Casa Grande Nm Weather Records (USC00021314)
Record envelope, standing records and threshold days for Casa Grande Nm (USC00021314), Arizona, United States, with 121 years of record.
Key Facts for Casa Grande Nm
- Casa Grande Nm (USC00021314) is a weather station in Arizona, United States at 32.99 latitude and -111.54 longitude, 433 m (1,419 ft) above sea level.
- The station reports from 1906 to 2026, 121 years of record.
- 1,464 records set at Casa Grande Nm still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Casa Grande Nm set a daily record low maximum temperature of 29.4 C (84.9 F) on 17 September 2026 (provisional).
Provisional Records
Records set in the last 60 days are provisional until they clear the revision window.
About the Station
- Location: Arizona, United States, 32.99 latitude, -111.54 longitude.
- Elevation: 433 m (1,419 ft).
- Period of record: 1906 to 2026, 121 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
20 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 31.7 C (89.1 F) | -13.3 C (8.1 F) | 25.0 C (77.0 F) | -0.6 C (30.9 F) |
| Feb | 33.9 C (93.0 F) | -11.7 C (10.9 F) | 33.3 C (91.9 F) | 0.0 C (32.0 F) |
| Mar | 41.1 C (106.0 F) | -6.1 C (21.0 F) | 41.1 C (106.0 F) | 5.0 C (41.0 F) |
| Apr | 41.1 C (106.0 F) | -3.9 C (25.0 F) | 35.6 C (96.1 F) | 8.3 C (46.9 F) |
| May | 46.7 C (116.1 F) | 0.0 C (32.0 F) | 42.2 C (108.0 F) | 10.0 C (50.0 F) |
| Jun | 50.6 C (123.1 F) | 6.7 C (44.1 F) | 43.9 C (111.0 F) | 16.7 C (62.1 F) |
| Jul | 50.6 C (123.1 F) | 10.6 C (51.1 F) | 47.2 C (117.0 F) | 16.1 C (61.0 F) |
| Aug | 48.9 C (120.0 F) | 12.8 C (55.0 F) | 47.2 C (117.0 F) | 22.8 C (73.0 F) |
| Sep | 47.2 C (117.0 F) | 2.8 C (37.0 F) | 40.6 C (105.1 F) | 18.9 C (66.0 F) |
| Oct | 43.9 C (111.0 F) | -3.9 C (25.0 F) | n/a | n/a |
| Nov | 36.1 C (97.0 F) | -8.3 C (17.1 F) | n/a | n/a |
| Dec | 31.7 C (89.1 F) | -10.0 C (14.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1908 | 5 |
| 1909 | 21 |
| 1910 | 22 |
| 1911 | 27 |
| 1912 | 25 |
| 1913 | 25 |
| 1914 | 10 |
| 1915 | 19 |
| 1916 | 15 |
| 1931 | 7 |
| 1932 | 10 |
| 1933 | 19 |
| 1934 | 18 |
| 1935 | 15 |
| 1936 | 17 |
| 1937 | 21 |
| 1938 | 16 |
| 1939 | 15 |
| 1940 | 16 |
| 1941 | 8 |
| 1942 | 13 |
| 1943 | 12 |
| 1944 | 12 |
| 1945 | 6 |
| 1946 | 13 |
| 1947 | 16 |
| 1948 | 16 |
| 1949 | 31 |
| 1950 | 26 |
| 1951 | 12 |
| 1952 | 8 |
| 1953 | 16 |
| 1954 | 16 |
| 1955 | 25 |
| 1956 | 28 |
| 1957 | 12 |
| 1958 | 17 |
| 1959 | 12 |
| 1960 | 8 |
| 1961 | 6 |
| 1962 | 17 |
| 1963 | 11 |
| 1964 | 13 |
| 1965 | 24 |
| 1966 | 11 |
| 1967 | 9 |
| 1968 | 9 |
| 1969 | 10 |
| 1970 | 17 |
| 1971 | 19 |
| 1972 | 11 |
| 1973 | 13 |
| 1974 | 9 |
| 1975 | 21 |
| 1976 | 10 |
| 1977 | 11 |
| 1978 | 11 |
| 1979 | 13 |
| 1980 | 19 |
| 1981 | 11 |
| 1982 | 10 |
| 1983 | 11 |
| 1984 | 5 |
| 1985 | 12 |
| 1986 | 13 |
| 1987 | 18 |
| 1988 | 10 |
| 1989 | 15 |
| 1990 | 18 |
| 1991 | 14 |
| 1992 | 6 |
| 1993 | 13 |
| 1994 | 17 |
| 1995 | 27 |
| 1996 | 22 |
| 1997 | 5 |
| 1998 | 16 |
| 1999 | 13 |
| 2000 | 11 |
| 2001 | 14 |
| 2002 | 6 |
| 2003 | 21 |
| 2004 | 10 |
| 2005 | 7 |
| 2006 | 16 |
| 2007 | 8 |
| 2008 | 14 |
| 2009 | 14 |
| 2010 | 15 |
| 2011 | 12 |
| 2012 | 7 |
| 2013 | 13 |
| 2014 | 4 |
| 2015 | 13 |
| 2016 | 11 |
| 2017 | 14 |
| 2018 | 9 |
| 2019 | 5 |
| 2020 | 3 |
| 2021 | 6 |
| 2022 | 8 |
| 2023 | 9 |
| 2024 | 14 |
| 2025 | 16 |
| 2026 | 34 |
All-Time Record Progression
4 new records| Date | Kind | Detail |
|---|---|---|
| 1958-07-11 | Record high maximum temperature | Record high maximum temperature 48.9 C (120.0 F) |
| 1993-06-27 | Record high maximum temperature | Record high maximum temperature 49.4 C (120.9 F) |
| 1994-06-26 | Record high maximum temperature | Record high maximum temperature 50.0 C (122.0 F) |
| 1994-06-30 | Record high maximum temperature | Record high maximum temperature 50.6 C (123.1 F) |
Wettest Day of Each Month
Aug: 137.2 mm (5.4 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 53.8 mm (2.1 in) | 5 January 1995 |
| Feb | 44.5 mm (1.8 in) | 3 February 1915 |
| Mar | 53.8 mm (2.1 in) | 12 March 2006 |
| Apr | 25.9 mm (1.0 in) | 12 April 1941 |
| May | 22.4 mm (0.9 in) | 10 May 1944 |
| Jun | 18.5 mm (0.7 in) | 28 June 1938 |
| Jul | 50.8 mm (2.0 in) | 26 July 1936 |
| Aug | 137.2 mm (5.4 in) | 1 August 1906 |
| Sep | 74.2 mm (2.9 in) | 18 September 1946 |
| Oct | 81.3 mm (3.2 in) | 19 October 1972 |
| Nov | 44.7 mm (1.8 in) | 15 November 1993 |
