diff --git a/fhem/FHEM/59_Wunderground.pm b/fhem/FHEM/59_Wunderground.pm
index 8aabac9ad..55f7d2ba1 100644
--- a/fhem/FHEM/59_Wunderground.pm
+++ b/fhem/FHEM/59_Wunderground.pm
@@ -58,18 +58,22 @@ sub Wunderground_Initialize($) {
       . $readingFnAttributes;
 
     $hash->{readingsDesc} = {
-        'UV'                     => { rtype => 'uvi' },
-        'dewpoint'               => { rtype => 'c' },
-        'dewpoint_f'             => { rtype => 'f' },
-        'fc0_high_c'             => { rtype => 'c', format => '%i' },
-        'fc0_high_f'             => { rtype => 'f', format => '%i' },
-        'fc0_humidity'           => { rtype => 'pct', formula_symbol => 'H' },
-        'fc0_humidity_max'       => { rtype => 'pct', formula_symbol => 'H' },
-        'fc0_humidity_min'       => { rtype => 'pct', formula_symbol => 'H' },
-        'fc0_icon_url'           => { rtype => 'url_http' },
-        'fc0_icon_url_night'     => { rtype => 'url_http' },
-        'fc0_low_c'              => { rtype => 'c', format => '%i' },
-        'fc0_low_f'              => { rtype => 'f', format => '%i' },
+        'UV'         => { rtype => 'uvi' },
+        'dewpoint'   => { rtype => 'c', formula_symbol => 'Td', },
+        'dewpoint_f' => { rtype => 'f', formula_symbol => 'Td', },
+        'fc0_high_c' =>
+          { rtype => 'c', format => '%i', formula_symbol => 'Th', },
+        'fc0_high_f' =>
+          { rtype => 'f', format => '%i', formula_symbol => 'Th', },
+        'fc0_humidity'       => { rtype => 'pct', formula_symbol => 'H' },
+        'fc0_humidity_max'   => { rtype => 'pct', formula_symbol => 'H' },
+        'fc0_humidity_min'   => { rtype => 'pct', formula_symbol => 'H' },
+        'fc0_icon_url'       => { rtype => 'url_http' },
+        'fc0_icon_url_night' => { rtype => 'url_http' },
+        'fc0_low_c' =>
+          { rtype => 'c', format => '%i', formula_symbol => 'Tl', },
+        'fc0_low_f' =>
+          { rtype => 'f', format => '%i', formula_symbol => 'Tl', },
         'fc0_rain_day'           => { rtype => 'mm' },
         'fc0_rain_day_in'        => { rtype => 'in' },
         'fc0_rain_night'         => { rtype => 'mm' },
@@ -86,15 +90,19 @@ sub Wunderground_Initialize($) {
         'fc0_wind_speed_max'     => { rtype => 'kmh', formula_symbol => 'Ws' },
         'fc0_wind_speed_max_mph' => { rtype => 'mph', formula_symbol => 'Ws' },
         'fc0_wind_speed_mph'     => { rtype => 'mph', formula_symbol => 'Ws' },
-        'fc1_high_c'             => { rtype => 'c', format => '%i' },
-        'fc1_high_f'             => { rtype => 'f', format => '%i' },
-        'fc1_humidity'           => { rtype => 'pct', formula_symbol => 'H' },
-        'fc1_humidity_max'       => { rtype => 'pct', formula_symbol => 'H' },
-        'fc1_humidity_min'       => { rtype => 'pct', formula_symbol => 'H' },
-        'fc1_icon_url'           => { rtype => 'url_http' },
-        'fc1_icon_url_night'     => { rtype => 'url_http' },
-        'fc1_low_c'              => { rtype => 'c', format => '%i' },
-        'fc1_low_f'              => { rtype => 'f', format => '%i' },
+        'fc1_high_c' =>
+          { rtype => 'c', format => '%i', formula_symbol => 'Th', },
+        'fc1_high_f' =>
+          { rtype => 'f', format => '%i', formula_symbol => 'Th', },
+        'fc1_humidity'       => { rtype => 'pct', formula_symbol => 'H' },
