Over time the trees planted on LMAD managed property have matured and achieved significant size, as they were intended to. (PDF) establishes a criteria which mitigates tree loss, pruning for view enhancement, City of Yorba Linda Casa Loma Avenue Yorba Linda, CA Phone Number: Sep 26, Oak trees are best trimmed in the winter between November and March.
Oak trees are dormant in winter and are less likely to be negatively affected by pruning when in winter dormancy. That being said, branches which are dead, damaged, or diseased should be removed any time of year (and as soon as possible).Estimated Reading Time: 8 mins. Pruning oak trees in winter greatly reduces the risk of an oak wilt infection as the beetles and fungal mats are not present at that time of year.
If an oak tree must be pruned in spring or summer (such as after a storm), apply latex house paint to the pruning cuts to avoid attracting sap-feeding beetles to the wounds. Sep 22, As easy as it is to remove wood, I would take all the time needed to insure the best results.
Your asking the question is indicative that your are already doing this. To sum up my answer, late october would be a good time to prune.