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Message: <blockquote data-quote="Umbran" data-source="post: 7862204" data-attributes="member: 177">Broadly speaking, yes.  Seasons are variations of climate, not the originators of climate.  Sunlight will still be nearly horizontal at the pole, so it'll be cooler, and sunlight comes straight down at the equator, so it'll still be warmer.  The details - exactly how cold it is at the poles, how warm at the equator, and how wet or dry various areas are, will depend on the local details - positioning of seas and mountains and such.  But you've basically just said that the North and South hemispheres experience their seasons at the same time, instead of alternating.Now, there may be some oddities of atmospheric dynamics we are missing, and that the seasonal temperature variation pole to pole may drive some heat and atmospheric flow the leads to some weather patterns we think of as common.  I'd need a simulation to be able to tell that.Edit: Doing some quick reading, I'm finding a suggestion that axial tilt tends to moderate temperature, overall.  So, if you lack tilt, you get much more variance with latitude - the equator is hotter, and the poles are colder as a result.  In an extreme case, you can have gases boiling off at the equator, and freezing down at the poles, leading to collapse of an atmosphere.This last I'd take with a grain of salt - we used to think similar things about tidally-locked worlds, until we got better models of atmospheric flow, which showed that atmospheric flow could moderate temperatures more than expected.  I wouldn't be surprised if the general point still held - without at least 5 degree tilt providing variation, places tend to bake and freeze.</blockquote>

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