diff --git a/ncl/ncl_entries/dewtemp.ipynb b/ncl/ncl_entries/dewtemp.ipynb
new file mode 100644
index 00000000..3f3dc98c
--- /dev/null
+++ b/ncl/ncl_entries/dewtemp.ipynb
@@ -0,0 +1,101 @@
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# dewtemp_trh"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Overview\n",
+    "NCL's [`dewtemp_trh`](https://www.ncl.ucar.edu/Document/Functions/Built-in/dewtemp_trh.shtml) calculates the dew point temperature given temperature and relative humidity using the equations from John Dutton's _\"Ceaseless Wind\"_ (pg. 273-274){footcite}`dutton_1986` and returns a temperature in Kelvin.\n",
+    "\n",
+    "<div class=\"admonition alert alert-info\">\n",
+    "    <p class=\"admonition-title\" style=\"font-weight:bold\">Important Note</p>\n",
+    "    To convert from Kelvin to Celsius <code>-273.15</code> and to convert from Celsius to Kelvin <code>+273.15</code>\n",
+    "</div>"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Grab and Go"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# Input: Single Value\n",
+    "from geocat.comp import dewtemp\n",
+    "\n",
+    "temp_c = 18  # Celsius\n",
+    "relative_humidity = 46.5  # %\n",
+    "\n",
+    "dewtemp(temp_c + 273.15, relative_humidity) - 273.15  # Returns in Celsius"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# Input: List/Array\n",
+    "from geocat.comp import dewtemp\n",
+    "\n",
+    "temp_kelvin = [291.15, 274.14, 360.3, 314]  # Kelvin\n",
+    "relative_humidity = [46.5, 5, 96.5, 1]  # %\n",
+    "\n",
+    "dewtemp(temp_kelvin, relative_humidity) - 273.15  # Returns in Celsius"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "---"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Python Resources\n",
+    "- [GeoCAT-comp Documentation](https://geocat-comp.readthedocs.io/en/latest/user_api/generated/geocat.comp.meteorology.dewtemp.html)\n",
+    "- [Convert between different temperature scales in SciPy](https://docs.scipy.org/doc/scipy/reference/generated/scipy.constants.convert_temperature.html)\n",
+    "\n",
+    "## Additional Reading\n",
+    "- [NOAA: Dew Point vs. Humidity](https://www.weather.gov/arx/why_dewpoint_vs_humidity)"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3 (ipykernel)",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.11.8"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 4
+}
diff --git a/ncl/ncl_entries/ncl_entries.rst b/ncl/ncl_entries/ncl_entries.rst
index 0f3500b7..c3f3bc1d 100644
--- a/ncl/ncl_entries/ncl_entries.rst
+++ b/ncl/ncl_entries/ncl_entries.rst
@@ -11,6 +11,7 @@ Data Analysis
     climatology_functions.ipynb
     trigonometric_functions.ipynb
     general_applied_math.ipynb
+    dewtemp.ipynb
     specx_specxy_anal.ipynb
 
 Dates and Times
diff --git a/ncl/ncl_index/ncl-index-table.csv b/ncl/ncl_index/ncl-index-table.csv
index 16887ba6..3ae2467d 100644
--- a/ncl/ncl_index/ncl-index-table.csv
+++ b/ncl/ncl_index/ncl-index-table.csv
@@ -43,3 +43,4 @@ NCL Function,Description,Python Equivalent,Notes
 `sqrt <https://www.ncl.ucar.edu/Document/Functions/Built-in/sqrt.shtml>`__,"Computes the square root of its input","``math.sqrt()`` or ``numpy.sqrt()``",`example notebook <../ncl_entries/general_applied_math.ipynb#sqrt>`__
 `sign_matlab <https://www.ncl.ucar.edu/Document/Functions/Contributed/sign_matlab.shtml>`__,"Mimic the behavior of Matlab's sign function","``numpy.sign()``",`example notebook <../ncl_entries/general_applied_math.ipynb#sign-matlab>`__
 `round <https://www.ncl.ucar.edu/Document/Functions/Built-in/round.shtml>`__,"Rounds a float or double variable to the nearest whole number","``round()`` or ``numpy.round()``",`example notebook <../ncl_entries/general_applied_math.ipynb#decimalplaces-round>`__
+`dewtemp_trh <https://www.ncl.ucar.edu/Document/Functions/Built-in/dewtemp_trh.shtml>`__,"Calculates the dew point temperature given temperature and relative humidity","``geocat.comp.dewtemp()``",`example notebook <../ncl_entries/dewtemp.ipynb>`__
diff --git a/ncl/ncl_raw/dewtemp_trh.ncl b/ncl/ncl_raw/dewtemp_trh.ncl
new file mode 100644
index 00000000..8fa6c2e8
--- /dev/null
+++ b/ncl/ncl_raw/dewtemp_trh.ncl
@@ -0,0 +1,14 @@
+; dewtemp_trh
+; Adapted from https://www.ncl.ucar.edu/Document/Functions/Built-in/dewtemp_trh.shtml
+
+; ncl -n dewtemp_trh.ncl >> dewtemp_trh_output.txt
+
+print("Temperature (K), Relative Humidity (%), Dew Temperature (C)")
+do tk=273,374
+	do rh=1,100
+		begin
+		dewtemp = dewtemp_trh(tk,rh)-273.15