+        'fc1_humidity_max'   => { rtype => 'pct', formula_symbol => 'H' },
+        'fc1_humidity_min'   => { rtype => 'pct', formula_symbol => 'H' },
+        'fc1_icon_url'       => { rtype => 'url_http' },
+        'fc1_icon_url_night' => { rtype => 'url_http' },
+        'fc1_low_c' =>
+          { rtype => 'c', format => '%i', formula_symbol => 'Tl', },
+        'fc1_low_f' =>
+          { rtype => 'f', format => '%i', formula_symbol => 'Tl', },
         'fc1_rain_day'           => { rtype => 'mm' },
         'fc1_rain_day_in'        => { rtype => 'in' },
         'fc1_rain_night'         => { rtype => 'mm' },
@@ -111,24 +119,28 @@ sub Wunderground_Initialize($) {
         'fc1_wind_speed_max'     => { rtype => 'kmh', formula_symbol => 'Ws' },
         'fc1_wind_speed_max_mph' => { rtype => 'mph', formula_symbol => 'Ws' },
         'fc1_wind_speed_mph'     => { rtype => 'mph', formula_symbol => 'Ws' },
-        'fc2_high_c'             => { rtype => 'c', format => '%i' },
-        'fc2_high_f'             => { rtype => 'f', format => '%i' },
-        'fc2_humidity'           => { rtype => 'pct', formula_symbol => 'H' },
-        'fc2_humidity_max'       => { rtype => 'pct', formula_symbol => 'H' },
-        'fc2_humidity_min'       => { rtype => 'pct', formula_symbol => 'H' },
-        'fc2_icon_url'           => { rtype => 'url_http' },
-        'fc2_icon_url_night'     => { rtype => 'url_http' },
-        'fc2_low_c'              => { rtype => 'c', format => '%i' },
-        'fc2_low_f'              => { rtype => 'f', format => '%i' },
-        'fc2_rain_day'           => { rtype => 'mm' },
-        'fc2_rain_day_in'        => { rtype => 'in' },
-        'fc2_rain_night'         => { rtype => 'mm' },
-        'fc2_rain_night_in'      => { rtype => 'in' },
-        'fc2_snow_day'           => { rtype => 'cm' },
-        'fc2_snow_day_in'        => { rtype => 'in' },
-        'fc2_snow_night'         => { rtype => 'cm' },
-        'fc2_snow_night_in'      => { rtype => 'in' },
-        'fc2_title'              => { rtype => 'weekday', showLong => 1 },
+        'fc2_high_c' =>
+          { rtype => 'c', format => '%i', formula_symbol => 'Th', },
+        'fc2_high_f' =>
+          { rtype => 'f', format => '%i', formula_symbol => 'Th', },
+        'fc2_humidity'       => { rtype => 'pct', formula_symbol => 'H' },
+        'fc2_humidity_max'   => { rtype => 'pct', formula_symbol => 'H' },
+        'fc2_humidity_min'   => { rtype => 'pct', formula_symbol => 'H' },
+        'fc2_icon_url'       => { rtype => 'url_http' },
+        'fc2_icon_url_night' => { rtype => 'url_http' },
+        'fc2_low_c' =>
+          { rtype => 'c', format => '%i', formula_symbol => 'Tl', },
+        'fc2_low_f' =>
+          { rtype => 'f', format => '%i', formula_symbol => 'Tl', },
+        'fc2_rain_day'       => { rtype => 'mm' },
+        'fc2_rain_day_in'    => { rtype => 'in' },
+        'fc2_rain_night'     => { rtype => 'mm' },
+        'fc2_rain_night_in'  => { rtype => 'in' },
+        'fc2_snow_day'       => { rtype => 'cm' },
+        'fc2_snow_day_in'    => { rtype => 'in' },
+        'fc2_snow_night'     => { rtype => 'cm' },
+        'fc2_snow_night_in'  => { rtype => 'in' },
+        'fc2_title'          => { rtype => 'weekday', showLong => 1 },
         'fc2_title_night'    => { rtype => 'weekday_night', showLong => 1, },
         'fc2_wind_direction' => { rtype => 'gon' },
