Crook, Colorado climate: Normal weather by month, frost dates and records
Crook's normal year runs from 13°F January nights to 92°F July afternoons, with 16.9 inches of precipitation and 25 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 10.3°C, January lows of −10°C, July highs of 33°C, 429 mm of precipitation a year.
- NOAA stationCrook
- Station IDUSC00051996
- Location40.86°N 102.80°W
- Elevation3,709 ft (1,131 m)
- Population125
On October 23, the normal high in Crook is 65°F and the normal low 30°F, and the chance of measurable rain or snow is 18%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Crook.
- Jan 44° 13°
- Feb 47° 16°
- Mar 57° 24°
- Apr 65° 31°
- May 73° 42°
- Jun 85° 52°
- Jul 92° 58°
- Aug 90° 56°
- Sep 82° 47°
- Oct 68° 34°
- Nov 55° 22°
- Dec 44° 14°
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 Crook each month?
July is the warmest month, with normal highs of 92°F; January the coldest, with normal lows of 13°F. The most precipitation falls in May (2.75 in), the least in January (0.31 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 44°F | 13°F | 28.6°F | 0.31 | 2.9 | 3 | <1 | 31 | 9 h 30 min |
| February | 47°F | 16°F | 31.2°F | 0.50 | 6.5 | 5 | <1 | 28 | 10 h 40 min |
| March | 57°F | 24°F | 40.5°F | 0.89 | 3.6 | 6 | <1 | 27 | 11 h 50 min |
| April | 65°F | 31°F | 47.9°F | 1.80 | 3.0 | 9 | <1 | 17 | 13 h 20 min |
| May | 73°F | 42°F | 57.7°F | 2.75 | 0.4 | 11 | 3 | 4 | 14 h 30 min |
| June | 85°F | 52°F | 68.9°F | 2.63 | 0.0 | 10 | 11 | <1 | 15 h 10 min |
| July | 92°F | 58°F | 75.0°F | 2.61 | 0.0 | 9 | 22 | <1 | 14 h 50 min |
| August | 90°F | 56°F | 72.9°F | 2.09 | 0.0 | 9 | 18 | <1 | 13 h 50 min |
| September | 82°F | 47°F | 64.3°F | 1.38 | 0.1 | 6 | 9 | 1 | 12 h 30 min |
| October | 68°F | 34°F | 50.8°F | 1.16 | 1.6 | 6 | 1 | 13 | 11 h 10 min |
| November | 55°F | 22°F | 38.6°F | 0.45 | 2.6 | 4 | <1 | 27 | 10 h |
| December | 44°F | 14°F | 29.0°F | 0.33 | 4.7 | 3 | <1 | 31 | 9 h 20 min |
| Year (annual) | 67°F | 34°F | 50.5°F | 16.90 | 25.4 | 81 | 63 | 178 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 7°C | −10°C | −1.9°C | 8 mm | 7 cm |
| February | 8°C | −9°C | −0.4°C | 13 mm | 17 cm |
| March | 14°C | −5°C | 4.7°C | 23 mm | 9 cm |
| April | 18°C | 0°C | 8.8°C | 46 mm | 8 cm |
| May | 23°C | 5°C | 14.3°C | 70 mm | 1 cm |
| June | 30°C | 11°C | 20.5°C | 67 mm | 0 cm |
| July | 33°C | 15°C | 23.9°C | 66 mm | 0 cm |
| August | 32°C | 13°C | 22.7°C | 53 mm | 0 cm |
| September | 28°C | 8°C | 17.9°C | 35 mm | 0 cm |
| October | 20°C | 1°C | 10.4°C | 29 mm | 4 cm |
| November | 13°C | −6°C | 3.7°C | 11 mm | 7 cm |
| December | 7°C | −10°C | −1.7°C | 8 mm | 12 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00051996; 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 Crook?
Normal highs sit between 65°F and 85°F in May, September and October. Of those, September has the fewest days with rain (6).
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 USC00051996.
When is the last frost in Crook?
