diff --git a/witbierbot.py b/witbierbot.py
index cc281ec..5356d66 100755
--- a/witbierbot.py
+++ b/witbierbot.py
@@ -7,6 +7,7 @@ import datetime
 import json
 import os
 import sys
+from collections import defaultdict
 from urllib.request import urlopen
 
 
@@ -20,13 +21,24 @@ def load_weather():
     return json.load(result)
 
 
+def get_maxima(weather):
+    days = defaultdict(float)
+    for day in weather['list']:
+        instant = datetime.datetime.fromtimestamp(day['dt'])
+        date = instant.date()
+        days[date] = max(days[date], day['main']['temp_max'])
+
+    return days
+
+
 def main():
     if len(sys.argv) > 1:
         with open(sys.argv[1]) as f:
             weather = json.load(f)
     else:
         weather = load_weather()
-    print(weather)
+
+    print(get_maxima(weather))
 
 
 if __name__ == '__main__':