Colony, Wyoming climate: Climate normals at a NOAA weather station
Colony's normal year runs from 15°F January nights to 86°F July afternoons, with 14.2 inches of precipitation and 25 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 8.1°C, January lows of −9°C, July highs of 30°C, 361 mm of precipitation a year.
- NOAA stationColony
- Station IDUSC00481905
- Location44.87°N 104.15°W
- Elevation3,480 ft (1,061 m)
On October 23, the normal high in Colony is 55°F and the normal low 33°F, and the chance of measurable rain or snow is 14%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Colony.
- Jan 33° 15°
- Feb 36° 16°
- Mar 46° 24°
- Apr 55° 33°
- May 66° 43°
- Jun 77° 52°
- Jul 86° 59°
- Aug 85° 58°
- Sep 74° 48°
- Oct 59° 36°
- Nov 44° 24°
- Dec 35° 16°
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 Colony each month?
July is the warmest month, with normal highs of 86°F; January the coldest, with normal lows of 15°F. The most precipitation falls in May (2.69 in), the least in January (0.26 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 33°F | 15°F | 24.0°F | 0.26 | 4.6 | 3 | <1 | 29 | 9 h 10 min |
| February | 36°F | 16°F | 25.9°F | 0.58 | 4.7 | 3 | <1 | 25 | 10 h 20 min |
| March | 46°F | 24°F | 34.9°F | 0.70 | 3.5 | 4 | <1 | 24 | 11 h 50 min |
| April | 55°F | 33°F | 43.9°F | 1.63 | 3.2 | 7 | <1 | 15 | 13 h 30 min |
| May | 66°F | 43°F | 54.3°F | 2.69 | 0.1 | 8 | <1 | 4 | 14 h 50 min |
| June | 77°F | 52°F | 64.5°F | 2.11 | 0.0 | 7 | 3 | <1 | 15 h 30 min |
| July | 86°F | 59°F | 72.6°F | 1.91 | 0.0 | 7 | 12 | <1 | 15 h 20 min |
| August | 85°F | 58°F | 71.2°F | 1.28 | 0.0 | 5 | 11 | <1 | 14 h 10 min |
| September | 74°F | 48°F | 61.2°F | 1.12 | 0.0 | 4 | 3 | 1 | 12 h 40 min |
| October | 59°F | 36°F | 47.3°F | 1.14 | 1.7 | 5 | <1 | 10 | 11 h |
| November | 44°F | 24°F | 34.3°F | 0.54 | 4.6 | 3 | <1 | 23 | 9 h 40 min |
| December | 35°F | 16°F | 25.4°F | 0.26 | 2.9 | 3 | <1 | 29 | 8 h 50 min |
| Year (annual) | 58°F | 35°F | 46.6°F | 14.22 | 25.3 | 59 | 29 | 160 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 1°C | −9°C | −4.4°C | 7 mm | 12 cm |
| February | 2°C | −9°C | −3.4°C | 15 mm | 12 cm |
| March | 8°C | −4°C | 1.6°C | 18 mm | 9 cm |
| April | 13°C | 0°C | 6.6°C | 41 mm | 8 cm |
| May | 19°C | 6°C | 12.4°C | 68 mm | 0 cm |
| June | 25°C | 11°C | 18.1°C | 54 mm | 0 cm |
| July | 30°C | 15°C | 22.6°C | 49 mm | 0 cm |
| August | 29°C | 14°C | 21.8°C | 33 mm | 0 cm |
| September | 24°C | 9°C | 16.2°C | 28 mm | 0 cm |
| October | 15°C | 2°C | 8.5°C | 29 mm | 4 cm |
| November | 7°C | −4°C | 1.3°C | 14 mm | 12 cm |
| December | 2°C | −9°C | −3.7°C | 7 mm | 7 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00481905; 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 Colony?
Normal highs sit between 65°F and 85°F in May, June, August and September. Of those, September 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 USC00481905.
When is the last frost at Colony?
In Colony, the last spring frost (32°F) comes after May 7 in half of years and after May 21 in one year in ten; the first autumn frost comes before October 3 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 71 year in 10 after May 21; 9 in 10 after April 26
- First autumn frost, half of years before
- October 31 year in 10 before September 19; 9 in 10 before October 18
NOAA puts the median frost-free season at 149 days, and the season without a hard freeze (28°F) at 167 days.
