Lee Poulsen has been interested in when rain occurs in different countries or parts of countries. This information is useful if you are trying to grow plants in your climate that come from somewhere else. On this page he shares the graphs he has made.
Plots of rainfall data from Mediterranean climates created by Lee Poulsen. The first one is for a number of cities around the world and the second one is for cities in Italy.
http://pacificbulbsociety.org/pbswiki/files/RainfallGraphs/Medit.pdf
http://pacificbulbsociety.org/pbswiki/files/RainfallGraphs/Italy.pdf
(From Lee Poulsen:) Because of the discussion on climates, I uploaded a number of other plots I made a couple of years ago when I was investigating possible mediterranean climates. I haven't edited these, so a few details might be missing. If there are no units indicated on the vertical scale, it is most likely in mm. Most of the files are for long-term average monthly rainfall, unless the filename contains the word 'temps' in it, in which case it is probably longterm average monthly temperature.
Also, southern hemisphere locations have been shifted so that their summer is in the middle of the plot so that they can easily be compared to plots of northern hemisphere locations. If both northern and southern hemisphere locations are on the same plot, it is most likely that the southern hemisphere locations have been shifted by 6 months so that the seasons align with the northern hemisphere. Finally, you may need to pull out a better atlas to find where some of the locations exist. Or you can locate them online fairly easily using the Global Gazetteer at http://www.fallingrain.com/world/.
These are here because I had the same question Cynthia Mueller had (since I grew up in Austin Texas and still garden there in my parents' yard since my mother is who got me started in growing things and gardening).
http://pacificbulbsociety.org/pbswiki/files/RainfallGraphs/CentralTexas.pdf
http://pacificbulbsociety.org/pbswiki/files/RainfallGraphs/Medit-and-Austin.pdf
These are for the Pacific Northwest:
http://pacificbulbsociety.org/pbswiki/files/RainfallGraphs/OR.pdf
http://pacificbulbsociety.org/pbswiki/files/RainfallGraphs/WA.pdf
http://pacificbulbsociety.org/pbswiki/files/RainfallGraphs/BC.pdf
I wanted to see what was going on just to the east of California.
http://pacificbulbsociety.org/pbswiki/files/RainfallGraphs/AZ-desert.pdf
These proved very educational to me. I ended up dividing South Africa up into these different regions based merely on similar annual rainfall patterns. Some locations are found in several plots since they are on the boundary between two regions. 'medit' is the mediterranean area in the southwestern Cape. 'arid' is on the western side north of the 'medit' region. 'constant' (for nearly constant rainfall all year long) is along the bottom or southern coast to the east of the 'medit' region. 'transition' is where South Africa switches from wet-winter/dry summer (mediterranean) to the opposite dry-winter/wet-summer climate. The remaining two files are examples of the dry-winter/wet-summer climate which occurs in the remainder of the country (mostly the eastern half of South Africa).
http://pacificbulbsociety.org/pbswiki/files/RainfallGraphs/SoAfr-medit.pdf
http://pacificbulbsociety.org/pbswiki/files/RainfallGraphs/SoAfr-arid.pdf
http://pacificbulbsociety.org/pbswiki/files/RainfallGraphs/SoAfr-constant.pdf
http://pacificbulbsociety.org/pbswiki/files/RainfallGraphs/SoAfr-transition.pdf
http://pacificbulbsociety.org/pbswiki/files/RainfallGraphs/SoAfr-wetsummer-interior.pdf
http://pacificbulbsociety.org/pbswiki/files/RainfallGraphs/SoAfr-wetsummer-coastal.pdf
Then I had to do Chile which is like Baja California-California-Oregon-Washington-British Columbia, but in reverse:
http://pacificbulbsociety.org/pbswiki/files/RainfallGraphs/Chile-wet.pdf
http://pacificbulbsociety.org/pbswiki/files/RainfallGraphs/Chile-medit.pdf
http://pacificbulbsociety.org/pbswiki/files/RainfallGraphs/Chile-arid.pdf
Then there are some comparisons between the unique climate of San Francisco and analogous places in Chile. And similarly, with a place near Lisbon in Portugal which someone on one of the lists claimed was almost exactly like San Francisco:
http://pacificbulbsociety.org/pbswiki/files/RainfallGraphs/SF-vs-chile-rain.pdf
http://pacificbulbsociety.org/pbswiki/files/RainfallGraphs/SF-vs-chile-temps.pdf
http://pacificbulbsociety.org/pbswiki/files/RainfallGraphs/SF-vs-Lisbon-rain.pdf
http://pacificbulbsociety.org/pbswiki/files/RainfallGraphs/SF-vs-Lisbon-temps.pdf
Then of course, New Zealand, where they seem to be able to grow everything the mediterranean climate people can grow only better and without a mediterranean climate it seems!
http://pacificbulbsociety.org/pbswiki/files/RainfallGraphs/NZ.pdf
On one of the lists, someone suggested that in addition to the 5 commonly known mediterranean climates of California, Chile, South Africa, Southwest and South Australia (Perth and Adelaide), and all the countries around the Mediterranean Sea plus the Atlantic Ocean around the mouth of the Medit. Sea, that we could include the mid-altitude western mountain slopes in Maui and Lanai (but curiously not on the Big Island), and the rain shadow of the Olympic Peninsula in Washington state and of the adjoining southern Vancouver Island in British Columbia, and wondered if the high-altitude parts of eastern or northeastern Brazil might qualify. There really isn't enough data available on the web for me to find out. But it was curious to see a rainfall pattern shifted 3 months from the typical ones seen elsewhere where either summer or winter is the peak rainfall period and the opposite is the peak dry period.
http://pacificbulbsociety.org/pbswiki/files/RainfallGraphs/NE-Brazil-rain.pdf
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