Monument, Colorado climate: Normal weather by month, frost dates and records
Monument's normal year runs from 14°F February nights to 84°F July afternoons, with 18.1 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 8.2°C, February lows of −10°C, July highs of 29°C, 459 mm of precipitation a year.
- NOAA stationMonument (3 mi S)
- Station IDUSC00055733
- Location39.06°N 104.87°W
- Elevation6,821 ft (2,079 m)
- From the center2 miles
- Population13,408
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Monument.
- Jan 43° 14°
- Feb 43° 14°
- Mar 52° 23°
- Apr 57° 29°
- May 67° 38°
- Jun 79° 47°
- Jul 84° 53°
- Aug 81° 51°
- Sep 75° 44°
- Oct 63° 32°
- Nov 52° 22°
- Dec 43° 15°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like in Monument each month?
July is the warmest month, with normal highs of 84°F; February the coldest, with normal lows of 14°F. The most precipitation falls in August (3.11 in), the least in December (0.47 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 43°F | 14°F | 28.9°F | 0.52 | – | <1 | 31 | 9 h 40 min |
| February | 43°F | 14°F | 28.8°F | 0.58 | – | <1 | 26 | 10 h 40 min |
| March | 52°F | 23°F | 37.2°F | 1.33 | – | <1 | 27 | 11 h 50 min |
| April | 57°F | 29°F | 42.9°F | 2.10 | – | <1 | 20 | 13 h 10 min |
| May | 67°F | 38°F | 52.4°F | 2.26 | – | <1 | 8 | 14 h 20 min |
| June | 79°F | 47°F | 62.9°F | 1.76 | – | 4 | <1 | 14 h 50 min |
| July | 84°F | 53°F | 68.4°F | 2.69 | – | 7 | <1 | 14 h 40 min |
| August | 81°F | 51°F | 66.2°F | 3.11 | – | 3 | <1 | 13 h 40 min |
| September | 75°F | 44°F | 59.6°F | 1.70 | – | 1 | 1 | 12 h 30 min |
| October | 63°F | 32°F | 47.4°F | 0.87 | – | <1 | 16 | 11 h 10 min |
| November | 52°F | 22°F | 37.0°F | 0.69 | – | <1 | 24 | 10 h |
| December | 43°F | 15°F | 28.9°F | 0.47 | – | <1 | 30 | 9 h 30 min |
| Year (annual) | 62°F | 32°F | 46.7°F | 18.08 | – | 15 | 183 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 6°C | −10°C | −1.7°C | 13 mm |
| February | 6°C | −10°C | −1.8°C | 15 mm |
| March | 11°C | −5°C | 2.9°C | 34 mm |
| April | 14°C | −2°C | 6.1°C | 53 mm |
| May | 19°C | 3°C | 11.3°C | 57 mm |
| June | 26°C | 8°C | 17.2°C | 45 mm |
| July | 29°C | 12°C | 20.2°C | 68 mm |
| August | 27°C | 11°C | 19.0°C | 79 mm |
| September | 24°C | 7°C | 15.3°C | 43 mm |
| October | 17°C | 0°C | 8.6°C | 22 mm |
| November | 11°C | −5°C | 2.8°C | 18 mm |
| December | 6°C | −10°C | −1.7°C | 12 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. Monument's own co-op station Monument station does: 121 inches of snow in a normal year (see the other stations below).
Source: NOAA NCEI 1991-2020 monthly normals, station USC00055733; annual normals. Wet days: 0.01 inch or more; 90°F days and freezing nights: NOAA's day counts. Daylight: sunrise to sunset on the 15th, computed from the latitude.
When is the best weather to visit Monument?
Normal highs sit between 65°F and 85°F in May, June, July, August and September.
That is a measurement, not a recommendation: it counts the months whose normal afternoon high sits between 65°F and 85°F, where a light layer is enough by day.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00055733.
When is the last frost in Monument?
In Monument, the last spring frost (32°F) comes after May 17 in half of years and after May 30 in one year in ten; the first autumn frost comes before October 1 in half of years and before September 19 in one year in ten.
Frost-free in half of yearsFrost in 1 to 9 years out of 10Frost most years
- Last spring frost, half of years after
- May 171 year in 10 after May 30; 9 in 10 after May 5
- First autumn frost, half of years before
- October 11 year in 10 before September 19; 9 in 10 before October 12
NOAA puts the median frost-free season at 136 days, and the season without a hard freeze (28°F) at 154 days.
A hard freeze (28°F) comes after May 6 in half of springs and before October 9 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Monument in zone 5b in ZIP code 80132.
Frost dates for every NOAA station in Colorado · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00055733; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026. A 10% date means one year in ten has a frost after it in spring or before it in autumn.
How hot and how cold does it get in Monument?
