Castle Pines, CO climate
Castle Pines has chilly, snowy winters and warm summers, with very little rain. A typical July afternoon reaches 86°, a January night drops to 19°, and about 58 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Castle Pines feels like
Winter
Spring
Summer
Fall
Castle Pines weather by month
Average highs, lows, rain and snow for every month, from NOAA’s 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 45° | 19° | 0.6" | 8.0" | 4 | 12 | 23° – 37° |
| February | 46° | 20° | 0.6" | 10.7" | 5 | 9 | 27° – 40° |
| March | 54° | 27° | 1.2" | 10.7" | 5 | 5 | 35° – 47° |
| April | 59° | 33° | 2.0" | 8.3" | 6 | 4 | 41° – 51° |
| May | 68° | 42° | 2.2" | 1.1" | 8 | 1 | 48° – 59° |
| June | 80° | 51° | 1.9" | 0 | 8 | 0 | 62° – 71° |
| July | 86° | 57° | 2.5" | 0 | 8 | 0 | 68° – 75° |
| August | 84° | 56° | 2.1" | 0 | 10 | 0 | 65° – 73° |
| September | 76° | 48° | 1.3" | 0.4" | 6 | 0 | 56° – 67° |
| October | 64° | 36° | 1.0" | 2.7" | 4 | 2 | 42° – 55° |
| November | 53° | 26° | 0.7" | 6.7" | 4 | 5 | 31° – 47° |
| December | 44° | 19° | 0.6" | 8.9" | 5 | 11 | 25° – 37° |
| Year | 63° | 36° | 16.7" | 57.5" | 74 | 48 |
“Wet days” have at least 0.01" of rain or melted snow. “Snow on ground” counts days with 1" or more. The 30-year range is the coldest and warmest that month’s average temperature got between 1991 and 2020.
Rain and snow in Castle Pines
Castle Pines gets 17 inches of rain and melted snow a year. July is the wettest month and January the driest. Rain or snow falls on about 74 days a year. Snow covers the ground about 48 days of the year.
About 143 frost-free days a year
In half of years the last 32° night comes by May 9 and the first one by October 2. That leaves about 143 frost-free days for gardens, shorter than 87% of U.S. towns.
Heating and cooling a home in Castle Pines
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Castle Pines, 92% of that work is heating and 8% is cooling, so the furnace matters far more than the air conditioner.
Degree days measure how far each day’s average temperature falls below or rises above 65°, added up over a year. Source: NOAA station normals.
Castle Pines and its neighbors
Castle Pines borders 2 towns with climate data. January nights across them vary by 1.1°. Castle Rock has the coldest January nights (18°) and Castle Pines Village the hottest July afternoons (86°). Castle Pines’s January low is 19° and its July high 86°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How Castle Pines compares
Compared with every U.S. town and city on TownTapestry, each counted once.
Warmer than it used to be
The last 30 years in Castle Pines averaged 1.4° warmer than the 1900s. The biggest change is in March (+3.3°). The shift is larger than in 62% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Castle Pines’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. November swings the most: between 1991 and 2020 its average temperature ranged from 31° to 47°. July is the most reliable, staying within 8°.
Common questions about Castle Pines’s climate
What is the coldest month in Castle Pines?
January, with a typical high of 45° and a low of 19°.
What is the hottest month in Castle Pines?
July, with a typical high of 86° and a low of 57°. About 23 days a year reach 90°.
How much snow does Castle Pines get?
About 58 inches in a normal winter, most of it in February.
When is the first frost in Castle Pines?
In half of years the first 32° night comes by October 2, and the last spring frost by May 9.
What is the rainiest month in Castle Pines?
July, with 2.5 inches of rain and melted snow. The year totals 17 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Castle Pines itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Castle Rock, CO (4 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.