diff --git a/bom-wind/bom_wind.py b/bom-wind/bom_wind.py
index 6dc1284..d88f7e8 100644
--- a/bom-wind/bom_wind.py
+++ b/bom-wind/bom_wind.py
@@ -78,6 +78,7 @@ df = pd.DataFrame(json_data['observations']['data'])
 
 # Set local time as index
 df.index = pd.to_datetime(df['local_date_time_full'])
+df = df.sort_index()
 
 # Extract columns of interest
 df = df[cols]