Casa Grande weather in August: Casa Grande, Arizona: normal highs, lows, rain and records for August
Casa Grande in August has a normal high of 105°F and a normal low of 77°F, a daily mean of 91°F, falling from 106°F on the 1st to 104°F by the 31st. Measurable precipitation falls on 5 days in a normal August, 1.52 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 41°C and low of 25°C, 39 mm of precipitation in August.
- NOAA stationCasa Grande
- Station IDUSC00021306
- Location32.89°N 111.71°W
- Elevation1,400 ft (427 m)
- From the center3 miles
- Population68,927
- Jan 69° 39°
- Feb 73° 42°
- Mar 80° 47°
- Apr 88° 53°
- May 96° 60°
- Jun 106° 70°
- Jul 107° 78°
- Aug 105° 77°
- Sep 100° 71°
- Oct 91° 57°
- Nov 78° 45°
- Dec 68° 38°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Casa Grande in August?
The normal high is 105°F and the normal low 77°F, for a daily mean of 91.3°F. August is 1.2°F cooler than July and 5.8°F warmer than September. August is the 2nd warmest month of the year in Casa Grande and the wettest. Across the month the normal high falls 2°F, from 106°F on August 1 to 104°F on August 31. From one year to the next August's mean temperature typically moves about 1.8°F either way (NOAA's standard deviation), so roughly two Augusts in three average between 90°F and 93°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 15%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| August 1 | 106°F | 79°F | 13% | 7% |
| August 8 | 106°F | 78°F | 14% | 8% |
| August 15 | 106°F | 78°F | 15% | 9% |
| August 22 | 105°F | 77°F | 14% | 8% |
| August 31 | 104°F | 76°F | 13% | 7% |
Every day of August: normal high, low and chance of precipitation (warmest afternoon August 1, coldest night August 31)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| August 1 | 106°F | 79°F | 13% | 7% | 13 h 50 min |
| August 2 | 106°F | 79°F | 13% | 7% | 13 h 50 min |
| August 3 | 106°F | 79°F | 14% | 8% | 13 h 40 min |
| August 4 | 106°F | 78°F | 14% | 8% | 13 h 40 min |
| August 5 | 106°F | 78°F | 14% | 8% | 13 h 40 min |
| August 6 | 106°F | 78°F | 14% | 8% | 13 h 40 min |
| August 7 | 106°F | 78°F | 14% | 8% | 13 h 40 min |
| August 8 | 106°F | 78°F | 14% | 8% | 13 h 40 min |
| August 9 | 106°F | 78°F | 14% | 8% | 13 h 30 min |
| August 10 | 106°F | 78°F | 15% | 8% | 13 h 30 min |
| August 11 | 106°F | 78°F | 15% | 8% | 13 h 30 min |
| August 12 | 106°F | 78°F | 15% | 8% | 13 h 30 min |
| August 13 | 106°F | 78°F | 15% | 8% | 13 h 30 min |
| August 14 | 106°F | 78°F | 15% | 9% | 13 h 30 min |
| August 15 | 106°F | 78°F | 15% | 9% | 13 h 20 min |
| August 16 | 106°F | 77°F | 15% | 9% | 13 h 20 min |
| August 17 | 105°F | 77°F | 15% | 9% | 13 h 20 min |
| August 18 | 105°F | 77°F | 15% | 9% | 13 h 20 min |
| August 19 | 105°F | 77°F | 15% | 9% | 13 h 20 min |
| August 20 | 105°F | 77°F | 15% | 8% | 13 h 20 min |
| August 21 | 105°F | 77°F | 14% | 8% | 13 h 10 min |
| August 22 | 105°F | 77°F | 14% | 8% | 13 h 10 min |
| August 23 | 105°F | 77°F | 14% | 8% | 13 h 10 min |
| August 24 | 105°F | 77°F | 14% | 8% | 13 h 10 min |
| August 25 | 105°F | 76°F | 14% | 8% | 13 h 10 min |
| August 26 | 105°F | 76°F | 14% | 8% | 13 h |
| August 27 | 105°F | 76°F | 13% | 8% | 13 h |
| August 28 | 105°F | 76°F | 13% | 8% | 13 h |
| August 29 | 104°F | 76°F | 13% | 8% | 13 h |
| August 30 | 104°F | 76°F | 13% | 7% | 13 h |
| August 31 | 104°F | 76°F | 13% | 7% | 12 h 50 min |
- Normal high
- 105°FAugust average
- Normal low
- 77°FAugust average
- Precipitation
- 1.52 inmonth total
- Days with precipitation
- 50.01 inch or more
- Days at 90°F or more
- 31
- Daylight
- 13 h 50 min to 12 h 50 minAugust 1 to August 31
- Days at 70°F or more
- 31
- Days at 80°F or more
- 31
- Sunshine
- 90%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00021306; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Casa Grande in August?
On a given August day the chance of 0.01 inch or more is 14% on average, highest around August 14 (15%). In all, 1.52 in falls on 5 days of a normal August.
In a normal August in Casa Grande, 31 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00021306.
What are the records for August in Casa Grande?
The warmest August temperature on this station's record (since 1903) is 120°F, on August 4, 1907; the coldest is 57°F, on August 24, 1908. The wettest August brought 6.22 in (1971).
The August mean against the 1991-2020 normal of 91.3°F: 2021 89.5°F (−1.8), 2022 89.5°F (−1.8), 2023 94.7°F (+3.4), 2025 94.2°F (+2.9), 2026 95.5°F (+4.3). 3 of 5 ran warmer than normal.
| August | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 89.5°F | −1.8°F | 1.49 in |
| 2022 | 89.5°F | −1.8°F | 2.12 in |
| 2023 | 94.7°F | +3.4°F | 0.32 in |
| 2025 | 94.2°F | +2.9°F | 1.06 in |
| 2026 | 95.5°F | +4.3°F | 1.35 in |
Source: records: ACIS, station USC00021306; recent months: ACIS, station USC00021306. Records and recent months use complete months only.
How does August in Casa Grande compare across Arizona?
Across the 97 places PlainClimate covers in Arizona, August normal highs run from 73°F in Greer to 109°F in Bullhead City; Casa Grande's is 105°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.
Other months and places
- Casa Grande in July107°F by day, 78°F at night
- Casa Grande in September100°F by day, 71°F at night
- Casa Grande through the yearEvery month, frost dates, records and recent years
- Arizona in AugustThe statewide normal and the warmest and coolest places
- Bullhead City: Arizona's warmest Augustnormal high 109°F