+		print (tk +","+ rh +","+ dewtemp)
+		end
+	end do
+end do
diff --git a/ncl/receipts/dewtemp_trh.ipynb b/ncl/receipts/dewtemp_trh.ipynb
new file mode 100644
index 00000000..1f47bb72
--- /dev/null
+++ b/ncl/receipts/dewtemp_trh.ipynb
@@ -0,0 +1,161 @@
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "id": "e6eddaf181eacfd3",
+   "metadata": {},
+   "source": [
+    "# dewtemp_trh"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "e6be6389ef38b00b",
+   "metadata": {},
+   "source": [
+    "```{warning} This is not meant to be a standalone notebook.\n",
+    "This notebook is part of the process we have for adding entries to the NCL Index and is not meant to be used as tutorial or example code.\n",
+    "```"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "536ffded4355d9c6",
+   "metadata": {},
+   "source": [
+    "## Functions covered\n",
+    "- [dewtemp_trh](https://www.ncl.ucar.edu/Document/Functions/Built-in/dewtemp_trh.shtml)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "4a129c971c083695",
+   "metadata": {},
+   "source": [
+    "## NCL code"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "3d70616a8934f0fb",
+   "metadata": {},
+   "source": [
+    "```{literalinclude} ../ncl_raw/dewtemp_trh.ncl\n",
+    "\n",
+    "```"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "d918dec004b6456b",
+   "metadata": {},
+   "source": [
+    "## Python Functionality"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "7af6f81c-2498-4aea-b250-579ec3fd31c8",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "#### Collect NCL values for dewtemp_trh from geocat-datafiles\n",
+    "import geocat.datafiles as gdf\n",
+    "import numpy as np\n",
+    "\n",
+    "dewtemp_data = gdf.get('applications_files/ncl_outputs/dewtemp_trh_output.txt')\n",
+    "dewtemp_data = np.loadtxt(dewtemp_data, delimiter=',', skiprows=6)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "3166c583-1290-4300-b96b-beab81cd033d",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "### Collect NCL `dewtemp` value and associated (temperature_kelvin, relative humidity) values\n",
+    "ncl_dewtemp = {}\n",
+    "tk_rh = tuple(map(tuple, dewtemp_data[::, 0:2]))\n",
+    "dewtemp_values = dewtemp_data[::, 2]\n",
+    "ncl_dewtemp = dict(zip(tk_rh, dewtemp_values))"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "39fd494c-609b-4dd0-83fd-b08d0daf6aaa",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "### Collect Temperature (Kelvin) and Relative Humidity Pairs\n",
+    "tk_rh = []\n",
+    "for tk in range(273, 374 + 1):\n",
+    "    for rh in range(1, 100 + 1):\n",
+    "        tk_rh.append((tk, rh))\n",
+    "\n",
+    "### Calculate GeoCAT-Comp `dewtemp` value and tk/rh\n",
+    "from geocat.comp import dewtemp\n",
+    "\n",
+    "geocat_dewtemp = {}\n",
+    "\n",
+    "for i, pair in enumerate(tk_rh):\n",
+    "    tk, rh = pair\n",
+    "    geocat_dewtemp[pair] = dewtemp(tk, rh) - 273.15"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "3237a0bffc6827fc",
+   "metadata": {},
+   "source": [
+    "## Comparison"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "74362fd9-0e9f-4cf9-91da-08cd81be625c",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "import math\n",
+    "\n",
+    "for pair in ncl_dewtemp.keys():\n",
+    "    try:\n",
+    "        assert math.isclose(\n",
+    "            ncl_dewtemp[pair], geocat_dewtemp[pair], rel_tol=1e-04\n",
+    "        )  # within 4 decimal points\n",
+    "    except Exception:\n",
+    "        assert math.isclose(\n",
+    "            ncl_dewtemp[pair], geocat_dewtemp[pair], rel_tol=1e-02\n",
+    "        )  # within 2 decimal points\n",
+    "        print(f\"{pair}:\")\n",
+    "        print(f\"\\t{ncl_dewtemp[pair]}, {geocat_dewtemp[pair]}\")\n",
+    "        print(f\"\\tDifference: {ncl_dewtemp[pair] - geocat_dewtemp[pair]}\")"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3 (ipykernel)",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.11.8"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 5
+}
diff --git a/references.bib b/references.bib
index 864bdba1..eae8df66 100644
--- a/references.bib
+++ b/references.bib
@@ -107,3 +107,11 @@ @book{monteith_2008
 	year = {2008},
 	publisher = {Academic Press}
 }
+
+@book{dutton_1986,
+	author = {John A. Dutton},
+	title = {The Ceaseless Wind: An Introduction to the Theory of Atmospheric Motion},
+	year = {1986},
+	pages={273-274},
+	publisher = {Dover Publications}
+}