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August Weather in Dorchester, United States

Last updated: June 24, 2025

In August, the average temperature in Dorchester, United States is a pleasant 19°C (67°F). However, be prepared for temperature fluctuations, as it can dip to a minimum of 6°C (43°F) and soar to a maximum of 32°C (89°F). During this month, expect about 133 mm (5.3 in) of precipitation spread over 13 days, contributing to an average humidity of 78%. Perfect weather for those who enjoy a mix of warm days and occasional refreshing rain!

August Temperature in Dorchester

In August in Dorchester, the average temperature is 19°C (67°F). Maximum temperatures can reach 32°C (89°F), while minimums can drop as low as 6°C (43°F). This climate makes Dorchester an ideal destination for travelers seeking a mix of warm days and cool evenings.

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

The chart illustrates August temperature patterns in Dorchester, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Dorchester, August typically has an average temperature of 19°C (67°F), with highs reaching up to 32°C (89°F) and lows dropping to around 6°C (43°F).
JanFebMarAprMayJunJulAugSepOctNovDec161631415667716761463222
Data source: Temperature data for Dorchester 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 Dorchester

In Dorchester in August, the precipitation amount is 133 mm (5.3 in) over the course of 13 days.

August Precipitation Trends in Dorchester

The chart displays monthly precipitation patterns in Dorchester, 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 Dorchester, August typically receives around 133 mm (5.3 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec34525498118107127133901205154
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Dorchester

In Dorchester in August humidity is 78%. With an average temperature of 19°C (67°F), this humidity feels like a warm, heavy blanket enveloping you, making traveling feel both sticky and sluggish as you navigate through the day.

August Average Humidity in Dorchester

This chart illustrates the average monthly humidity levels in Dorchester, 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 Dorchester is approximately 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%89%86%85%79%80%80%78%80%84%89%85%
Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Dorchester

In Dorchester 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 Dorchester.

Maximum UV Index Levels in Dorchester for August

The chart shows the monthly maximum UV Index (UVI) for Dorchester 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 Dorchester typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2457810997532
Data source: Dorchester 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 Dorchester Compares to Other Months

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

This table compares monthly weather conditions in Dorchester, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-9°C (16°F)34 mm (1.3 inches)88%low
February Weather-9°C (17°F)52 mm (2.1 inches)89%moderate
March Weather-1°C (31°F)54 mm (2.1 inches)86%moderate
April Weather5°C (42°F)98 mm (3.9 inches)85%high
May Weather14°C (57°F)118 mm (4.7 inches)79%very high
June Weather19°C (67°F)107 mm (4.2 inches)80%very high
July Weather22°C (71°F)127 mm (5.0 inches)80%very high
August Weather19°C (67°F)133 mm (5.3 inches)78%very high
September Weather16°C (61°F)90 mm (3.5 inches)80%high
October Weather8°C (47°F)120 mm (4.7 inches)84%moderate
November Weather0°C (32°F)51 mm (2.0 inches)89%moderate
December Weather-5°C (23°F)54 mm (2.1 inches)85%low

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