The Study of Frost Occurrence in Free State Province of South Africa

Table 4

Onset of frost at different probability levels (20%, 50%, and 80%) and thresholds (2°C, 0°C, and −2°C).

Station	20%			50%			80%
	2°C	0°C	−2°C	2°C	0°C	−2°C	2°C	0°C	−2°C
Bethlehem	15-Apr	27-Apr	07-May	25-Apr	06-May	17-May	03-May	15-May	28-May
Bloemfontein	12-Apr	22-Apr	03-May	22-Apr	01-May	17-May	02-May	09-May	30-May
Bothaville	20-Apr	04-May	18-May	04-May	17-May	02-Jun	17-May	30-May	18-Jun
Fauresmith	11-Apr	26-Apr	16-May	25-Apr	10-May	01-Jun	10-May	23-May	19-Jun
Ficksburg	13-Apr	26-Apr	17-May	25-Apr	07-May	29-May	07-May	19-May	10-Jun
Frankfort	11-Apr	22-Apr	01-May	22-Apr	01-May	12-May	30-Apr	09-May	23-May
Virginia	23-Apr	11-May	21-May	03-May	21-May	06-Jun	14-May	31-May	21-Jun
Wepener	09-Apr	20-Apr	01-May	18-Apr	01-May	14-May	28-Apr	12-May	27-May
Zastron	08-Apr	19-Apr	01-May	18-Apr	30-Apr	14-May	28-Apr	11-May	27-May