It's not a great explanation but the simple reason is "because you don't." It's one of the quirks of English as it evolved. Admittedly the seasons are no less proper nouns than--for example--the days of the week or the months in the year, however it's customary to not capitalize the initial letters.
Historically "winter" and "summer" were units of measure and so they weren't capitalized. "Spring" and "fall" were part of phrases describing the periods, and since we don't capitalize verbs those, in turn, remained void of the initial capitalization. As for "autumn," it's just an odd one.
However since we've well moved past dealing with them as units of times or parts of a phrase we come back to the regretful answer of "because you don't." English has many quirks, and this is one of them.
No, the names of seasons are not capitalized.
no
Whats the names of email sites that start with the letter n
Protestant
Yanni
Boats that start with the letter h:hydrofoilshouseboat
· Cardinal
no
No Only names of people or places etc have capital letter at start
yERR
The words that should start with a capital letter are places, names, important words in a title, and the letter at the start of a sentence.
Yes - all planets names begin with a capital letter.
not if it doesn't start a sentence.
Yes, names begin with a capital letter.
U.S. capital cities that start with the letter A:Albany, New YorkAnnapolis, MarylandAtlanta, GeorgiaAugusta, MaineAustin, Texas
Uruguay and Utah begin with a capital letter. Names such as Upton, Urban and Ulrich also begin with a capital letter.
The state of Hawaii and its capital Honolulu both start with H.
names ,words with B at the start of sentences
Boy names that start with the letter G:GabrielGaryGavinGeorgeGeraldGilbertGlennGordonGregGregoryGriffinGusGuyGirl names that start with the letter G:GabrielleGabyGaleGenevieveGeorgiaGinaGloriaGraceGretaGwendolyn