Dungeon Master Environmental Effects

In creating the narrative and story with your adventures, do you consider or use environmental effects in the game?
Snow, cold, rain, or heat?
If the players are outside and it begins to rain really hard do you reflect this in your game?
Does it ever rain in your games?
What about following a group of goblins into a misty forest?
How do you represent the “mist” in game turns?
Beyond describing it for my players, I like to use dice modifiers to remind them and keep it tactical in their mind- nobody forgets what is going on when there are dice modifiers.
Heavy rain: movement is reduced by 10 feet.

Heavy fog: -2 to hit.

Moving up a hill: -1 when rolling for combat.
See you in the game!