Grenville, New Mexico climate: Normal weather by month, frost dates and records
Grenville's normal year runs from 20°F January nights to 86°F July afternoons, with 16.6 inches of precipitation and 18 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 11.1°C, January lows of −7°C, July highs of 30°C, 422 mm of precipitation a year.
- NOAA stationGrenville
- Station IDUSC00293706
- Location36.59°N 103.62°W
- Elevation6,002 ft (1,829 m)
- Population24
On October 22, the normal high in Grenville is 66°F and the normal low 36°F, and the chance of measurable rain or snow is 10%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Grenville.
- Jan 47° 20°
- Feb 50° 21°
- Mar 58° 28°
- Apr 65° 34°
- May 74° 44°
- Jun 83° 53°
- Jul 86° 58°
- Aug 84° 57°
- Sep 78° 50°
- Oct 68° 38°
- Nov 56° 27°
- Dec 47° 20°
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 Grenville each month?
July is the warmest month, with normal highs of 86°F; January the coldest, with normal lows of 20°F. The most precipitation falls in July (3.64 in), the least in January (0.38 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 47°F | 20°F | 33.5°F | 0.38 | 3.2 | 2 | <1 | 29 | 9 h 50 min |
| February | 50°F | 21°F | 35.5°F | 0.40 | 3.3 | 2 | <1 | 26 | 10 h 50 min |
| March | 58°F | 28°F | 42.9°F | 0.80 | 2.1 | 3 | <1 | 23 | 11 h 50 min |
| April | 65°F | 34°F | 49.6°F | 1.07 | 1.3 | 5 | <1 | 13 | 13 h 10 min |
| May | 74°F | 44°F | 58.7°F | 1.65 | 0.0 | 6 | 1 | 2 | 14 h 10 min |
| June | 83°F | 53°F | 68.2°F | 1.88 | 0.0 | 7 | 8 | <1 | 14 h 40 min |
| July | 86°F | 58°F | 72.1°F | 3.64 | 0.0 | 9 | 13 | <1 | 14 h 30 min |
| August | 84°F | 57°F | 70.1°F | 3.15 | 0.0 | 9 | 7 | <1 | 13 h 40 min |
| September | 78°F | 50°F | 63.9°F | 1.77 | 0.0 | 5 | 2 | <1 | 12 h 30 min |
| October | 68°F | 38°F | 52.9°F | 0.99 | 0.7 | 3 | <1 | 8 | 11 h 20 min |
| November | 56°F | 27°F | 41.8°F | 0.41 | 2.2 | 3 | <1 | 22 | 10 h 20 min |
| December | 47°F | 20°F | 33.5°F | 0.46 | 5.1 | 2 | <1 | 30 | 9 h 40 min |
| Year (annual) | 66°F | 37°F | 51.9°F | 16.60 | 17.9 | 56 | 30 | 153 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 8°C | −7°C | 0.8°C | 10 mm | 8 cm |
| February | 10°C | −6°C | 1.9°C | 10 mm | 8 cm |
| March | 15°C | −2°C | 6.1°C | 20 mm | 5 cm |
| April | 18°C | 1°C | 9.8°C | 27 mm | 3 cm |
| May | 23°C | 6°C | 14.8°C | 42 mm | 0 cm |
| June | 29°C | 12°C | 20.1°C | 48 mm | 0 cm |
| July | 30°C | 14°C | 22.3°C | 92 mm | 0 cm |
| August | 29°C | 14°C | 21.2°C | 80 mm | 0 cm |
| September | 26°C | 10°C | 17.7°C | 45 mm | 0 cm |
| October | 20°C | 3°C | 11.6°C | 25 mm | 2 cm |
| November | 13°C | −3°C | 5.4°C | 10 mm | 6 cm |
| December | 8°C | −7°C | 0.8°C | 12 mm | 13 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00293706; 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 Grenville?
Normal highs sit between 65°F and 85°F in April, May, June, August, September and October. Of those, October 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 USC00293706.
When is the last frost in Grenville?