In a normal year in Monument, 15 days a year reach 90°F and 183 nights fall to 32°F or colder.
- Days at 90°F or more
- 15a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 183a normal year
- Days that stay below freezing
- 26high of 32°F or less
Source: NOAA NCEI 1991-2020 annual normals, station USC00055733.
How sunny is Monument?
Over a year 80% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Monument, 4.8 kWh per square metre a day. September is the sunniest month (85%) and May the cloudiest (76%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 79% | 2.6 |
| February | 78% | 3.5 |
| March | 78% | 4.7 |
| April | 76% | 5.8 |
| May | 76% | 6.5 |
| June | 82% | 7.2 |
| July | 83% | 7.0 |
| August | 84% | 6.3 |
| September | 85% | 5.4 |
| October | 82% | 4.0 |
| November | 81% | 2.9 |
| December | 79% | 2.3 |
Source: NASA POWER solar climatology, 2001-2020 (CERES SYN1deg). Satellite-based, for the 1-degree cell (about 100 km across) around the station, so it describes the area rather than the airport.
How much heating and cooling does Monument need?
A normal year in Monument brings 6,924 heating degree days, 29% more than the median U.S. place (5,373), and 283 cooling degree days, 69% fewer than the median (908). Eight months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 2,075 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,121 | 0 |
| February | 1,013 | 0 |
| March | 864 | 0 |
| April | 663 | 0 |
| May | 396 | 5 |
| June | 111 | 46 |
| July | 17 | 122 |
| August | 43 | 80 |
| September | 189 | 27 |
| October | 547 | 1 |
| November | 842 | 0 |
| December | 1,119 | 0 |
| Year (annual) | 6,924 | 283 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00055733. A degree day is one degree of a day's mean temperature below 65°F (heating) or above it (cooling); utilities use them to estimate energy use.
How does Monument's climate compare?
Monument is warmer than 49 of the other 124 places with their own NOAA record in Colorado, and wetter than 94. Across the 7,247 U.S. stations with normals, its annual mean of 46.7°F is warmer than 26%.
In the Köppen classification computed from these normals, Monument is Dfb: continental, no dry season, warm summer. What the classes mean.
Places with the most similar year elsewhere
Measured month by month on the normal high, low and precipitation, among places of 20,000 or more people in other states:
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers. Similarity: the root-mean-square difference of the 36 monthly figures, precipitation weighted so an inch counts like 6°F.
Which places near Monument share this climate record?
3 places have no NOAA station with 1991-2020 normals of their own, and this station is the nearest full record. A place's own climate can differ from these figures, by several degrees where it sits much higher or lower than the station, nearer the coast, or inside a large city's heat; for the larger places the next nearest records are named with their yearly mean, so the spread around them is visible, and places of 50,000 or more have their own page with NOAA's gridded normals.
- Woodmoor, CO8,819 people · 4 mi N
- Palmer Lake, CO2,575 people · 5 mi NW
- Larkspur, CO223 people · 12 mi N
Source: Census Bureau 2024 Gazetteer (place centers) and Vintage 2024 population estimates. Distance and direction from the station to each place's center.
What do Monument's other NOAA stations record?
One more NOAA station keeps 1991-2020 normals in or near Monument. This page uses Monument (3 mi S); the other differs by site and elevation:
| Station | From the center | Elevation | Year | Jan low | Jul high | Precip. | Snow | Last frost |
|---|---|---|---|---|---|---|---|---|
| Monument station USC00055734 | 2 mi NW | 7,080 ft | 46.5°F | 16°F | 83°F | 22.5 | 121 | May 14 |
Source: NOAA NCEI 1991-2020 normals for each station. Last frost: the median last spring date of 32°F.
Questions about Monument's climate
What is the coldest month in Monument?
February, with a normal high of 43°F and a normal low of 14°F. The warmest is July (84°F by day, 53°F at night).
Does it snow in Monument?
Yes. NOAA publishes no 1991-2020 snowfall normal for Monument's NOAA station; Monument's own co-op station Monument station records 121 inches of snow in a normal year.
What is the rainiest month in Monument?
August, with 3.11 in of precipitation in a normal year; the driest is December with 0.47 in.
What plant hardiness zone is Monument in?
The USDA's 2023 map puts Monument in zone 5b in ZIP code 80132.
How late can frost come in Monument?
In half of years the last 32°F night comes after May 17; in one year in ten it comes after May 30. Waiting until May 30 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Colorado climateThe statewide normals and every place in the state
- Black Forest, CO4 miles from this station, 49.2°F a year
- Cumbre Vista - Colorado Springs 1, CO11 miles from this station, 47.0°F a year
- Eastonville (2 mi NNW), CO15 miles from this station, 43.9°F a year
- Ruxton Park, CO16 miles from this station, 41.5°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made