Holly, Colorado climate: Normal weather by month, frost dates and records
Holly's normal year runs from 15°F January nights to 93°F July afternoons, with 17.3 inches of precipitation and 22 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 11.8°C, January lows of −9°C, July highs of 34°C, 438 mm of precipitation a year.
- NOAA stationHolly
- Station IDUSC00054076
- Location38.05°N 102.13°W
- Elevation3,401 ft (1,037 m)
- Population843
On October 23, the normal high in Holly is 68°F and the normal low 34°F, and the chance of measurable rain or snow is 13%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Holly.
- Jan 46° 15°
- Feb 50° 18°
- Mar 60° 26°
- Apr 68° 34°
- May 78° 46°
- Jun 89° 56°
- Jul 93° 63°
- Aug 91° 61°
- Sep 83° 51°
- Oct 71° 37°
- Nov 57° 24°
- Dec 46° 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 Holly each month?
July is the warmest month, with normal highs of 93°F; January the coldest, with normal lows of 15°F. The most precipitation falls in July (2.99 in), the least in February (0.34 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 46°F | 15°F | 30.5°F | 0.39 | 4.2 | 2 | <1 | 31 | 9 h 50 min |
| February | 50°F | 18°F | 33.9°F | 0.34 | 3.4 | 3 | <1 | 27 | 10 h 50 min |
| March | 60°F | 26°F | 43.2°F | 0.88 | 4.7 | 4 | <1 | 25 | 11 h 50 min |
| April | 68°F | 34°F | 51.3°F | 1.45 | 1.4 | 6 | 1 | 12 | 13 h 10 min |
| May | 78°F | 46°F | 61.8°F | 2.16 | 0.7 | 8 | 5 | 1 | 14 h 10 min |
| June | 89°F | 56°F | 72.7°F | 2.51 | 0.0 | 8 | 16 | <1 | 14 h 50 min |
| July | 93°F | 63°F | 78.1°F | 2.99 | 0.0 | 8 | 22 | <1 | 14 h 30 min |
| August | 91°F | 61°F | 75.7°F | 2.89 | 0.0 | 7 | 18 | <1 | 13 h 40 min |
| September | 83°F | 51°F | 67.1°F | 1.18 | 0.0 | 5 | 10 | <1 | 12 h 30 min |
| October | 71°F | 37°F | 53.7°F | 1.33 | 1.0 | 4 | 2 | 9 | 11 h 20 min |
| November | 57°F | 24°F | 40.6°F | 0.61 | 3.2 | 3 | <1 | 26 | 10 h 10 min |
| December | 46°F | 15°F | 30.7°F | 0.52 | 2.9 | 3 | <1 | 31 | 9 h 30 min |
| Year (annual) | 69°F | 37°F | 53.3°F | 17.25 | 21.5 | 60 | 73 | 161 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 8°C | −9°C | −0.8°C | 10 mm | 11 cm |
| February | 10°C | −8°C | 1.1°C | 9 mm | 9 cm |
| March | 16°C | −3°C | 6.2°C | 22 mm | 12 cm |
| April | 20°C | 1°C | 10.7°C | 37 mm | 4 cm |
| May | 26°C | 8°C | 16.6°C | 55 mm | 2 cm |
| June | 32°C | 13°C | 22.6°C | 64 mm | 0 cm |
| July | 34°C | 17°C | 25.6°C | 76 mm | 0 cm |
| August | 33°C | 16°C | 24.3°C | 73 mm | 0 cm |
| September | 28°C | 11°C | 19.5°C | 30 mm | 0 cm |
| October | 21°C | 3°C | 12.1°C | 34 mm | 3 cm |
| November | 14°C | −4°C | 4.8°C | 15 mm | 8 cm |
| December | 8°C | −9°C | −0.7°C | 13 mm | 7 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00054076; 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 Holly?
Normal highs sit between 65°F and 85°F in April, May, September and October. Of those, October 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 USC00054076.
When is the last frost in Holly?
In Holly, the last spring frost (32°F) comes after May 1 in half of years and after May 14 in one year in ten; the first autumn frost comes before October 12 in half of years and before September 29 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 11 year in 10 after May 14; 9 in 10 after April 18
- First autumn frost, half of years before
- October 121 year in 10 before September 29; 9 in 10 before October 23
NOAA puts the median frost-free season at 163 days, and the season without a hard freeze (28°F) at 181 days.
