Ignacio, Colorado climate: Normal weather by month, frost dates and records
Ignacio's normal year runs from 11°F January nights to 86°F July afternoons, with 13.5 inches of precipitation and 34 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 8.1°C, January lows of −12°C, July highs of 30°C, 343 mm of precipitation a year.
- NOAA stationIgnacio (6 mi ESE)
- Station IDUSC00054254
- Location37.09°N 107.53°W
- Elevation6,548 ft (1,996 m)
- Population847
On October 23, the normal high in Ignacio is 62°F and the normal low 27°F, and the chance of measurable rain or snow is 21%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Ignacio.
- Jan 38° 11°
- Feb 44° 16°
- Mar 55° 21°
- Apr 62° 27°
- May 71° 36°
- Jun 82° 44°
- Jul 86° 52°
- Aug 84° 50°
- Sep 76° 43°
- Oct 64° 30°
- Nov 51° 21°
- Dec 39° 12°
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 Ignacio each month?
July is the warmest month, with normal highs of 86°F; January the coldest, with normal lows of 11°F. The most precipitation falls in September (1.97 in), the least in June (0.40 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 38°F | 11°F | 24.5°F | 1.06 | 8.9 | 7 | <1 | 31 | 9 h 50 min |
| February | 44°F | 16°F | 30.1°F | 1.08 | 9.8 | 6 | <1 | 28 | 10 h 50 min |
| March | 55°F | 21°F | 37.9°F | 0.75 | 3.0 | 6 | <1 | 30 | 11 h 50 min |
| April | 62°F | 27°F | 44.7°F | 0.96 | 0.8 | 5 | <1 | 25 | 13 h 10 min |
| May | 71°F | 36°F | 53.7°F | 0.87 | 0.2 | 5 | <1 | 9 | 14 h 10 min |
| June | 82°F | 44°F | 62.8°F | 0.40 | 0.0 | 3 | 5 | <1 | 14 h 40 min |
| July | 86°F | 52°F | 68.9°F | 1.38 | 0.0 | 10 | 11 | <1 | 14 h 30 min |
| August | 84°F | 50°F | 67.0°F | 1.74 | 0.0 | 10 | 5 | <1 | 13 h 40 min |
| September | 76°F | 43°F | 59.5°F | 1.97 | 0.0 | 8 | <1 | 2 | 12 h 30 min |
| October | 64°F | 30°F | 47.3°F | 1.47 | 0.0 | 7 | <1 | 18 | 11 h 20 min |
| November | 51°F | 21°F | 35.8°F | 1.02 | 2.0 | 5 | <1 | 29 | 10 h 10 min |
| December | 39°F | 12°F | 25.8°F | 0.81 | 9.1 | 7 | <1 | 31 | 9 h 40 min |
| Year (annual) | 63°F | 30°F | 46.5°F | 13.51 | 33.8 | 78 | 21 | 202 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 4°C | −12°C | −4.2°C | 27 mm | 23 cm |
| February | 7°C | −9°C | −1.1°C | 27 mm | 25 cm |
| March | 13°C | −6°C | 3.3°C | 19 mm | 8 cm |
| April | 17°C | −3°C | 7.1°C | 24 mm | 2 cm |
| May | 22°C | 2°C | 12.1°C | 22 mm | 1 cm |
| June | 28°C | 7°C | 17.1°C | 10 mm | 0 cm |
| July | 30°C | 11°C | 20.5°C | 35 mm | 0 cm |
| August | 29°C | 10°C | 19.4°C | 44 mm | 0 cm |
| September | 25°C | 6°C | 15.3°C | 50 mm | 0 cm |
| October | 18°C | −1°C | 8.5°C | 37 mm | 0 cm |
| November | 11°C | −6°C | 2.1°C | 26 mm | 5 cm |
| December | 4°C | −11°C | −3.4°C | 21 mm | 23 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00054254; 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 Ignacio?
Normal highs sit between 65°F and 85°F in May, June, August and September. Of those, June has the fewest days with rain (3).
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 USC00054254.
When is the last frost in Ignacio?
In Ignacio, the last spring frost (32°F) comes after May 23 in half of years and after June 7 in one year in ten; the first autumn frost comes before September 29 in half of years and before September 18 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 231 year in 10 after June 7; 9 in 10 after May 9
- First autumn frost, half of years before
- September 291 year in 10 before September 18; 9 in 10 before October 11
NOAA puts the median frost-free season at 128 days, and the season without a hard freeze (28°F) at 153 days.
