Cimarron, Colorado climate: Climate normals at a NOAA weather station
Cimarron's normal year runs from 3°F January nights to 86°F July afternoons, with 14.3 inches of precipitation and 67 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 6.1°C, January lows of −16°C, July highs of 30°C, 363 mm of precipitation a year.
- NOAA stationCimarron
- Station IDUSC00051609
- Location38.44°N 107.56°W
- Elevation6,890 ft (2,100 m)
On October 23, the normal high in Cimarron is 61°F and the normal low 24°F, and the chance of measurable rain or snow is 21%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Cimarron.
- Jan 35° 3°
- Feb 40° 10°
- Mar 51° 19°
- Apr 60° 26°
- May 70° 32°
- Jun 81° 38°
- Jul 86° 45°
- Aug 83° 45°
- Sep 76° 37°
- Oct 64° 26°
- Nov 49° 16°
- Dec 36° 6°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like at Cimarron each month?
July is the warmest month, with normal highs of 86°F; January the coldest, with normal lows of 3°F. The most precipitation falls in September (1.82 in), the least in June (0.68 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 35°F | 3°F | 18.8°F | 1.09 | 14.5 | 7 | <1 | 31 | 9 h 50 min |
| February | 40°F | 10°F | 24.7°F | 0.94 | 11.6 | 7 | <1 | 28 | 10 h 40 min |
| March | 51°F | 19°F | 34.8°F | 0.91 | 8.2 | 6 | <1 | 30 | 11 h 50 min |
| April | 60°F | 26°F | 43.0°F | 1.22 | 5.7 | 7 | <1 | 25 | 13 h 10 min |
| May | 70°F | 32°F | 51.1°F | 1.28 | 1.1 | 6 | <1 | 19 | 14 h 10 min |
| June | 81°F | 38°F | 59.2°F | 0.68 | 0.0 | 4 | 2 | 7 | 14 h 50 min |
| July | 86°F | 45°F | 65.4°F | 1.37 | 0.0 | 6 | 6 | <1 | 14 h 40 min |
| August | 83°F | 45°F | 63.8°F | 1.41 | 0.0 | 8 | 2 | 1 | 13 h 40 min |
| September | 76°F | 37°F | 56.4°F | 1.82 | 0.0 | 7 | <1 | 12 | 12 h 30 min |
| October | 64°F | 26°F | 45.0°F | 1.35 | 1.4 | 7 | <1 | 25 | 11 h 20 min |
| November | 49°F | 16°F | 32.5°F | 1.04 | 9.7 | 7 | <1 | 28 | 10 h 10 min |
| December | 36°F | 6°F | 21.0°F | 1.17 | 14.5 | 7 | <1 | 31 | 9 h 30 min |
| Year (annual) | 61°F | 25°F | 43.0°F | 14.28 | 66.7 | 80 | 10 | 235 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 2°C | −16°C | −7.3°C | 28 mm | 37 cm |
| February | 4°C | −12°C | −4.1°C | 24 mm | 29 cm |
| March | 11°C | −7°C | 1.6°C | 23 mm | 21 cm |
| April | 16°C | −3°C | 6.1°C | 31 mm | 14 cm |
| May | 21°C | 0°C | 10.6°C | 33 mm | 3 cm |
| June | 27°C | 3°C | 15.1°C | 17 mm | 0 cm |
| July | 30°C | 7°C | 18.6°C | 35 mm | 0 cm |
| August | 28°C | 7°C | 17.7°C | 36 mm | 0 cm |
| September | 25°C | 3°C | 13.6°C | 46 mm | 0 cm |
| October | 18°C | −4°C | 7.2°C | 34 mm | 4 cm |
| November | 9°C | −9°C | 0.3°C | 26 mm | 25 cm |
| December | 2°C | −14°C | −6.1°C | 30 mm | 37 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00051609; 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.
Which months are mildest at Cimarron?
Normal highs sit between 65°F and 85°F in May, June, August and September. Of those, June has the fewest days with rain (4).
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 USC00051609.
When is the last frost at Cimarron?
In Cimarron, the last spring frost (32°F) comes after June 20 in half of years and after July 7 in one year in ten; the first autumn frost comes before September 10 in half of years and before August 23 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
- June 201 year in 10 after July 7; 9 in 10 after June 4
- First autumn frost, half of years before
- September 101 year in 10 before August 23; 9 in 10 before September 23
NOAA puts the median frost-free season at 81 days, and the season without a hard freeze (28°F) at 110 days.
