diff --git a/src/app/weather/[id]/page.tsx b/src/app/weather/[id]/page.tsx
index 554ce4c..7af13bb 100644
--- a/src/app/weather/[id]/page.tsx
+++ b/src/app/weather/[id]/page.tsx
@@ -2,7 +2,7 @@ import { notFound } from 'next/navigation';
 import Link from 'next/link';
 import { auth } from '@/lib/auth';
 import { getWorkshop, getSessionsTabUrl } from '@/lib/workshops';
-import { getWeatherSessionById } from '@/services/weather';
+import { getWeatherSessionById, getPreviousWeatherEntriesForUsers } from '@/services/weather';
 import { getUserTeams } from '@/services/teams';
 import { WeatherBoard, WeatherLiveWrapper, WeatherInfoPanel, WeatherAverageBar } from '@/components/weather';
 import { Badge } from '@/components/ui';
@@ -20,15 +20,22 @@ export default async function WeatherSessionPage({ params }: WeatherSessionPageP
     return null;
   }
 
-  const [session, userTeams] = await Promise.all([
-    getWeatherSessionById(id, authSession.user.id),
-    getUserTeams(authSession.user.id),
-  ]);
+  const session = await getWeatherSessionById(id, authSession.user.id);
 
   if (!session) {
     notFound();
   }
 
+  const allUserIds = [
+    session.user.id,
+    ...session.shares.map((s: { userId: string }) => s.userId),
+  ];
+
+  const [previousEntries, userTeams] = await Promise.all([
+    getPreviousWeatherEntriesForUsers(session.id, session.date, allUserIds),
+    getUserTeams(authSession.user.id),
+  ]);
+
   return (
     <main className="mx-auto max-w-7xl px-4 py-8">
       {/* Header */}
@@ -99,6 +106,7 @@ export default async function WeatherSessionPage({ params }: WeatherSessionPageP
             email: session.user.email ?? '',
           }}
           canEdit={session.canEdit}
+          previousEntries={previousEntries}
         />
       </WeatherLiveWrapper>
     </main>
diff --git a/src/components/weather/WeatherBoard.tsx b/src/components/weather/WeatherBoard.tsx
index acab0ce..9cae558 100644
--- a/src/components/weather/WeatherBoard.tsx
+++ b/src/components/weather/WeatherBoard.tsx
@@ -28,6 +28,13 @@ interface Share {
   };
 }
 
+type PreviousEntry = {
+  performanceEmoji: string | null;
+  moralEmoji: string | null;
+  fluxEmoji: string | null;
+  valueCreationEmoji: string | null;
+};
+
 interface WeatherBoardProps {
   sessionId: string;
   currentUserId: string;
@@ -44,6 +51,7 @@ interface WeatherBoardProps {
     email: string;
   };
   canEdit: boolean;
+  previousEntries: Map<string, PreviousEntry>;
 }
 
 export function WeatherBoard({
@@ -53,6 +61,7 @@ export function WeatherBoard({
   shares,
   owner,
   canEdit,
+  previousEntries,
 }: WeatherBoardProps) {
   // Get all users who have access: owner + shared users
   const allUsers = useMemo(() => {
@@ -137,6 +146,7 @@ export function WeatherBoard({
               currentUserId={currentUserId}
               entry={entry}
               canEdit={canEdit}
+              previousEntry={previousEntries.get(entry.userId) ?? null}
             />
           ))}
         </tbody>
diff --git a/src/components/weather/WeatherCard.tsx b/src/components/weather/WeatherCard.tsx
index 20a38ff..134d86d 100644
--- a/src/components/weather/WeatherCard.tsx
+++ b/src/components/weather/WeatherCard.tsx
@@ -22,14 +22,22 @@ interface WeatherEntry {
   };
 }
 
+type PreviousEntry = {
+  performanceEmoji: string | null;
+  moralEmoji: string | null;
+  fluxEmoji: string | null;
+  valueCreationEmoji: string | null;
+};
+
 interface WeatherCardProps {
   sessionId: string;
   currentUserId: string;
   entry: WeatherEntry;
   canEdit: boolean;
+  previousEntry?: PreviousEntry | null;
 }
 
-export function WeatherCard({ sessionId, currentUserId, entry, canEdit }: WeatherCardProps) {
+export function WeatherCard({ sessionId, currentUserId, entry, canEdit, previousEntry }: WeatherCardProps) {
   const [isPending, startTransition] = useTransition();
   const [notes, setNotes] = useState(entry.notes || '');
   const [performanceEmoji, setPerformanceEmoji] = useState(entry.performanceEmoji || null);
@@ -104,6 +112,9 @@ export function WeatherCard({ sessionId, currentUserId, entry, canEdit }: Weathe
   // For now, we'll use a placeholder - in real app, you'd pass user info as prop
   const user = entry.user;
 
+  // previousEntry is available for future use in Task 6
+  void previousEntry;
+
   return (
     <tr className={`border-b border-border ${isPending ? 'opacity-50' : ''}`}>
       {/* User column */}