October Weather in Belfast, United States

Last updated: June 24, 2025

In October, the average temperature in Belfast, United States hovers around 11°C (51°F), providing a cool yet comfortable climate. Expect minimum temperatures to drop to -2°C (29°F), while maximums can reach a pleasant 24°C (75°F). With 130 mm (5.1 in) of precipitation spread over 12 days, it’s wise to prepare for some wet weather. Additionally, the average humidity sits at a relatively high 82%, adding to the area's refreshing atmosphere.

October Temperature in Belfast

In October in Belfast, the average temperature is 11°C (51°F). The maximum can reach 24°C (75°F), and the minimum can be as low as -2°C (29°F). Be prepared for a variety of weather conditions, making it essential to pack layers for your trip.

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

The chart illustrates October temperature patterns in Belfast, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Belfast, October typically has an average temperature of 11°C (51°F), with highs reaching up to 24°C (75°F) and lows dropping to around -2°C (29°F).

Data source: Temperature data for Belfast generated using information from the Copernicus Climate Change Service.

October Precipitation in Belfast

In Belfast in October, the precipitation amount is 130 mm (5.1 in) over a span of 12 days.

October Precipitation Trends in Belfast

The chart displays monthly precipitation patterns in Belfast, 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 Belfast, October typically receives around 130 mm (5.1 inches) of precipitation spread over approximately 12 days.

Data source: Precipitation data for October generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

October Humidity in Belfast

In Belfast in October, humidity is 82%. With an average temperature of 11°C (51°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities uncomfortable and requiring additional layers to stay warm while exploring.

October Average Humidity in Belfast

This chart illustrates the average monthly humidity levels in Belfast, 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 Belfast is approximately 82%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for October generated using information from the Copernicus Climate Change Service.

October UV Index in Belfast

In Belfast in October, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in Belfast.

Maximum UV Index Levels in Belfast for October

The chart shows the monthly maximum UV Index (UVI) for Belfast 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 Belfast typically reaches 5, which falls under the moderate exposure category.

Data source: Belfast 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 Belfast Compares to Other Months

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

This table compares monthly weather conditions in Belfast, showing how October’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-4°C (24°F)	93 mm (3.7 inches)	88%	low
February Weather	-4°C (26°F)	88 mm (3.5 inches)	88%	moderate
March Weather	0°C (32°F)	72 mm (2.9 inches)	85%	moderate
April Weather	6°C (43°F)	131 mm (5.2 inches)	81%	high
May Weather	11°C (53°F)	90 mm (3.6 inches)	76%	very high
June Weather	17°C (63°F)	76 mm (3.0 inches)	74%	very high
July Weather	20°C (68°F)	91 mm (3.6 inches)	74%	very high
August Weather	20°C (68°F)	75 mm (3.0 inches)	74%	very high
September Weather	16°C (61°F)	77 mm (3.0 inches)	77%	high
October Weather	11°C (51°F)	130 mm (5.1 inches)	82%	moderate
November Weather	3°C (38°F)	121 mm (4.8 inches)	85%	moderate
December Weather	-2°C (28°F)	129 mm (5.1 inches)	84%	low