Observed 7:50 PM MST at KIWA

San Tan Valley, AZ weather

Clear and 72°22°, 10°6° colder than a typical Oct 23.

Mostly agree

Now 72°22°

Clear

Wind: 6 mph9 km/h; From the northwest. Up to 6 mph9 km/h through 9 AM
Dew point: 41°5°; Comfortable · up to 53°12° by 10 PM
UV tomorrow: 6High; High 12–2 PM · peak 6
Air quality: 33Good; Main pollutant: Ozone
Pressure: 29.85 inHg1011 hPa; Rising slowly · +0.02 inHg+0.7 hPa in 3 h

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

Good hours for

Low 56°13° tomorrow at 6 AM
Above 70°21° tomorrow by 10 AM
High 78°26° tomorrow at 3 PM
Below 70°21° tomorrow night after 7 PM

TonightDown to 58°14° by 4 AM · Clear
Tomorrow morningUp to 73°23° by 11 AM · Partly cloudy
Tomorrow afternoonNear 76°24° · Clear
Tomorrow nightDown to 56°13° by 5 AM · Clear
Sunday morningUp to 76°24° by 11 AM · Clear
Sunday afternoonNear 78°26° · Clear
Sunday nightDown to 68°20° by 8 PM · Clear

Hourly forecast, next 48 hours, in the place's local time
Hour	Conditions	Temperature	Feels like	Precipitation	Wind	Humidity	Cloud cover	UV index
Fri 9p	Clear	66°19° (likely 62°17° to 67°19°)	66°19°	0%	0 mph0 km/h, gusts 8 mph13 km/h	61%	4%	0
Fri 10p	Clear	64°18° (likely 60°16° to 66°19°)	64°18°	0%	0 mph0 km/h, gusts 6 mph9 km/h	67%	7%	0
Fri 11p	Clear	63°17° (likely 58°14° to 65°18°)	63°17°	0%	0 mph0 km/h, gusts 4 mph6 km/h	70%	2%	0
Sat 12a	Clear	62°17° (likely 57°14° to 63°17°)	62°17°	0%	0 mph0 km/h, gusts 3 mph5 km/h	70%	6%	0
Sat 1a	Clear	61°16° (likely 56°13° to 63°17°)	61°16°	0%	0 mph0 km/h, gusts 1 mph2 km/h	70%	10%	0
Sat 2a	Clear	61°16° (likely 55°13° to 61°16°)	61°16°	0%	0 mph0 km/h, gusts 3 mph5 km/h	70%	13%	0
Sat 3a	Clear	59°15° (likely 54°12° to 60°16°)	59°15°	0%	0 mph0 km/h, gusts 4 mph6 km/h	75%	14%	0
Sat 4a	Clear	58°14° (likely 53°12° to 59°15°)	58°14°	0%	0 mph0 km/h, gusts 4 mph6 km/h	75%	15%	0
Sat 5a	Clear	58°14° (likely 51°11° to 58°14°)	58°14°	0%	0 mph0 km/h, gusts 5 mph9 km/h	75%	13%	0
Sat 6a	Clear	56°13° (likely 51°11° to 58°14°)	56°13°	0%	5 mph8 km/h from SE, gusts 6 mph10 km/h	80%	12%	0
Sat 7a	Sunny	58°14° (likely 51°11° to 59°15°)	58°14°	0%	5 mph8 km/h from SSE, gusts 6 mph10 km/h	75%	16%	0
Sat 8a	Mostly sunny	61°16° (likely 55°13° to 61°16°)	61°16°	0%	5 mph8 km/h from SE, gusts 6 mph9 km/h	67%	22%	1
Sat 9a	Sunny	66°19° (likely 61°16° to 66°19°)	66°19°	5%	5 mph8 km/h from SSE, gusts 7 mph11 km/h	54%	25%	2
Sat 10a	Mostly sunny	70°21° (likely 67°19° to 70°21°)	70°21°	5%	5 mph8 km/h from S, gusts 7 mph11 km/h	46%	45%	4
Sat 11a	Mostly sunny	73°23° (likely 70°21° to 73°23°)	73°23°	0%	5 mph8 km/h from SSW, gusts 6 mph9 km/h	40%	39%	5
Sat 12p	Mostly sunny	75°24° (likely 73°23° to 77°25°)	75°24°	0%	5 mph8 km/h from SW, gusts 6 mph10 km/h	37%	30%	6
Sat 1p	Sunny	77°25° (likely 75°24° to 78°26°)	77°25°	0%	5 mph8 km/h from WSW, gusts 10 mph16 km/h	35%	18%	6
Sat 2p	Mostly sunny	77°25° (likely 75°24° to 78°26°)	77°25°	0%	5 mph8 km/h from W, gusts 11 mph17 km/h	35%	11%	5
Sat 3p	Sunny	78°26° (likely 75°24° to 78°26°)	78°26°	0%	5 mph8 km/h from W, gusts 12 mph19 km/h	32%	16%	4
