January weather in Fontana-on-Geneva Lake, WI
The average temperature in Fontana-on-Geneva Lake in January is 21.3°F (13.4°F–29.2°F). Average precipitation: 1.56 inches.
January is a winter month in Fontana-on-Geneva Lake, and is cooler than the annual average of 47.6°F. Daily temperatures swing about 15.8°F between overnight low and afternoon high. Daylight averages about 9h 13m. For travel, January is cold.
Avg High
29.2°F
Avg Low
13.4°F
Precipitation
1.56 in
Daylight
9h 13m
January records in Fontana-on-Geneva Lake
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| January 1 | 39.9°F (2012) | -4.0°F (2018) | 0.51 in (2019) |
| January 2 | 39.9°F (2020) | 8.1°F (2013) | 0.42 in (2021) |
| January 3 | 45.0°F (2020) | -7.1°F (2014) | 0.10 in (2023) |
| January 4 | 41.0°F (2023) | -6.0°F (2014) | 0.20 in (2015) |
| January 5 | 37.9°F (2023) | -2.9°F (2018) | 0.17 in (2014) |
| January 6 | 46.9°F (2012) | -8.0°F (2014) | 0.15 in (2015) |
| January 7 | 51.1°F (2012) | -8.0°F (2014) | 0.20 in (2019) |
| January 8 | 42.1°F (2026) | -8.0°F (2014) | 0.61 in (2019) |
| January 9 | 57.0°F (2026) | -8.0°F (2014) | 0.28 in (2024) |
| January 10 | 48.0°F (2020) | -2.9°F (2014) | 0.53 in (2017) |
| January 11 | 52.0°F (2018) | 0.0°F (2015) | 0.80 in (2013) |
| January 12 | 53.1°F (2012) | 1.0°F (2016) | 0.23 in (2024) |
| January 13 | 50.0°F (2013) | 1.9°F (2016) | 0.71 in (2024) |
| January 14 | 51.1°F (2026) | -2.9°F (2015) | 0.07 in (2024) |
| January 15 | 39.9°F (2016) | -4.0°F (2024) | 0.24 in (2021) |
| January 16 | 43.0°F (2023) | -2.9°F (2024) | 0.20 in (2026) |
| January 17 | 48.9°F (2023) | -7.1°F (2016) | 0.25 in (2023) |
| January 18 | 51.1°F (2025) | -6.0°F (2016) | 0.55 in (2020) |
| January 19 | 39.9°F (2013) | -2.9°F (2012) | 0.45 in (2019) |
| January 20 | 44.1°F (2013) | -2.9°F (2026) | 0.20 in (2021) |
| January 21 | 45.0°F (2018) | -11.9°F (2025) | 0.30 in (2012) |
| January 22 | 53.1°F (2017) | -11.9°F (2025) | 0.34 in (2018) |
| January 23 | 50.0°F (2018) | -15.0°F (2026) | 1.17 in (2018) |
| January 24 | 39.0°F (2012) | -17.0°F (2026) | 0.10 in (2020) |
| January 25 | 37.9°F (2015) | -14.1°F (2025) | 0.34 in (2020) |
| January 26 | 39.9°F (2024) | -7.1°F (2022) | 0.30 in (2021) |
| January 27 | 45.0°F (2018) | -7.1°F (2022) | 0.13 in (2015) |
| January 28 | 44.1°F (2018) | -5.1°F (2014) | 0.13 in (2013) |
| January 29 | 54.0°F (2013) | -5.1°F (2014) | 0.85 in (2013) |
| January 30 | 57.9°F (2013) | -6.0°F (2026) | 1.00 in (2013) |
| January 31 | 54.0°F (2025) | -5.1°F (2023) | 0.42 in (2021) |