Glen Allen Forecast Wednesday, January 17, 2018 06:41 AM Glen Allen has light snow that is occurring, very chilly temperatures and a gentle breeze from the north-northeast. Glen Allen is warmer by 5.8°F than yesterday at 6:29 AM. Glen Allen's precipitation for today so far is 0.01 inches. Glen Allen's precipitation for Jan. is now 1.20 inches. WEDNESDAY: Snow likely in the morning tapering in the afternoon. 1-3 inches of snow in the Glen Allen area with the highest amounts up to 4-6 inches south and southwest VA with highs in the low 30s.