Sat 4p	Sunny	77°25° (likely 74°23° to 77°25°)	77°25°	0%	5 mph8 km/h from W, gusts 12 mph20 km/h	32%	11%	3
Sat 5p	Sunny	76°24° (likely 72°22° to 76°24°)	76°24°	0%	5 mph8 km/h from WNW, gusts 10 mph16 km/h	34%	10%	1
Sat 6p	Clear	73°23° (likely 68°20° to 73°23°)	73°23°	0%	5 mph8 km/h from WNW, gusts 8 mph13 km/h	41%	8%	0
Sat 7p	Clear	69°21° (likely 65°18° to 69°21°)	69°21°	0%	5 mph8 km/h from NNW, gusts 7 mph12 km/h	49%	10%	0
Sat 8p	Clear	67°19° (likely 62°17° to 67°19°)	67°19°	0%	5 mph8 km/h from NNW, gusts 5 mph8 km/h	54%	11%	0
Sat 9p	Clear	66°19° (likely 59°15° to 66°19°)	66°19°	0%	5 mph8 km/h from N, gusts 6 mph9 km/h	56%	15%	0
Sat 10p	Clear	64°18° (likely 58°14° to 64°18°)	64°18°	0%	5 mph8 km/h from NE, gusts 3 mph5 km/h	63%	14%	0
Sat 11p	Clear	63°17° (likely 56°13° to 63°17°)	63°17°	0%	0 mph0 km/h, gusts 3 mph5 km/h	62%	14%	0
Sun 12a	Clear	61°16° (likely 55°13° to 62°17°)	61°16°	0%	0 mph0 km/h, gusts 3 mph5 km/h	67%	11%	0
Sun 1a	Clear	60°16° (likely 53°12° to 60°16°)	60°16°	0%	0 mph0 km/h, gusts 4 mph6 km/h	67%	13%	0
Sun 2a	Clear	59°15° (likely 52°11° to 59°15°)	59°15°	0%	0 mph0 km/h, gusts 4 mph6 km/h	69%	12%	0
Sun 3a	Clear	57°14° (likely 51°11° to 58°14°)	57°14°	0%	0 mph0 km/h, gusts 5 mph7 km/h	75%	10%	0
Sun 4a	Clear	57°14° (likely 50°10° to 57°14°)	57°14°	0%	0 mph0 km/h, gusts 5 mph8 km/h	72%	10%	0
Sun 5a	Clear	56°13° (likely 50°10° to 57°14°)	56°13°	0%	5 mph8 km/h from E, gusts 4 mph7 km/h	72%	12%	0
Sun 6a	Clear	55°13° (likely 49°9° to 56°13°)	55°13°	0%	5 mph8 km/h from E, gusts 5 mph7 km/h	74%	10%	0
Sun 7a	Sunny	58°14° (likely 48°9° to 58°14°)	58°14°	0%	5 mph8 km/h from E, gusts 4 mph6 km/h	69%	7%	0
Sun 8a	Sunny	60°16° (likely 53°12° to 60°16°)	60°16°	0%	5 mph8 km/h from E, gusts 3 mph4 km/h	64%	6%	1
Sun 9a	Sunny	65°18° (likely 61°16° to 65°18°)	65°18°	0%	5 mph8 km/h from ENE, gusts 4 mph7 km/h	52%	1%	2
Sun 10a	Sunny	71°22° (likely 68°20° to 71°22°)	71°22°	0%	5 mph8 km/h from N, gusts 5 mph8 km/h	41%	0%	3
Sun 11a	Sunny	76°24° (likely 72°22° to 76°24°)	76°24°	0%	0 mph0 km/h, gusts 4 mph6 km/h	33%	0%	5
Sun 12p	Sunny	77°25° (likely 75°24° to 78°26°)	77°25°	0%	0 mph0 km/h, gusts 6 mph9 km/h	31%	0%	6
Sun 1p	Sunny	79°26° (likely 77°25° to 79°26°)	79°26°	0%	5 mph8 km/h from NNW, gusts 7 mph11 km/h	30%	0%	6
Sun 2p	Sunny	80°27° (likely 78°26° to 80°27°)	79°26°	0%	5 mph8 km/h from NNW, gusts 7 mph11 km/h	28%	0%	5
Sun 3p	Sunny	79°26° (likely 78°26° to 80°27°)	79°26°	0%	5 mph8 km/h from NNW, gusts 6 mph10 km/h	28%	0%	4
Sun 4p	Sunny	79°26° (likely 77°25° to 79°26°)	79°26°	0%	5 mph8 km/h from NNW, gusts 7 mph12 km/h	28%	0%	2
Sun 5p	Sunny	78°26° (likely 75°24° to 78°26°)	78°26°	0%	5 mph8 km/h from NNW, gusts 8 mph13 km/h	29%	0%	1
Sun 6p	Clear	75°24° (likely 69°21° to 75°24°)	75°24°	0%	5 mph8 km/h from NNW, gusts 7 mph11 km/h	34%	0%	0
Sun 7p	Clear	71°22° (likely 64°18° to 72°22°)	71°22°	0%	5 mph8 km/h from N, gusts 5 mph8 km/h	40%	0%	0
Sun 8p	Clear	68°20° (likely 60°16° to 71°22°)	68°20°	0%	5 mph8 km/h from N, gusts 4 mph6 km/h	47%	0%	0

