| Month | Average (°F) | Record (°F) | Average (inches) | |||
|---|---|---|---|---|---|---|
| High ☀️ | Low 🌙 | High ☀️ | Low 🌙 | Precipitation 💧 | Snow ❄️ | |
| January | 35.8 | 19.7 | 73 | -23 | 2.3 | 6.3 |
| February | 40.8 | 23.6 | 76 | -25 | 2.0 | 2.8 |
| March | 52.3 | 32.8 | 89 | -10 | 2.6 | 1.1 |
| April | 64.9 | 42.9 | 94 | 15 | 4.2 | 0.3 |
| May | 75.0 | 53.5 | 101 | 25 | 4.9 | 0.0 |
| June | 83.7 | 63.2 | 105 | 32 | 4.6 | 0.0 |
| July | 86.2 | 66.7 | 113 | 45 | 4.1 | 0.0 |
| August | 84.8 | 64.8 | 106 | 35 | 3.5 | 0.0 |
| September | 79.3 | 57.1 | 104 | 20 | 3.1 | 0.0 |
| October | 66.7 | 45.3 | 96 | 12 | 3.4 | 0.0 |
| November | 52.0 | 34.2 | 83 | -3 | 3.0 | 0.5 |
| December | 40.2 | 24.8 | 72 | -22 | 2.3 | 2.9 |
| Entire year | 63.6 | 44.2 | 113 | -25 | 39.9 | 15.2 |
|
More Decatur Weather Records
1893–2024
|
||
|---|---|---|
| Highest daily low | 80 °F | July 22, 2011 |
| Lowest daily high | -6 °F | January 20, 1985 |
| Greatest daily range (Difference of high and low) |
57 °F | February 2, 1917 |
| Greatest difference in daily high over two conscutive days |
44 °F | Nov 29–30, 1905 |
| Most daily precipitation | 5.8 inches | September 14, 2008 |
| Most monthly precipitation | 16.7 inches | July 1992 |
| Most yearly precipitation | 60.6 inches | 1927 |
| Most yearly days with precipitation | 145 | 1951 |
| Earliest snow in season | October 21 | 1916 |
| Latest snow in season | May 2 | 1929 |
| Most daily snow | 13.5 inches | March 19, 1906 |
| Most monthly snow | 30.5 inches | December 1973 |
| Most yearly snow | 43.0 inches | 1960 |
| Most snow in a winter | 49.7 inches | 1981–1982 |
| Greatest snow accumulation | 22.0 inches | December 21, 1973 |
| Earliest freeze | September 20 | 1991 |
| Earliest day ≥ 80 °F | March 12 | 1990 |
| Earliest day ≥ 90 °F | April 11 | 1930 |
| Earliest day ≥ 100 °F | May 31 | 1934 |
| Latest freeze | May 26 | 1979 |
| Latest day ≥ 80 °F | November 19 | 1930 |
| Latest day ≥ 90 °F | October 15 | 1938 |
| Latest day ≥ 100 °F | September 29 | 1953 |
| Most days in a year < 0 °F | 22 | 1977 |
| Most days in a year < 32 °F | 136 | 1926 |
| Most days in a year ≥ 80 °F | 139 | 1956 |
| Most days in a year ≥ 90 °F | 79 | 1933 |
| Most days in a year ≥ 100 °F | 26 | 1936 |
| Most days in a year ≥ 110 °F | 1 | 1954 |
|
Decatur Weather Streaks
Most consecutive days...
|
||
|---|---|---|
| With precipitation | 13 days | Jun 6–18, 1945 |
| Without precipitation | 40 days | Sep 16 – Oct 25, 1956 |
| With snow | 7 days | Dec 6–12, 1950 |
| High temperature at or below freezing |
36 days | Dec 29, 1976 – Feb 2, 1977 |
| High temperature ≥ 80 °F | 84 days | May 28 – Aug 19, 1934 |
| High temperature ≥ 90 °F | 22 days | Jun 16 – Jul 7, 1933 |
| High temperature ≥ 100 °F | 14 days | Jul 4–17, 1936 |
| Years | Station | Coordinates |
|---|---|---|
| 1893–2024 | Decatur WTP | location |