A hard freeze (28°F) comes after April 28 in half of springs and before October 13 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Colony in zone 5a in ZIP code 82710, the nearest ZIP area.
Frost dates for every NOAA station in Wyoming · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00481905; 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 at Colony?
In a normal year in Colony, 29 days a year reach 90°F (4 of them 100°F or more), 160 nights fall to 32°F or colder and 59 days bring measurable precipitation.
- Days at 90°F or more
- 29a normal year
- Days at 100°F or more
- 4a normal year
- Nights at 32°F or colder
- 160a normal year
- Days that stay below freezing
- 49high of 32°F or less
- Days with 0.01 inch of precipitation
- 59a normal year
- Days with 1 inch of snow or more
- 10a normal year
The highest temperature in this station's record (since 1915) is 112°F, on July 7, 1981; the lowest is −39°F, on February 14, 1936.
The wettest calendar year on that record is 1923, with 29.37 in; the snowiest season is 1919–20, with 103.5 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00481905; records: ACIS (NOAA Regional Climate Centers), station USC00481905. Records use complete months only; a month missing more than three days is left out.
How sunny is it at Colony?
Over a year 78% of the sunlight that would reach the ground under clear skies gets through the clouds at Colony, 4.3 kWh per square metre a day. July is the sunniest month (87%) and April the cloudiest (71%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 74% | 1.9 |
| February | 75% | 2.9 |
| March | 74% | 4.0 |
| April | 71% | 5.0 |
| May | 72% | 6.0 |
| June | 81% | 7.0 |
| July | 87% | 7.2 |
| August | 87% | 6.2 |
| September | 82% | 4.7 |
| October | 74% | 3.1 |
| November | 74% | 2.1 |
| December | 71% | 1.6 |
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 Colony record?
A normal year at Colony brings 7,291 heating degree days, 36% more than the median U.S. place (5,373), and 629 cooling degree days, 31% 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 2,503 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,271 | 0 |
| February | 1,093 | 0 |
| March | 935 | 0 |
| April | 635 | 1 |
| May | 342 | 10 |
| June | 94 | 77 |
| July | 15 | 252 |
| August | 28 | 220 |
| September | 178 | 64 |
| October | 553 | 5 |
| November | 921 | 0 |
| December | 1,226 | 0 |
| Year (annual) | 7,291 | 629 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00481905. 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 Colony's climate compare?
Colony is warmer than 56 of the 71 places with their own NOAA record in Wyoming, and wetter than 41. Across the 7,247 U.S. stations with normals, its annual mean of 46.6°F is warmer than 26%.
In the Köppen classification computed from these normals, Colony 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.
Which places near Colony share this climate record?
Alzada has no NOAA station with 1991-2020 normals of its 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.
- Alzada, MT17 people · 16 mi NW
Source: Census Bureau 2024 Gazetteer (place centers) and Vintage 2024 population estimates. Distance and direction from the station to each place's center.
Questions about Colony's climate
What is the coldest month at Colony?
January, with a normal high of 33°F and a normal low of 15°F. The warmest is July (86°F by day, 59°F at night).
Does it snow at Colony?
Yes: 25 inches in a normal year, falling on 15 days with 0.1 inch or more, the most in February (4.7 inches).
What is the rainiest month at Colony?
May, with 2.69 in of precipitation in a normal year; the driest is January with 0.26 in.
What plant hardiness zone is Colony in?
The USDA's 2023 map puts Colony in zone 5a in ZIP code 82710, the nearest ZIP area.
How late can frost come at Colony?
In half of years the last 32°F night comes after May 7; in one year in ten it comes after May 21. Waiting until May 21 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Wyoming climateThe statewide normals and every place in the state
- Belle Fourche, SD21 miles from this station, 47.9°F a year
- Albion (1 mi N), MT24 miles from this station, 40.3°F a year
- Hulett, WY25 miles from this station, 45.0°F a year
- Bear Ridge, SD26 miles from this station, 46.7°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made