Why does it appear brighter outside after a snowstorm?

The reason it appears brighter after a snowstorm is because fresh snow flakes/crystals reflect more light (natural and artificial) than other ground coverages such as grass, dirt, or blacktop.

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High Low
Current 46°F 38°F
Average 41°F 22°F
Record 63°F February 19, 1997 0°F February 19, 1936