Dear Leah,

did you try the NASA Climatology Resource for Agroclimatology?
[log in to unmask]" target="_blank">http:[log in to unmask]

Once you have the daily data, calculating wet days should not be a problem.

As for long-term relative humidity data, this is (even) more difficult to come by.
You may want to have a look at the MTCLIM software from University of Montana (author: William M. Jolly) - very nice tool indeed!

For "changing" climate, the usual weather generators should be able to do this.


Regards,
Rolf



> -----Original Message-----
> From: DSSAT - Crop Models and Applications [mailto:[log in to unmask]]
> On Behalf Of Leah Mungai
> Sent: Monday, March 19, 2012 01:43
> To: [log in to unmask]
> Subject: Climate Dataset for Sub Sahara Africa request
>
> Dear DSSAT Community,
>
> I am a graduate student, using DSSAT 4.5 to simulate the impact of climate
> change on Maize yield in Sub Sahara Africa. I am looking for mean monthly
> long term climate data for Sub Sahara Africa as input to weatherman.
> So far, I found
> http://iridl.ldeo.columbia.edu/SOURCES/.NOAA/.NCDC/.GHCN/ site where I can
> get monthly weather station temp and precipitation. After checking this
> dataset I need complete dataset with humidity, solar radiation, wet days
> etc.
>
> Please help me complete source where I can get this climate dataset for
> Sub Sahara Africa. Also, I am wondering which is the best way to pertub
> input climate data for scenarios.
>
> Thank you and I hope to hear from you soon.
>
> Leah