Only 23.2 overs were possible, but in that time, the visitors had taken the match by the scruff of the neck thanks to the veteran fast bowler Dillon du Preez (3-8), with only the elements preventing them from pushing on following a good start.
After winning the toss and electing to bowl first, the Free Staters had reduced their KwaZulu-Natal counterparts to 45 for five in the day when a heavy downpour forced the players from the field for a second time just after midday.
There was a brief 20-minute delay inside the opening hour of the game after a short shower.
Even at that break the Dolphins had reached a woeful 14 for three.
They lost their first wicket in the sixth over when Cameron Delport edged Du Preez to wicketkeeper Rudi Second for seven.
Home captain Morne van Wyk followed three balls later as he sliced Quinton Friend (1-6) straight down the throat of Du Preez at third man for one.
Cody Chetty (two) was trapped leg before wicket by Du Preez with a delivery that kept slightly low, leaving the total on 14 for three just as some drizzle fell.
After brief delay, the veteran 34-year-old Knights seamer took out Khaya Zondo for a duck, an edge flying to Second, while Vaugh van Jaarsveld, the top-scorer with 22, edged one from Shadley van Schalkwyk to Michael Erlank at second slip to leave the total on 39 for five.
The rain arrived not long after and they never returned giving each side two points each - the Dolphins temporarily climbing second and the Knights staying fifth.