Weather forecast for 10 daysCoster, IA

Weather forecast for the weekend

Saturday Oct 17, 2026

  • min.
  • 39°F
Clear
Clear
  • Precip. probability: 4%
  • Precipitation: 0"
  • Wind: 16mphSSW 196°
  • Humidity: 63%
  • UV index: 0
  • Sunrise: 7:26 am CDT
  • Sunset: 6:25 pm CDT
  • ▼
During the late afternoon and into the evening, the forecast calls for endless blue skies and perfectly clear weather.
The lowest forecasted temperature is an icy 39.2°F.
Sunrise was at 7:26 am and sunset will be at 6:25 pm; the daylight will last for 10h and 59min.

Sunday Oct 18, 2026

  • 64°F
  • 39°F
Sunny
Sunny
  • Precip. probability: 4%
  • Precipitation: 0"
  • Wind: 17mphSSW 195°
  • Humidity: 54%
  • UV index: 4
  • Sunrise: 7:27 am CDT
  • Sunset: 6:23 pm CDT
  • ▼
Tomorrow, expect consistent sunshine and open skies.
Temperatures will oscillate between an enjoyable 64.4°F at their highest and a wintry 39.2°F at their lowest.
Tomorrow's peak is anticipated to be slightly warmer than the regular high for October at 58.3°F.
Sunrise will be at 7:27 am and sunset at 6:23 pm; tomorrow's daylight will last for 10h and 56min.

10-day overview

Daily temperatures

Maximum temperature: 73°C.
Coldest day: tomorrow 64°C.

Chance of precipitation

Highest chance: 15%.

Long-term weather forecast

  • Saturday
  • Oct 17, 2026
  • min.
  • 39°F
Clear
Clear
  • Precip. probability: 4%
  • Precipitation: 0"
  • Wind: 16mphSSW 196°
  • Humidity: 63%
  • UV index: 0
  • Sunrise: 7:26 am CDT
  • Sunset: 6:25 pm CDT
  • ▼
  • Sunday
  • Oct 18, 2026
  • 64°F
  • 39°F
Sunny
Sunny
  • Precip. probability: 4%
  • Precipitation: 0"
  • Wind: 17mphSSW 195°
  • Humidity: 54%
  • UV index: 4
  • Sunrise: 7:27 am CDT
  • Sunset: 6:23 pm CDT
  • ▼
  • Monday
  • Oct 19, 2026
  • 68°F
  • 41°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 8%
  • Precipitation: 0"
  • Wind: 9mphS 172°
  • Humidity: 62%
  • UV index: 4
  • Sunrise: 7:29 am CDT
  • Sunset: 6:22 pm CDT
  • ▼
  • Tuesday
  • Oct 20, 2026
  • 68°F
  • 45°F
Mostly Sunny
Mostly Sunny
  • Precip. probability: 7%
  • Precipitation: 0"
  • Wind: 9mphSSE 150°
  • Humidity: 62%
  • UV index: 4
  • Sunrise: 7:30 am CDT
  • Sunset: 6:20 pm CDT
  • ▼
  • Wednesday
  • Oct 21, 2026
  • 72°F
  • 46°F
Mostly Sunny
Mostly Sunny
  • Precip. probability: 15%
  • Precipitation: 0"
  • Wind: 7mphS 183°
  • Humidity: 64%
  • UV index: 4
  • Sunrise: 7:31 am CDT
  • Sunset: 6:19 pm CDT
  • ▼
  • Thursday
  • Oct 22, 2026
  • 73°F
  • 48°F
Mostly Sunny
Mostly Sunny
  • Precip. probability: 7%
  • Precipitation: 0"
  • Wind: 7mphSSE 150°
  • Humidity: 64%
  • UV index: 3
  • Sunrise: 7:32 am CDT
  • Sunset: 6:17 pm CDT
  • ▼
  • Friday
  • Oct 23, 2026
  • 73°F
  • 54°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 6%
  • Precipitation: 0"
  • Wind: 13mphSSE 151°
  • Humidity: 61%
  • UV index: 3
  • Sunrise: 7:33 am CDT
  • Sunset: 6:16 pm CDT
  • ▼
  • Saturday
  • Oct 24, 2026
  • 73°F
  • 52°F
Mostly Cloudy
Mostly Cloudy
  • Precip. probability: 6%
  • Precipitation: 0"
  • Wind: 14mphSSE 164°
  • Humidity: 56%
  • UV index: 3
  • Sunrise: 7:35 am CDT
  • Sunset: 6:14 pm CDT
  • ▼
  • Sunday
  • Oct 25, 2026
  • 72°F
  • 48°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 15%
  • Precipitation: 0"
  • Wind: 9mphSW 226°
  • Humidity: 58%
  • UV index: 3
  • Sunrise: 7:36 am CDT
  • Sunset: 6:13 pm CDT
  • ▼
  • Monday
  • Oct 26, 2026
  • 73°F
  • 46°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 9%
  • Precipitation: 0"
  • Wind: 9mphESE 114°
  • Humidity: 55%
  • UV index: 3
  • Sunrise: 7:37 am CDT
  • Sunset: 6:11 pm CDT
  • ▼
It is expected that a combination of gloomy and clear weather is predicted.
Rainfall is not anticipated in Coster in the upcoming period.
In the coming days, the maximum temperature will range between 64.4°F and 73.4°F, while the difference in minimum temperatures will be substantial, as temperatures overnight will fluctuate from 39.2°F up to 53.6°F.
The warmest days will be Thursday through next Saturday and Monday, with a maximum of 73.4°F; the coldest day will be Sunday, with a maximum of 64.4°F.
Updated: Oct 17, 2026 @ 20:07:41 UTC
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate

Frequently asked questions

On Sunday, sunny and dry conditions are anticipated.

Tomorrow, the highest temperature will be 64.4°F, while the lowest temperature will be 39.2°F.
The maximum temperature tomorrow will be moderately higher than the average highest temperature in October. The lowest temperature will be also a few degrees lower than the average low of 43.2°F.

On Sunday, in Coster, sunrise will be at 7:27 am and sunset at 6:23 pm (CDT).

In Coster, Iowa, the length of the day tomorrow will be 10h and 56min.