diff --git a/src/main/angular/src/app/core/api.service.ts b/src/main/angular/src/app/core/api.service.ts
index 49ff931..b6d864a 100644
--- a/src/main/angular/src/app/core/api.service.ts
+++ b/src/main/angular/src/app/core/api.service.ts
@@ -4,7 +4,7 @@ import {map, Subscription} from 'rxjs';
 import {StompService} from '@stomp/ng2-stompjs';
 import {FromJson, Next} from './types';
 
-const DEV_TO_PROD = true;
+const DEV_TO_PROD = false;
 
 @Injectable({
   providedIn: 'root'
diff --git a/src/main/angular/src/app/value/Value.ts b/src/main/angular/src/app/value/Value.ts
index c3f1bc6..7b54892 100644
--- a/src/main/angular/src/app/value/Value.ts
+++ b/src/main/angular/src/app/value/Value.ts
@@ -53,18 +53,44 @@ export class Value {
     return new Value(-this.value, this.unit, this.decimals, this.locale);
   }
 
-  plus(other: Value | undefined): Value | undefined {
-    if (!other) {
-      return undefined;
-    }
-    return new Value(this.value + other.value, this.unit, this.decimals, this.locale);
+  plus(other: Value | number | undefined | null): Value | undefined {
+    const v = this.extractValue(other);
+    return v === undefined ? undefined : new Value(this.value + v, this.unit, this.decimals, this.locale);
   }
 
-  minus(other: Value | undefined): Value | undefined {
-    if (!other) {
+  minus(other: Value | number | undefined | null): Value | undefined {
+    const v = this.extractValue(other);
+    return v === undefined ? undefined : new Value(this.value - v, this.unit, this.decimals, this.locale);
+  }
+
+  gte(other: Value | number | undefined | null): boolean | undefined {
+    const v = this.extractValue(other);
+    return v === undefined ? undefined : this.value >= v;
+  }
+
+  gt(other: Value | number | undefined | null): boolean | undefined {
+    const v = this.extractValue(other);
+    return v === undefined ? undefined : this.value > v;
+  }
+
+  lte(other: Value | number | undefined | null): boolean | undefined {
+    const v = this.extractValue(other);
+    return v === undefined ? undefined : this.value <= v;
+  }
+
+  lt(other: Value | number | undefined | null): boolean | undefined {
+    const v = this.extractValue(other);
+    return v === undefined ? undefined : this.value < v;
+  }
+
+  extractValue(other: Value | number | undefined | null): number | undefined {
+    if (other === undefined || other === null) {
       return undefined;
     }
-    return new Value(this.value - other.value, this.unit, this.decimals, this.locale);
+    if (other instanceof Value && other.unit !== this.unit) {
+      throw new Error(`Unit mismatch: this=${JSON.stringify(this)}, other=${JSON.stringify(other)}`);
+    }
+    return typeof other === "number" ? other : other.value;
   }
 
   notNegative(): Value {
diff --git a/src/main/angular/src/app/weather/weather-diagram/WeatherHour.ts b/src/main/angular/src/app/weather/weather-diagram/WeatherHour.ts
index 874a12f..488f897 100644
--- a/src/main/angular/src/app/weather/weather-diagram/WeatherHour.ts
+++ b/src/main/angular/src/app/weather/weather-diagram/WeatherHour.ts
@@ -8,6 +8,7 @@ export class WeatherHour {
     readonly clouds: Value,
     readonly irradiation: Value,
     readonly precipitation: Value,
+    readonly temperature: Value,
   ) {
     //
   }
@@ -18,6 +19,7 @@ export class WeatherHour {
       Value.fromJson2(json['clouds'], locale),
       Value.fromJson2(json['irradiation'], locale),
       Value.fromJson2(json['precipitation'], locale),
+      Value.fromJson2(json['temperature'], locale),
     );
   }
 