| Dec | 49.5 mm (1.9 in) | 18 December 1978 |
Period of Record Coverage
1908 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1908 | 92 | 25% | No |
| 1909 | 364 | 100% | Yes |
| 1910 | 365 | 100% | Yes |
| 1911 | 364 | 100% | Yes |
| 1912 | 364 | 99% | Yes |
| 1913 | 364 | 100% | Yes |
| 1914 | 358 | 98% | Yes |
| 1915 | 329 | 90% | Yes |
| 1916 | 213 | 58% | No |
| 1931 | 84 | 23% | No |
| 1932 | 284 | 78% | No |
| 1933 | 363 | 99% | Yes |
| 1934 | 352 | 96% | Yes |
| 1935 | 329 | 90% | Yes |
| 1936 | 355 | 97% | Yes |
| 1937 | 361 | 99% | Yes |
| 1938 | 364 | 100% | Yes |
| 1939 | 365 | 100% | Yes |
| 1940 | 366 | 100% | Yes |
| 1941 | 362 | 99% | Yes |
| 1942 | 349 | 96% | Yes |
| 1943 | 363 | 99% | Yes |
| 1944 | 365 | 100% | Yes |
| 1945 | 359 | 98% | Yes |
| 1946 | 361 | 99% | Yes |
| 1947 | 358 | 98% | Yes |
| 1948 | 353 | 96% | Yes |
| 1949 | 364 | 100% | Yes |
| 1950 | 365 | 100% | Yes |
| 1951 | 364 | 100% | Yes |
| 1952 | 366 | 100% | Yes |
| 1953 | 359 | 98% | Yes |
| 1954 | 365 | 100% | Yes |
| 1955 | 365 | 100% | Yes |
| 1956 | 365 | 100% | Yes |
| 1957 | 365 | 100% | Yes |
| 1958 | 363 | 99% | Yes |
| 1959 | 357 | 98% | Yes |
| 1960 | 366 | 100% | Yes |
| 1961 | 360 | 99% | Yes |
| 1962 | 364 | 100% | Yes |
| 1963 | 364 | 100% | Yes |
| 1964 | 366 | 100% | Yes |
| 1965 | 363 | 99% | Yes |
| 1966 | 364 | 100% | Yes |
| 1967 | 365 | 100% | Yes |
| 1968 | 364 | 99% | Yes |
| 1969 | 365 | 100% | Yes |
| 1970 | 365 | 100% | Yes |
| 1971 | 365 | 100% | Yes |
| 1972 | 366 | 100% | Yes |
| 1973 | 365 | 100% | Yes |
| 1974 | 365 | 100% | Yes |
| 1975 | 365 | 100% | Yes |
| 1976 | 366 | 100% | Yes |
| 1977 | 365 | 100% | Yes |
| 1978 | 365 | 100% | Yes |
| 1979 | 365 | 100% | Yes |
| 1980 | 366 | 100% | Yes |
| 1981 | 365 | 100% | Yes |
| 1982 | 362 | 99% | Yes |
| 1983 | 363 | 99% | Yes |
| 1984 | 366 | 100% | Yes |
| 1985 | 364 | 100% | Yes |
| 1986 | 364 | 100% | Yes |
| 1987 | 332 | 91% | Yes |
| 1988 | 338 | 92% | Yes |
| 1989 | 334 | 92% | Yes |
| 1990 | 364 | 100% | Yes |
| 1991 | 365 | 100% | Yes |
| 1992 | 357 | 98% | Yes |
| 1993 | 359 | 98% | Yes |
| 1994 | 365 | 100% | Yes |
| 1995 | 345 | 95% | Yes |
| 1996 | 360 | 98% | Yes |
| 1997 | 365 | 100% | Yes |
| 1998 | 365 | 100% | Yes |
| 1999 | 363 | 99% | Yes |
| 2000 | 365 | 100% | Yes |
| 2001 | 364 | 100% | Yes |
| 2002 | 364 | 100% | Yes |
| 2003 | 365 | 100% | Yes |
| 2004 | 366 | 100% | Yes |
| 2005 | 364 | 100% | Yes |
| 2006 | 364 | 100% | Yes |
| 2007 | 358 | 98% | Yes |
| 2008 | 359 | 98% | Yes |
| 2009 | 342 | 94% | Yes |
| 2010 | 341 | 93% | Yes |
| 2011 | 289 | 79% | No |
| 2012 | 337 | 92% | Yes |
| 2013 | 344 | 94% | Yes |
| 2014 | 224 | 61% | No |
| 2015 | 355 | 97% | Yes |
| 2016 | 355 | 97% | Yes |
| 2017 | 328 | 90% | No |
| 2018 | 348 | 95% | Yes |
| 2019 | 94 | 26% | No |
| 2020 | 89 | 24% | No |
| 2021 | 253 | 69% | No |
| 2022 | 337 | 92% | Yes |
| 2023 | 354 | 97% | Yes |
| 2024 | 364 | 99% | Yes |
| 2025 | 305 | 84% | No |
| 2026 | 247 | 68% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 17 September 2026 | Casa Grande Nm, US | daily low max (Provisional) | 29.4 C (84.9 F) | 1.2 C (2.2 F) | 12 years | 16 of 100 (Routine) |
| 12 September 2026 | Casa Grande Nm, US | daily high min (Provisional) | 27.8 C (82.0 F) | 0.6 C (1.1 F) | 112 years | 41 of 100 (Notable) |
| 28 August 2026 | Casa Grande Nm, US | daily high min (Provisional) | 28.9 C (84.0 F) | 1.1 C (2.0 F) | 3 years | 14 of 100 (Routine) |
| 28 August 2026 | Casa Grande Nm, US | daily high max (Tie, Provisional) | 44.4 C (111.9 F) | tie | 28 years | 4 of 100 (Routine) |
| 27 August 2026 | Casa Grande Nm, US | daily high max (Tie, Provisional) | 46.1 C (115.0 F) | tie | 44 years | 5 of 100 (Routine) |
| 26 August 2026 | Casa Grande Nm, US | daily high max (Tie, Provisional) | 45.0 C (113.0 F) | tie | 15 years | 3 of 100 (Routine) |
| 22 August 2026 | Casa Grande Nm, US | daily high max (Tie, Provisional) | 44.4 C (111.9 F) | tie | 81 years | 8 of 100 (Routine) |
| 18 August 2026 | Casa Grande Nm, US | daily high max (Provisional) | 45.0 C (113.0 F) | 0.6 C (1.1 F) | 111 years | 42 of 100 (Notable) |
| 9 August 2026 | Casa Grande Nm, US | daily high min (Tie) | 30.0 C (86.0 F) | tie | 0 years | 2 of 100 (Routine) |
| 8 August 2026 | Casa Grande Nm, US | daily high min | 30.6 C (87.1 F) | 1.2 C (2.2 F) | 45 years | 27 of 100 (Routine) |
| 5 August 2026 | Casa Grande Nm, US | daily high min | 29.4 C (84.9 F) | 1.1 C (2.0 F) | 4 years | 15 of 100 (Routine) |
