The weather at Agate Fossil Beds changes with the season. Summer can be very hot with highs in the upper 90's, sometimes 100 degrees or more. In the winter the temperatures can plummet to -10 or below. Winds can make it feel colder and dry you out in winter or summer. During the summer thunderstorms can build in the afternoon and some become violent. In the winter, you could experience blizzard conditions.
All that said, there is nothing more beautiful than a pleasant late spring day with the sun is warm and the breeze is refreshing or walking in a snow of huge quiet flakes.