October weather forecast
Watertown, SD

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Weather in October

In October, Watertown ushers in autumn in earnest, with moderate temperatures and the first signs of winter creeping in. The weather brings forth a chilly 54.3°F (12.4°C), setting the tone for colder months ahead. The transformation of foliage into a spectacle of fiery reds and oranges decorates the city's landscape thickly. October rings in a distinctly festive season in Watertown, with Halloween celebrations standing out amid the specter of coming winter.

Temperature

October's arrival witnesses a distinct temperature drop, receding from September's agreeable 71.6°F (22°C) to a fresh 54.3°F (12.4°C). Watertown's average low-temperature is measured at an icy 39°F (3.9°C) during October.

Humidity

September and October, with an average relative humidity of 68%, are the least humid months.

Rainfall

In October, the rain falls for 8.3 days. Throughout October, 1.73" (44mm) of precipitation is accumulated. In Watertown, South Dakota, during the entire year, the rain falls for 112.3 days and collects up to 18.78" (477mm) of precipitation.

Snowfall

Months with snowfall in Watertown are January through May, October through December. October is the first month it typically snows. Throughout October, in the average 2.3 snowfall days, it receives 0.94" (24mm) of snow. Throughout the year, there are 64.3 snowfall days, and 17.56" (446mm) of snow is accumulated.

Daylight

The average length of the day in October in Watertown, South Dakota, is 10h and 57min.
On the first day of the month, sunrise is at 7:27 am and sunset at 7:08 pm. On the last day of October, in Watertown, sunrise is at 8:06 am and sunset at 6:17 pm CDT.

Sunshine

In October, the average sunshine in Watertown is 6h.

UV index

The average daily maximum UV index in October is 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for ordinary individuals.
Note: The daily maximum UV index of 2 in October interprets into the following advice:
Those with sensitive skin, infants, and children require constant safeguarding from prolonged sun exposure. It's recommended to limit sun exposure when its radiation is at its peak during midday. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses. Alert! The snow's reflection can amplify the UV radiation of the Sun nearly twice.
Updated: Feb 14, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the average October temperature in Watertown?

During October, Watertown experiences an average high-temperature of 54.3°F (12.4°C) and a low-temperature of 39°F (3.9°C). The average heat index (a.k.a. 'feels like', 'felt air temperature'), which represents the influence of relative humidity on air temperature, in July is appraised at 84.2°F (29°C).

What is the least humid month in Watertown?

The months with the lowest humidity are September and October, with an average relative humidity of 68%.

What is the average humidity in October in Watertown?

The average relative humidity in October is 68%.

How much does it rain in Watertown in October?

In Watertown, in October, during 8.3 rainfall days, 1.73" (44mm) of precipitation is typically accumulated.

When does it start to snow in Watertown?

October is the first month it typically snows in Watertown, South Dakota. Throughout October, in the average 2.3 snowfall days, it receives 0.94" (24mm) of snow.

What is the average length of the day in October in Watertown?

In October, the average day length in Watertown, South Dakota, is 10h and 57min.

When is the sunrise / sunset in October in Watertown?

In October, on the first day of the month, sunrise is at 7:27 am and sunset at 7:08 pm. On the last day of the month, in Watertown, sunrise is at 8:06 am and sunset at 6:17 pm CDT.

How long on average sun shines in October in Watertown?

In October, the average sunshine duration in Watertown, South Dakota, is 6h.

What is the UV index intensity in October in Watertown?

In Watertown, South Dakota, the average daily maximum UV index in October is 2. A UV Index estimate of 2, and below, represents a low health risk from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in October
Watertown, SD

Average temperature in October - Watertown, SD
  • Average high temperature in October: 54.3°F

The warmest month (with the highest average high temperature) is July (80.8°F).
The month with the lowest average high temperature is January (19.4°F).

  • Average low temperature in October: 39°F

The month with the highest average low temperature is July (60.8°F).
The coldest month (with the lowest average low temperature) is January (5.5°F).

Average pressure in October
Watertown, SD

Average pressure in October - Watertown, SD
  • Average pressure in October: 29.98"Hg

The months with the highest atmospheric pressure are January and February (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).

Average wind speed in October
Watertown, SD

Average wind speed in October - Watertown, SD
  • Average wind speed in October: 11.2mph

The windiest month (with the highest average wind speed) is April (11.6mph).
The calmest month (with the lowest average wind speed) is July (8.5mph).

Average humidity in October
Watertown, SD

Average humidity in October - Watertown, SD
  • Average humidity in October: 68%

The month with the highest relative humidity is January (90%).
The months with the lowest relative humidity are September and October (68%).

Average rainfall in October
Watertown, SD

Average rainfall in October - Watertown, SD
  • Average rainfall in October: 1.73"

The wettest month (with the highest rainfall) is June (3.19").
The driest months (with the least rainfall) are January and February (0.59").

Average rainfall days in October
Watertown, SD

Average rainfall days in October - Watertown, SD
  • Average rainfall days in October: 8.3 days

The month with the highest number of rainy days is June (17.2 days).
The month with the least rainy days is February (2.7 days).

Average snowfall in October
Watertown, SD

Average snowfall in October - Watertown, SD
  • Average snowfall in October: 0.94"

The months with the highest snowfall are January and December (3.74").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in October
Watertown, SD

Average snowfall days in October - Watertown, SD
  • Average snowfall days in October: 2.3 days

The month with the highest number of snowfall days is January (14.4 days).
The months with the least snowfall days are June, July and August (0 days).

Average daylight in October /
Average sunshine in October
Watertown, SD

Average daylight in October / Average sunshine in October - Watertown, SD
  • Average daylight in October: 10h and 5min

The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).

  • Average sunshine in October: 6h and 0min

The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).

Average sunshine days in October
Watertown, SD

Average sunshine days in October - Watertown, SD
  • Average sunshine days in October: 19.1 days

The month with the most sunshine days is October (19.1 days).
The month with the least sunshine days is June (10.3 days).

Average UV index in October
Watertown, SD

Average UV index in October - Watertown, SD
  • Average UV index in October: 2

The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).

Average cloud cover in October
Watertown, SD

Average cloud cover in October - Watertown, SD
  • Average cloud cover in October: 37

The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is August (Cloud cover 27).

Average visibility in October
Watertown, SD

Average visibility in October - Watertown, SD
  • Average visibility in October: 6mi

The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).

Watertown, South Dakota, USA

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