My Olympia AST is good to around 28-30 degrees with a couple of shirts under it, and with the liner out and vents open it's tolerable to 90+ degrees. When it's 50 or above I like my Revit jacket better though, with the liner out it's good to over 100. Look at mesh jackets for temperate weather, but they're actually worse for you in hot weather.
But n00b, be warned- you won't be happy with one jacket, one pair of gloves, one helmet... one bike....
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