diff --git a/env-sample b/env-sample
index 81252ce220cc64f61200c285dc545b8dc5494328..792be08f5bb3b78bcbb92aba94f01b80b2a82a19 100644
--- a/env-sample
+++ b/env-sample
@@ -15,6 +15,8 @@ FILENAME_DATEFORMAT="met_1_0km_nordic-%Y-%m-%d.nc"
 RR="RR"
 # Relative humidity (2m)
 UM="UM"
+# Mean temperature (2m)
+TM="TM"
 # Timezone for weather data/daily aggregations
 LOCAL_TIMEZONE="Europe/Oslo"
 # Path to optional CSV file with polygons for masking result.