Through the warm months at Flag Lake highs are typically in the 90's. When the night sets in temperatures drop down into the 60's. Throughout the winter highs are in the 50's with temperatures at Flag Lake dipping down into the 30's during winter nights. The high level of rain makes Flag Lake a relatively wet location. The month with most of the rain is March, and October on the other hand is the driest.
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These outdoors activities are available near Flag Lake.