I don’t know where you’d live, but Planet X has very decent and very cheap aero helmets. If you order with different visors, you’d have the right visor for all weather types. https://www.planetx.co.uk/...us-time-trial-helmet
Agreed with this - I’ve got that Helmet and pretty happy with it.
Shape is very close to a Kask Bambino but costs only 1/5 of the Bambino.
PlanetX/Carnac is a UK/EU brand. The helmets are CE certified, but not CPSC in most cases. Just a note for the non-EU folks who can’t use it.