| 3 August 2026 | Casa Grande Nm, US | monthly high min | 31.7 C (89.1 F) | 1.1 C (2.0 F) | 115 years | 54 of 100 (Notable) |
| 2 August 2026 | Casa Grande Nm, US | daily high min (Tie) | 29.4 C (84.9 F) | tie | 92 years | 9 of 100 (Routine) |
| 1 August 2026 | Casa Grande Nm, US | daily high min (Tie) | 29.4 C (84.9 F) | tie | 12 years | 3 of 100 (Routine) |
| 31 July 2026 | Casa Grande Nm, US | daily high min | 29.4 C (84.9 F) | 1.1 C (2.0 F) | 80 years | 37 of 100 (Notable) |
| 30 July 2026 | Casa Grande Nm, US | daily high min | 29.4 C (84.9 F) | 1.1 C (2.0 F) | 1 year | 13 of 100 (Routine) |
| 27 July 2026 | Casa Grande Nm, US | daily high min | 30.0 C (86.0 F) | 0.6 C (1.1 F) | 92 years | 38 of 100 (Notable) |
| 26 July 2026 | Casa Grande Nm, US | daily high max (Tie) | 47.2 C (117.0 F) | tie | 31 years | 4 of 100 (Routine) |
| 25 July 2026 | Casa Grande Nm, US | daily high min | 31.1 C (88.0 F) | 1.1 C (2.0 F) | 39 years | 24 of 100 (Routine) |
| 24 July 2026 | Casa Grande Nm, US | daily high min | 30.6 C (87.1 F) | 1.2 C (2.2 F) | 23 years | 19 of 100 (Routine) |
Climate Trend
87 complete years, 1909 to 2024| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1909 | 20.3 C | -0.70 C |
| 1910 | 21.6 C | +0.60 C |
| 1911 | 20.2 C | -0.71 C |
| 1912 | 19.3 C | -1.66 C |
| 1913 | 19.6 C | -1.34 C |
| 1914 | 21.0 C | +0.09 C |
| 1933 | 20.0 C | -0.98 C |
| 1934 | 21.1 C | +0.10 C |
| 1935 | 19.2 C | -1.71 C |
| 1936 | 20.9 C | -0.01 C |
| 1937 | 20.2 C | -0.71 C |
| 1938 | 20.6 C | -0.38 C |
| 1939 | 21.2 C | +0.21 C |
| 1940 | 22.0 C | +1.06 C |
| 1941 | 20.0 C | -0.94 C |
| 1942 | 20.4 C | -0.60 C |
| 1943 | 21.4 C | +0.43 C |
| 1944 | 19.8 C | -1.11 C |
| 1945 | 20.0 C | -0.96 C |
| 1946 | 20.3 C | -0.63 C |
| 1947 | 20.7 C | -0.30 C |
| 1948 | 19.9 C | -1.01 C |
| 1949 | 19.7 C | -1.22 C |
| 1950 | 20.8 C | -0.18 C |
| 1951 | 20.9 C | -0.05 C |
| 1952 | 20.6 C | -0.32 C |
| 1953 | 20.3 C | -0.64 C |
| 1954 | 21.6 C | +0.67 C |
| 1955 | 20.0 C | -0.91 C |
| 1956 | 20.8 C | -0.12 C |
| 1957 | 21.1 C | +0.11 C |
| 1958 | 21.2 C | +0.28 C |
| 1959 | 21.4 C | +0.44 C |
| 1960 | 20.6 C | -0.34 C |
| 1961 | 20.9 C | -0.06 C |
| 1962 | 21.2 C | +0.27 C |
| 1963 | 21.1 C | +0.19 C |
| 1964 | 19.9 C | -1.10 C |
| 1965 | 20.3 C | -0.64 C |
| 1966 | 20.7 C | -0.25 C |
| 1967 | 20.7 C | -0.28 C |
| 1968 | 20.2 C | -0.74 C |
| 1969 | 20.9 C | -0.10 C |
| 1970 | 20.8 C | -0.20 C |
| 1971 | 20.0 C | -0.94 C |
| 1972 | 20.6 C | -0.39 C |
| 1973 | 20.1 C | -0.87 C |
| 1974 | 20.6 C | -0.33 C |
| 1975 | 19.8 C | -1.11 C |
| 1976 | 20.6 C | -0.32 C |
| 1977 | 21.6 C | +0.61 C |
| 1978 | 21.2 C | +0.23 C |
| 1979 | 20.5 C | -0.42 C |
| 1980 | 21.7 C | +0.77 C |
| 1981 | 22.3 C | +1.35 C |
| 1982 | 20.8 C | -0.13 C |
| 1983 | 21.0 C | +0.00 C |
| 1984 | 20.9 C | -0.01 C |
| 1985 | 21.1 C | +0.15 C |
| 1986 | 21.8 C | +0.84 C |
| 1987 | 21.5 C | +0.57 C |
| 1988 | 21.7 C | +0.77 C |
| 1990 | 21.0 C | +0.00 C |
| 1991 | 20.5 C | -0.47 C |
| 1993 | 21.0 C | +0.09 C |
| 1994 | 21.4 C | +0.46 C |
| 1996 | 21.9 C | +0.96 C |
| 1997 | 21.5 C | +0.58 C |
| 1998 | 20.5 C | -0.50 C |
| 1999 | 21.3 C | +0.36 C |
| 2000 | 21.6 C | +0.66 C |
| 2001 | 21.7 C | +0.74 C |
| 2002 | 21.7 C | +0.78 C |
| 2003 | 22.1 C | +1.11 C |
| 2004 | 21.5 C | +0.59 C |
| 2005 | 21.6 C | +0.68 C |
| 2006 | 21.7 C | +0.71 C |
| 2007 | 22.0 C | +1.06 C |
| 2008 | 21.5 C | +0.53 C |
| 2009 | 22.0 C | +1.09 C |
| 2010 | 21.6 C | +0.64 C |
| 2015 | 21.9 C | +0.96 C |
| 2016 | 22.3 C | +1.33 C |
| 2018 | 22.1 C | +1.19 C |
| 2022 | 21.4 C | +0.48 C |
| 2023 | 21.3 C | +0.32 C |
| 2024 | 21.9 C | +0.92 C |
The annual mean temperature here has risen by 0.2 C (0.1 to 0.2) per decade over 1909 to 2024. In Fahrenheit: 0.3 F (0.2 to 0.4) per decade. The slope is a straight line fitted to 87 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | 0.2 C (0.1 to 0.2) per decade | 0.3 F (0.2 to 0.4) per decade | 1909 to 2024 | 87 | Rise |
| Mean daily maximum | 0.09 C (0.03 to 0.14) per decade | 0.2 F (0.1 to 0.3) per decade | 1909 to 2024 | 87 | Rise |
| Mean daily minimum | 0.2 C (0.2 to 0.3) per decade | 0.4 F (0.3 to 0.5) per decade | 1909 to 2024 | 87 | Rise |
A year is complete when all 12 months have at least 20 days of both daily maximum and daily minimum readings. The annual mean is the mean of the monthly means. The trend describes this one station over this period; it does not say what caused the change.
