October Weather in Watertown, United States

Last updated: June 24, 2025

In Watertown, United States, the average temperature in October hovers around 9°C (48°F). During this month, you can expect temperatures to dip as low as -10°C (14°F) and soar up to a comfortable 29°C (84°F). Expect about 98 mm (3.8 in) of precipitation spread over 11 days, with an average humidity of 84%.

October Temperature in Watertown

In October in Watertown, the average temperature is 9°C (48°F), with maximums reaching up to 29°C (84°F) and minimums plunging as low as -10°C (14°F). Be sure to pack layers to stay comfortable during your travels!

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

The chart illustrates October temperature patterns in Watertown, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Watertown, October typically has an average temperature of 9°C (48°F), with highs reaching up to 29°C (84°F) and lows dropping to around -10°C (14°F).

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

October Precipitation in Watertown

In Watertown in October, the precipitation amount is 98 mm (3.8 in) over the course of 11 days.

October Precipitation Trends in Watertown

The chart displays monthly precipitation patterns in Watertown, 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 Watertown, October typically receives around 98 mm (3.8 inches) of precipitation spread over approximately 11 days.

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

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Millimeters (mm) Inches (in)

October Humidity in Watertown

In Watertown in October, humidity is 84%. With an average temperature of 9°C (48°F), this humidity feels like a damp chill that envelops you, making it essential to dress in layers and stay active, as the moisture in the air can quickly lead to discomfort while traveling.

October Average Humidity in Watertown

This chart illustrates the average monthly humidity levels in Watertown, 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 Watertown is approximately 84%, 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 Watertown

In Watertown 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 Watertown.

Maximum UV Index Levels in Watertown for October

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

Data source: Watertown 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 Watertown Compares to Other Months

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

This table compares monthly weather conditions in Watertown, showing how October’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-9°C (16°F)	25 mm (1.0 inches)	87%	low
February Weather	-9°C (17°F)	29 mm (1.2 inches)	90%	moderate
March Weather	0°C (33°F)	54 mm (2.1 inches)	85%	moderate
April Weather	6°C (43°F)	83 mm (3.3 inches)	84%	high
May Weather	15°C (59°F)	112 mm (4.4 inches)	78%	very high
June Weather	22°C (72°F)	83 mm (3.3 inches)	80%	very high
July Weather	24°C (75°F)	96 mm (3.8 inches)	81%	very high
August Weather	21°C (71°F)	152 mm (6.0 inches)	81%	very high
September Weather	18°C (64°F)	113 mm (4.4 inches)	81%	high
October Weather	9°C (48°F)	98 mm (3.8 inches)	84%	moderate
November Weather	1°C (33°F)	32 mm (1.3 inches)	88%	moderate
December Weather	-5°C (23°F)	44 mm (1.7 inches)	84%	low