A hard freeze (28°F) comes after May 7 in half of springs and before October 8 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Ignacio in zone 6a in ZIP code 81137, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Ignacio's NOAA station is in zone 6a: the coldest night of a typical year reaches −8°F (17 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 USC00054254; 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 Ignacio?
In a normal year in Ignacio, 21 days a year reach 90°F, 202 nights fall to 32°F or colder and 78 days bring measurable precipitation.
- Days at 90°F or more
- 21a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 202a normal year
- Days that stay below freezing
- 17high of 32°F or less
- Days with 0.01 inch of precipitation
- 78a normal year
- Days with 1 inch of snow or more
- 10a normal year
The highest temperature in this station's record (since 2000) is 101°F, on June 5, 2000; the lowest is −21°F, on January 1, 2011.
The wettest calendar year on that record is 2015, with 17.14 in; the snowiest season is 2018–19, with 62.4 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00054254; records: ACIS (NOAA Regional Climate Centers), station USC00054254. Records use complete months only; a month missing more than three days is left out.
How sunny is Ignacio?
Over a year 78% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Ignacio, 5.0 kWh per square metre a day. June is the sunniest month (85%) and December the cloudiest (75%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 79% | 2.9 |
| February | 76% | 3.8 |
| March | 78% | 5.1 |
| April | 75% | 6.1 |
| May | 76% | 6.8 |
| June | 85% | 7.8 |
| July | 76% | 6.7 |
| August | 77% | 6.0 |
| September | 80% | 5.4 |
| October | 81% | 4.2 |
| November | 79% | 3.1 |
| December | 75% | 2.5 |
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 Ignacio need?
A normal year in Ignacio brings 6,967 heating degree days, 30% more than the median U.S. place (5,373), and 256 cooling degree days, 72% 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 2,011 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,255 | 0 |
| February | 976 | 0 |
| March | 839 | 0 |
| April | 609 | 0 |
| May | 352 | 2 |
| June | 97 | 32 |
| July | 7 | 130 |
| August | 22 | 84 |
| September | 174 | 9 |
| October | 547 | 0 |
| November | 875 | 0 |
| December | 1,215 | 0 |
| Year (annual) | 6,967 | 256 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00054254. 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 Ignacio been warmer than normal lately?
2025 averaged 48.7°F, 2.2°F above the 1991-2020 normal of 46.5°F. 4 of the 5 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2021 | 47.5°F | +1.0°F | 12.38 | 32.9 |
| 2022 | 47.1°F | +0.6°F | 14.09 | 27.1 |
| 2023 | 45.9°F | −0.6°F | 12.40 | 45.6 |
| 2024 | 48.4°F | +1.9°F | 14.26 | 23.9 |
| 2025 | 48.7°F | +2.2°F | 11.01 | 20.0 |
Source: observed years: ACIS, station USC00054254. A year counts only with all twelve months complete.
How does Ignacio's climate compare?
Ignacio is warmer than 47 of the other 124 places with their own NOAA record in Colorado, and wetter than 34. Across the 7,247 U.S. stations with normals, its annual mean of 46.5°F is warmer than 25%.
In the Köppen classification computed from these normals, Ignacio is Dsb: continental, dry-summer, warm summer. 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 Ignacio share this climate record?
4 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.
- Arboles, CO396 people · 8 mi SE
- Middle Mesa, NM212 people · 7 mi S
- Southern Ute, CO126 people · 3 mi W
- La Boca, NM79 people · 7 mi SW
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 Ignacio's climate
What is the coldest month in Ignacio?
January, with a normal high of 38°F and a normal low of 11°F. The warmest is July (86°F by day, 52°F at night).
Does it snow in Ignacio?
Yes: 34 inches in a normal year, falling on 24 days with 0.1 inch or more, the most in February (9.8 inches).
What is the rainiest month in Ignacio?
September, with 1.97 in of precipitation in a normal year; the driest is June with 0.40 in.
What plant hardiness zone is Ignacio in?
The USDA's 2023 map puts Ignacio in zone 6a in ZIP code 81137, the nearest ZIP area. By the same method at Ignacio's NOAA station, the coldest night of a typical year reaches −8°F (17 years, 1991-2020): zone 6a.
How late can frost come in Ignacio?
In half of years the last 32°F night comes after May 23; in one year in ten it comes after June 7. Waiting until June 7 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Colorado climateThe statewide normals and every place in the state
- Durango, CO13 miles from this station, 46.4°F a year
- Navajo Dam, NM20 miles from this station, 53.4°F a year
- Vallecito Reservoir, CO21 miles from this station, 45.0°F a year
- Lemon Dam, CO21 miles from this station, 42.9°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made