>>3229986Watch cloud movement, look to the horizon in that direction, understand the local weather patterns (you should if you live where you're shooting).
Pay attention to the weather all the time and you'll get better at it. Run the Weather Channel on TV in the background while you use your computer.
I love weather and feel I've become pretty good at predicting it for the above reasons. Just yesterday I told some friends we were going to have an amazing sunset even though it was raining and 4pm. They wouldn't believe me. Sure enough, the rain moved away and was between the setting sun and us, resulting in those crazy golden rainy sunsets.
Considering photography is all about light and weather has a massive impact over light, it's pretty crazy that most photographers who shoot outdoors don't learn more about weather. Even roughly knowing the water temp of nearby lakes and the ambient air temp + dew point can accurately tell you if fog will form.