Shimatta!! so why "michi" instead of "machi"?!!!
The other posters wrote "michi" because your original sentence was "There is rain in the
street."
If you mean streets in general, "machi" can be used, because it points to the city/town in general, including its streets.
The sentence with "machi":
* Machi wa ame desu. (It is raining in the city/streets.)
* Machi wa ame de nurete imasu. (The city/streets are wet with rain.)
Koko ni aruite kimashita? I came (by) walking if a person didn't ask me? deshou?
To say I came here (on foot):
Koko made aruite kimashita. OR Koko e aruite kimashita.
"Made" means "up to (a certain location, point in time, etc.)" and points to the place you are heading or have arrived.
"E" (written with the hiragana "he") has the same meaning, but more the destination or the goal.
ano hi, aruite imashita (One day I was walking...)
About your thread title, "ano hi" means "that" day or a special day that you have in mind.
If you want to say "one day" to mean any day, you have to use: "Aru hi"
If you want to say "one day in the past," you have to use phrases like "konomae" (the other day) or "senjitsu" (one day in the recent past). You can also be specific by saying "kinou" (yesterday), "senshu" (last week), etc.