Weather forecast for 10 daysWatertown, SD

Weather forecast for the weekend

Sunday Oct 18, 2026

  • 66°F
  • 39°F
Sunny
Sunny
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 13mphWSW 258°
  • Humidity: 46%
  • UV index: 3
  • Sunrise: 7:48 am CDT
  • Sunset: 6:38 pm CDT
  • ▼
On Sunday, in Watertown, sunny skies are in store, with excellent visibility.
Significant temperature variations are anticipated, soaring to a maximum of a comfortable 66.2°F and descending to a minimum of a cold 39.2°F.
Today, expect conditions that are warmer than normal, with a temperature that reflects September's typical maximum of 71.6°F.
Sunrise was at 7:48 am and sunset will be at 6:38 pm; the daylight will last for 10h and 50min.

10-day overview

Daily temperatures

Warmest day: Thursday 75°C.
Coldest period: Sunday - Monday 57°C.

Chance of precipitation

Highest chance: 24%.

Long-term weather forecast

  • Sunday
  • Oct 18, 2026
  • 66°F
  • 39°F
Sunny
Sunny
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 13mphWSW 258°
  • Humidity: 46%
  • UV index: 3
  • Sunrise: 7:48 am CDT
  • Sunset: 6:38 pm CDT
  • ▼
  • Monday
  • Oct 19, 2026
  • 64°F
  • 43°F
Sunny
Sunny
  • Precip. probability: 2%
  • Precipitation: 0"
  • Wind: 11mphE 82°
  • Humidity: 55%
  • UV index: 3
  • Sunrise: 7:49 am CDT
  • Sunset: 6:37 pm CDT
  • ▼
  • Tuesday
  • Oct 20, 2026
  • 70°F
  • 46°F
Sunny
Sunny
  • Precip. probability: 8%
  • Precipitation: 0"
  • Wind: 16mphS 169°
  • Humidity: 61%
  • UV index: 3
  • Sunrise: 7:50 am CDT
  • Sunset: 6:35 pm CDT
  • ▼
  • Wednesday
  • Oct 21, 2026
  • 70°F
  • 45°F
Mostly Sunny
Mostly Sunny
  • Precip. probability: 15%
  • Precipitation: 0"
  • Wind: 7mphESE 110°
  • Humidity: 67%
  • UV index: 3
  • Sunrise: 7:52 am CDT
  • Sunset: 6:33 pm CDT
  • ▼
  • Thursday
  • Oct 22, 2026
  • 75°F
  • 57°F
Mostly Sunny
Mostly Sunny
  • Precip. probability: 8%
  • Precipitation: 0"
  • Wind: 11mphSE 141°
  • Humidity: 67%
  • UV index: 3
  • Sunrise: 7:53 am CDT
  • Sunset: 6:32 pm CDT
  • ▼
  • Friday
  • Oct 23, 2026
  • 72°F
  • 57°F
Mostly Cloudy / Wind
Mostly Cloudy / Wind
  • Precip. probability: 18%
  • Precipitation: 0.04"
  • Wind: 23mphSSE 163°
  • Humidity: 55%
  • UV index: 2
  • Sunrise: 7:54 am CDT
  • Sunset: 6:30 pm CDT
  • ▼
  • Saturday
  • Oct 24, 2026
  • 61°F
  • 41°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 24%
  • Precipitation: 0"
  • Wind: 14mphWSW 256°
  • Humidity: 66%
  • UV index: 2
  • Sunrise: 7:56 am CDT
  • Sunset: 6:28 pm CDT
  • ▼
  • Sunday
  • Oct 25, 2026
  • 57°F
  • 43°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 7%
  • Precipitation: 0"
  • Wind: 9mphE 84°
  • Humidity: 61%
  • UV index: 3
  • Sunrise: 7:57 am CDT
  • Sunset: 6:27 pm CDT
  • ▼
  • Monday
  • Oct 26, 2026
  • 57°F
  • 48°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 19%
  • Precipitation: 0"
  • Wind: 12mphSE 133°
  • Humidity: 75%
  • UV index: 3
  • Sunrise: 7:58 am CDT
  • Sunset: 6:25 pm CDT
  • ▼
  • Tuesday
  • Oct 27, 2026
  • 61°F
  • 46°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 24%
  • Precipitation: 0"
  • Wind: 14mphSSE 153°
  • Humidity: 71%
  • UV index: 2
  • Sunrise: 8:00 am CDT
  • Sunset: 6:24 pm CDT
  • ▼
For the next ten days, a combination of mostly clear and cloud-filled weather is anticipated.
With a 18% probability, rainfall is expected only on Friday. The precipitation will be minimal at 0.04".
Temperature differences will be noticeable in the next ten days. The maximum temperature will vary between 57.2°F and 75.2°F, while the lowest nightly temperature differences will be also quite pronounced, as nighttime lows are forecast to fall between 39.2°F and 57.2°F.
Expect the warmest day on Thursday, with temperatures peaking at 75.2°F; next Sunday and Monday, with the highest temperature of 57.2°F, will be the coldest days.
Updated: Oct 18, 2026 @ 14:13:38 UTC
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate

Frequently asked questions

Today, sunshine will likely continue with scattered clouds at most.

Today, the maximum temperature will be 66.2°F, while the minimum temperature will be 39.2°F.
Today, the highest temperature will be uncommonly higher than the average maximum of 54.3°F in October. The lowest temperature will be in line with the average low of 39°F.

On Sunday, in Watertown, sunrise was at 7:48 am and sunset will be at 6:38 pm (CDT).

Today in Watertown, the daylight will last for 10h and 50min.