If, on your big day, you happen to have bad weather or overcast conditions, the natural lighting may not be appropriate enough for your photographs. Your photographer should look at either moving locations or bringing in other sources to compliment your images.
Alternatively, you might end up with a beautifully sunny day, which can cause harsh streams of light. Outside photographs will need to be flexible and have the ability to change quickly depending on the weather. In some conditions images should be taken in the shade, as direct sunshine can cause shadowing under your eyes, cloudy conditions are actually favourable. Unfortunately, you cannot organise the weather, but you should ensure that you have looked at a portfolio of your photographer’s work, ensuring they take beautiful photos regardless of the weather or lighting.
Some venues have to rely on artificial lighting due to their shape and architecture. The lighting already present at the venue, particularly in older buildings, can influence the colour of the light within the room. Many churches use downlights which can produce an orange glow. Your photographer may face difficulties with existing lighting, but they will do all they can to capture images which reflect your day. This is also where it is beneficial to find a photographer who has taken images in your venue before, as they will be familiar with challenges and ways to overcome them.