Statistics of model fit (°C) and temporal (tXV) and spatial (sXV) cross-validation predictions for a single model fit to the entire dataset and for models fit to regional, seasonal, or seasonal/regional subsets of the data (n = number of models).

Statistics are shown for daily predictions and for monthly averages (note: not all month/site combinations had data for the entire month and in these cases the available data were averaged for the month). RMSE = root mean squared error; MAE = mean absolute error; RMSPE = root mean squared prediction error; MAPE = mean absolute prediction error.