121108107741009888
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Monrovia

In Monrovia in August humidity is 70%. With an average temperature of 23°C (74°F), this humidity feels like a warm, sticky embrace, making outdoor activities somewhat challenging but still bearable for traveling.

August Average Humidity in Monrovia

This chart illustrates the average monthly humidity levels in Monrovia, 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 Monrovia is approximately 70%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%85%86%84%79%82%79%70%69%76%88%87%
Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Monrovia

In Monrovia 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 Monrovia.

Maximum UV Index Levels in Monrovia for August

The chart shows the monthly maximum UV Index (UVI) for Monrovia 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 Monrovia typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec357910111098643
Data source: Monrovia 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 Monrovia Compares to Other Months

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

This table compares monthly weather conditions in Monrovia, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (31°F)86 mm (3.4 inches)87%moderate
February Weather1°C (34°F)96 mm (3.8 inches)85%moderate
March Weather6°C (43°F)129 mm (5.1 inches)86%high
April Weather11°C (53°F)102 mm (4.0 inches)84%very high
May Weather18°C (65°F)131 mm (5.2 inches)79%very high
June Weather23°C (74°F)121 mm (4.8 inches)82%extreme
July Weather25°C (77°F)108 mm (4.3 inches)79%very high
August Weather23°C (74°F)107 mm (4.2 inches)70%very high
September Weather21°C (70°F)74 mm (2.9 inches)69%very high
October Weather14°C (58°F)100 mm (3.9 inches)76%high
November Weather5°C (42°F)98 mm (3.8 inches)88%moderate
December Weather3°C (37°F)88 mm (3.5 inches)87%moderate

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