diff --git a/maui/src/Charts/Series/BoxAndWhiskerSeries.cs b/maui/src/Charts/Series/BoxAndWhiskerSeries.cs
index de7c059..afcb25a 100644
--- a/maui/src/Charts/Series/BoxAndWhiskerSeries.cs
+++ b/maui/src/Charts/Series/BoxAndWhiskerSeries.cs
@@ -1034,7 +1034,7 @@ internal override void GenerateSegments(SeriesView seriesView)
 
 			for (int i = 0; i < PointsCount; i++)
 			{
-				var yList = YDataCollection[i].Where(x => !double.IsNaN(x)).ToArray();
+				var yList = FilterNaNValues(YDataCollection[i]);
 
 				List<double> outliers = [];
 
@@ -1042,7 +1042,13 @@ internal override void GenerateSegments(SeriesView seriesView)
 				{
 					// The quartile, whisker, and min/max calculations below all rely on ascending values.
 					Array.Sort(yList);
-					average = yList.Average();
+					double sum = 0;
+					for (int j = 0; j < yList.Length; j++)
+					{
+						sum += yList[j];
+					}
+
+					average = sum / yList.Length;
 				}
 
 				int yCount = yList.Length;
@@ -1489,6 +1495,33 @@ static void GetMinMaxandOutlier(double lowerQuartile, double upperQuartile, doub
 			}
 		}
 
+		/// <summary>
+		/// Filters out NaN values from the source list without LINQ allocations.
+		/// </summary>
+		static double[] FilterNaNValues(IList<double> source)
+		{
+			int count = 0;
+			for (int i = 0; i < source.Count; i++)
+			{
+				if (!double.IsNaN(source[i]))
+				{
+					count++;
+				}
+			}
+
+			var result = new double[count];
+			int index = 0;
+			for (int i = 0; i < source.Count; i++)
+			{
+				if (!double.IsNaN(source[i]))
+				{
+					result[index++] = source[i];
+				}
+			}
+
+			return result;
+		}
+
 		void GetQuartileValues(double[] yList, int len, out double lowerQuartile, out double upperQuartile)
 		{
 			double[] lowerQuartileArray;