| Month | Average (°F) | Record (°F) | Average (inches) | |||
|---|---|---|---|---|---|---|
| High ☀️ | Low 🌙 | High ☀️ | Low 🌙 | Precipitation 💧 | Snow ❄️ | |
| January | 27.7 | 11.1 | 59 | -33 | 1.6 | 11.3 |
| February | 31.6 | 14.2 | 72 | -29 | 1.6 | 9.7 |
| March | 43.3 | 24.4 | 83 | -19 | 2.1 | 4.8 |
| April | 56.0 | 35.9 | 88 | 4 | 3.9 | 1.9 |
| May | 68.2 | 47.2 | 94 | 23 | 4.1 | 0.2 |
| June | 78.1 | 57.0 | 100 | 31 | 4.9 | 0.0 |
| July | 81.7 | 61.0 | 103 | 41 | 4.1 | 0.0 |
| August | 80.3 | 59.8 | 101 | 39 | 4.2 | 0.0 |
| September | 73.5 | 51.6 | 98 | 26 | 3.4 | 0.0 |
| October | 60.4 | 39.8 | 87 | 10 | 2.8 | 0.1 |
| November | 45.7 | 28.6 | 76 | -14 | 2.2 | 1.8 |
| December | 33.3 | 18.1 | 67 | -25 | 1.9 | 9.8 |
| Entire year | 56.8 | 37.4 | 103 | -33 | 36.8 | 41.1 |
|
More Oconomowoc Weather Records
1893–2024
|
||
|---|---|---|
| Highest daily low | 80 °F | August 7, 1947 |
| Lowest daily high | -16 °F | January 19, 1994 |
| Greatest daily range (Difference of high and low) |
58 °F | February 28, 2024 |
| Greatest difference in daily high over two conscutive days |
49 °F | Jan 19–20, 1996 |
| Most daily precipitation | 5.4 inches | August 10, 1995 |
| Most monthly precipitation | 11.6 inches | June 2008 |
| Most yearly precipitation | 47.2 inches | 2018 |
| Most yearly days with precipitation | 148 | 2014 |
| Earliest snow in season | October 12 | 2006 |
| Latest snow in season | May 10 | 1990 |
| Most daily snow | 12.5 inches | January 13, 2024 |
| Most monthly snow | 42.4 inches | December 2008 |
| Most yearly snow | 100.4 inches | 2008 |
| Most snow in a winter | 85.0 inches | 2007–2008 |
| Greatest snow accumulation | 25.0 inches | January 25, 1979 |
| Earliest freeze | September 20 | 1956 |
| Earliest day ≥ 80 °F | March 21 | 2012 |
| Earliest day ≥ 90 °F | May 5 | 1949 |
| Latest freeze | June 4 | 1945 |
| Latest day ≥ 80 °F | October 23 | 1963 |
| Latest day ≥ 90 °F | September 29 | 1953 |
| Most days in a year < 0 °F | 45 | 1977 |
| Most days in a year < 32 °F | 170 | 1976 |
| Most days in a year ≥ 80 °F | 96 | 1895 |
| Most days in a year ≥ 90 °F | 37 | 1988 |
| Most days in a year ≥ 100 °F | 4 | 2012 |
|
Oconomowoc Weather Streaks
Most consecutive days...
|
||
|---|---|---|
| With precipitation | 12 days | Jan 28 – Feb 8, 2013 |
| Without precipitation | 30 days | Oct 18 – Nov 16, 1952 |
| With snow | 9 days | Jan 31 – Feb 8, 2013 |
| High temperature at or below freezing |
49 days | Jan 2 – Feb 19, 1979 |
| High temperature ≥ 80 °F | 30 days | Jul 22 – Aug 20, 1958 |
| High temperature ≥ 90 °F | 13 days | Jun 28 – Jul 10, 2012 |
| High temperature ≥ 100 °F | 3 days | Jul 5–7, 2012 |
| Years | Station | Coordinates |
|---|---|---|
| 1893–2024 | Oconomowoc WWTP | location |