Extremes by Year
1906 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 50.6 C (123.1 F) | 1994 | 46.7 C (116.1 F) | 105 |
| Coldest night (TNn) | -13.3 C (8.1 F) | 1913 | -6.1 C (21.0 F) | 105 |
| Wettest day (Rx1day) | 137.2 mm (5.4 in) | 1906 | 30.7 mm (1.2 in) | 106 |
| Wettest five days (Rx5day) | 138.7 mm (5.5 in) | 1906 | 44.0 mm (1.7 in) | 106 |
| Longest dry spell (CDD) | 150 days | 1972 | 77 days | 106 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1906 | n/a |
| 1908 | 37.2 C (99.0 F) |
| 1909 | 45.0 C (113.0 F) |
| 1910 | 46.1 C (115.0 F) |
| 1911 | 43.3 C (109.9 F) |
| 1912 | 45.0 C (113.0 F) |
| 1913 | 45.6 C (114.1 F) |
| 1914 | 44.4 C (111.9 F) |
| 1915 | 45.6 C (114.1 F) |
| 1916 | 45.6 C (114.1 F) |
| 1931 | 35.0 C (95.0 F) |
| 1932 | 46.1 C (115.0 F) |
| 1933 | 46.7 C (116.1 F) |
| 1934 | 45.6 C (114.1 F) |
| 1935 | 43.3 C (109.9 F) |
| 1936 | 46.7 C (116.1 F) |
| 1937 | 47.2 C (117.0 F) |
| 1938 | 46.1 C (115.0 F) |
| 1939 | 45.6 C (114.1 F) |
| 1940 | 48.3 C (118.9 F) |
| 1941 | 45.0 C (113.0 F) |
| 1942 | 47.2 C (117.0 F) |
| 1943 | 47.2 C (117.0 F) |
| 1944 | 46.7 C (116.1 F) |
| 1945 | 45.6 C (114.1 F) |
| 1946 | 44.4 C (111.9 F) |
| 1947 | 46.7 C (116.1 F) |
| 1948 | 45.6 C (114.1 F) |
| 1949 | 44.4 C (111.9 F) |
| 1950 | 45.6 C (114.1 F) |
| 1951 | 46.7 C (116.1 F) |
| 1952 | 46.1 C (115.0 F) |
| 1953 | 47.2 C (117.0 F) |
| 1954 | 46.7 C (116.1 F) |
| 1955 | 46.7 C (116.1 F) |
| 1956 | 46.7 C (116.1 F) |
| 1957 | 47.8 C (118.0 F) |
| 1958 | 48.9 C (120.0 F) |
| 1959 | 47.2 C (117.0 F) |
| 1960 | 47.8 C (118.0 F) |
| 1961 | 46.1 C (115.0 F) |
| 1962 | 46.7 C (116.1 F) |
| 1963 | 46.1 C (115.0 F) |
| 1964 | 45.0 C (113.0 F) |
| 1965 | 45.6 C (114.1 F) |
| 1966 | 44.4 C (111.9 F) |
| 1967 | 44.4 C (111.9 F) |
| 1968 | 46.7 C (116.1 F) |
| 1969 | 47.8 C (118.0 F) |
| 1970 | 47.8 C (118.0 F) |
| 1971 | 46.7 C (116.1 F) |
| 1972 | 46.7 C (116.1 F) |
| 1973 | 47.2 C (117.0 F) |
| 1974 | 47.2 C (117.0 F) |
| 1975 | 45.6 C (114.1 F) |
| 1976 | 46.7 C (116.1 F) |
| 1977 | 46.7 C (116.1 F) |
| 1978 | 46.7 C (116.1 F) |
| 1979 | 47.2 C (117.0 F) |
| 1980 | 47.2 C (117.0 F) |
| 1981 | 46.7 C (116.1 F) |
| 1982 | 46.1 C (115.0 F) |
| 1983 | 48.3 C (118.9 F) |
| 1984 | 45.6 C (114.1 F) |
| 1985 | 47.8 C (118.0 F) |
| 1986 | 48.9 C (120.0 F) |
| 1987 | 46.1 C (115.0 F) |
| 1988 | 46.7 C (116.1 F) |
| 1989 | 46.1 C (115.0 F) |
| 1990 | 48.3 C (118.9 F) |
| 1991 | 44.4 C (111.9 F) |
| 1992 | 45.0 C (113.0 F) |
| 1993 | 49.4 C (120.9 F) |
| 1994 | 50.6 C (123.1 F) |
| 1995 | 50.6 C (123.1 F) |
| 1996 | 47.2 C (117.0 F) |
| 1997 | 46.7 C (116.1 F) |
| 1998 | 48.9 C (120.0 F) |
| 1999 | 46.7 C (116.1 F) |
| 2000 | 46.7 C (116.1 F) |
| 2001 | 47.8 C (118.0 F) |
| 2002 | 45.6 C (114.1 F) |
| 2003 | 47.2 C (117.0 F) |
| 2004 | 45.0 C (113.0 F) |
| 2005 | 46.1 C (115.0 F) |
| 2006 | 47.2 C (117.0 F) |
| 2007 | 45.6 C (114.1 F) |
| 2008 | 45.6 C (114.1 F) |
| 2009 | 45.6 C (114.1 F) |
| 2010 | 45.0 C (113.0 F) |
| 2011 | 46.7 C (116.1 F) |
| 2012 | 45.6 C (114.1 F) |
| 2013 | 46.7 C (116.1 F) |
| 2014 | 42.2 C (108.0 F) |
| 2015 | 45.0 C (113.0 F) |
| 2016 | 47.8 C (118.0 F) |
| 2017 | 47.8 C (118.0 F) |
| 2018 | 45.6 C (114.1 F) |
| 2019 | 37.2 C (99.0 F) |
| 2020 | 28.9 C (84.0 F) |
| 2021 | 46.7 C (116.1 F) |
| 2022 | 45.6 C (114.1 F) |
| 2023 | 46.7 C (116.1 F) |
| 2024 | 47.2 C (117.0 F) |
| 2025 | 47.2 C (117.0 F) |
| 2026 | 47.2 C (117.0 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1906 | n/a |
| 1908 | -3.3 C (26.1 F) |
| 1909 | -8.9 C (16.0 F) |
| 1910 | -7.8 C (18.0 F) |
| 1911 | -7.2 C (19.0 F) |
| 1912 | -7.8 C (18.0 F) |
| 1913 | -13.3 C (8.1 F) |
