Casa Grande Weather in December
Average highs run from 70°F on December 1 to 67°F on December 31, and lows from 40°F to 38°F. Normal precipitation for the month is 0.73 in over about 4 wet days.
December day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
December at a glance
- Average high
- 68°F
- Average low
- 38°F
- Precipitation
- 0.73 in
- Record high
- 91°FDec 6, 1907
- Record low
- 15°FDec 24, 1974
- Chance of a freeze
- 86%
- Daylight
- 10 h 08 min to 10 h 02 min
- Cloud cover
- 42%
- Humidity
- 47%
- Dew point
- 29°F
- Wind
- 6.5 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation.
| Date | Normal high | Normal low | Record high | Record low | Chance wet |
|---|---|---|---|---|---|
| Dec 1 | 70°F | 40°F | 85°F 1953 | 25°F 1906 | 9% |
| Dec 2 | 70°F | 40°F | 87°F 1995 | 21°F 1934 | 9% |
| Dec 3 | 70°F | 40°F | 87°F 1907 | 22°F 1934 | 9% |
| Dec 4 | 69°F | 40°F | 89°F 1907 | 23°F 1948 | 9% |
| Dec 5 | 69°F | 39°F | 90°F 1907 | 23°F 1906 | 9% |
| Dec 6 | 69°F | 39°F | 91°F 1907 | 23°F 2005 | 10% |
| Dec 7 | 69°F | 39°F | 87°F 1907 | 20°F 1960 | 10% |
| Dec 8 | 68°F | 39°F | 86°F 1939 | 25°F 1976 | 10% |
| Dec 9 | 68°F | 39°F | 87°F 1906 | 23°F 1906 | 10% |
| Dec 10 | 68°F | 39°F | 87°F 1907 | 22°F 1906 | 10% |
| Dec 11 | 68°F | 38°F | 87°F 1950 | 19°F 1906 | 10% |
| Dec 12 | 68°F | 38°F | 85°F 1907 | 21°F 1906 | 11% |
| Dec 13 | 67°F | 38°F | 82°F 1950 | 25°F 1906 | 11% |
| Dec 14 | 67°F | 38°F | 81°F 1907 | 22°F 1920 | 11% |
| Dec 15 | 67°F | 38°F | 87°F 1907 | 18°F 1931 | 11% |
| Dec 16 | 67°F | 38°F | 87°F 1907 | 18°F 1931 | 11% |
| Dec 17 | 67°F | 38°F | 90°F 1907 | 22°F 1930 | 11% |
| Dec 18 | 67°F | 38°F | 83°F 2024 | 22°F 1928 | 12% |
| Dec 19 | 67°F | 38°F | 82°F 1950 | 19°F 1928 | 12% |
| Dec 20 | 67°F | 38°F | 80°F 1950 | 19°F 1930 | 12% |
| Dec 21 | 67°F | 38°F | 82°F 2005 | 22°F 1906 | 12% |
| Dec 22 | 67°F | 38°F | 82°F 2005 | 22°F 1929 | 12% |
| Dec 23 | 67°F | 38°F | 85°F 1906 | 23°F 1920 | 12% |
| Dec 24 | 67°F | 38°F | 87°F 1906 | 15°F 1974 | 12% |
| Dec 25 | 67°F | 38°F | 83°F 1907 | 21°F 1976 | 12% |
| Dec 26 | 67°F | 38°F | 83°F 1906 | 21°F 1906 | 12% |
| Dec 27 | 67°F | 38°F | 87°F 1907 | 22°F 1974 | 12% |
| Dec 28 | 67°F | 38°F | 89°F 1907 | 15°F 1954 | 12% |
| Dec 29 | 67°F | 38°F | 85°F 1907 | 18°F 1954 | 12% |
| Dec 30 | 67°F | 38°F | 87°F 1907 | 17°F 1954 | 12% |
| Dec 31 | 67°F | 38°F | 89°F 1907 | 17°F 1906 | 12% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (MST).
- December 1
- sunrise 7:12 AM, sunset 5:20 PM
- December 31
- sunrise 7:29 AM, sunset 5:31 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00021306 (Casa Grande), public domain. Records: NOAA GHCN-Daily, station USC00021306, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-25. Sun and moon: computed with the NOAA solar equations and Meeus.