A hard freeze (28°F) comes after June 2 in half of springs and before September 21 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Cimarron in zone 5b in ZIP code 81220, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, the station is in zone 4b: the coldest night of a typical year reaches −24°F (30 complete years); the map interpolates between stations and terrain, so the station and the ZIP area can differ by half a zone.
Frost dates for every NOAA station in Colorado · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00051609; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026; the station zone: ACIS daily lows, 1991-2020. 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 at Cimarron?
In a normal year in Cimarron, 10 days a year reach 90°F, 235 nights fall to 32°F or colder and 80 days bring measurable precipitation.
- Days at 90°F or more
- 10a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 235a normal year
- Days that stay below freezing
- 32high of 32°F or less
- Days with 0.01 inch of precipitation
- 80a normal year
- Days with 1 inch of snow or more
- 22a normal year
The highest temperature in this station's record (since 1951) is 98°F, on July 30, 1961; the lowest is −43°F, on January 13, 1963.
The wettest calendar year on that record is 1952, with 23.74 in; the snowiest season is 1983–84, with 150.0 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00051609; records: ACIS (NOAA Regional Climate Centers), station USC00051609. Records use complete months only; a month missing more than three days is left out.
How sunny is it at Cimarron?
Over a year 79% of the sunlight that would reach the ground under clear skies gets through the clouds at Cimarron, 5.0 kWh per square metre a day. June is the sunniest month (85%) and December the cloudiest (74%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 76% | 2.7 |
| February | 74% | 3.6 |
| March | 79% | 5.1 |
| April | 76% | 6.0 |
| May | 76% | 6.8 |
| June | 85% | 7.9 |
| July | 80% | 7.0 |
| August | 79% | 6.2 |
| September | 82% | 5.4 |
| October | 81% | 4.1 |
| November | 78% | 2.9 |
| December | 74% | 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 many heating and cooling degree days does Cimarron record?
A normal year at Cimarron brings 8,090 heating degree days, 51% more than the median U.S. place (5,373), and 87 cooling degree days, 90% 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 1,503 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,434 | 0 |
| February | 1,128 | 0 |
| March | 936 | 0 |
| April | 659 | 0 |
| May | 431 | 0 |
| June | 180 | 6 |
| July | 38 | 50 |
| August | 66 | 28 |
| September | 260 | 2 |
| October | 620 | 0 |
| November | 974 | 0 |
| December | 1,366 | 0 |
| Year (annual) | 8,090 | 87 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00051609. 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.
Have recent years at Cimarron been warmer than normal?
2025 averaged 44.8°F, 1.8°F above the 1991-2020 normal of 43.0°F. 3 of the 5 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2021 | 44.5°F | +1.5°F | 12.18 | 55.5 |
| 2022 | 42.9°F | −0.1°F | 12.14 | 72.8 |
| 2023 | 42.0°F | −1.0°F | 12.68 | 87.6 |
| 2024 | 44.3°F | +1.3°F | 14.12 | 79.1 |
| 2025 | 44.8°F | +1.8°F | 11.27 | 54.6 |
Over 49 complete years from 1952 to 2025, the station's annual mean temperature rose at a fitted 5.9°F per century (+0.33°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00051609; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Cimarron's climate compare?
Cimarron is warmer than 29 of the 125 places with their own NOAA record in Colorado, and wetter than 43. Across the 7,247 U.S. stations with normals, its annual mean of 43.0°F is warmer than 12%.
In the Köppen classification computed from these normals, Cimarron 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.
Questions about Cimarron's climate
What is the coldest month at Cimarron?
January, with a normal high of 35°F and a normal low of 3°F. The warmest is July (86°F by day, 45°F at night).
Does it snow at Cimarron?
Yes: 67 inches in a normal year, falling on 28 days with 0.1 inch or more, the most in January (14.5 inches).
What is the rainiest month at Cimarron?
September, with 1.82 in of precipitation in a normal year; the driest is June with 0.68 in.
What plant hardiness zone is Cimarron in?
The USDA's 2023 map puts Cimarron in zone 5b in ZIP code 81220, the nearest ZIP area. By the same method at the station, the coldest night of a typical year reaches −24°F (30 years, 1991-2020): zone 4b.
How late can frost come at Cimarron?
In half of years the last 32°F night comes after June 20; in one year in ten it comes after July 7. Waiting until July 7 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 Canyon Of The Gunnison, CO11 miles from this station, 45.2°F a year
- Montrose, CO19 miles from this station, 50.3°F a year
- Blue Mesa Lake, CO21 miles from this station, 39.7°F a year
- Ridgway, CO23 miles from this station, 44.1°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made