The Weather bureau has more information than you could ever want. go to http://www.bom.gov.au/climate/map/clima ... a12a.shtml
and then pick any town you want to know about.
I chose something central to our route - eg Jarrahwood.
month of March - averages since 1975
Mean daily Max 27C, nine days over 30C and 1.6 days over 35C.
Mean daily Min 11.5C Lowest Min 1.3C (0.2 days - ie not very often)
Mean 9am temp 19C
Mean 3pm temp 26C
Mean rainy days 5
Mean MONTHLY rainfall 20mm (over 5 days - hardly worth a raincoat!?!)
Our Start point in Albany has their own weather bureau so extra info - March 2005 data is at
http://www.bom.gov.au/climate/dwo/20050 ... 0503.shtml
Min temp Mean 17.2 (range 12-20)
Max temp Mean 23.6 (range 17-32)
9am temp Mean 20.1 (range 12-24)
3pm temp Mean 21.1 (range 14-28 )
n.b. cooler 3pm temps in Albany due to regular afternoon coastal sea breeze from the south.
As our ride progresses we will be more influenced by strong afternoon seabreezes coming from the south-west, known as The Fremantle Doctor.
Happily, after Augusta/Cape Leeuwin, (when we turn north) they will be BEHIND us, providing great speed and some cooling in the afternoons. Remember this fact when riding INTO them for 7 days!
Hope this info is useful and not overwhelming, should be really nice riding weather even if a spot of rain (so long as not when I'm putting my tent up or down at the time - I HATE that!). That is, apart from all the hot air of 2,000 cyclists...