Robert O Cook Memorial Arboretum Weather Forecast
- 45
- 65
Partly Sunny
- 53
- 75
Rain Showers
- 29
- 59
Chance Rain/Snow
- 27
- 42
Partly Sunny
- 38
- 54
Partly Sunny
- 42
- 67
Chance Rain
- 28
- 54
Rain Likely
Today 13 Mar Rock
Sunny. Southeast Winds around 10 Mph.
Tonight 13 Mar Rock
Not as cool. Partly cloudy. Lows in the mid 40s. Southeast Winds 5 to 10 Mph.
Robert O Cook Memorial Arboretum Temperature Statistics
March Temperature
Janesville-Rock County (6.2 miles)
Lowest 2 March, 2025
12.2 °FAverage March
35.2 °FHighest 10 March, 2025
68 °F
Climate (2020–Present)
Janesville-Rock County (6.2 miles)
Average Low 2020–2025
40.6 °FAverage 2020–2025
48.8 °FAverage High 2020–2025
60.2 °F