Ellicott, Colorado climate: Normal weather by month, frost dates and records
Ellicott's normal year runs from 15°F January nights to 87°F July afternoons, with 15.0 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 10.4°C, January lows of −10°C, July highs of 31°C, 381 mm of precipitation a year.
- NOAA stationEllicott (7 mi S)
- Station IDUSC00052668
- Location38.74°N 104.40°W
- Elevation5,739 ft (1,749 m)
- Population (census place)1,337
On October 23, the normal high in Ellicott is 64°F and the normal low 32°F.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Ellicott.
- Jan 46° 15°
- Feb 49° 19°
- Mar 58° 26°
- Apr 65° 35°
- May 74° 44°
- Jun 84° 49°
- Jul 87° 55°
- Aug 86° 56°
- Sep 79° 46°
- Oct 67° 35°
- Nov 56° 24°
- Dec 47° 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 in Ellicott each month?
July is the warmest month, with normal highs of 87°F; January the coldest, with normal lows of 15°F. The most precipitation falls in July (2.99 in), the least in December (0.21 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 46°F | 15°F | 30.5°F | 0.29 | – | <1 | 31 | 9 h 40 min |
| February | 49°F | 19°F | 34.1°F | 0.28 | – | <1 | 25 | 10 h 40 min |
| March | 58°F | 26°F | 41.9°F | 0.76 | – | <1 | 22 | 11 h 50 min |
| April | 65°F | 35°F | 49.7°F | 1.44 | – | <1 | 12 | 13 h 10 min |
| May | 74°F | 44°F | 59.1°F | 1.92 | – | 1 | 4 | 14 h 20 min |
| June | 84°F | 49°F | 66.4°F | 1.66 | – | 10 | <1 | 14 h 50 min |
| July | 87°F | 55°F | 71.4°F | 2.99 | – | 16 | <1 | 14 h 40 min |
| August | 86°F | 56°F | 70.8°F | 2.94 | – | 11 | <1 | 13 h 40 min |
| September | 79°F | 46°F | 62.5°F | 1.32 | – | 5 | 1 | 12 h 30 min |
| October | 67°F | 35°F | 50.6°F | 0.82 | – | <1 | 12 | 11 h 20 min |
| November | 56°F | 24°F | 39.8°F | 0.36 | – | <1 | 24 | 10 h 10 min |
| December | 47°F | 16°F | 31.8°F | 0.21 | – | <1 | 30 | 9 h 30 min |
| Year (annual) | 66°F | 35°F | 50.7°F | 14.99 | – | 43 | 160 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 8°C | −10°C | −0.8°C | 7 mm |
| February | 10°C | −7°C | 1.2°C | 7 mm |
| March | 14°C | −3°C | 5.5°C | 19 mm |
| April | 18°C | 1°C | 9.8°C | 37 mm |
| May | 24°C | 7°C | 15.1°C | 49 mm |
| June | 29°C | 10°C | 19.1°C | 42 mm |
| July | 31°C | 13°C | 21.9°C | 76 mm |
| August | 30°C | 13°C | 21.6°C | 75 mm |
| September | 26°C | 8°C | 16.9°C | 34 mm |
| October | 19°C | 2°C | 10.3°C | 21 mm |
| November | 13°C | −4°C | 4.3°C | 9 mm |
| December | 8°C | −9°C | −0.1°C | 5 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Colorado Springs (16 miles away), gets 33 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00052668; 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 Ellicott?
Normal highs sit between 65°F and 85°F in May, June, September and October.
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 USC00052668.
When is the last frost in Ellicott?
In Ellicott, the last spring frost (32°F) comes after May 6 in half of years and after May 28 in one year in ten; the first autumn frost comes before October 3 in half of years and before September 21 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 61 year in 10 after May 28; 9 in 10 after April 21
- First autumn frost, half of years before
- October 31 year in 10 before September 21; 9 in 10 before October 16
NOAA puts the median frost-free season at 149 days, and the season without a hard freeze (28°F) at 169 days.
A hard freeze (28°F) comes after April 25 in half of springs and before October 12 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Ellicott in zone 6a in ZIP code 80930, the nearest ZIP area.
Frost dates for every NOAA station in Colorado · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00052668; 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 Ellicott?
In a normal year in Ellicott, 43 days a year reach 90°F and 160 nights fall to 32°F or colder.
- Days at 90°F or more
- 43a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 160a normal year
- Days that stay below freezing
- 13high of 32°F or less
Source: NOAA NCEI 1991-2020 annual normals, station USC00052668.
How sunny is Ellicott?
Over a year 82% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Ellicott, 5.0 kWh per square metre a day. September is the sunniest month (87%) and February the cloudiest (78%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 81% | 2.8 |
| February | 78% | 3.6 |
| March | 81% | 5.0 |
| April | 80% | 6.1 |
| May | 79% | 6.8 |
| June | 84% | 7.4 |
| July | 84% | 7.0 |
| August | 85% | 6.4 |
| September | 87% | 5.5 |
| October | 84% | 4.2 |
| November | 84% | 3.1 |
| December | 80% | 2.4 |
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 Ellicott need?
A normal year in Ellicott brings 5,773 heating degree days, 7% more than the median U.S. place (5,373), and 581 cooling degree days, 36% 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 2,769 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,071 | 0 |
| February | 867 | 0 |
| March | 716 | 0 |
| April | 462 | 2 |
| May | 217 | 34 |
| June | 54 | 94 |
| July | 7 | 204 |
| August | 11 | 191 |
| September | 129 | 52 |
| October | 450 | 4 |
| November | 758 | 0 |
| December | 1,031 | 0 |
| Year (annual) | 5,773 | 581 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00052668. 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 Ellicott been warmer than normal lately?
2021 averaged 49.4°F, 1.3°F below the 1991-2020 normal of 50.7°F.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 49.4°F | −1.3°F | 11.43 |
Source: observed years: ACIS, station USC00052668. A year counts only with all twelve months complete.
How does Ellicott's climate compare?
Ellicott is warmer than 88 of the other 124 places with their own NOAA record in Colorado, and wetter than 52. Across the 7,247 U.S. stations with normals, its annual mean of 50.7°F is warmer than 44%.
In the Köppen classification computed from these normals, Ellicott 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 Ellicott's climate
What is the coldest month in Ellicott?
January, with a normal high of 46°F and a normal low of 15°F. The warmest is July (87°F by day, 55°F at night).
Does it snow in Ellicott?
Yes. NOAA publishes no 1991-2020 snowfall normal for Ellicott's NOAA station; the nearest record that keeps one, Colorado Springs (16 miles away), records 33 inches of snow in a normal year.
What is the rainiest month in Ellicott?
July, with 2.99 in of precipitation in a normal year; the driest is December with 0.21 in.
What plant hardiness zone is Ellicott in?
The USDA's 2023 map puts Ellicott in zone 6a in ZIP code 80930, the nearest ZIP area.
How late can frost come in Ellicott?
In half of years the last 32°F night comes after May 6; in one year in ten it comes after May 28. Waiting until May 28 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Colorado climateThe statewide normals and every place in the state
- Colorado Springs, CO16 miles from this station, 50.4°F a year
- Rush (1 mi N), CO19 miles from this station, 48.5°F a year
- Cumbre Vista - Colorado Springs 1, CO22 miles from this station, 47.0°F a year
- Eastonville (2 mi NNW), CO28 miles from this station, 43.9°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made