This might be a good product.
Weatherbreaker panels are sturdy, matching cream-coloured vinyl screens that attach easily onto your awning. When you want to block the sun and breeze, or prevent light rain from blowing under your awning, simply attach a Weatherbreaker panel and secure it to your deck or railing. You’ll still have plenty of light and ventilation, but the Weatherbreaker helps keep out 60% of the sun, wind and drizzle, so you don’t have to worry about napkins blowing off your table or mist from a passing shower blowing under the canopy. The awning must be fully extended to use Weatherbreaker panels.