A hard freeze (28°F) comes after April 21 in half of springs and before October 21 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Holly in zone 6a in ZIP code 81047, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Holly's NOAA station is in zone 6a: the coldest night of a typical year reaches −7°F (22 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 USC00054076; 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 Holly?
In a normal year in Holly, 73 days a year reach 90°F (15 of them 100°F or more), 161 nights fall to 32°F or colder and 60 days bring measurable precipitation.
- Days at 90°F or more
- 73a normal year
- Days at 100°F or more
- 15a normal year
- Nights at 32°F or colder
- 161a normal year
- Days that stay below freezing
- 18high of 32°F or less
- Days with 0.01 inch of precipitation
- 60a normal year
- Days with 1 inch of snow or more
- 7a normal year
The highest temperature in this station's record (since 1900) is 110°F, on June 12, 1952; the lowest is −28°F, on January 30, 1949.
The wettest calendar year on that record is 1941, with 28.79 in; the snowiest season is 1987–88, with 52.8 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00054076; records: ACIS (NOAA Regional Climate Centers), station USC00054076. Records use complete months only; a month missing more than three days is left out.
How sunny is Holly?
Over a year 84% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Holly, 5.0 kWh per square metre a day. July is the sunniest month (90%) and February the cloudiest (76%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 79% | 2.7 |
| February | 76% | 3.5 |
| March | 80% | 4.9 |
| April | 80% | 6.0 |
| May | 82% | 6.9 |
| June | 88% | 7.6 |
| July | 90% | 7.5 |
| August | 89% | 6.6 |
| September | 87% | 5.5 |
| October | 83% | 4.1 |
| November | 83% | 3.0 |
| December | 78% | 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 Holly need?
A normal year in Holly brings 5,439 heating degree days, 1% more than the median U.S. place (5,373), and 1,199 cooling degree days, 32% more 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 3,636 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,070 | 0 |
| February | 871 | 0 |
| March | 674 | 0 |
| April | 415 | 4 |
| May | 160 | 63 |
| June | 17 | 246 |
| July | 1 | 406 |
| August | 3 | 336 |
| September | 72 | 133 |
| October | 361 | 11 |
| November | 732 | 0 |
| December | 1,063 | 0 |
| Year (annual) | 5,439 | 1,199 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00054076. 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.
Has Holly been warmer than normal lately?
2025 averaged 54.4°F, 1.1°F above the 1991-2020 normal of 53.3°F. 3 of the 5 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2021 | 53.5°F | +0.2°F | 19.20 | 8.5 |
| 2022 | 53.0°F | −0.3°F | 11.79 | 22.1 |
| 2023 | 52.9°F | −0.4°F | 19.68 | 19.6 |
| 2024 | 55.2°F | +1.9°F | 16.50 | 17.2 |
| 2025 | 54.4°F | +1.1°F | 18.33 | 5.9 |
Over 77 complete years from 1901 to 2025, the station's annual mean temperature rose at a fitted 1.2°F per century (+0.07°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00054076; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Holly's climate compare?
Holly is warmer than 117 of the other 124 places with their own NOAA record in Colorado, and wetter than 84. Across the 7,247 U.S. stations with normals, its annual mean of 53.3°F is warmer than 55%.
In the Köppen classification computed from these normals, Holly 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 Holly 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.
- Granada, CO447 people · 10 mi W
- Coolidge, KS78 people · 7 mi E
- Hartman, CO57 people · 7 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 Holly's climate
What is the coldest month in Holly?
January, with a normal high of 46°F and a normal low of 15°F. The warmest is July (93°F by day, 63°F at night).
Does it snow in Holly?
Yes: 22 inches in a normal year, falling on 9 days with 0.1 inch or more, the most in March (4.7 inches).
What is the rainiest month in Holly?
July, with 2.99 in of precipitation in a normal year; the driest is February with 0.34 in.
What plant hardiness zone is Holly in?
The USDA's 2023 map puts Holly in zone 6a in ZIP code 81047, the nearest ZIP area. By the same method at Holly's NOAA station, the coldest night of a typical year reaches −7°F (22 years, 1991-2020): zone 6a.
How late can frost come in Holly?
In half of years the last 32°F night comes after May 1; in one year in ten it comes after May 14. Waiting until May 14 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Colorado climateThe statewide normals and every place in the state
- Syracuse, KS22 miles from this station, 53.4°F a year
- Sheridan Lake, CO30 miles from this station, 52.3°F a year
- Lamar, CO30 miles from this station, 54.0°F a year
- Tribune, KS35 miles from this station, 52.2°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made