Storm Station
San Tan Valley, Arizona
91°
Mostly clear· Feels like 87°·Light air 4 mph WSW
Partly sunny. High near 97, with temperatures falling to around 95 in the afternoon. South wind 0 to 5 mph.
-UV
-Air quality
21%Humidity
34%Cloud

What is measuring near here

The 4 instruments nearest San Tan Valley, how far away each one is, how high it stands, and what kind of measurement it makes. The nearest is 0.2 miles away.

measured now2 instruments

Williams AFB/ChandlIWA

At an airfield/9.4 mi away/1,385 ft/90 ft below here

temp, wind, gust, visibility, precip, pressure

Rank399of 403

Az Coolidge 5 WCOOA3

At a river or reservoir gauge/14.0 mi away/1,417 ft/58 ft below here

temp, wind, gust, humidity, pressure

Rank291of 403

measured daily2 instruments

Queen Creek 5.3 SEAZ-PN-5

In a volunteer observer's own ground/0.2 mi away/1,476 ft/1 ft above here

precip, snowfall, snow depth

Rank-

Casa Grande Natl MonumtCLGA3

At a cooperative observer's station/13.8 mi away/1,414 ft/61 ft below here

snowfall, snow depth, precip, high, low

Rank-

Station report

The weather at Williams AFB/Chandl, drawn

The nearest airport reporting now, 9.4 mi from San Tan Valley. From its report of Sep 27, 2026, 5:47 AM local time: 3 of its 6 sheets.

The sky

Clear; visibility 10 mi or more.

Section of the sky over Williams AFB/Chandl, height above the station to scale: a clear sky, and visibility of 10 mi or more.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT IWAFIG. A THE SKY OVER WILLIAMS AFB/CHANDLSECTION, HEIGHT ABOVE THE STATION TO SCALE, EACH LAYER AT THE HEIGHT OF ITS BASE AS REPORTED; COVER IN EIGHTHS OF THE SKY; TOPS NOT MEASUREDFT ABOVE THE STATION05001,0001,5002,0002,5003,000ETAGESLOWTHE STATIONCLEARVISIBILITY, MILES: 10 MI OR MORE0510TITLEWilliams AFB/Chandl, the skySTATION REPORT · ASOS IWATYPESECTIONSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 1 of 6DATE2026-09-27IDSR-IWA-1DRAWN AS linework on paperSOURCES FB-SKY-001

The air

75.2 F with a dew point of 51.8 F, 44 per cent relative humidity. Air lifted from the station would cool to its dew point, where cloud forms, about 5,400 ft up.

Chart of the air at Williams AFB/Chandl: temperature 75.2 degrees Fahrenheit and dew point 51.8, 44 per cent relative humidity; air lifted from the station cools along the dry rate and meets its dew point about 5,400 feet above the station; height to scale.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT IWAFIG. B THE AIR AT WILLIAMS AFB/CHANDLTHE REPORTED TEMPERATURE AND DEW POINT, AND AIR LIFTED FROM THE STATION WITHOUT MIXING UNTIL IT SATURATES; HEIGHT ABOVE THE STATION TO SCALEFT ABOVE THE STATION01,0002,0003,0004,0005,0006,0007,00040 F50 F60 F70 F80 F90 FSATURATES 5,400 FT ABOVE THE STATION, AT 46.6 FTEMPERATURE 75.2 FDEW POINT 51.8 FSPREAD 23.4 FRELATIVE HUMIDITY 44 PER CENTTHE AIR COOLS ABOUT 5.4 F EACH 1,000 FT IT RISES, AND ITS DEW POINT ABOUT 1 FSOLID: THE LIFTED AIR'S TEMPERATURE; DASHED: ITS DEW POINTTITLEWilliams AFB/Chandl, the airSTATION REPORT · ASOS IWATYPECHARTSCALEHEIGHT TO SCALEREVAS REPORTED SHEET 2 of 6DATE2026-09-27IDSR-IWA-2DRAWN AS linework on paperSOURCES FB-WAT-002, FB-ENG-011, FB-ENG-005

The wind

From the east (90 degrees) at 6 mph: force 2, a light breeze on the Beaufort scale.

Plan of the wind at Williams AFB/Chandl, north up: blowing from 90 degrees, the east, at 6 miles an hour; beside it the Beaufort scale from calm to hurricane force, force 2, light breeze, marked.1122334455667788AABBCCDDEE© 2026 STORM STATION 247THE FIELD BOOKSTATION REPORT IWAFIG. C THE WIND AT WILLIAMS AFB/CHANDLPLAN, NORTH UP: THE WIND AS REPORTED, AND WHERE IT SITS ON THE BEAUFORT SCALENESWTHE STATIONFROM 90°BEAUFORT FORCELEAST WIND, MPH0CALM01LIGHT AIR12LIGHT BREEZE4NOW, 6 MPH3GENTLE BREEZE84MODERATE BREEZE135FRESH BREEZE196STRONG BREEZE257NEAR GALE328GALE399STRONG GALE4710STORM5511VIOLENT STORM6412HURRICANE FORCE73TITLEWilliams AFB/Chandl, the windSTATION REPORT · ASOS IWATYPEPLAN north upSCALENOT TO SCALEREVAS REPORTED SHEET 3 of 6DATE2026-09-27IDSR-IWA-3DRAWN AS linework on paperSOURCES FB-EVT-150, FB-ENG-008, FB-INS-002

The full report of Williams AFB/Chandl, in 6 sheets, each beside the Field Book plates that explain it

-in

Snow on the ground

Elsewhere in Arizona

16 places, each with its own forecast and its own instruments.

Near San Tan Valley

The nearest places, each with its own forecast and the instruments nearest it.