| 1914 | -5.0 C (23.0 F) |
| 1915 | -6.7 C (19.9 F) |
| 1916 | -3.3 C (26.1 F) |
| 1931 | -6.1 C (21.0 F) |
| 1932 | -8.9 C (16.0 F) |
| 1933 | -8.3 C (17.1 F) |
| 1934 | -8.3 C (17.1 F) |
| 1935 | -6.7 C (19.9 F) |
| 1936 | -7.2 C (19.0 F) |
| 1937 | -10.6 C (12.9 F) |
| 1938 | -6.1 C (21.0 F) |
| 1939 | -5.6 C (21.9 F) |
| 1940 | -7.8 C (18.0 F) |
| 1941 | -5.6 C (21.9 F) |
| 1942 | -6.1 C (21.0 F) |
| 1943 | -5.6 C (21.9 F) |
| 1944 | -7.2 C (19.0 F) |
| 1945 | -6.1 C (21.0 F) |
| 1946 | -7.2 C (19.0 F) |
| 1947 | -6.1 C (21.0 F) |
| 1948 | -7.8 C (18.0 F) |
| 1949 | -7.8 C (18.0 F) |
| 1950 | -11.1 C (12.0 F) |
| 1951 | -6.7 C (19.9 F) |
| 1952 | -6.1 C (21.0 F) |
| 1953 | -10.0 C (14.0 F) |
| 1954 | -8.9 C (16.0 F) |
| 1955 | -8.3 C (17.1 F) |
| 1956 | -8.3 C (17.1 F) |
| 1957 | -6.7 C (19.9 F) |
| 1958 | -6.7 C (19.9 F) |
| 1959 | -6.1 C (21.0 F) |
| 1960 | -8.9 C (16.0 F) |
| 1961 | -4.4 C (24.1 F) |
| 1962 | -5.6 C (21.9 F) |
| 1963 | -7.8 C (18.0 F) |
| 1964 | -9.4 C (15.1 F) |
| 1965 | -4.4 C (24.1 F) |
| 1966 | -6.7 C (19.9 F) |
| 1967 | -8.9 C (16.0 F) |
| 1968 | -7.8 C (18.0 F) |
| 1969 | -6.1 C (21.0 F) |
| 1970 | -6.7 C (19.9 F) |
| 1971 | -9.4 C (15.1 F) |
| 1972 | -6.1 C (21.0 F) |
| 1973 | -5.0 C (23.0 F) |
| 1974 | -9.4 C (15.1 F) |
| 1975 | -11.7 C (10.9 F) |
| 1976 | -7.8 C (18.0 F) |
| 1977 | -5.6 C (21.9 F) |
| 1978 | -7.8 C (18.0 F) |
| 1979 | -6.7 C (19.9 F) |
| 1980 | -3.3 C (26.1 F) |
| 1981 | -4.4 C (24.1 F) |
| 1982 | -3.3 C (26.1 F) |
| 1983 | -3.9 C (25.0 F) |
| 1984 | -5.0 C (23.0 F) |
| 1985 | -5.6 C (21.9 F) |
| 1986 | -2.8 C (27.0 F) |
| 1987 | -6.1 C (21.0 F) |
| 1988 | -7.8 C (18.0 F) |
| 1989 | -6.1 C (21.0 F) |
| 1990 | -5.0 C (23.0 F) |
| 1991 | -5.0 C (23.0 F) |
| 1992 | -5.0 C (23.0 F) |
| 1993 | -5.0 C (23.0 F) |
| 1994 | -6.1 C (21.0 F) |
| 1995 | -1.7 C (28.9 F) |
| 1996 | -5.0 C (23.0 F) |
| 1997 | -3.9 C (25.0 F) |
| 1998 | -8.3 C (17.1 F) |
| 1999 | -5.6 C (21.9 F) |
| 2000 | -5.6 C (21.9 F) |
| 2001 | -4.4 C (24.1 F) |
| 2002 | -5.0 C (23.0 F) |
| 2003 | -7.2 C (19.0 F) |
| 2004 | -4.4 C (24.1 F) |
| 2005 | -5.6 C (21.9 F) |
| 2006 | -5.6 C (21.9 F) |
| 2007 | -3.3 C (26.1 F) |
| 2008 | -3.3 C (26.1 F) |
| 2009 | -2.8 C (27.0 F) |
| 2010 | -5.6 C (21.9 F) |
| 2011 | -7.2 C (19.0 F) |
| 2012 | -2.8 C (27.0 F) |
| 2013 | -10.0 C (14.0 F) |
| 2014 | -3.9 C (25.0 F) |
| 2015 | -5.0 C (23.0 F) |
| 2016 | -3.9 C (25.0 F) |
| 2017 | -3.9 C (25.0 F) |
| 2018 | -3.3 C (26.1 F) |
| 2019 | -4.4 C (24.1 F) |
| 2020 | -7.2 C (19.0 F) |
| 2021 | -2.8 C (27.0 F) |
| 2022 | -5.0 C (23.0 F) |
| 2023 | -2.8 C (27.0 F) |
| 2024 | -4.4 C (24.1 F) |
| 2025 | -5.6 C (21.9 F) |
| 2026 | -0.6 C (30.9 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1906 | 137.2 mm (5.4 in) |
| 1908 | 18.5 mm (0.7 in) |
| 1909 | 30.5 mm (1.2 in) |
| 1910 | 29.7 mm (1.2 in) |
| 1911 | 33.8 mm (1.3 in) |
| 1912 | 35.8 mm (1.4 in) |
| 1913 | 34.5 mm (1.4 in) |
| 1914 | 35.8 mm (1.4 in) |
| 1915 | 47.8 mm (1.9 in) |
| 1916 | 20.6 mm (0.8 in) |
| 1931 | 21.8 mm (0.9 in) |
| 1932 | 27.9 mm (1.1 in) |
| 1933 | 38.1 mm (1.5 in) |
| 1934 | 24.9 mm (1.0 in) |
| 1935 | 23.6 mm (0.9 in) |
| 1936 | 50.8 mm (2.0 in) |
| 1937 | 35.8 mm (1.4 in) |
| 1938 | 20.6 mm (0.8 in) |
| 1939 | 14.0 mm (0.6 in) |
| 1940 | 31.8 mm (1.3 in) |
| 1941 | 56.1 mm (2.2 in) |
| 1942 | 26.9 mm (1.1 in) |
| 1943 | 21.1 mm (0.8 in) |
| 1944 | 38.4 mm (1.5 in) |
| 1945 | 28.4 mm (1.1 in) |
| 1946 | 74.2 mm (2.9 in) |
| 1947 | 21.8 mm (0.9 in) |
| 1948 | 16.3 mm (0.6 in) |
| 1949 | 31.2 mm (1.2 in) |
| 1950 | 48.3 mm (1.9 in) |
| 1951 | 47.5 mm (1.9 in) |
| 1952 | 35.6 mm (1.4 in) |
| 1953 | 20.6 mm (0.8 in) |
