Ralston Rsvr, CO Climate

Climate Insight: Ralston Rsvr, CO

The NOAA 1991–2020 climate normals describe Ralston Rsvr, Colorado as a location with an annual average temperature of 52°F, ranging from a mean daily high of 64°F to a mean daily low of 39°F. July is typically the warmest month of the year, while December is the coldest. These thirty-year averages, computed from station USC00056816, smooth out year-to-year variability and give a baseline expectation for typical conditions in any given month.

Rainfall (and snow, where it falls) shapes day-to-day life here as much as temperature does. Ralston Rsvr sees about 18.7 inches of precipitation a year, with 62.5 inches typically falling as snow. The frost-free season averages 164 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near May 3 and the first fall freeze near October 14. On the energy side, 5,642 heating degree days and 751 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.

On PlainClimate's composite comfort index, Ralston Rsvr scores 44/100 (Moderate), a blended measure that weighs temperature mildness, precipitation moderation, and extreme-weather frequency against one another. Use the monthly tables above to plan around specific windows, shoulder seasons for mild highs and lows, peak summer for July-driven heat, or deep winter for December-driven cold. All figures here are thirty-year averages: any single year may run warmer, wetter, drier, or cooler than the normal, so treat them as planning guidance rather than forecasts.