What is the average last frost date and the first fall killing frost in the Hayward area?
Minong Wi is the closest station from the National Climate Data Center where this information is tabulated.
- Cold Hardiness Zone 3b– Average annual minimal temperature is -35 to-30 degrees; 4a -30 to-25 degrees
- AHS Heat Zones 3-4 – average number of days each year above 86 degrees is zone 3 (7-14 days) and zone 4 (14-30) Why is that important – because plants stop growing above 86°
- Average Last Spring Frost – was May 24 to 30; now May 21 when we have a 50% chance of being above or below that temperature
- Average First Fall Frost –was September 13-19; now Sept 26 – again a 50% change of being above or below that date.
Minong Wi is the closest station from the National Climate Data Center where this information is tabulated.
