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October Weather in Boston, Ireland

Last updated: August 23, 2025

In October, the average temperature in Boston, Ireland hovers around 11°C (52°F), with a minimum dipping to 0°C (33°F) and occasionally peaking at 19°C (67°F). Expect considerable precipitation, with 121 mm (4.8 in) expected over 18 days, leading to a high average humidity of 91%. 🌧️

October Temperature in Boston

In October in Boston, the average temperature is 11°C (52°F). Maximums can reach 19°C (67°F) and minimums can be as low as 0°C (33°F). This mild climate makes it an ideal time for exploring the area's outdoor attractions and enjoying local activities.

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

The chart illustrates October temperature patterns in Boston, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Boston, October typically has an average temperature of 11°C (52°F), with highs reaching up to 19°C (67°F) and lows dropping to around 0°C (33°F).
JanFebMarAprMayJunJulAugSepOctNovDec434445485357605956514745
Data source: Temperature data for Boston 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 Boston

In Boston in October, the precipitation amount is 121 mm (4.8 in) distributed over 18 days.

October Precipitation Trends in Boston

The chart displays monthly precipitation patterns in Boston, 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 Boston, October typically receives around 121 mm (4.8 inches) of precipitation spread over approximately 18 days.
JanFebMarAprMayJunJulAugSepOctNovDec8613811261687684133102121105131
Data source: Precipitation data for October generated using information from the Copernicus Climate Change Service.
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October Humidity in Boston

In Boston in October, humidity is 91%. With an average temperature of 11°C (52°F), this humidity feels like a damp chill that clings to your skin, making it essential to dress in layers and plan for cozy indoor activities rather than lengthy outdoor explorations.

October Average Humidity in Boston

This chart illustrates the average monthly humidity levels in Boston, 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 Boston is approximately 91%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%88%87%86%83%83%85%85%88%91%92%89%
Data source: Humidity data for October generated using information from the Copernicus Climate Change Service.

October UV Index in Boston

In Boston in October, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Boston, you can check the information here.

Maximum UV Index Levels in Boston for October

The chart shows the monthly maximum UV Index (UVI) for Boston 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 Boston typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec124578875321
Data source: Boston 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 Boston Compares to Other Months

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

This table compares monthly weather conditions in Boston, showing how October’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather6°C (44°F)86 mm (3.4 inches)88%low
February Weather7°C (44°F)138 mm (5.4 inches)88%low
March Weather7°C (45°F)112 mm (4.4 inches)87%moderate
April Weather9°C (49°F)61 mm (2.4 inches)86%moderate
May Weather12°C (53°F)68 mm (2.7 inches)83%high
June Weather14°C (57°F)76 mm (3.0 inches)83%very high
July Weather16°C (60°F)84 mm (3.3 inches)85%very high
August Weather15°C (59°F)133 mm (5.2 inches)85%high
September Weather13°C (56°F)102 mm (4.0 inches)88%moderate
October Weather11°C (52°F)121 mm (4.8 inches)91%moderate
November Weather8°C (47°F)105 mm (4.1 inches)92%low
December Weather7°C (45°F)131 mm (5.2 inches)89%low

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