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: 46%
- UV index: 4
- Sunrise: 7:37 am CDT
- Sunset: 6:36 pm CDT
- details ▼
Today, on Sunday, October 18, a sun-drenched sky is anticipated.
A wide temperature range is forecasted, from a high of a delightful 68°F to a low of an icy 41°F.
Today, the expected temperature appears higher and closer to September's norm 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.
A wide temperature range is forecasted, from a high of a delightful 68°F to a low of an icy 41°F.
Today, the expected temperature appears higher and closer to September's norm 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: 46%
- 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: 8%
- Precipitation: 0"
- Wind: 10mphS 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 163°
- 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 157°
- 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 ▼
Across the following ten days, a combination of cloud-filled and dry and sunny weather is anticipated.
With a probability of 24%, rainfall is anticipated only on next Tuesday. The precipitation will be minimal at 0.04".
Substantial differences in temperature are forecasted in the upcoming period. The temperature is expected to swing from 64.4°F up to 78.8°F, while the lowest nightly temperature differences will be also quite pronounced, as the lowest temperatures will be recorded between 41°F and 59°F.
The warmest day will be Thursday, with a maximum of 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 anticipated only on next Tuesday. The precipitation will be minimal at 0.04".
Substantial differences in temperature are forecasted in the upcoming period. The temperature is expected to swing from 64.4°F up to 78.8°F, while the lowest nightly temperature differences will be also quite pronounced, as the lowest temperatures will be recorded between 41°F and 59°F.
The warmest day will be Thursday, with a maximum of 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 @ 14:58:31 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
Today, in Portsmouth, skies are expected to be clear and full of sunshine.
Today, the maximum temperature will be 68°F, while the minimum temperature will be 41°F.
Today, the highest temperature will be relatively higher than the average maximum temperature in October. Today, the lowest temperature will be in line with the average low temperature.
Today, the highest temperature will be relatively higher than the average maximum temperature in October. Today, the lowest temperature 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).
In Portsmouth, the length of the day today will be 10h and 59min.
