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October Weather in Dorchester, United States

Last updated: June 24, 2025

In Dorchester, United States, the average temperature in October is a pleasant 12°C (53°F). However, be prepared for a range, as temperatures can dip as low as -7°C (20°F) or climb to a balmy 33°C (92°F). Expect around 110 mm (4.3 in) of precipitation spread across 8 days, with an average humidity of 75% adding to the ambiance of the season.

October Temperature in Dorchester

In October in Dorchester, the average temperature is 12°C (53°F). Maximums can reach 33°C (92°F), while minimums can drop as low as -7°C (20°F). Travelers should be prepared for a wide range of temperatures, ensuring they pack appropriately for both warm and cold weather during their visit.

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

The chart illustrates October 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, October typically has an average temperature of 12°C (53°F), with highs reaching up to 33°C (92°F) and lows dropping to around -7°C (20°F).
JanFebMarAprMayJunJulAugSepOctNovDec272742516377797570534133
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.

October Precipitation in Dorchester

In Dorchester in October, the precipitation amount is 110 mm (4.3 in) over a period of 8 days.

October Precipitation Trends in Dorchester

The chart displays monthly precipitation patterns in Dorchester, with values for each month alongside October’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how October’s conditions compare to those of other months. In Dorchester, October typically receives around 110 mm (4.3 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec32269547145976582811102740
Data source: Precipitation data for October generated using information from the Copernicus Climate Change Service.
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October Humidity in Dorchester

In Dorchester in October, humidity is 75%. With an average temperature of 12°C (53°F), this humidity feels like a damp chill that clings to your skin, making leisurely exploration feel sluggish and heavy, perhaps leaving you yearning for cozy indoor retreats.

October Average Humidity in Dorchester

This chart illustrates the average monthly humidity levels in Dorchester, with October’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In October, average humidity in Dorchester is approximately 75%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec76%80%73%75%78%82%83%81%75%75%82%83%
Data source: Humidity data for October generated using information from the Copernicus Climate Change Service.

October UV Index in Dorchester

In Dorchester in October, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in Dorchester, you can refer to this Hourly UV Index in Dorchester.

Maximum UV Index Levels in Dorchester for October

The chart shows the monthly maximum UV Index (UVI) for Dorchester in October, 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 October, the maximum UV index in Dorchester typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356910111098643
Data source: Dorchester October 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 October 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 October’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 October’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (27°F)32 mm (1.3 inches)76%moderate
February Weather-3°C (27°F)26 mm (1.0 inches)80%moderate
March Weather6°C (42°F)95 mm (3.7 inches)73%high
April Weather11°C (51°F)47 mm (1.8 inches)74%very high
May Weather17°C (63°F)145 mm (5.7 inches)78%very high
June Weather25°C (77°F)97 mm (3.8 inches)82%extreme
July Weather26°C (79°F)64 mm (2.5 inches)83%very high
August Weather24°C (76°F)82 mm (3.2 inches)80%very high
September Weather21°C (70°F)81 mm (3.2 inches)75%very high
October Weather12°C (53°F)110 mm (4.3 inches)75%high
November Weather5°C (41°F)27 mm (1.1 inches)82%moderate
December Weather0°C (33°F)40 mm (1.6 inches)83%moderate

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