October Weather in Hillsborough, United States

Last updated: June 24, 2025

In October, the average temperature in Hillsborough, United States hovers around 18°C (65°F). While you may enjoy mild days, temperatures can swing from a chilly 2°C (36°F) to a sweltering 36°C (98°F). Be prepared for some rain, as the area receives about 97 mm (3.8 in) of precipitation over 9 days, coupled with an average humidity of 80%.

October Temperature in Hillsborough

In October in Hillsborough, the average temperature is 18°C (65°F). Maximum temperatures can reach 36°C (98°F), while minimums can dip as low as 2°C (36°F). Be prepared for a wide range of temperatures when traveling during this time.

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

The chart illustrates October temperature patterns in Hillsborough, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Hillsborough, October typically has an average temperature of 18°C (65°F), with highs reaching up to 36°C (98°F) and lows dropping to around 2°C (36°F).

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

October Precipitation in Hillsborough

In Hillsborough in October, the total precipitation amount reaches 97 mm (3.8 in) over the course of 9 days.

October Precipitation Trends in Hillsborough

The chart displays monthly precipitation patterns in Hillsborough, 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 Hillsborough, October typically receives around 97 mm (3.8 inches) of precipitation spread over approximately 9 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 Hillsborough

In Hillsborough in October, humidity is 80%. With an average temperature of 18°C (65°F), this humidity feels like wandering through a warm, damp blanket, making every step slightly heavy and resulting in a constant sheen of sweat, which can be both refreshing and exhausting for travelers.

October Average Humidity in Hillsborough

This chart illustrates the average monthly humidity levels in Hillsborough, 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 Hillsborough is approximately 80%, 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 Hillsborough

In Hillsborough in October, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Hillsborough.

Maximum UV Index Levels in Hillsborough for October

The chart shows the monthly maximum UV Index (UVI) for Hillsborough 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 Hillsborough typically reaches 8, which falls under the very high exposure category.

Data source: Hillsborough 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 Hillsborough Compares to Other Months

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

This table compares monthly weather conditions in Hillsborough, showing how October’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	6°C (43°F)	89 mm (3.5 inches)	85%	moderate
February Weather	9°C (48°F)	117 mm (4.6 inches)	82%	high
March Weather	11°C (53°F)	84 mm (3.3 inches)	81%	very high
April Weather	16°C (62°F)	116 mm (4.6 inches)	80%	very high
May Weather	21°C (70°F)	118 mm (4.6 inches)	81%	extreme
June Weather	24°C (76°F)	121 mm (4.8 inches)	81%	extreme
July Weather	27°C (80°F)	114 mm (4.5 inches)	81%	extreme
August Weather	26°C (78°F)	128 mm (5.1 inches)	80%	very high
September Weather	23°C (74°F)	128 mm (5.1 inches)	79%	very high
October Weather	18°C (65°F)	97 mm (3.8 inches)	80%	very high
November Weather	10°C (51°F)	81 mm (3.2 inches)	85%	moderate
December Weather	8°C (46°F)	107 mm (4.2 inches)	86%	moderate