| 1954 | 43.7 mm (1.7 in) |
| 1955 | 46.2 mm (1.8 in) |
| 1956 | 23.9 mm (0.9 in) |
| 1957 | 35.6 mm (1.4 in) |
| 1958 | 28.7 mm (1.1 in) |
| 1959 | 38.4 mm (1.5 in) |
| 1960 | 21.6 mm (0.9 in) |
| 1961 | 23.9 mm (0.9 in) |
| 1962 | 29.2 mm (1.1 in) |
| 1963 | 40.6 mm (1.6 in) |
| 1964 | 30.5 mm (1.2 in) |
| 1965 | 36.8 mm (1.4 in) |
| 1966 | 29.0 mm (1.1 in) |
| 1967 | 47.0 mm (1.9 in) |
| 1968 | 35.8 mm (1.4 in) |
| 1969 | 25.9 mm (1.0 in) |
| 1970 | 30.0 mm (1.2 in) |
| 1971 | 39.4 mm (1.6 in) |
| 1972 | 81.3 mm (3.2 in) |
| 1973 | 24.9 mm (1.0 in) |
| 1974 | 17.5 mm (0.7 in) |
| 1975 | 21.3 mm (0.8 in) |
| 1976 | 31.2 mm (1.2 in) |
| 1977 | 43.2 mm (1.7 in) |
| 1978 | 49.5 mm (1.9 in) |
| 1979 | 31.8 mm (1.3 in) |
| 1980 | 16.8 mm (0.7 in) |
| 1981 | 22.4 mm (0.9 in) |
| 1982 | 39.9 mm (1.6 in) |
| 1983 | 45.5 mm (1.8 in) |
| 1984 | 34.3 mm (1.4 in) |
| 1985 | 51.6 mm (2.0 in) |
| 1986 | 13.7 mm (0.5 in) |
| 1987 | 29.7 mm (1.2 in) |
| 1988 | 30.7 mm (1.2 in) |
| 1989 | 20.1 mm (0.8 in) |
| 1990 | 41.4 mm (1.6 in) |
| 1991 | 19.8 mm (0.8 in) |
| 1992 | 33.0 mm (1.3 in) |
| 1993 | 44.7 mm (1.8 in) |
| 1994 | 30.0 mm (1.2 in) |
| 1995 | 53.8 mm (2.1 in) |
| 1996 | 41.9 mm (1.6 in) |
| 1997 | 30.7 mm (1.2 in) |
| 1998 | 29.0 mm (1.1 in) |
| 1999 | 51.3 mm (2.0 in) |
| 2000 | 29.0 mm (1.1 in) |
| 2001 | 31.2 mm (1.2 in) |
| 2002 | 24.9 mm (1.0 in) |
| 2003 | 21.6 mm (0.9 in) |
| 2004 | 23.6 mm (0.9 in) |
| 2005 | 39.4 mm (1.6 in) |
| 2006 | 53.8 mm (2.1 in) |
| 2007 | 30.0 mm (1.2 in) |
| 2008 | 23.9 mm (0.9 in) |
| 2009 | 13.2 mm (0.5 in) |
| 2010 | 32.3 mm (1.3 in) |
| 2011 | 26.4 mm (1.0 in) |
| 2012 | 51.3 mm (2.0 in) |
| 2013 | 30.2 mm (1.2 in) |
| 2014 | 37.6 mm (1.5 in) |
| 2015 | 36.3 mm (1.4 in) |
| 2016 | 20.3 mm (0.8 in) |
| 2017 | 20.3 mm (0.8 in) |
| 2018 | 26.7 mm (1.1 in) |
| 2019 | 45.7 mm (1.8 in) |
| 2020 | 6.9 mm (0.27 in) |
| 2021 | 35.6 mm (1.4 in) |
| 2022 | 40.1 mm (1.6 in) |
| 2023 | 24.1 mm (0.9 in) |
| 2024 | 52.1 mm (2.1 in) |
| 2025 | 22.6 mm (0.9 in) |
| 2026 | 15.0 mm (0.6 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1906 | 138.7 mm (5.5 in) |
| 1908 | 41.8 mm (1.6 in) |
| 1909 | 31.5 mm (1.2 in) |
| 1910 | 42.6 mm (1.7 in) |
| 1911 | 47.3 mm (1.9 in) |
| 1912 | 56.9 mm (2.2 in) |
| 1913 | 63.7 mm (2.5 in) |
| 1914 | 82.8 mm (3.3 in) |
| 1915 | 52.6 mm (2.1 in) |
| 1916 | 52.6 mm (2.1 in) |
| 1931 | 37.1 mm (1.5 in) |
| 1932 | 40.4 mm (1.6 in) |
| 1933 | 47.5 mm (1.9 in) |
| 1934 | 31.0 mm (1.2 in) |
| 1935 | 37.6 mm (1.5 in) |
| 1936 | 57.1 mm (2.2 in) |
| 1937 | 47.5 mm (1.9 in) |
| 1938 | 33.1 mm (1.3 in) |
| 1939 | 14.3 mm (0.6 in) |
| 1940 | 54.7 mm (2.2 in) |
| 1941 | 60.8 mm (2.4 in) |
| 1942 | 31.2 mm (1.2 in) |
| 1943 | 44.4 mm (1.7 in) |
| 1944 | 40.2 mm (1.6 in) |
| 1945 | 42.9 mm (1.7 in) |
| 1946 | 104.7 mm (4.1 in) |
| 1947 | 26.6 mm (1.0 in) |
| 1948 | 32.4 mm (1.3 in) |
| 1949 | 35.3 mm (1.4 in) |
| 1950 | 48.3 mm (1.9 in) |
| 1951 | 57.9 mm (2.3 in) |
| 1952 | 46.5 mm (1.8 in) |
| 1953 | 24.4 mm (1.0 in) |
| 1954 | 62.0 mm (2.4 in) |
| 1955 | 60.3 mm (2.4 in) |
| 1956 | 24.7 mm (1.0 in) |
| 1957 | 49.9 mm (2.0 in) |
| 1958 | 28.7 mm (1.1 in) |
| 1959 | 50.1 mm (2.0 in) |
| 1960 | 39.9 mm (1.6 in) |
| 1961 | 29.2 mm (1.1 in) |
| 1962 | 29.2 mm (1.1 in) |
| 1963 | 51.3 mm (2.0 in) |
| 1964 | 36.6 mm (1.4 in) |
| 1965 | 74.4 mm (2.9 in) |
| 1966 | 56.0 mm (2.2 in) |
| 1967 | 94.5 mm (3.7 in) |
| 1968 | 43.7 mm (1.7 in) |
| 1969 | 33.0 mm (1.3 in) |
| 1970 | 52.6 mm (2.1 in) |
| 1971 | 62.0 mm (2.4 in) |
| 1972 | 99.8 mm (3.9 in) |
| 1973 | 26.2 mm (1.0 in) |
| 1974 | 26.6 mm (1.0 in) |
| 1975 | 34.6 mm (1.4 in) |
| 1976 | 31.2 mm (1.2 in) |
