Fountain of the Sun, AZ Weather Forecast
Local 7-day forecast
Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms
Track current conditions, temperature changes, wind, and the full daily outlook for Fountain of the Sun, AZ in one place.
A chance of showers and thunderstorms before 10am, then a slight chance of showers and thunderstorms. Mostly sunny. High near 99, with temperatures falling to around 97 in the afternoon. East southeast wind around 5 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
Local Weather Overview
This forecast page for Fountain of the Sun, AZ is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Sep 14, 2026 5:21 PM MST.
The active forecast window currently covers Sep 15 to Sep 20, 2026 for Fountain of the Sun, AZ.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Sep 15 to Sep 20, 2026
- Latest sync
- Sep 14, 2026 5:21 PM MST
- Forecast office
- PSR
- Source
- NOAA / NWS
Daily Outlook
This Week in Fountain of the Sun
Saturday looks like the warmest upcoming period in Fountain of the Sun at 103 degrees F.
Wednesday Night is the coolest period ahead with temperatures near 78 degrees F.
The strongest winds are forecast for Tuesday at about 5 mph ESE.
Precipitation is mentioned in 5 upcoming forecast periods.
Forecast Details
- Last updated
- Sep 14, 2026 5:21 PM MST
- Coverage
- 7 days
- Time zone
- America/Phoenix
- Forecast office
- PSR
- Radar station
- KIWA
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
A slight chance of showers and thunderstorms before midnight, then showers and thunderstorms likely. Mostly cloudy, with a low around 79. Southeast wind around 5 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch possible.
Showers and thunderstorms likely before 11am, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 96. Southeast wind around 5 mph. Chance of precipitation is 70%. New rainfall amounts less than a tenth of an inch possible.
A slight chance of showers and thunderstorms before 11pm, then a chance of showers and thunderstorms between 11pm and 5am, then a slight chance of showers and thunderstorms. Mostly cloudy, with a low around 78. East southeast wind around 5 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
A slight chance of showers and thunderstorms before 5pm. Sunny, with a high near 99. Southeast wind around 5 mph. Chance of precipitation is 20%.
Mostly clear, with a low around 79. East southeast wind 0 to 5 mph.
Sunny, with a high near 101. South southeast wind around 5 mph.
Clear, with a low around 80. North wind 0 to 5 mph.
Sunny, with a high near 103. South wind around 5 mph.
Mostly clear, with a low around 79. Northeast wind 0 to 5 mph.
Sunny, with a high near 101. South southeast wind around 5 mph.
Mostly clear, with a low around 78. Southeast wind 0 to 5 mph.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Tuesday
Sep 15
|
Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms
|
99°F |
5 mph
ESE
|
|
Tuesday Night
Sep 15
|
Slight Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
|
79°F |
5 mph
SE
|
|
Wednesday
Sep 16
|
Showers And Thunderstorms Likely then Slight Chance Showers And Thunderstorms
|
96°F |
5 mph
SE
|
|
Wednesday Night
Sep 16
|
Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms
|
78°F |
5 mph
ESE
|
|
Thursday
Sep 17
|
Slight Chance Showers And Thunderstorms
|
99°F |
5 mph
SE
|
|
Thursday Night
Sep 17
|
Mostly Clear
|
79°F |
0 to 5 mph
ESE
|
|
Friday
Sep 18
|
Sunny
|
101°F |
5 mph
SSE
|
|
Friday Night
Sep 18
|
Clear
|
80°F |
0 to 5 mph
N
|
|
Saturday
Sep 19
|
Sunny
|
103°F |
5 mph
S
|
|
Saturday Night
Sep 19
|
Mostly Clear
|
79°F |
0 to 5 mph
NE
|
|
Sunday
Sep 20
|
Sunny
|
101°F |
5 mph
SSE
|
|
Sunday Night
Sep 20
|
Mostly Clear
|
78°F |
0 to 5 mph
SE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Fountain of the Sun.