diff --git a/src/main/angular/src/app/weather/weather-diagram/weather-diagram.component.html b/src/main/angular/src/app/weather/weather-diagram/weather-diagram.component.html
index 40ccb9a..832ab27 100644
--- a/src/main/angular/src/app/weather/weather-diagram/weather-diagram.component.html
+++ b/src/main/angular/src/app/weather/weather-diagram/weather-diagram.component.html
@@ -4,9 +4,22 @@
   </div>
   <div class="day">
     <div class="hour" *ngFor="let hour of hours">
+      <div class="bar weekdayHolder" *ngIf="hour.date.getHours() === 8">
+        {{ dateFormat(hour.date | date:'E') }}
+      </div>
       <div class="bar clouds" [style.height]="clouds(hour)"></div>
-      <div class="bar precipitation" [style.height]="precipitation(hour)"></div>
       <div class="bar irradiation" [style.height]="irradiation(hour)"></div>
+      <div class="bar precipitation" [style.height]="precipitation(hour)"></div>
+      <div class="bar temperature" [style.height]="temperature(hour)" [ngClass]="temperatureClasses(hour)"></div>
     </div>
   </div>
+  <div class="legend">
+    <span class="line temperatureGTE30">&ge;30°C</span>
+    <span class="line temperatureGTE20">&ge;20°C</span>
+    <span class="line temperatureGTE10">&ge;10°C</span>
+    <span class="line temperatureGT0">&gt;0°C</span>
+    <span class="line temperatureNegative">&le;0°C</span>
+    <span class="line">&nbsp;</span>
+    <span class="line">Niederschlag 100% = {{ PRECIPITATION_MAX_MM }}mm</span>
+  </div>
 </div>
diff --git a/src/main/angular/src/app/weather/weather-diagram/weather-diagram.component.less b/src/main/angular/src/app/weather/weather-diagram/weather-diagram.component.less
index a18ee55..e491a85 100644
--- a/src/main/angular/src/app/weather/weather-diagram/weather-diagram.component.less
+++ b/src/main/angular/src/app/weather/weather-diagram/weather-diagram.component.less
@@ -8,6 +8,7 @@
     display: flex;
     align-items: flex-end;
     width: 100%; // any width will do (flex cares about real with)
+    overflow: visible;
 
     .bar {
       position: absolute;
@@ -25,8 +26,73 @@
 
     .precipitation {
       background-color: blue;
+      opacity: 0.75;
+    }
+
+    .temperature {
+      border-top: 0.06em solid black;
+      opacity: 0.75;
+    }
+
+    .temperatureGTE30 {
+      border-top-color: red;
+    }
+
+    .temperatureGTE20 {
+      border-top-color: orange;
+    }
+
+    .temperatureGTE10 {
+      border-top-color: yellow;
+    }
+
+    .temperatureGT0 {
+      border-top-color: blue;
+    }
+
+    .temperatureNegative {
+      border-top-color: white;
+    }
+
+    .weekdayHolder {
+      overflow: visible;
+      opacity: 1;
+      height: 100%;
     }
 
   }
 
 }
+
+.legend {
+  display: flex;
+  width: 100%;
+  flex-direction: row;
+  justify-content: center;
+
+  .line {
+    padding: 0 0.25em;
+    font-size: 50%;
+  }
+
+  .temperatureGTE30 {
+    color: red;
+  }
+
+  .temperatureGTE20 {
+    color: orange;
+  }
+
+  .temperatureGTE10 {
+    color: yellow;
+  }
+
+  .temperatureGT0 {
+    color: blue;
+  }
+
+  .temperatureNegative {
+    color: white;
+  }
+
+}
diff --git a/src/main/angular/src/app/weather/weather-diagram/weather-diagram.component.ts b/src/main/angular/src/app/weather/weather-diagram/weather-diagram.component.ts
index fd742d0..e0dc786 100644
--- a/src/main/angular/src/app/weather/weather-diagram/weather-diagram.component.ts
+++ b/src/main/angular/src/app/weather/weather-diagram/weather-diagram.component.ts
@@ -1,5 +1,5 @@
 import {Component, OnInit} from '@angular/core';
-import {NgForOf} from '@angular/common';
+import {DatePipe, NgClass, NgForOf, NgIf} from '@angular/common';
 import {WeatherHour} from './WeatherHour';
 import {WeatherService} from './weather.service';
 import {WeatherDay} from './WeatherDay';
@@ -11,13 +11,18 @@ const DAY_COUNT = 7;
 @Component({
   selector: 'app-weather-diagram',
   imports: [
-    NgForOf
+    NgForOf,
+    NgIf,
+    DatePipe,
+    NgClass
   ],
   templateUrl: './weather-diagram.component.html',
   styleUrl: './weather-diagram.component.less'
 })
 export class WeatherDiagramComponent implements OnInit {
 
