Arapahoe (14 mi N), Colorado climate: Climate normals at a NOAA weather station
Arapahoe (14 mi N)'s normal year runs from 18°F December nights to 90°F July afternoons. (NOAA 1991-2020 normals)
In metric: a yearly mean of 10.4°C, December lows of −8°C, July highs of 32°C.
- NOAA stationArapahoe (14 mi N)
- Station IDUSC00050301
- Location39.04°N 102.17°W
- Elevation4,142 ft (1,263 m)
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Arapahoe (14 mi N).
- Jan 44° 17°
- Feb 46° 18°
- Mar 56° 26°
- Apr 63° 33°
- May 72° 43°
- Jun 85° 53°
- Jul 90° 59°
- Aug 87° 57°
- Sep 80° 49°
- Oct 67° 36°
- Nov 54° 25°
- Dec 43° 18°
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 Arapahoe (14 mi N) each month?
July is the warmest month, with normal highs of 90°F; December the coldest, with normal lows of 18°F.
| Month | High | Low | Mean | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|
| January | 44°F | 17°F | 30.4°F | – | <1 | 30 | 9 h 40 min |
| February | 46°F | 18°F | 31.7°F | – | <1 | 27 | 10 h 40 min |
| March | 56°F | 26°F | 40.6°F | – | <1 | 25 | 11 h 50 min |
| April | 63°F | 33°F | 47.9°F | – | <1 | 16 | 13 h 10 min |
| May | 72°F | 43°F | 57.6°F | – | 2 | 2 | 14 h 20 min |
| June | 85°F | 53°F | 69.0°F | – | 8 | <1 | 14 h 50 min |
| July | 90°F | 59°F | 74.6°F | – | 17 | <1 | 14 h 40 min |
| August | 87°F | 57°F | 71.8°F | – | 14 | <1 | 13 h 40 min |
| September | 80°F | 49°F | 64.3°F | – | 6 | 1 | 12 h 30 min |
| October | 67°F | 36°F | 51.4°F | – | 1 | 11 | 11 h 10 min |
| November | 54°F | 25°F | 39.5°F | – | <1 | 25 | 10 h |
| December | 43°F | 18°F | 30.2°F | – | <1 | 30 | 9 h 30 min |
| Year (annual) | 66°F | 36°F | 50.7°F | – | 48 | 167 |
The same normals in °C and millimetres
| Month | High | Low | Mean |
|---|---|---|---|
| January | 7°C | −8°C | −0.9°C |
| February | 8°C | −8°C | −0.2°C |
| March | 13°C | −4°C | 4.8°C |
| April | 17°C | 0°C | 8.8°C |
| May | 22°C | 6°C | 14.2°C |
| June | 29°C | 12°C | 20.6°C |
| July | 32°C | 15°C | 23.7°C |
| August | 30°C | 14°C | 22.1°C |
| September | 27°C | 9°C | 17.9°C |
| October | 20°C | 2°C | 10.8°C |
| November | 12°C | −4°C | 4.2°C |
| December | 6°C | −8°C | −1.0°C |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Cheyenne Wells (15 miles away), gets 20 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00050301; 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 Arapahoe (14 mi N)?
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 USC00050301.
When is the last frost at Arapahoe (14 mi N)?
In Arapahoe (14 mi N), the last spring frost (32°F) comes after May 9 in half of years and after May 22 in one year in ten; the first autumn frost comes before October 7 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 91 year in 10 after May 22; 9 in 10 after April 27
- First autumn frost, half of years before
- October 71 year in 10 before September 23; 9 in 10 before October 19
NOAA puts the median frost-free season at 150 days, and the season without a hard freeze (28°F) at 167 days.
A hard freeze (28°F) comes after April 30 in half of springs and before October 15 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Arapahoe (14 mi N) in zone 6a in ZIP code 80802, 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 USC00050301; 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 Arapahoe (14 mi N)?
In a normal year in Arapahoe (14 mi N), 48 days a year reach 90°F (6 of them 100°F or more) and 167 nights fall to 32°F or colder.
- Days at 90°F or more
- 48a normal year
- Days at 100°F or more
- 6a normal year
- Nights at 32°F or colder
- 167a normal year
- Days that stay below freezing
- 26high of 32°F or less
Source: NOAA NCEI 1991-2020 annual normals, station USC00050301.
How sunny is it at Arapahoe (14 mi N)?
Over a year 82% of the sunlight that would reach the ground under clear skies gets through the clouds at Arapahoe (14 mi N), 4.9 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% | 2.6 |
| February | 75% | 3.4 |
| March | 78% | 4.7 |
| April | 77% | 5.7 |
| May | 79% | 6.6 |
| June | 86% | 7.4 |
| July | 88% | 7.3 |
| August | 88% | 6.5 |
| September | 86% | 5.3 |
| October | 81% | 3.9 |
| November | 81% | 2.8 |
| December | 78% | 2.2 |
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 Arapahoe (14 mi N) record?
A normal year at Arapahoe (14 mi N) brings 5,970 heating degree days, 11% more than the median U.S. place (5,373), and 805 cooling degree days, 11% 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 3,009 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,073 | 0 |
| February | 933 | 0 |
| March | 757 | 0 |
| April | 514 | 1 |
| May | 254 | 27 |
| June | 41 | 161 |
| July | 5 | 301 |
| August | 13 | 223 |
| September | 109 | 86 |
| October | 429 | 6 |
| November | 764 | 0 |
| December | 1,078 | 0 |
| Year (annual) | 5,970 | 805 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00050301. 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 Arapahoe (14 mi N)'s climate compare?
Arapahoe (14 mi N) is warmer than 88 of the 125 places with their own NOAA record in Colorado. Across the 7,247 U.S. stations with normals, its annual mean of 50.7°F is warmer than 44%.
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers.
Which places near Arapahoe (14 mi N) share this climate record?
Weskan 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.
- Weskan, KS163 people · 16 mi SE
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 Arapahoe (14 mi N)'s climate
What is the coldest month at Arapahoe (14 mi N)?
December, with a normal high of 43°F and a normal low of 18°F. The warmest is July (90°F by day, 59°F at night).
Does it snow at Arapahoe (14 mi N)?
Yes. NOAA publishes no 1991-2020 snowfall normal for the station; the nearest record that keeps one, Cheyenne Wells (15 miles away), records 20 inches of snow in a normal year.
What plant hardiness zone is Arapahoe (14 mi N) in?
The USDA's 2023 map puts Arapahoe (14 mi N) in zone 6a in ZIP code 80802, the nearest ZIP area.
How late can frost come at Arapahoe (14 mi N)?
In half of years the last 32°F night comes after May 9; in one year in ten it comes after May 22. Waiting until May 22 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Colorado climateThe statewide normals and every place in the state
- Cheyenne Wells, CO16 miles from this station, 52.7°F a year
- Burlington, CO16 miles from this station, 51.4°F a year
- Sharon Springs, KS24 miles from this station, 52.9°F a year
- Arapahoe (12 mi S), CO24 miles from this station, 52.0°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made