Grants, New Mexico climate: Normal weather by month, frost dates and records
Grants's normal year runs from 13°F December nights to 88°F July afternoons. (NOAA 1991-2020 normals)
In metric: a yearly mean of 10.1°C, December lows of −10°C, July highs of 31°C.
- NOAA stationGrants Milan Municipal Airport
- Station IDUSW00093057
- Location35.17°N 107.90°W
- Elevation6,520 ft (1,987 m)
- Population8,880
On October 23, the normal high in Grants is 66°F and the normal low 29°F.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Grants.
- Jan 47° 15°
- Feb 52° 19°
- Mar 60° 23°
- Apr 67° 30°
- May 76° 37°
- Jun 87° 47°
- Jul 88° 54°
- Aug 86° 52°
- Sep 80° 44°
- Oct 69° 32°
- Nov 57° 21°
- Dec 47° 13°
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 Grants each month?
July is the warmest month, with normal highs of 88°F; December the coldest, with normal lows of 13°F.
| Month | High | Low | Mean | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|
| January | 47°F | 15°F | 30.7°F | – | <1 | 31 | 10 h |
| February | 52°F | 19°F | 35.4°F | – | <1 | 27 | 10 h 50 min |
| March | 60°F | 23°F | 41.6°F | – | <1 | 28 | 11 h 50 min |
| April | 67°F | 30°F | 48.3°F | – | <1 | 20 | 13 h |
| May | 76°F | 37°F | 56.7°F | – | 1 | 8 | 14 h |
| June | 87°F | 47°F | 66.7°F | – | 11 | 1 | 14 h 30 min |
| July | 88°F | 54°F | 71.2°F | – | 13 | <1 | 14 h 20 min |
| August | 86°F | 52°F | 68.5°F | – | 7 | <1 | 13 h 30 min |
| September | 80°F | 44°F | 62.1°F | – | 1 | 2 | 12 h 30 min |
| October | 69°F | 32°F | 50.7°F | – | <1 | 18 | 11 h 20 min |
| November | 57°F | 21°F | 38.7°F | – | <1 | 28 | 10 h 20 min |
| December | 47°F | 13°F | 30.1°F | – | <1 | 30 | 9 h 50 min |
| Year (annual) | 68°F | 32°F | 50.1°F | – | 31 | 192 |
The same normals in °C and millimetres
| Month | High | Low | Mean |
|---|---|---|---|
| January | 8°C | −10°C | −0.7°C |
| February | 11°C | −7°C | 1.9°C |
| March | 16°C | −5°C | 5.3°C |
| April | 19°C | −1°C | 9.1°C |
| May | 24°C | 3°C | 13.7°C |
| June | 30°C | 8°C | 19.3°C |
| July | 31°C | 12°C | 21.8°C |
| August | 30°C | 11°C | 20.3°C |
| September | 27°C | 7°C | 16.7°C |
| October | 21°C | 0°C | 10.4°C |
| November | 14°C | −6°C | 3.7°C |
| December | 8°C | −10°C | −1.1°C |
NOAA publishes no 1991-2020 snowfall normal for this station. Grants's own co-op station Grants Airport does: 8 inches of snow in a normal year (see the other stations below).
Source: NOAA NCEI 1991-2020 monthly normals, station USW00093057; 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 Grants?
Normal highs sit between 65°F and 85°F in April, May, 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 USW00093057.
When is the last frost in Grants?
In Grants, the last spring frost (32°F) comes after May 24 in half of years and after June 9 in one year in ten; the first autumn frost comes before October 1 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 241 year in 10 after June 9; 9 in 10 after May 7
- First autumn frost, half of years before
- October 11 year in 10 before September 19; 9 in 10 before October 13
NOAA puts the median frost-free season at 129 days, and the season without a hard freeze (28°F) at 153 days.
A hard freeze (28°F) comes after May 9 in half of springs and before October 12 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Grants in zone 6a in ZIP code 87021, the nearest ZIP area.
Frost dates for every NOAA station in New Mexico · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USW00093057; 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 Grants?
In a normal year in Grants, 31 days a year reach 90°F and 192 nights fall to 32°F or colder.