         'fc2_wind_direction_max' => { rtype => 'gon' },
@@ -136,15 +148,19 @@ sub Wunderground_Initialize($) {
         'fc2_wind_speed_max'     => { rtype => 'kmh', formula_symbol => 'Ws' },
         'fc2_wind_speed_max_mph' => { rtype => 'mph', formula_symbol => 'Ws' },
         'fc2_wind_speed_mph'     => { rtype => 'mph', formula_symbol => 'Ws' },
-        'fc3_high_c'             => { rtype => 'c', format => '%i' },
-        'fc3_high_f'             => { rtype => 'f', format => '%i' },
-        'fc3_humidity'           => { rtype => 'pct', formula_symbol => 'H' },
-        'fc3_humidity_max'       => { rtype => 'pct', formula_symbol => 'H' },
-        'fc3_humidity_min'       => { rtype => 'pct', formula_symbol => 'H' },
-        'fc3_icon_url'           => { rtype => 'url_http' },
-        'fc3_icon_url_night'     => { rtype => 'url_http' },
-        'fc3_low_c'              => { rtype => 'c', format => '%i' },
-        'fc3_low_f'              => { rtype => 'f', format => '%i' },
+        'fc3_high_c' =>
+          { rtype => 'c', format => '%i', formula_symbol => 'Th', },
+        'fc3_high_f' =>
+          { rtype => 'f', format => '%i', formula_symbol => 'Th', },
+        'fc3_humidity'       => { rtype => 'pct', formula_symbol => 'H' },
+        'fc3_humidity_max'   => { rtype => 'pct', formula_symbol => 'H' },
+        'fc3_humidity_min'   => { rtype => 'pct', formula_symbol => 'H' },
+        'fc3_icon_url'       => { rtype => 'url_http' },
+        'fc3_icon_url_night' => { rtype => 'url_http' },
+        'fc3_low_c' =>
+          { rtype => 'c', format => '%i', formula_symbol => 'Tl', },
+        'fc3_low_f' =>
+          { rtype => 'f', format => '%i', formula_symbol => 'Tl', },
         'fc3_rain_day'           => { rtype => 'mm' },
         'fc3_rain_day_in'        => { rtype => 'in' },
         'fc3_rain_night'         => { rtype => 'mm' },
@@ -161,8 +177,8 @@ sub Wunderground_Initialize($) {
         'fc3_wind_speed_max'     => { rtype => 'kmh', formula_symbol => 'Ws' },
         'fc3_wind_speed_max_mph' => { rtype => 'mph', formula_symbol => 'Ws' },
         'fc3_wind_speed_mph'     => { rtype => 'mph', formula_symbol => 'Ws' },
-        'feelslike_c'            => { rtype => 'c' },
-        'feelslike_f'            => { rtype => 'f' },
+        'feelslike_c'            => { rtype => 'c', formula_symbol => 'Tf', },
+        'feelslike_f'            => { rtype => 'f', formula_symbol => 'Tf', },
         'forecast_url'           => { rtype => 'url_http' },
         'history_url'            => { rtype => 'url_http' },
         'humidity'               => { rtype => 'pct', formula_symbol => 'H' },
@@ -184,9 +200,14 @@ sub Wunderground_Initialize($) {
         'sunset'                 => { rtype => 'time' },
         'temp_c'                 => { rtype => 'c' },
         'temp_f'                 => { rtype => 'f' },
-        'visibility' => { rtype => 'km', scope => { empty_replace => '-.-' } },
-        'visibility_mi' =>
-          { rtype => 'mi', scope => { empty_replace => '-.-' } },
+        'visibility' => {
+            rtype => 'km',
+            scope => { empty_replace => '-.-' }
+        },
+        'visibility_mi' => {
+            rtype => 'mi',
+            scope => { empty_replace => '-.-' }
+        },
         'wind_chill' => {
             rtype          => 'c',
             formula_symbol => 'Wc',