January weather in Merrimac, WI
The average temperature in Merrimac in January is 18.5°F (9.6°F–27.4°F). Average precipitation: 1.50 inches.
January is a winter month in Merrimac, and is cooler than the annual average of 47.1°F. Daily temperatures swing about 17.8°F between overnight low and afternoon high. Expect about 7 days with precipitation. Daylight averages about 9h 7m. For travel, January is cold.
Avg High
27.4°F
Avg Low
9.6°F
Precipitation
1.50 in
Daylight
9h 7m
January records in Merrimac
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| January 1 | 48.9°F (2007) | -13.0°F (2018) | 0.38 in (2019) |
| January 2 | 42.1°F (2007) | -11.0°F (2013) | 0.25 in (2006) |
| January 3 | 46.0°F (2020) | -17.0°F (2014) | 0.60 in (2006) |
| January 4 | 53.1°F (2007) | -15.0°F (2014) | 0.12 in (2009) |
| January 5 | 48.9°F (2007) | -13.0°F (2018) | 0.10 in (2023) |
| January 6 | 52.0°F (2012) | -17.0°F (2014) | 0.15 in (2024) |
| January 7 | 48.0°F (2012) | -18.9°F (2014) | 0.66 in (2019) |
| January 8 | 46.9°F (2019) | -15.0°F (2014) | 0.45 in (2019) |
| January 9 | 54.0°F (2026) | -18.9°F (2014) | 0.47 in (2008) |
| January 10 | 46.9°F (2012) | -18.9°F (2014) | 0.50 in (2024) |
| January 11 | 53.1°F (2012) | -9.0°F (2016) | 0.49 in (2017) |
| January 12 | 54.0°F (2012) | -9.0°F (2016) | 0.18 in (2017) |
| January 13 | 53.1°F (2006) | -11.0°F (2015) | 0.67 in (2024) |
| January 14 | 51.1°F (2026) | -11.9°F (2009) | 0.10 in (2007) |
| January 15 | 41.0°F (2014) | -14.1°F (2009) | 0.29 in (2021) |
| January 16 | 42.1°F (2006) | -26.0°F (2009) | 0.18 in (2026) |
| January 17 | 46.0°F (2006) | -27.0°F (2009) | 0.61 in (2017) |
| January 18 | 50.0°F (2025) | -9.9°F (2016) | 0.51 in (2020) |
| January 19 | 45.0°F (2013) | -14.1°F (2008) | 0.36 in (2023) |
| January 20 | 46.0°F (2013) | -23.1°F (2008) | 0.26 in (2017) |
| January 21 | 50.0°F (2018) | -18.9°F (2019) | 0.27 in (2015) |
| January 22 | 46.0°F (2017) | -18.0°F (2019) | 0.55 in (2018) |
| January 23 | 46.0°F (2017) | -18.0°F (2026) | 0.35 in (2019) |
| January 24 | 41.0°F (2017) | -18.9°F (2026) | 0.45 in (2010) |
| January 25 | 41.0°F (2017) | -16.1°F (2008) | 0.57 in (2017) |
| January 26 | 41.0°F (2017) | -27.9°F (2019) | 0.47 in (2016) |
| January 27 | 46.9°F (2018) | -22.0°F (2019) | 0.21 in (2024) |
| January 28 | 53.1°F (2006) | -16.1°F (2014) | 0.42 in (2019) |
| January 29 | 50.0°F (2025) | -16.1°F (2014) | 0.72 in (2006) |
| January 30 | 55.9°F (2013) | -26.0°F (2019) | 0.72 in (2013) |
| January 31 | 60.1°F (2025) | -33.0°F (2019) | 0.43 in (2013) |