- Days at 90°F or more
- 31a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 192a normal year
- Days that stay below freezing
- 7high of 32°F or less
Source: NOAA NCEI 1991-2020 annual normals, station USW00093057.
How sunny is Grants?
Over a year 86% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Grants, 5.5 kWh per square metre a day. June is the sunniest month (90%) and December the cloudiest (80%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 81% | 3.2 |
| February | 81% | 4.1 |
| March | 85% | 5.6 |
| April | 86% | 6.9 |
| May | 87% | 7.7 |
| June | 90% | 8.1 |
| July | 84% | 7.2 |
| August | 84% | 6.6 |
| September | 87% | 5.8 |
| October | 89% | 4.8 |
| November | 86% | 3.5 |
| December | 80% | 2.8 |
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 Grants need?
A normal year in Grants brings 5,863 heating degree days, 9% more than the median U.S. place (5,373), and 435 cooling degree days, 52% 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 2,475 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,065 | 0 |
| February | 827 | 0 |
| March | 725 | 0 |
| April | 501 | 0 |
| May | 265 | 7 |
| June | 43 | 94 |
| July | 1 | 193 |
| August | 9 | 117 |
| September | 108 | 23 |
| October | 445 | 0 |
| November | 791 | 0 |
| December | 1,083 | 0 |
| Year (annual) | 5,863 | 435 |
Source: NOAA NCEI 1991-2020 monthly normals, station USW00093057. 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 Grants been warmer than normal lately?
2025 averaged 52.9°F, 2.8°F above the 1991-2020 normal of 50.1°F.
| Year | Mean | Against normal |
|---|---|---|
| 2025 | 52.9°F | +2.8°F |
Source: observed years: ACIS, station USW00093057. A year counts only with all twelve months complete.
How does Grants's climate compare?
Grants is warmer than 25 of the other 97 places with their own NOAA record in New Mexico. Across the 7,247 U.S. stations with normals, its annual mean of 50.1°F is warmer than 40%.
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers.
Which places near Grants share this climate record?
9 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.
- Milan, NM2,472 people · 2 mi N
- San Mateo, NM726 people · 19 mi NE
- San Rafael, NM620 people · 5 mi S
- Mount Taylor, NM482 people · 6 mi SE
- Lobo Canyon, NM431 people · 11 mi E
- Broadview, NM386 people · 4 mi N
- Anzac Village, NM89 people · 11 mi SE
- Golden Acres, NM66 people · 3 mi N
- Bluewater Village, NM30 people · 9 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.
What do Grants's other NOAA stations record?
One more NOAA station keeps 1991-2020 normals in or near Grants. This page uses Grants Milan Municipal Airport; the other differs by site and elevation:
| Station | From this station | Elevation | Year | Jan low | Jul high | Precip. | Snow | Last frost |
|---|---|---|---|---|---|---|---|---|
| Grants Airport USC00293682 | in town | 6,520 ft | 52.1°F | 15°F | 92°F | 9.7 | 8 | May 17 |
Source: NOAA NCEI 1991-2020 normals for each station. Last frost: the median last spring date of 32°F.
Questions about Grants's climate
What is the coldest month in Grants?
December, with a normal high of 47°F and a normal low of 13°F. The warmest is July (88°F by day, 54°F at night).
Does it snow in Grants?
Yes. NOAA publishes no 1991-2020 snowfall normal for Grants's NOAA station; Grants's own co-op station Grants Airport records 8 inches of snow in a normal year.
What plant hardiness zone is Grants in?
The USDA's 2023 map puts Grants in zone 6a in ZIP code 87021, the nearest ZIP area.
How late can frost come in Grants?
In half of years the last 32°F night comes after May 24; in one year in ten it comes after June 9. Waiting until June 9 leaves about a one-in-ten chance of a later frost.
Nearby and next
- New Mexico climateThe statewide normals and every place in the state
- Thoreau (12 mi SE), NM17 miles from this station, 49.7°F a year
- Cubero, NM22 miles from this station, 52.7°F a year
- El Morro National Mon, NM27 miles from this station, 47.7°F a year
- McGaffey, NM33 miles from this station, 46.3°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made