Thanks for this great question. The probabilities apply to the entire season. So there's a 73% chance that, when winter is over in Florida, the season's total rainfall will be above average. You're right to think that there will be periods within the seaon that will have more rain, and periods that will have less, but our forecast is for the seaonal average. The same goes for temperature - while it's not possible to forecast exactly what days or weeks in the season will be warmer or cooler than normal, the forecast makes a prediction for the average over the whole three months.