| 1977 | 50.1 mm (2.0 in) |
| 1978 | 66.7 mm (2.6 in) |
| 1979 | 45.8 mm (1.8 in) |
| 1980 | 34.8 mm (1.4 in) |
| 1981 | 24.2 mm (1.0 in) |
| 1982 | 52.5 mm (2.1 in) |
| 1983 | 95.5 mm (3.8 in) |
| 1984 | 44.2 mm (1.7 in) |
| 1985 | 51.6 mm (2.0 in) |
| 1986 | 24.3 mm (1.0 in) |
| 1987 | 44.2 mm (1.7 in) |
| 1988 | 30.7 mm (1.2 in) |
| 1989 | 27.4 mm (1.1 in) |
| 1990 | 67.3 mm (2.6 in) |
| 1991 | 25.9 mm (1.0 in) |
| 1992 | 51.1 mm (2.0 in) |
| 1993 | 71.4 mm (2.8 in) |
| 1994 | 40.4 mm (1.6 in) |
| 1995 | 61.2 mm (2.4 in) |
| 1996 | 63.6 mm (2.5 in) |
| 1997 | 33.5 mm (1.3 in) |
| 1998 | 39.1 mm (1.5 in) |
| 1999 | 63.0 mm (2.5 in) |
| 2000 | 50.9 mm (2.0 in) |
| 2001 | 31.2 mm (1.2 in) |
| 2002 | 24.9 mm (1.0 in) |
| 2003 | 32.5 mm (1.3 in) |
| 2004 | 37.1 mm (1.5 in) |
| 2005 | 48.0 mm (1.9 in) |
| 2006 | 55.6 mm (2.2 in) |
| 2007 | 40.9 mm (1.6 in) |
| 2008 | 26.4 mm (1.0 in) |
| 2009 | 22.3 mm (0.9 in) |
| 2010 | 63.6 mm (2.5 in) |
| 2011 | 39.6 mm (1.6 in) |
| 2012 | 58.4 mm (2.3 in) |
| 2013 | 43.1 mm (1.7 in) |
| 2014 | 58.2 mm (2.3 in) |
| 2015 | 54.1 mm (2.1 in) |
| 2016 | 46.7 mm (1.8 in) |
| 2017 | 21.9 mm (0.9 in) |
| 2018 | 33.1 mm (1.3 in) |
| 2019 | 45.7 mm (1.8 in) |
| 2020 | 12.8 mm (0.5 in) |
| 2021 | 40.6 mm (1.6 in) |
| 2022 | 60.2 mm (2.4 in) |
| 2023 | 28.8 mm (1.1 in) |
| 2024 | 57.7 mm (2.3 in) |
| 2025 | 33.8 mm (1.3 in) |
| 2026 | 19.6 mm (0.8 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1906 | 98 days |
| 1908 | 30 days |
| 1909 | 95 days |
| 1910 | 90 days |
| 1911 | 116 days |
| 1912 | 63 days |
| 1913 | 82 days |
| 1914 | 62 days |
| 1915 | 76 days |
| 1916 | 85 days |
| 1931 | 34 days |
| 1932 | 48 days |
| 1933 | 66 days |
| 1934 | 54 days |
| 1935 | 75 days |
| 1936 | 107 days |
| 1937 | 70 days |
| 1938 | 99 days |
| 1939 | 64 days |
| 1940 | 56 days |
| 1941 | 75 days |
| 1942 | 75 days |
| 1943 | 142 days |
| 1944 | 53 days |
| 1945 | 114 days |
| 1946 | 101 days |
| 1947 | 83 days |
| 1948 | 80 days |
| 1949 | 76 days |
| 1950 | 105 days |
| 1951 | 62 days |
| 1952 | 54 days |
| 1953 | 81 days |
| 1954 | 68 days |
| 1955 | 143 days |
| 1956 | 132 days |
| 1957 | 48 days |
| 1958 | 66 days |
| 1959 | 94 days |
| 1960 | 81 days |
| 1961 | 94 days |
| 1962 | 98 days |
| 1963 | 108 days |
| 1964 | 70 days |
| 1965 | 41 days |
| 1966 | 120 days |
| 1967 | 64 days |
| 1968 | 116 days |
| 1969 | 72 days |
| 1970 | 81 days |
| 1971 | 95 days |
| 1972 | 150 days |
| 1973 | 97 days |
| 1974 | 108 days |
| 1975 | 90 days |
| 1976 | 80 days |
| 1977 | 98 days |
| 1978 | 58 days |
| 1979 | 65 days |
| 1980 | 60 days |
| 1981 | 56 days |
| 1982 | 61 days |
| 1983 | 81 days |
| 1984 | 91 days |
| 1985 | 78 days |
| 1986 | 58 days |
| 1987 | 59 days |
| 1988 | 88 days |
| 1989 | 49 days |
| 1990 | 33 days |
| 1991 | 114 days |
| 1992 | 38 days |
| 1993 | 54 days |
| 1994 | 38 days |
| 1995 | 79 days |
| 1996 | 71 days |
| 1997 | 51 days |
| 1998 | 93 days |
| 1999 | 98 days |
| 2000 | 113 days |
| 2001 | 38 days |
| 2002 | 93 days |
| 2003 | 105 days |
| 2004 | 101 days |
| 2005 | 74 days |
| 2006 | 77 days |
| 2007 | 94 days |
| 2008 | 66 days |
| 2009 | 92 days |
| 2010 | 130 days |
| 2011 | 28 days |
| 2012 | 59 days |
| 2013 | 83 days |
| 2014 | 59 days |
| 2015 | 33 days |
| 2016 | 45 days |
| 2017 | 75 days |
| 2018 | 109 days |
| 2019 | 38 days |
| 2020 | 31 days |
| 2021 | 33 days |
| 2022 | 45 days |
| 2023 | 109 days |
| 2024 | 120 days |
| 2025 | 43 days |
| 2026 | 124 days |
Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.
Frost Dates and Growing Season