In Grenville, the last spring frost (32°F) comes after May 5 in half of years and after May 20 in one year in ten; the first autumn frost comes before October 9 in half of years and before September 27 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 51 year in 10 after May 20; 9 in 10 after April 23
- First autumn frost, half of years before
- October 91 year in 10 before September 27; 9 in 10 before October 20
NOAA puts the median frost-free season at 156 days, and the season without a hard freeze (28°F) at 173 days.
A hard freeze (28°F) comes after April 26 in half of springs and before October 17 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Grenville in zone 6b in ZIP code 88424, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Grenville's NOAA station is in zone 6b: the coldest night of a typical year reaches −4°F (20 complete years).
Frost dates for every NOAA station in New Mexico · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00293706; 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 Grenville?
In a normal year in Grenville, 30 days a year reach 90°F, 153 nights fall to 32°F or colder and 56 days bring measurable precipitation.
- Days at 90°F or more
- 30a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 153a normal year
- Days that stay below freezing
- 12high of 32°F or less
- Days with 0.01 inch of precipitation
- 56a normal year
- Days with 1 inch of snow or more
- 5a normal year
The highest temperature in this station's record (since 1940) is 104°F, on June 29, 1968; the lowest is −26°F, on January 13, 1963.
The wettest calendar year on that record is 1941, with 37.04 in; the snowiest season is 1972–73, with 63.5 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00293706; records: ACIS (NOAA Regional Climate Centers), station USC00293706. Records use complete months only; a month missing more than three days is left out.
How sunny is Grenville?
Over a year 85% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Grenville, 5.3 kWh per square metre a day. September is the sunniest month (88%) and December the cloudiest (80%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 83% | 3.1 |
| February | 81% | 4.0 |
| March | 82% | 5.3 |
| April | 83% | 6.5 |
| May | 85% | 7.3 |
| June | 88% | 7.7 |
| July | 87% | 7.3 |
| August | 87% | 6.6 |
| September | 88% | 5.7 |
| October | 86% | 4.5 |
| November | 86% | 3.4 |
| December | 80% | 2.7 |
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 Grenville need?
A normal year in Grenville brings 5,364 heating degree days, 0% fewer than the median U.S. place (5,373), and 607 cooling degree days, 33% 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 2,874 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 978 | 0 |
| February | 827 | 0 |
| March | 685 | 0 |
| April | 463 | 1 |
| May | 220 | 23 |
| June | 34 | 130 |
| July | 5 | 223 |
| August | 10 | 168 |
| September | 91 | 59 |
| October | 378 | 3 |
| November | 696 | 0 |
| December | 978 | 0 |
| Year (annual) | 5,364 | 607 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00293706. 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 Grenville been warmer than normal lately?
Over 45 complete years from 1941 to 2019, the station's annual mean temperature rose at a fitted 3.3°F per century (+0.18°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Grenville's climate compare?
Grenville is warmer than 35 of the other 97 places with their own NOAA record in New Mexico, and wetter than 74. Across the 7,247 U.S. stations with normals, its annual mean of 51.9°F is warmer than 49%.
In the Köppen classification computed from these normals, Grenville 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 Grenville's climate
What is the coldest month in Grenville?
January, with a normal high of 47°F and a normal low of 20°F. The warmest is July (86°F by day, 58°F at night).
Does it snow in Grenville?
Yes: 18 inches in a normal year, falling on 7 days with 0.1 inch or more, the most in December (5.1 inches).
What is the rainiest month in Grenville?
July, with 3.64 in of precipitation in a normal year; the driest is January with 0.38 in.
What plant hardiness zone is Grenville in?
The USDA's 2023 map puts Grenville in zone 6b in ZIP code 88424, the nearest ZIP area. By the same method at Grenville's NOAA station, the coldest night of a typical year reaches −4°F (20 years, 1991-2020): zone 6b.
How late can frost come in Grenville?
In half of years the last 32°F night comes after May 5; in one year in ten it comes after May 20. Waiting until May 20 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
- Pasamonte, NM22 miles from this station, 50.9°F a year
- Capulin, NM23 miles from this station, 49.4°F a year
- Clayton, NM28 miles from this station, 54.3°F a year
- Kim (10 mi SSE), CO40 miles from this station, 54.2°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made