I go for a bike ride for myto exercise every day except rainy dayfor days that it rains.

I used to go after lunch, but I've changed the time for it.switched to going around 5 PM because it's been getting really hot during the daytime.

Would combine the 2 sentences!

Now I go around five pm because it's been getting really hot during day time.

I've also changed the route I've been taking, because the path I used to go through has been bushy.

The gGrass has been growing and covering the path.

I thought I might come across snakes or other creepy bugs, which is why I changed the route.

Just combining the sentences here again :) not wrong just sounds more natural

That's why I changed the route.

The sun is still up in the sky even around five pm, so I wear arm caovers to avoid getting suntanned.

However, I think I'll probably still get sun tantanned even if I do, but it's okay because getting a little bit of sun tanned is good to stay healthy.

I go for a bike ridebicycle around for my exercise every day, except rainy daywhen it rains.

Me too!

I used to go after lunch, but I've changed sometimes other time for its.

Now I tend to go around five p.m .because it's been getting really hot during day timemidday.

I've also changed the route because the path I used to go through has been bushyo a shady route to avoid the sunlight.

ThSome grass has been growing and is covering theat path.

The sun is still up in the sky even around five pm, so I wear arm cavers to avoid getting a suntan.

I've also changed the route because the path I used to go through has been bushy (or has become/gotten bushy).

I thought I might come across snakes or other creepy bugs.

The sun is still up in the sky even around five pm, so I wear arm caovers to avoid getting suntan (or sunburn).

However, I think I'll still get sun tan, but it's okay because getting a little bit of sun tan is good to stay healthy.

I go for a bike ride for (my) exercise every day except on rainy days.

You can omit "my" here and I think it sounds better.

I used to go after lunch, but I've changed the time for it.

Now I go around five pm because it's been getting really hot during day time.

We usually only use "pm" when combining it with numeric numbers (e.g. 5pm). If you spell it out as "five", normally people write e.g. "five in the evening" if they need to specify which 5.

I've also changed the route because the path I used to go through has becomen bushy.

The grass has been growing and is now covering the path.

"has been growing" is a statement about the activities of the grass so far (like 咲いていた）while covering is a statement about what it's doing now (like 覆っている）which means you need to bring back in the "is now".

The sun is still up in the sky even around five pm, so I wear arm caovers to avoid getting a suntan.

I go for a bike ride for myas exercise every day except on rainy days.

I used to go after lunch, but I've changed the time for itI go.

I would say "I used to go after lunch, but now I go later. I go around 5pm now because it's been getting really hot during the day."

Now I go around five pm because it's been getting really hot during the day time.

I've also changed themy route because the path I used to go through has becomen bushy.

I think "my route" sounds more natural than just "the route"

The grass has been growing and (now) coverings the path.

I thought I might come across snakes or other creepy bugs.

It may be more natural to say "I was worried I might come across snakes or other creepy bugs"

That's why I changed themy route.

The sun is still up in the sky even around five pm, so I wear arm caovers to avoid getting a suntan.

However, I think I'll still get a sun tan, but it's okay because getting a little bit of a sun tan is a good way to stay healthy.

"Sun tan" is ok, but I think it's more common to use "suntan" (as one word). Using "however" and "but" in the same sentence here sounds odd, so I removed the "however", as I don't think you need that word here.

I go for a bike ride for myas exercise every day except rainy dayones.

Can replace 'days' with 'ones' which refers backs to the earler 'day'.

I used to go after lunch, but I've changed the time for itI go.

Now I go around five pm because it's been getting really hot during day timethe day.

I've also changed the route because the path I used to go through has been bushycome overgrown.

The grass has been growingn and coveringed the path.

The sun is still up in the sky even around five pm, so I wear arm caovers to avoid getting a suntan.

However, I think I'll still get a sun tan, but it's okay because getting a little bit of a sun tan is good tofor staying healthy.