87 years with a frostAcross 87 years with a frost, the median last spring frost at Casa Grande Nm falls on 15 March and the median first autumn frost on 18 November, which leaves a median of 249 days between them.
In 1984 to 2024 the median growing season was 267 days. That is 32 days more than in 1909 to 1956.
Fitted over all years, the growing season changes by +4.0 days per decade at this station.
| Measure | Median, all years | Earliest period (1909 to 1956) | Recent period (1984 to 2024) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 15 March | 25 March | 1 March | 24 days earlier | -2.7 days per decade |
| First autumn frost | 18 November | 12 November | 23 November | 11 days later | +1.2 days per decade |
| Growing days | 249 days | 235 days | 267 days | 32 days more | +4.0 days per decade |
A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.
Rainfall Return Levels
94 years, 1909 to 2024A day with at least 31.9 mm (1.3 in) of rain is expected about once in 2 years. A day with at least 71.3 mm (2.8 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 31.9 mm (1.3 in) | |
| 5 years | 42.8 mm (1.7 in) | |
| 10 years | 49.9 mm (2.0 in) | |
| 25 years | 58.6 mm (2.3 in) | |
| 50 years | 65.0 mm (2.6 in) | |
| 100 years | 71.3 mm (2.8 in) | Longer than the 94 years of record |
The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 94 years of values from 1909 to 2024.
A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.
The largest wettest-day totals in the fit: 81.3 mm (3.2 in) in 1972; 74.2 mm (2.9 in) in 1946; 56.1 mm (2.2 in) in 1941.
Station Changes
2 suspected2 changes were suspected in the annual mean temperature of Casa Grande Nm, at 1980 and 1991. Each is measured against neighbouring stations.
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1980 ran 0.2 C (0.4 F) higher than in the years before (possible change).
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1991 ran 0.5 C (0.8 F) lower than in the years before (likely change).
| Year | Shift (C) | Shift (F) | Strength | Neighbours |
|---|---|---|---|---|
| 1980 | +0.2 | +0.4 | possible | 5 |
| 1991 | -0.5 | -0.8 | likely | 5 |
Possible change at the station (a move, a new instrument or a new site); the record is kept as measured. A "likely" change has a larger test statistic than a "possible" one. Neither says why the station differs from its neighbours. How changes are found, and the largest ones.
Climate Twins
2002 to 2024 against 1961 to 1990Over 2002 to 2024, Casa Grande Nm had a mean temperature of 21.8 C (71.2 F) and 195.9 mm (7.7 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Buckeye (United States, 106 km away), Alamo Dam (United States, 234 km away) and Blythe (United States, 293 km away).
| Twin station | Country | Distance away | Mean temperature, 1961-1990 | Rain a year, 1961-1990 | Climate difference |
|---|---|---|---|---|---|
| Buckeye | United States | 106 km (66 mi) | 21.7 C (71.0 F) | 182.2 mm (7.2 in) | 0.49 |
| Alamo Dam | United States | 234 km (145 mi) | 21.4 C (70.4 F) | 237.9 mm (9.4 in) | 0.60 |
| Blythe | United States | 293 km (182 mi) | 22.0 C (71.5 F) | 88.5 mm (3.5 in) | 0.77 |
Twins are stations, not cities. A twin is one of the three stations at least 100 km away whose earlier climate is closest to this station's recent one, so a close match does not mean the two places look alike in other ways. A station move or a gap in a record can change that station's averages. The list describes past climate; it is not a forecast and does not say what caused any change. How twins are found, and a search for any station.
Download the Data
Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-15 (15 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2026-10-15).