It is a haiku, isn't it? Beautiful...
I hadn't meant it to be, but I'll take the credit! Usually haiku are 5, 7, 5 syllables. Thanks for commenting :-)
Because Haiku has been brought into English, there is now some flexibility in it, since comparing English language syllables and words with Japanese characters is a little imprecise. The main rules seem to be a pattern of syllables-yours is 4/6/4, brevity and the topic of nature. I'd say you wrote a Haiku. :-)
If a topic has special significance for you, or touches you in some way, I'd love to hear your story! I will return the favour and we will gently touch hands across the miles...or kilometres :-)