diff --git a/src/CAtemperature.hpp b/src/CAtemperature.hpp
index 141abd09..678c7561 100644
--- a/src/CAtemperature.hpp
+++ b/src/CAtemperature.hpp
@@ -141,9 +141,10 @@ struct Temperature {
     // Based on the X coordinate compared to the global domain bounds and the Y coordinate compared to the MPI rank Y
     // bounds (integers), return whether or not this translated coordinate is in bounds on this rank
     bool translatedXYInBounds(const double x_translated, const double y_translated, const Grid grid) {
+        const int coord_x = Kokkos::round((x_translated - grid.x_min) / grid.deltax);
         const int coord_y_global = Kokkos::round((y_translated - grid.y_min) / grid.deltax);
         bool xy_in_bounds;
-        if ((grid.x_min <= x_translated) && (grid.x_max >= x_translated) && (coord_y_global >= grid.y_offset) &&
+        if ((coord_x >= 0) && (coord_x < grid.nx) && (coord_y_global >= grid.y_offset) &&
             (coord_y_global < grid.y_offset + grid.ny_local))
             xy_in_bounds = true;
         else
diff --git a/unit_test/tstTemperature.hpp b/unit_test/tstTemperature.hpp
index e00795ba..834fe749 100644
--- a/unit_test/tstTemperature.hpp
+++ b/unit_test/tstTemperature.hpp
@@ -328,7 +328,7 @@ void checkTemperatureResults(Inputs &inputs, Grid &grid, Temperature<MemorySpace
         const bool x_coord_mirrored = ((mirror_x) && (coord_y % 2 == 1));
         double loc_along_scan;
         if (x_coord_mirrored)
-            loc_along_scan = static_cast<double>(grid.nx - coord_x);
+            loc_along_scan = static_cast<double>((grid.nx - 1) - coord_x);
         else
             loc_along_scan = static_cast<double>(coord_x);
         const double expected_tm = loc_along_scan + static_cast<double>(coord_y) * inputs.temperature.temporal_offset;
@@ -358,35 +358,27 @@ void checkTemperatureResults(Inputs &inputs, Grid &grid, Temperature<MemorySpace
     }
 }
 
-// Test storing temperature data from Finch on the correct ExaCA ranks, optionally mirroring and translating the data
-void testInitTemperatureFromFinch(const bool mirror_x, const int number_of_copies) {
-
-    using memory_space = TEST_MEMSPACE;
-    using view_type_coupled = Kokkos::View<double **, Kokkos::LayoutLeft, Kokkos::HostSpace>;
-
-    int id, np;
-    // Get number of processes
-    MPI_Comm_size(MPI_COMM_WORLD, &np);
-    // Get individual process ID
-    MPI_Comm_rank(MPI_COMM_WORLD, &id);
-
-    // Default inputs struct - manually set temperature values for test
-    Inputs inputs;
+// Initialize test input values for InitTemperatureFromFinch and InitTemperatureFromFile
+void initTestInputs(const bool mirror_x, const int number_of_copies, Inputs &inputs) {
     inputs.temperature.x_offset = 0.0;
     inputs.temperature.y_offset = 1.0 * pow(10, -6);
     inputs.temperature.mirror_x = mirror_x;
     inputs.temperature.mirror_y = false;
     inputs.temperature.temporal_offset = 100.0;
     inputs.temperature.number_of_copies = number_of_copies;
+}
 
-    // Default grid struct - manually set up domain for test
-    Grid grid;
+// Initialize test grid for InitTemperatureFromFinch and InitTemperatureFromFile
+void initTestGrid(const int id, const int np, Grid &grid) {
     grid.deltax = 1.0 * pow(10, -6);
     grid.x_min = -2.0 * pow(10, -6);
     grid.nx = 2;
+    grid.x_max = grid.x_min + grid.deltax * (grid.nx - 1);
     grid.y_min = 0.0;
     grid.ny_local = 3;
+    grid.ny = grid.ny_local * np;
     grid.y_offset = id * grid.ny_local;
+    grid.y_max = grid.y_min + grid.deltax * (grid.ny - 1);
     grid.z_min = 0.0;
     grid.z_min_layer[0] = grid.z_min;
     grid.nz = np;
@@ -395,6 +387,26 @@ void testInitTemperatureFromFinch(const bool mirror_x, const int number_of_copie
     grid.number_of_layers = 1;
     grid.layer_height = 0;
     grid.layer_range = std::make_pair(0, grid.domain_size);
+}
+
+// Test storing temperature data from Finch on the correct ExaCA ranks, optionally mirroring and translating the data
+void testInitTemperatureFromFinch(const bool mirror_x, const int number_of_copies) {
+
+    using memory_space = TEST_MEMSPACE;
+    using view_type_coupled = Kokkos::View<double **, Kokkos::LayoutLeft, Kokkos::HostSpace>;
+
+    int id, np;
+    // Get number of processes
+    MPI_Comm_size(MPI_COMM_WORLD, &np);
+    // Get individual process ID
+    MPI_Comm_rank(MPI_COMM_WORLD, &id);
+
+    // Default inputs struct - manually set temperature values for test
+    Inputs inputs;
+    // Default grid struct - manually set up domain for test
+    Grid grid;
+    initTestInputs(mirror_x, number_of_copies, inputs);
+    initTestGrid(id, np, grid);
 
     // Create dummy Finch temperature data stored on various ranks, to be mapped to ExaCA ranks
     view_type_coupled input_temperature_data(Kokkos::ViewAllocateWithoutInitializing("FinchData"), grid.nx * np, 6);
@@ -435,29 +447,10 @@ void testInitTemperatureFromFile(const bool mirror_x, const int number_of_copies
 
     // Default inputs struct - manually set temperature values for test
     Inputs inputs;
-    inputs.temperature.x_offset = 0.0;
-    inputs.temperature.y_offset = 1.0 * pow(10, -6);
-    inputs.temperature.mirror_x = mirror_x;
-    inputs.temperature.mirror_y = false;
-    inputs.temperature.temporal_offset = 100.0;
-    inputs.temperature.number_of_copies = number_of_copies;
-
     // Default grid struct - manually set up domain for test
     Grid grid;
-    grid.deltax = 1.0 * pow(10, -6);
-    grid.x_min = -2.0 * pow(10, -6);
-    grid.nx = 2;
-    grid.y_min = 0.0;
-    grid.ny_local = 3;
-    grid.y_offset = id * grid.ny_local;
-    grid.z_min = 0.0;
-    grid.z_min_layer[0] = grid.z_min;
-    grid.nz = np;
-    grid.domain_size = grid.nx * grid.ny_local * grid.nz;
-    grid.domain_size_all_layers = grid.domain_size;
-    grid.number_of_layers = 1;
-    grid.layer_height = 0;
-    grid.layer_range = std::make_pair(0, grid.domain_size);
+    initTestInputs(mirror_x, number_of_copies, inputs);
+    initTestGrid(id, np, grid);
 
     // Create dummy file temperature data on rank 0, including data to be mapped to other ExaCA ranks
     if (id == 0) {