St. Ann Highlands, CO climate
St. Ann Highlands has chilly, snowy winters and pleasant summers, with very little rain. A typical July afternoon reaches 77°, a January night drops to 17°, and about 184 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in St. Ann Highlands feels like
Winter
Spring
Summer
Fall
St. Ann Highlands 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 | 38° | 17° | 0.7" | 15.8" | 9 | 31 | 22° – 33° |
| February | 38° | 17° | 0.9" | 28.0" | 12 | 29 | 23° – 34° |
| March | 45° | 22° | 1.7" | 29.9" | 12 | 29 | 29° – 40° |
| April | 51° | 27° | 2.8" | 34.9" | 13 | 19 | 33° – 44° |
| May | 60° | 35° | 2.7" | 17.9" | 16 | 6 | 42° – 51° |
| June | 72° | 43° | 1.9" | 0.1" | 10 | 0 | 53° – 63° |
| July | 77° | 49° | 2.4" | 0 | 15 | 0 | 60° – 68° |
| August | 75° | 47° | 2.2" | 0 | 14 | 0 | 57° – 65° |
| September | 68° | 41° | 1.7" | 0.7" | 10 | 1 | 49° – 58° |
| October | 57° | 31° | 1.3" | 18.1" | 10 | 8 | 37° – 49° |
| November | 45° | 23° | 1.0" | 13.5" | 8 | 19 | 26° – 42° |
| December | 38° | 17° | 0.7" | 24.6" | 11 | 29 | 21° – 32° |
| Year | 55° | 31° | 20.0" | 183.5" | 140 | 169 |
“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 St. Ann Highlands
St. Ann Highlands gets 20 inches of rain and melted snow a year. April is the wettest month and December the driest. Rain or snow falls on about 140 days a year. Snow covers the ground about 169 days of the year.
About 120 frost-free days a year
In half of years the last 32° night comes by May 24 and the first one by September 23. That leaves about 120 frost-free days for gardens, shorter than 97% of U.S. towns.
Heating and cooling a home in St. Ann Highlands
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In St. Ann Highlands, 99% of that work is heating and 1% 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.
How St. Ann Highlands 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 St. Ann Highlands averaged 1.2° warmer than the 1900s. The biggest change is in March (+3.0°). The shift is smaller than in 54% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at St. Ann Highlands’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 26° to 42°. August is the most reliable, staying within 8°.
Common questions about St. Ann Highlands’s climate
What is the coldest month in St. Ann Highlands?
January, with a typical high of 38° and a low of 17°.
What is the hottest month in St. Ann Highlands?
July, with a typical high of 77° and a low of 49°. About 3 days a year reach 90°.
How much snow does St. Ann Highlands get?
About 184 inches in a normal winter, most of it in April.
When is the first frost in St. Ann Highlands?
In half of years the first 32° night comes by September 23, and the last spring frost by May 24.
What is the rainiest month in St. Ann Highlands?
April, with 2.8 inches of rain and melted snow. The year totals 20 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for St. Ann Highlands itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Ward 4.6 Ne, CO (9 mi, snow) and Gross Rsvr, CO (7 mi, frost, heat and degree days). Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.