First create the following helpers in 'Settings - Devices & Services - Helpers'

• input_number.day_temp_max
  
• input_datetime.day_temp_max_time
  
• input_number.day_temp_min
  
• input_datetime.day_temp_min_time
  
• input_number.day_wind_max
  
• input_number.highest_daily_recorded_rainfall
  
• input_number.highest_weekly_recorded_rainfall
  
• input_datetime.highest_weekly_rainfall_date
  
• input_number.highest_monthly_recorded_rainfall
  
• input_datetime.highest_monthly_rainfall_date
  
• input_number.highest_recorded_remp
  
• input_datetime.highest_temp_date
  
• input_number.lowest_recorded_temp
  
• input_datetime.lowest_temp_date
  
• input_number.highest_recorded_wind_speed
  
• input_datetime.highest_wind_speed_date
  
• input_number.last_month_rain
  
• input_number.rain_yesterday
  
  Then create the automations using the automation files provided.
  Make sure to change any sensor entity (in my case gw1100a_v2_2_3_###) to use the name of your entity.