In Crook, the last spring frost (32°F) comes after May 11 in half of years and after May 23 in one year in ten; the first autumn frost comes before October 4 in half of years and before September 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
- May 111 year in 10 after May 23; 9 in 10 after May 1
- First autumn frost, half of years before
- October 41 year in 10 before September 23; 9 in 10 before October 15
NOAA puts the median frost-free season at 145 days, and the season without a hard freeze (28°F) at 163 days.
A hard freeze (28°F) comes after May 2 in half of springs and before October 12 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Crook in zone 5b in ZIP code 80726, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Crook's NOAA station is in zone 5b: the coldest night of a typical year reaches −14°F (20 complete years).
Frost dates for every NOAA station in Colorado · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00051996; 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 in Crook?
In a normal year in Crook, 63 days a year reach 90°F (12 of them 100°F or more), 178 nights fall to 32°F or colder and 81 days bring measurable precipitation.
- Days at 90°F or more
- 63a normal year
- Days at 100°F or more
- 12a normal year
- Nights at 32°F or colder
- 178a normal year
- Days that stay below freezing
- 20high of 32°F or less
- Days with 0.01 inch of precipitation
- 81a normal year
- Days with 1 inch of snow or more
- 13a normal year
Source: NOAA NCEI 1991-2020 annual normals, station USC00051996.
How sunny is Crook?
Over a year 81% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Crook, 4.7 kWh per square metre a day. July is the sunniest month (88%) and February the cloudiest (75%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 79% | 2.4 |
| February | 75% | 3.2 |
| March | 77% | 4.5 |
| April | 75% | 5.6 |
| May | 77% | 6.4 |
| June | 85% | 7.4 |
| July | 88% | 7.2 |
| August | 87% | 6.3 |
| September | 86% | 5.2 |
| October | 80% | 3.7 |
| November | 80% | 2.7 |
| December | 77% | 2.1 |
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 Crook need?
A normal year in Crook brings 6,125 heating degree days, 14% more than the median U.S. place (5,373), and 851 cooling degree days, 6% fewer than the median (908). Seven months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 3,013 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,128 | 0 |
| February | 945 | 0 |
| March | 760 | 0 |
| April | 514 | 1 |
| May | 256 | 28 |
| June | 44 | 159 |
| July | 3 | 315 |
| August | 11 | 255 |
| September | 109 | 87 |
| October | 445 | 5 |
| November | 792 | 0 |
| December | 1,117 | 0 |
| Year (annual) | 6,125 | 851 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00051996. 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 Crook's climate compare?
Crook is warmer than 84 of the other 124 places with their own NOAA record in Colorado, and wetter than 79. Across the 7,247 U.S. stations with normals, its annual mean of 50.5°F is warmer than 43%.
In the Köppen classification computed from these normals, Crook is BSk: cold semi-arid steppe. 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 Crook's climate
What is the coldest month in Crook?
January, with a normal high of 44°F and a normal low of 13°F. The warmest is July (92°F by day, 58°F at night).
Does it snow in Crook?
Yes: 25 inches in a normal year, falling on 16 days with 0.1 inch or more, the most in February (6.5 inches).
What is the rainiest month in Crook?
May, with 2.75 in of precipitation in a normal year; the driest is January with 0.31 in.
What plant hardiness zone is Crook in?
The USDA's 2023 map puts Crook in zone 5b in ZIP code 80726, the nearest ZIP area. By the same method at Crook's NOAA station, the coldest night of a typical year reaches −14°F (20 years, 1991-2020): zone 5b.
How late can frost come in Crook?
In half of years the last 32°F night comes after May 11; in one year in ten it comes after May 23. Waiting until May 23 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Colorado climateThe statewide normals and every place in the state
- Fleming, CO15 miles from this station, 50.8°F a year
- Sedgwick, CO15 miles from this station, 49.6°F a year
- Sidney, NE19 miles from this station, 48.5°F a year
- Lodgepole, NE22 miles from this station, 49.1°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made