Days ahead

Shaded: typical range for these dates (1991–2020)

Today, Oct 23. Mostly sunny. High 78°26°, low 56°13°. Typical 88°31° / 53°12°. Dry. Mostly agree.
1. Evening
  6 PM–midnight
  Clear, 63°17°
  Dry
2. Overnight
  midnight–6 AM
  Clear, 58°14°
  Dry
Official NWS forecast
Tonight: Mostly clear. Low around 56, with temperatures rising to around 58 overnight. Southwest wind around 0 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
77°25°–80°27°
Low, likely
55°13°–59°15°
Typical high / low
88°31° / 53°12°
Wind
9 mph14 km/h, gusts 14 mph23 km/h
UV peak
6
Tomorrow, Oct 24. Mostly sunny. High 78°26°, low 55°13°. Typical 88°31° / 53°12°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 61°16°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 78°26°
  Dry
3. Evening
  6 PM–midnight
  Clear, 67°19°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 56°13°
  Dry
Official NWS forecast
Day: Sunny. High near 78, with temperatures falling to around 76 in the afternoon. South southwest wind around 5 mph.
Night: Mostly clear, with a low around 55. East northeast wind 0 to 5 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
75°24°–78°26°
Low, likely
51°11°–58°14°
Typical high / low
88°31° / 53°12°
Wind
10 mph16 km/h
UV peak
6
Sunday, Oct 25. Sunny. High 80°27°, low 55°13°. Typical 87°31° / 52°11°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 60°16°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 80°27°
  Dry
3. Evening
  6 PM–midnight
  Clear, 68°20°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 53°12°
  Dry
Official NWS forecast
Day: Sunny, with a high near 80. North northeast wind 0 to 5 mph.
Night: Mostly clear, with a low around 55. Northeast wind around 5 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
78°26°–80°27°
Low, likely
48°9°–56°13°
Typical high / low
87°31° / 52°11°
Wind
6 mph10 km/h
UV peak
6
Monday, Oct 26. Mostly sunny. High 83°28°, low 59°15°. Typical 87°31° / 52°11°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 57°14°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 82°28°
  Dry
3. Evening
  6 PM–midnight
  Clear, 67°20°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 56°13°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 83. North northeast wind 0 to 5 mph.
Night: Clear, with a low around 59. Northeast wind 0 to 5 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
80°27°–83°28°
Low, likely
46°8°–60°16°
Typical high / low
87°31° / 52°11°
Wind
6 mph10 km/h
UV peak
6
Tuesday, Oct 27. Sunny. High 86°30°, low 61°16°. Typical 86°30° / 51°11°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 59°15°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 83°28°
  Dry
3. Evening
  6 PM–midnight
  Clear, 68°20°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 56°13°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 86. South southeast wind 0 to 5 mph.
Night: Partly cloudy, with a low around 61. Northeast wind 0 to 5 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
81°27°–86°30°
Low, likely
48°9°–63°17°
Typical high / low
86°30° / 51°11°
Wind
8 mph14 km/h, gusts 21 mph34 km/h
UV peak
6
Wednesday, Oct 28. Partly sunny. High 85°29°, low 62°17°. Typical 86°30° / 51°11°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 59°15°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 84°29°
