[Q] How to generate daily weather data?


Can someone tell me how to generate daily weather data from an historical daily meteorological data using DSSAT (WeatherMan)?


In order to generate daily weather data you require climate data as input. WeatherMan has the capability to create the climate data if you import at least 5 to 10 years of daily weather data. Once you have created the climate data file with WeatherMan there is a separate option to generate daily weather data and then to export the files.In DSSAT you need to select externally generated weather data in the simulation controls in order for the model to find the data.

About Gerrit Hoogenboom

Professor, University of Florida

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  1. Amir
    April 17, 2014 at 11:18 am #

    Hi all

    where can I download the weatherman for win 64 bit?


    • Jawoo Koo
      April 20, 2014 at 9:24 am #

      WeatherMan should work fine for the 64-bit Windows. Note that the WeatherMan is part of DSSAT (you can request to download DSSAT from http://dssat.net/downloads. Let us know if you find any error message.

  2. Name (required)
    January 16, 2015 at 4:37 pm #

    I’ve imported six years of daily weather data into Weatherman which includes radiation, max and min temperature, precipitation, and windrun. I am able to correct missing values for all parameters lest windrun. Does anyone know how to correct missing windrun data?

    Thanks in advance,

    Mike B.

  3. Name (required)
    October 25, 2016 at 1:59 pm #

    For a growing season of canola (around 5 months); is that okay if I choose 4 weeks (before and after)as weather records data to perform “What-if” analyses??? or Do I need more???


    • Gerrit Hoogenboom
      March 3, 2017 at 8:25 am #

      Very good question. It depends somewhat on your “what-if” analysis. If you are planning to change planting dates, you need to make sure that you have sufficient data to cover your planting date range for your analysis. If you are planning to change your variety, a longer season variety could require more weather data.

  4. Maria
    March 3, 2017 at 4:06 am #


    Once I have generated daily weather data with the weatherMa tool, How can I create different weather scenarios?

    • Gerrit Hoogenboom
      March 3, 2017 at 9:03 am #

      The weather generator in WeatherMan can only generate different sequences of daily weather data. Once you have generated them within WeatherMan, you need to export the generated weather data similar to exporting observed data. Select File, Save Station and then the Generated Data Tab.

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