Historical weather data, all-time temperature records, and monthly climate averages for Castlewood, CO. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5 in Castlewood sits right in that classic Colorado transition zone — expect a high around 57° and a low that can still bite at 32°. The date has swung wildly over the years, from a balmy 75° in 1959 down to a teeth-chattering 17° in 1964. Snow is unlikely but not impossible, with just a 6% chance of flurries.
Castlewood's weather has serious range — 134 degrees separates its all-time high of 102° (July 11, 1954) from its all-time low of -32° (January 12, 1963). Even spring isn't safe from extremes: the snowiest single day on record dumped 15.8 inches on April 2, 1957, just three days before today's date.
Castlewood heats up fast through spring, climbing from a 42° average high in January to 70° by May and peaking around 86-87° in mid-July. If you're chasing sunshine and warmth, July and August are your window. Wet weather peaks in mid-May, so late spring visits should come with a rain layer.