I had business in Canberra a few months ago and I grabbed a couple spare hours to do some bird photography. I chose the bird-abundant National Botanic Gardens. But alas it was late in the day, dark and raining. But knowing how I could push my ISO into the “danger zone” and still be able to repair the damage (ie, the noise) later – I gave it a go. A couple good results proved the point: don’t let bad weather prevent your photography attempts.
The other important tip is this: even if you’re hand-holding, as long as you’re using flash, you’ll get super sharp results. And they’ll be aesthetic as well. And colourful!