Weather forecast for 10 daysPortsmouth, IA
Weather forecast for the weekend
Sunday Oct 18, 2026
- 68°F
- 41°F
Sunny
- Precip. probability: 1%
- Precipitation: 0"
- Wind: 18mphS 189°
- Humidity: 42%
- UV index: 4
- Sunrise: 7:37 am CDT
- Sunset: 6:36 pm CDT
- details ▼
On Sunday, October 18, a sun-drenched sky is anticipated.
Temperature fluctuations will be substantial, ranging from a peak of an agreeable 68°F to a low of a cold 41°F.
This October day will feature warmer weather, consistent with September's average of 75°F.
Sunrise was at 7:37 am and sunset will be at 6:36 pm; the daylight will last for 10h and 59min.
Temperature fluctuations will be substantial, ranging from a peak of an agreeable 68°F to a low of a cold 41°F.
This October day will feature warmer weather, consistent with September's average of 75°F.
Sunrise was at 7:37 am and sunset will be at 6:36 pm; the daylight will last for 10h and 59min.
10-day overview
Daily temperatures
Warmest day: Thursday 79°C.
Coldest period: Sunday - Monday 64°C.
Coldest period: Sunday - Monday 64°C.
Chance of precipitation
Highest chance: 24%.
Long-term weather forecast
- Sunday
- Oct 18, 2026
- 68°F
- 41°F
Sunny
- Precip. probability: 1%
- Precipitation: 0"
- Wind: 18mphS 189°
- Humidity: 42%
- UV index: 4
- Sunrise: 7:37 am CDT
- Sunset: 6:36 pm CDT
- details ▼
- Monday
- Oct 19, 2026
- 68°F
- 43°F
Partly Cloudy
- Precip. probability: 7%
- Precipitation: 0"
- Wind: 11mphS 170°
- Humidity: 64%
- UV index: 4
- Sunrise: 7:39 am CDT
- Sunset: 6:34 pm CDT
- details ▼
- Tuesday
- Oct 20, 2026
- 72°F
- 50°F
Sunny
- Precip. probability: 5%
- Precipitation: 0"
- Wind: 12mphSSE 165°
- Humidity: 58%
- UV index: 4
- Sunrise: 7:40 am CDT
- Sunset: 6:33 pm CDT
- details ▼
- Wednesday
- Oct 21, 2026
- 75°F
- 52°F
Mostly Sunny
- Precip. probability: 15%
- Precipitation: 0"
- Wind: 10mphS 190°
- Humidity: 62%
- UV index: 4
- Sunrise: 7:41 am CDT
- Sunset: 6:31 pm CDT
- details ▼
- Thursday
- Oct 22, 2026
- 79°F
- 57°F
Mostly Sunny
- Precip. probability: 5%
- Precipitation: 0"
- Wind: 9mphSSE 156°
- Humidity: 61%
- UV index: 4
- Sunrise: 7:42 am CDT
- Sunset: 6:30 pm CDT
- details ▼
- Friday
- Oct 23, 2026
- 77°F
- 59°F
Partly Cloudy
- Precip. probability: 11%
- Precipitation: 0"
- Wind: 19mphSSE 159°
- Humidity: 52%
- UV index: 3
- Sunrise: 7:43 am CDT
- Sunset: 6:29 pm CDT
- details ▼
- Saturday
- Oct 24, 2026
- 75°F
- 50°F
Mostly Cloudy
- Precip. probability: 24%
- Precipitation: 0"
- Wind: 15mphSSW 193°
- Humidity: 49%
- UV index: 3
- Sunrise: 7:44 am CDT
- Sunset: 6:27 pm CDT
- details ▼
- Sunday
- Oct 25, 2026
- 64°F
- 50°F
Partly Cloudy
- Precip. probability: 19%
- Precipitation: 0"
- Wind: 8mphNE 55°
- Humidity: 70%
- UV index: 3
- Sunrise: 7:46 am CDT
- Sunset: 6:26 pm CDT
- details ▼
- Monday
- Oct 26, 2026
- 64°F
- 52°F
Mostly Cloudy
- Precip. probability: 24%
- Precipitation: 0"
- Wind: 9mphSE 137°
- Humidity: 76%
- UV index: 3
- Sunrise: 7:47 am CDT
- Sunset: 6:24 pm CDT
- details ▼
- Tuesday
- Oct 27, 2026
- 66°F
- 50°F
Mostly Cloudy
- Precip. probability: 24%
- Precipitation: 0.04"
- Wind: 12mphSSE 159°
- Humidity: 68%
- UV index: 3
- Sunrise: 7:48 am CDT
- Sunset: 6:23 pm CDT
- details ▼
During the upcoming ten-day period, a combination of gloomy and sun-filled weather is forecasted.
With a probability of 24%, rainfall is expected only on next Tuesday. The precipitation will be minimal at 0.04".
The temperature will vary considerably in the upcoming days. Forecast highs will fluctuate between 64.4°F and 78.8°F, while the fluctuation in night temperatures will be also significant, as the minimum temperature is expected to range between 41°F and 59°F.
Expect the warmest day on Thursday, with temperatures peaking at 78.8°F; with a maximum temperature of 64.4°F, next Sunday and Monday will be the coldest days in Portsmouth.
With a probability of 24%, rainfall is expected only on next Tuesday. The precipitation will be minimal at 0.04".
The temperature will vary considerably in the upcoming days. Forecast highs will fluctuate between 64.4°F and 78.8°F, while the fluctuation in night temperatures will be also significant, as the minimum temperature is expected to range between 41°F and 59°F.
Expect the warmest day on Thursday, with temperatures peaking at 78.8°F; with a maximum temperature of 64.4°F, next Sunday and Monday will be the coldest days in Portsmouth.
Updated: Oct 18, 2026 @ 15:59:56 UTC
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate
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.
Today, the highest temperature will be 68°F, while the lowest temperature will be 41°F.
The maximum temperature today will be a couple of degrees higher than the average highest temperature in October. The lowest temperature today will be in line with the average low temperature.
The maximum temperature today will be a couple of degrees higher than the average highest temperature in October. The lowest temperature today will be in line with the average low temperature.
On Sunday, in Portsmouth, sunrise was at 7:37 am and sunset will be at 6:36 pm (CDT).
Today, the daylight will last for 10h and 59min.
