提案①はカナダの天気予報によく使われてる言い方です。「混じった」を形容詞として使って
「Mixed rain and snow」に訳しましたす。
会話で例えると：
A) What's the weather forecast say?
B) They're calling for mixed rain and snow.
提案②は雪が少しだけじゃなくて、雨と同じように結構振ってる時に使います。
A) Is it snowing?
B) No, it looks like sleet. It's still too warm for snow.
Sleet is rain that is partly frozen.
--> The rain may turn into sleet or snow in northern hills.
--> Some sleet and rain showers in the south.
--> Snow and sleet continued across western and northeast areas last night.
--> Most areas will have the same mix of sunshine and scattered sleet or snow showers.
--> They are predicting cold temperatures, with the chance of sleet and maybe snow on the mountains.
例文です。
--> The rain may turn into sleet or snow in northern hills.
北の丘で雨はみぞれか雪に変化するかもしれません。
--> Some sleet and rain showers in the south.
南でみぞれと雨が降っています。
--> Snow and sleet continued across western and northeast areas last night.
昨晩、雪とみぞれが西部と北部のエリアをまたいで降り続けました。
--> Most areas will have the same mix of sunshine and scattered sleet or snow showers.
ほとんどのエリアは太陽光とまばらなみぞれまたは雪が混ざったものが降り注ぐでしょう。
--> They are predicting cold temperatures, with the chance of sleet and maybe snow on the mountains.
彼らは寒い気温を予想しており、山ではみぞれや雪が降る可能性を伴います。
The weather condition when rain falls but is mixed with ice or snowflakes is usually referred to as 'sleet.' This may be caused when snow melts as it falls.
"On the motorway to London today, driving sleet and rain made conditions horrendous."
"Sleet and hail have been falling on higher ground since early this morning."
雨のようだけれど、雪が少し混ざっているような天気を、'sleet'と言います。これは、おそらく雪が降るときに途中でとけてしまったからだと思います。
"On the motorway to London today, driving sleet and rain made conditions horrendous."
今日、ロンドンへの高速道路で、みぞれと雨の中運転するのが怖かったよ。
"Sleet and hail have been falling on higher ground since early this morning."
今朝から、みぞれとあられが標高の高いところで降っている。
When there is rain that is mixed with snow, the appropriate term to use is "Sleet". You can also explain that "the rain is mixed with snow."
For example, you can use the word "sleet"in a sentence in the following ways:
-Yesterday there was sleet, which made it difficult to drive.
-It's important to drive carefully when it is sleeting.
雪の混じった雨のことは"Sleet"といいます。また、"the rain is mixed with snow"（雨に雪が混ざっている）とも表現できます。
以下、"Sleet"を使った例文です。
例文
-Yesterday there was sleet, which made it difficult to drive.
（昨日みぞれが降っていたので、運転するのが大変だった）
-It's important to drive carefully when it is sleeting.
（みぞれが降っている時は、慎重に運転しないといけません）
Its looks like there are some snow mixed in the rain.
Wow! Snow falling and raining at the same time.
▪Its looks like there are some snow mixed in the rain.
Mixed=combined
▪Wow! Snow falling and raining at the same time.
This is indicating that you are surprised of the rain and snow mix.
▪Its looks like there are some snow mixed in the rain.
（雨の中に雪が混ざっている様です）
Mixed =組み合わせる
▪Wow! Snow falling and raining at the same time.
（わ！同時に雪と雨が同時に降っている。）
これはあなたが雨と雪が混ざっている事に対して驚いていることを表しています。
カナダ 
イギリス 
南アフリカ 
アメリカ合衆国 
