March weather in Janesville, IA
The average temperature in Janesville in March is 36.7°F (26.9°F–46.5°F). Average precipitation: 1.98 inches. Average snowfall is 4.6 inches.
March is a spring month in Janesville, and is cooler than the annual average of 49°F. Daily temperatures swing about 19.6°F between overnight low and afternoon high. Expect about 10 days with precipitation. Daylight averages about 11h 42m. For travel, March is cool.
Avg High
46.5°F
Avg Low
26.9°F
Precipitation
1.98 in
Snow
4.6 in
March records in Janesville
| Date | Record High | Record Low | Record Precip |
|---|---|---|---|
| March 1 | 64.9°F (1992) | -34.1°F (1962) | 0.96 in (1965) |
| March 2 | 69.1°F (1964) | -14.8°F (2014) | 0.88 in (1965) |
| March 3 | 80.1°F (2024) | -18.8°F (2014) | 1.05 in (1951) |
| March 4 | 70.0°F (1983) | -11.9°F (1978) | 1.13 in (2025) |
| March 5 | 70.0°F (2000) | -15.0°F (1960) | 1.26 in (2022) |
| March 6 | 72.0°F (2000) | -11.0°F (1960) | 1.61 in (2026) |
| March 7 | 79.0°F (2000) | -18.9°F (1960) | 1.31 in (2009) |
| March 8 | 75.0°F (1977) | -9.0°F (1975) | 1.03 in (1998) |
| March 9 | 69.1°F (2021) | -11.9°F (1984) | 0.85 in (2019) |
| March 10 | 75.9°F (2025) | -9.0°F (1984) | 1.13 in (2013) |
| March 11 | 77.0°F (2024) | 1.0°F (1969) | 1.48 in (1977) |
| March 12 | 75.0°F (1990) | -6.0°F (1998) | 0.78 in (1991) |
| March 13 | 73.9°F (2007) | -11.0°F (1975) | 0.77 in (1990) |
| March 14 | 81.0°F (2025) | -9.9°F (1960) | 1.16 in (1990) |
| March 15 | 79.0°F (2012) | -4.9°F (2017) | 0.74 in (2016) |
| March 16 | 82.0°F (2012) | -8.0°F (1951) | 1.09 in (1983) |
| March 17 | 82.0°F (2012) | -0.9°F (1959) | 0.76 in (1965) |
| March 18 | 81.0°F (2012) | -2.0°F (1960) | 1.10 in (2022) |
| March 19 | 80.1°F (2012) | 1.9°F (1951) | 1.00 in (1952) |
| March 20 | 73.0°F (2012) | 1.9°F (1951) | 0.66 in (2011) |
| March 21 | 87.1°F (2026) | -5.1°F (1951) | 0.50 in (1993) |
| March 22 | 73.0°F (1988) | 8.1°F (1974) | 1.72 in (1966) |
| March 23 | 75.0°F (1963) | 0.0°F (1965) | 1.12 in (1979) |
| March 24 | 77.0°F (1963) | -5.1°F (1974) | 0.81 in (2024) |
| March 25 | 82.0°F (2007) | 3.0°F (1960) | 1.26 in (1963) |
| March 26 | 84.0°F (1991) | 3.9°F (1955) | 1.71 in (1959) |
| March 27 | 79.0°F (1989) | -5.1°F (1964) | 0.87 in (1975) |
| March 28 | 84.9°F (2025) | 3.0°F (1970) | 0.80 in (1988) |
| March 29 | 87.1°F (1986) | 3.9°F (1969) | 1.08 in (1976) |
| March 30 | 86.0°F (2026) | 1.0°F (1964) | 1.95 in (1998) |
| March 31 | 82.0°F (1986) | 9.0°F (1969) | 0.69 in (2008) |