Weather forecast for tomorrowGann Valley, SD

Weather forecast for tomorrow

Monday Oct 19, 2026

66°F
41°F

Sunny

Precip. probability: 2%
Precipitation: 0"
Wind: 11mphE 85°
Humidity: 57%
UV index: 3
Sunrise: 7:55 am CDT
Sunset: 6:45 pm CDT
details ▼

Tomorrow, on Monday, skies will stay clear and sunny.
The maximum temperature will be an enjoyable 66.2°F, while the minimum forecasted temperature is an icy 41°F.
Sunrise will be at 7:55 am and sunset at 6:45 pm; tomorrow's daylight will last for 10h and 50min.

Hourly overview

Hourly temperatures

Warmest hour: 3 pm 64°C.
Coldest hour: 6 am 43°C.

Chance of precipitation

Highest chance: 9 pm 3%.

Hourly weather forecast

12 am

50°F
Feels like:
46°F

Partly Cloudy

Precip. probability: 1%
Precipitation: 0"
Wind: 9mphNNE 32°
Humidity: 64%
Pressure: 30.15"Hg
Visibility: 10mi
UV index: 0
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2 am

46°F
Feels like:
43°F

Partly Cloudy

Precip. probability: 1%
Precipitation: 0"
Wind: 9mphNE 36°
Humidity: 68%
Pressure: 30.15"Hg
Visibility: 10mi
UV index: 0
details ▼

4 am

45°F
Feels like:
39°F

Partly Cloudy

Precip. probability: 1%
Precipitation: 0"
Wind: 10mphNE 38°
Humidity: 69%
Pressure: 30.18"Hg
Visibility: 10mi
UV index: 0
details ▼

6 am

43°F
Feels like:
36°F

Partly Cloudy

Precip. probability: 1%
Precipitation: 0"
Wind: 10mphNE 44°
Humidity: 76%
Pressure: 30.21"Hg
Visibility: 10mi
UV index: 0
details ▼

Sunrise: 7:55 am

8 am

43°F
Feels like:
36°F

Sunny

Precip. probability: 2%
Precipitation: 0"
Wind: 9mphNE 52°
Humidity: 79%
Pressure: 30.21"Hg
Visibility: 10mi
UV index: 0
details ▼

10 am

50°F
Feels like:
45°F

Sunny

Precip. probability: 1%
Precipitation: 0"
Wind: 10mphENE 66°
Humidity: 68%
Pressure: 30.24"Hg
Visibility: 10mi
UV index: 1
details ▼

12 pm

59°F
Feels like:
57°F

Sunny

Precip. probability: 0%
Precipitation: 0"
Wind: 10mphE 84°
Humidity: 53%
Pressure: 30.21"Hg
Visibility: 10mi
UV index: 3
details ▼

2 pm

64°F
Feels like:
63°F

Sunny

Precip. probability: 0%
Precipitation: 0"
Wind: 10mphE 101°
Humidity: 44%
Pressure: 30.18"Hg
Visibility: 10mi
UV index: 3
details ▼

4 pm

64°F
Feels like:
64°F

Sunny

Precip. probability: 0%
Precipitation: 0"
Wind: 10mphESE 113°
Humidity: 44%
Pressure: 30.12"Hg
Visibility: 10mi
UV index: 2
details ▼

6 pm

63°F
Feels like:
61°F

Sunny

Precip. probability: 0%
Precipitation: 0"
Wind: 8mphESE 110°
Humidity: 49%
Pressure: 30.12"Hg
Visibility: 10mi
UV index: 0
details ▼

Sunset: 6:45 pm

8 pm

54°F
Feels like:
52°F

Clear

Precip. probability: 2%
Precipitation: 0"
Wind: 6mphESE 112°
Humidity: 64%
Pressure: 30.15"Hg
Visibility: 10mi
UV index: 0
details ▼

10 pm

50°F
Feels like:
46°F

Clear

Precip. probability: 3%
Precipitation: 0"
Wind: 7mphSE 124°
Humidity: 74%
Pressure: 30.18"Hg
Visibility: 10mi
UV index: 0
details ▼

Tomorrow, on Monday, a combination of clear and dull weather is anticipated.
The temperature will vary between the lowest temperature of 41°F and the highest temperature of 64.4°F. The warmest part of the day will be from 2 pm to 5 pm.

Updated: Oct 18, 2026 @ 12:52:48 UTC
Published by: Weather U.S. | About Us
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Weather Forecasting & Climate