+  protected readonly PRECIPITATION_MAX_MM = 15;
+
   protected days: WeatherDay[] = [];
 
   protected hours: WeatherHour[] = [];
@@ -44,7 +49,11 @@ export class WeatherDiagramComponent implements OnInit {
   }
 
   precipitation(hour: WeatherHour) {
-    return (hour.precipitation.percent(15)?.value || 0) + '%';
+    return (hour.precipitation.percent(this.PRECIPITATION_MAX_MM)?.value || 0) + '%';
+  }
+
+  temperature(hour: WeatherHour) {
+    return (hour.temperature.plus(10)?.percent(50)?.value || 0) + '%';
   }
 
   private updateHours() {
@@ -74,4 +83,26 @@ export class WeatherDiagramComponent implements OnInit {
     }
   }
 
+  dateFormat(date: string | null) {
+    if (!date) {
+      return "";
+    }
+    return date.substring(0, 2);
+  }
+
+  temperatureClasses(hour: WeatherHour): {} {
+    const temperatureGTE30 = hour.temperature.gte(30);
+    const temperatureGTE20 = hour.temperature.gte(20);
+    const temperatureGTE10 = hour.temperature.gte(10);
+    const temperatureGT0 = hour.temperature.gt(0);
+    const temperatureNegative = hour.temperature.lte(0);
+    return {
+      "temperatureGTE30": temperatureGTE30,
+      "temperatureGTE20": temperatureGTE20 && !temperatureGTE30,
+      "temperatureGTE10": temperatureGTE10 && !temperatureGTE20,
+      "temperatureGT0": temperatureGT0 && !temperatureGTE10,
+      "temperatureNegative": temperatureNegative
+    };
+  }
+
 }
diff --git a/src/main/java/de/ph87/data/weather/WeatherDay.java b/src/main/java/de/ph87/data/weather/WeatherDay.java
index 74cf7bf..7b4653f 100644
--- a/src/main/java/de/ph87/data/weather/WeatherDay.java
+++ b/src/main/java/de/ph87/data/weather/WeatherDay.java
@@ -1,13 +1,18 @@
 package de.ph87.data.weather;
 
+import de.ph87.data.value.Unit;
 import de.ph87.data.value.Value;
-import de.ph87.data.value.*;
-import lombok.*;
+import lombok.Data;
+import lombok.NonNull;
+import lombok.ToString;
 
-import java.io.*;
-import java.time.*;
-import java.util.*;
-import java.util.stream.*;
+import java.io.IOException;
+import java.time.LocalDate;
+import java.time.LocalTime;
+import java.time.ZoneId;
+import java.time.ZonedDateTime;
+import java.util.List;
+import java.util.stream.Collectors;
 
 @Data
 @ToString(includeFieldNames = false)
@@ -67,11 +72,15 @@ public class WeatherDay {
     @NonNull
     public final Value precipitation;
 
+    @NonNull
+    public final Value temperature;
+
     public Hour(@NonNull final BrightSkyDto.Weather dto) {
       date = dto.getTimestamp();
       clouds = new Value(dto.getCloud_cover(), Unit.CLOUD_COVER_PERCENT);
       irradiation = new Value(dto.getSolar() * 1000, Unit.IRRADIATION_WH_M2);
       precipitation = new Value(dto.getPrecipitation(), Unit.PRECIPITATION_MM);
+      temperature = new Value((dto.getTemperature()), Unit.TEMPERATURE_C);
     }
 
   }