  Dry
3. Evening
  6 PM–midnight
  Partly cloudy, 70°21°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 58°15°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 85. South southeast wind 0 to 5 mph.
Night: Mostly cloudy, with a low around 62. Northeast wind 0 to 5 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
82°28°–87°31°
Low, likely
48°9°–63°17°
Typical high / low
86°30° / 51°11°
Wind
8 mph13 km/h, gusts 15 mph24 km/h
UV peak
4
Thursday, Oct 29. Mostly cloudy. High 83°28°, low 62°17°. Typical 86°30° / 51°11°. Rain 0.07 in1.8 mm, 20% chance. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 61°16°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 84°29°
  Dry
3. Evening
  6 PM–midnight
  Drizzle, 72°22°
  20% chance
4. Overnight
  midnight–6 AM
  Drizzle, 64°18°
  30% chance · 0.12 in3 mm
Hours this far out come from computer models only.
Official NWS forecast
Day: A slight chance of rain showers after 5pm. Partly sunny, with a high near 83. South southeast wind 0 to 5 mph. Chance of precipitation is 20%.
Night: A chance of rain showers. Mostly cloudy, with a low around 62. East wind 0 to 5 mph. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch possible.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
81°27°–85°29°
Low, likely
51°11°–65°18°
Typical high / low
86°30° / 51°11°
Wind
7 mph12 km/h, gusts 18 mph28 km/h
UV peak
4
Friday, Oct 30. Showers. High 78°26°, low 62°17°. Typical 85°29° / 50°10°. Rain 0.29 in7.4 mm, 40% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Drizzle, 66°19°
  30% chance · 0.02 in0.4 mm
2. Afternoon
  noon–6 PM
  Drizzle, 75°24°
  30% chance · 0.05 in1.3 mm
3. Evening
  6 PM–midnight
  Clear, 66°19°
  30% chance · 0.03 in0.7 mm
4. Overnight
  midnight–6 AM
  Partly cloudy, 61°16°
  30% chance · 0.06 in1.4 mm
Hours this far out come from computer models only.
Official NWS forecast
Day: A chance of rain showers. Partly sunny, with a high near 78. South wind around 5 mph. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch possible.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
70°21°–79°26°
Low, likely
60°16°–65°18°
Typical high / low
85°29° / 50°10°
Wind
14 mph22 km/h, gusts 31 mph49 km/h
UV peak
5
Saturday, Oct 31. Cloudy. High 71°22°, low 60°16°. Typical 85°29° / 50°10°. Rain 0.35 in8.9 mm, 40% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 62°17°
  30% chance · 0.1 in2.6 mm
2. Afternoon
  noon–6 PM
  Cloudy, 72°22°
  30% chance · 0.15 in3.8 mm
3. Evening
  6 PM–midnight
  Clear, 66°19°
  30% chance
4. Overnight
  midnight–6 AM
  Clear, 61°16°
  40% chance · 0.02 in0.5 mm
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
69°21°–76°24°
Low, likely
53°12°–64°18°
Typical high / low
85°29° / 50°10°
Wind
13 mph21 km/h, gusts 28 mph46 km/h
UV peak
3
Sunday, Nov 1. Cloudy. High 74°23°, low 59°15°. Typical 84°29° / 49°9°. Rain 0.11 in2.8 mm, 40% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 64°18°
  40% chance
2. Afternoon
  noon–6 PM
  Mostly sunny, 76°24°
  40% chance
3. Evening
  6 PM–midnight
  Cloudy, 68°20°
  40% chance
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
69°21°–79°26°
Low, likely
54°12°–63°17°
Typical high / low
84°29° / 49°9°
Wind
12 mph19 km/h, gusts 17 mph28 km/h
UV peak
5

