Weather forecast for 10 daysFountain Hills, AZ

Weather forecast for the weekend

Saturday Oct 17, 2026

  • 77°F
  • 64°F
Cloudy
Cloudy
  • Precip. probability: 24%
  • Precipitation: 0"
  • Wind: 17mphE 84°
  • Humidity: 20%
  • UV index: 4
  • Sunrise: 6:33 am MST
  • Sunset: 5:50 pm MST
  • ▼
Today, gloomy weather with thick clouds is expected.
Temperature fluctuations between a moderately hot 77°F and a breezy 64.4°F are anticipated.
Today's top temperature will be slightly cooler than October's standard maximum of 81.9°F.
Sunrise was at 6:33 am and sunset will be at 5:50 pm; the daylight will last for 11h and 17min.

Sunday Oct 18, 2026

  • 79°F
  • 66°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 24%
  • Precipitation: 0"
  • Wind: 9mphNE 48°
  • Humidity: 41%
  • UV index: 5
  • Sunrise: 6:34 am MST
  • Sunset: 5:49 pm MST
  • ▼
On Sunday, October 18, moderate cloud cover will mix with sunshine throughout the day.
The temperature is predicted to vary between a warm 78.8°F and an enjoyable 66.2°F.
The temperature for tomorrow is anticipated to correspond with the average October peak of 81.9°F.
Sunrise will be at 6:34 am and sunset at 5:49 pm; tomorrow's daylight will last for 11h and 16min.

10-day overview

Daily temperatures

Warmest day: Tuesday 86°C.
Coldest day: Friday 72°C.

Chance of precipitation

Highest chance: Thursday 77%.

Long-term weather forecast

  • Saturday
  • Oct 17, 2026
  • 77°F
  • 64°F
Cloudy
Cloudy
  • Precip. probability: 24%
  • Precipitation: 0"
  • Wind: 17mphE 84°
  • Humidity: 20%
  • UV index: 4
  • Sunrise: 6:33 am MST
  • Sunset: 5:50 pm MST
  • ▼
  • Sunday
  • Oct 18, 2026
  • 79°F
  • 66°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 24%
  • Precipitation: 0"
  • Wind: 9mphNE 48°
  • Humidity: 41%
  • UV index: 5
  • Sunrise: 6:34 am MST
  • Sunset: 5:49 pm MST
  • ▼
  • Monday
  • Oct 19, 2026
  • 84°F
  • 66°F
Mostly Sunny
Mostly Sunny
  • Precip. probability: 15%
  • Precipitation: 0"
  • Wind: 6mphSE 127°
  • Humidity: 46%
  • UV index: 6
  • Sunrise: 6:35 am MST
  • Sunset: 5:48 pm MST
  • ▼
  • Tuesday
  • Oct 20, 2026
  • 86°F
  • 70°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 15%
  • Precipitation: 0.12"
  • Wind: 7mphSE 142°
  • Humidity: 44%
  • UV index: 6
  • Sunrise: 6:35 am MST
  • Sunset: 5:47 pm MST
  • ▼
  • Wednesday
  • Oct 21, 2026
  • 81°F
  • 68°F
Scattered Thunderstorms
Scattered Thunderstorms
  • Precip. probability: 56%
  • Precipitation: 0.71"
  • Wind: 10mphE 97°
  • Humidity: 57%
  • UV index: 5
  • Sunrise: 6:36 am MST
  • Sunset: 5:46 pm MST
  • ▼
  • Thursday
  • Oct 22, 2026
  • 77°F
  • 63°F
Thunderstorms
Thunderstorms
  • Precip. probability: 77%
  • Precipitation: 0.51"
  • Wind: 9mphSSE 161°
  • Humidity: 67%
  • UV index: 5
  • Sunrise: 6:37 am MST
  • Sunset: 5:45 pm MST
  • ▼
  • Friday
  • Oct 23, 2026
  • 72°F
  • 57°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 24%
  • Precipitation: 0"
  • Wind: 6mphSSW 208°
  • Humidity: 59%
  • UV index: 6
  • Sunrise: 6:38 am MST
  • Sunset: 5:43 pm MST
  • ▼
  • Saturday
  • Oct 24, 2026
  • 75°F
  • 57°F
Sunny
Sunny
  • Precip. probability: 4%
  • Precipitation: 0"
  • Wind: 5mphNNE 30°
  • Humidity: 47%
  • UV index: 5
  • Sunrise: 6:39 am MST
  • Sunset: 5:42 pm MST
  • ▼
  • Sunday
  • Oct 25, 2026
  • 75°F
  • 61°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 6mphE 88°
  • Humidity: 44%
  • UV index: 5
  • Sunrise: 6:40 am MST
  • Sunset: 5:41 pm MST
  • ▼
  • Monday
  • Oct 26, 2026
  • 75°F
  • 61°F
Partly Cloudy
Partly Cloudy
  • Precip. probability: 20%
  • Precipitation: 0"
  • Wind: 7mphESE 104°
  • Humidity: 51%
  • UV index: 5
  • Sunrise: 6:40 am MST
  • Sunset: 5:40 pm MST
  • ▼
gloomy, bright and storm-filled weather is forecasted.
Rainfall is forecasted for Tuesday through Thursday.
Significant changes in temperature are expected in the coming days. Highs will range from 71.6°F to 86°F, while the nightly low temperatures will show also a considerable swing, as nighttime lows are forecast to fall between 57.2°F and 69.8°F.
Tuesday will be the hottest day, with a maximum temperature of 86°F; the lowest daytime temperature of the period will be reached on Friday, peaking at 71.6°F.
Updated: Oct 17, 2026 @ 13:56:05 UTC
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate

Frequently asked questions

On Saturday, low-hanging clouds will persist throughout the day.

Today, the highest temperature will be 77°F, while the lowest temperature will be 64.4°F.
Today, the highest temperature will be a couple of degrees lower than the average maximum temperature in October. The lowest temperature will be in line with the average low of 63°F.

On Saturday, in Fountain Hills, sunrise was at 6:33 am and sunset will be at 5:50 pm (MST).

In Fountain Hills, Arizona, the length of the day today will be 11h and 17min.

On Sunday, moderate cloud cover will mix with sunshine throughout the day.

Tomorrow, the highest temperature will be 78.8°F, while the lowest temperature will be 66.2°F.
The highest temperature tomorrow will be in line with the average maximum temperature in October. The lowest temperature tomorrow will be also in line with the average low temperature.

On Sunday, in Fountain Hills, sunrise will be at 6:34 am and sunset at 5:49 pm (MST).

Tomorrow, the daylight will last for 11h and 16min.