Williams Bay, WI
Climate overview — based on NOAA 1991-2020 normals from LAKE GENEVA WWTP, WI US.
Year-round temperatures (°F)
Climate summary
Williams Bay has an annual average temperature of 49.4°F with about 36.9 inches of precipitation per year and 40.1 inches of snow. The warmest month is July (average high 85.5°F), and the coldest is January (average low 15.1°F). June is typically the wettest month (4.81 in) and February the driest (1.89 in). Snow typically falls from October through April.
Best time to visit Williams Bay
Full guide →Climate change signal
All-time records →27 of 366 (7.4%) of Williams Bay's all-time daily heat records have been set since 2015. If records were spread evenly across the station's history, only about 5% would fall in any given decade.
| 1940s | 27 | |
| 1950s | 57 | |
| 1960s | 55 | |
| 1970s | 38 | |
| 1980s | 65 | |
| 1990s | 70 | |
| 2000s | 27 | |
| 2010s | 0 | |
| 2020s | 27 |
Bars: number of all-time daily heat records still standing that were set in each decade.
Monthly averages
| Month | Avg High | Avg Low | Avg Temp | Precipitation | Snow | Rainy days |
|---|---|---|---|---|---|---|
| January | 30.0°F | 15.1°F | 22.6°F | 1.90 in | 13.9 in | 12 |
| February | 34.5°F | 17.0°F | 25.7°F | 1.89 in | 8.1 in | 9 |
| March | 45.2°F | 26.3°F | 35.7°F | 2.29 in | 4.8 in | 10 |
| April | 59.1°F | 37.2°F | 48.1°F | 3.45 in | 2.6 in | 13 |
| May | 71.6°F | 48.4°F | 60.0°F | 4.12 in | — | 13 |
| June | 81.1°F | 58.1°F | 69.6°F | 4.81 in | — | 11 |
| July | 85.5°F | 63.1°F | 74.3°F | 3.72 in | — | 9 |
| August | 83.4°F | 61.3°F | 72.3°F | 3.32 in | — | 10 |
| September | 76.3°F | 53.8°F | 65.1°F | 3.65 in | — | 10 |
| October | 62.7°F | 42.2°F | 52.4°F | 3.01 in | 0.2 in | 10 |
| November | 47.4°F | 30.8°F | 39.1°F | 2.48 in | 3.4 in | 11 |
| December | 35.1°F | 20.5°F | 27.8°F | 2.31 in | 7.1 in | 11 |
Climate twins of Williams Bay
Why these? →The most climatically similar US cities at least 140 miles away (by monthly temperature + precipitation pattern).