10 days15 days30 days

The outlook

Today
Dry, high 78°, low 56°.
Tomorrow
Dry, high 78°, low 55°.
Sunday
Dry, high 80°, low 55°.
Rest of week
Mostly dry, highs 71–86°.

Want the meteorologists’ reasoning? Read the NWS forecast discussion (PSR) (opens in a new tab)

What changed since yesterday

No meaningful changes from yesterday’s forecast.

Radar

Radar data: NOAA MRMS, rendered by forecast.blue

Radar loads when scrolled into view

Full-screen radar

Rivers

NOAA river gauges within 25 mi

Weekes Wash at Apache Junction

19 mi

Below flood stage

Level: 0.2 ft

Reading from Fri 7:29 PM · NWS gauge page

For your home

What this week’s weather means for heating, cooling, pipes and fresh air.

Cooling this week

About 70% less cooling than a typical week.

This week 9Typical 31

Cooling degree days, base 65°F

Comfort

Dry air outside (dew point 41°F).

Open the windows?

Today, 10:00 PM–2:00 AM

Good stretch to open the windows (air quality forecast not available for part of this window).

Is this typical?

CASA GRANDE NATL MONUMENT · official normals 1991–2020 · records 1908–2026

Oct 23, today vs a typical year

Today’s expected high is 10°6° colder than typical.

Last 7 days vs normal

—SatOct 17
—SunOct 18
—MonOct 19
—TueOct 20
—WedOct 21
—ThuOct 22
—FriOct 23

San Tan Valley weather by month: normals, records, snow and freeze dates

Sun & moon

Sun

Daylight: 11 h 6 min; Losing 1 min 57 s a day; shortest Dec 21, 1 h 9 min less
Golden hour: 5:09–5:59 PM; Morning 6:21–7:11 AM
Blue hour: 5:59–6:08 PM; Morning 6:11–6:21 AM; first light 6:11 AM

Stars tonight? Good

Clear 9:11 PM–6:12 AM; moon 96% lit, sets 4:59 AM.

Moon

Waxing gibbous

95% lit · growing

Today: sets 3:56 AM · rises 4:10 PM
Full moon: Oct 25
New moon: Nov 9

Looking northeast from San Tan Valley. The highest point on the skyline is about 7,800 ft, 43 mi away.Skyline from USGS elevation data, heights drawn up to 6× taller. Sky, sun and moon as they are now.