Weather- It’s Effects,Protection & Results Etc

[Calypso56]

1. A hot hairstyle (8)

2. Needed for flowers in next month (5.7)

3. Provides information but no trains (7.7)

4. Sign of not long wet not long dry (8.3)

5. Cynical note evolves into air movement (11)

6. It's easy. It's a ?????? (6)

I would appreciate any help with these 6 questions as my brain seems to have stopped working at the moment 

[Buenchico]

3 weather station

[Buenchico]

2. April showers ?

[Sam1960]

6. breeze

[Calibax]

4 Slippery Road?

[Calibax]

5 Anticyclone

[Canary42]

5 anti-cyclone

[mallyh]

1 heatwave

[mallyh]

6 breeze

[Sam1960]

4. mackerel sky  ??

[Sam1960]

^

yes

https://www.naturalnavigator.com/news/2017/01/mackerel-sky/#:~:text=A%20mackerel%20sky%20can%20be,long%20wet%2C%20never%20long%20dry.

[Calypso56]

Thank you all for answers but still need answer to

4. Sign of not long wet not long dry (8.3). as I answer given was a letter too many and not sure the other answer given is correct. I also need the answer to                                                         
7. Pea souper (6.3) I know the last part is fog but everything else I come up with is only 5 letters .

Thank you in advance for any help.

[Captain2]

7 London Fog?

[mallyh]

7 London fog?

[mallyh]

sams answer looks good

[elliemay1]

No.4 has been answered for you, mackerel sky