diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3b394e4fa..9bbb0f234 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -32,6 +32,7 @@ Attention: The newest changes should be on top -->
 
 ### Added
 
+- EHN: Addition of ensemble variable to ECMWF dictionaries [#842] (https://github.com/RocketPy-Team/RocketPy/pull/842) 
 - ENH: Added Crop and Clip Methods to Function Class [#817](https://github.com/RocketPy-Team/RocketPy/pull/817)
 - DOC: Add Flight class usage documentation and update index [#841](https://github.com/RocketPy-Team/RocketPy/pull/841)
 - ENH: Discretized and No-Pickle Encoding Options [#827] (https://github.com/RocketPy-Team/RocketPy/pull/827)
diff --git a/rocketpy/environment/weather_model_mapping.py b/rocketpy/environment/weather_model_mapping.py
index 59c6e2fd9..c8596d705 100644
--- a/rocketpy/environment/weather_model_mapping.py
+++ b/rocketpy/environment/weather_model_mapping.py
@@ -32,6 +32,7 @@ class WeatherModelMapping:
         "latitude": "latitude",
         "longitude": "longitude",
         "level": "level",
+        "ensemble": "number",
         "temperature": "t",
         "surface_geopotential_height": None,
         "geopotential_height": None,
@@ -44,6 +45,7 @@ class WeatherModelMapping:
         "latitude": "latitude",
         "longitude": "longitude",
         "level": "pressure_level",
+        "ensemble": "number",
         "temperature": "t",
         "surface_geopotential_height": None,
         "geopotential_height": None,