La Grange, Wyoming climate: Climate normals at a NOAA weather station
La Grange's normal year runs from 18°F December nights to 90°F July afternoons, with 16.0 inches of precipitation and 53 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 10.0°C, December lows of −8°C, July highs of 32°C, 406 mm of precipitation a year.
- NOAA stationLa Grange
- Station IDUSC00485260
- Location41.64°N 104.17°W
- Elevation4,590 ft (1,399 m)
On October 23, the normal high in La Grange is 62°F and the normal low 31°F, and the chance of measurable rain or snow is 18%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for La Grange.
- Jan 43° 19°
- Feb 45° 19°
- Mar 55° 26°
- Apr 63° 33°
- May 72° 41°
- Jun 83° 50°
- Jul 90° 57°
- Aug 88° 55°
- Sep 79° 46°
- Oct 65° 34°
- Nov 52° 25°
- Dec 42° 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 La Grange each month?
July is the warmest month, with normal highs of 90°F; December the coldest, with normal lows of 18°F. The most precipitation falls in May (2.24 in), the least in January (0.37 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 43°F | 19°F | 30.9°F | 0.37 | 6.2 | 4 | <1 | 29 | 9 h 30 min |
| February | 45°F | 19°F | 31.8°F | 0.67 | 6.6 | 5 | <1 | 26 | 10 h 30 min |
| March | 55°F | 26°F | 40.6°F | 1.05 | 10.4 | 6 | <1 | 25 | 11 h 50 min |
| April | 63°F | 33°F | 47.6°F | 1.88 | 7.6 | 8 | <1 | 15 | 13 h 20 min |
| May | 72°F | 41°F | 56.6°F | 2.24 | 0.3 | 10 | 1 | 3 | 14 h 30 min |
| June | 83°F | 50°F | 66.7°F | 2.14 | 0.0 | 10 | 6 | <1 | 15 h 10 min |
| July | 90°F | 57°F | 73.3°F | 1.57 | 0.0 | 8 | 18 | <1 | 15 h |
| August | 88°F | 55°F | 71.6°F | 1.89 | 0.0 | 8 | 13 | <1 | 13 h 50 min |
| September | 79°F | 46°F | 62.7°F | 1.46 | 0.3 | 6 | 3 | 2 | 12 h 30 min |
| October | 65°F | 34°F | 49.3°F | 1.36 | 5.0 | 6 | <1 | 14 | 11 h 10 min |
| November | 52°F | 25°F | 38.7°F | 0.57 | 6.4 | 5 | <1 | 25 | 9 h 50 min |
| December | 42°F | 18°F | 30.3°F | 0.77 | 10.6 | 5 | <1 | 29 | 9 h 10 min |
| Year (annual) | 65°F | 35°F | 50.0°F | 15.97 | 53.4 | 80 | 41 | 168 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 6°C | −7°C | −0.6°C | 9 mm | 16 cm |
| February | 7°C | −7°C | −0.1°C | 17 mm | 17 cm |
| March | 13°C | −3°C | 4.8°C | 27 mm | 26 cm |
| April | 17°C | 0°C | 8.7°C | 48 mm | 19 cm |
| May | 22°C | 5°C | 13.7°C | 57 mm | 1 cm |
| June | 28°C | 10°C | 19.3°C | 54 mm | 0 cm |
| July | 32°C | 14°C | 22.9°C | 40 mm | 0 cm |
| August | 31°C | 13°C | 22.0°C | 48 mm | 0 cm |
| September | 26°C | 8°C | 17.1°C | 37 mm | 1 cm |
| October | 18°C | 1°C | 9.6°C | 35 mm | 13 cm |
| November | 11°C | −4°C | 3.7°C | 14 mm | 16 cm |
| December | 6°C | −8°C | −0.9°C | 20 mm | 27 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00485260; 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 La Grange?
Normal highs sit between 65°F and 85°F in May, June, September and October. Of those, September has the fewest days with rain (6).
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 USC00485260.
When is the last frost at La Grange?
In La Grange, the last spring frost (32°F) comes after May 14 in half of years and after May 29 in one year in ten; the first autumn frost comes before October 1 in half of years and before September 15 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 141 year in 10 after May 29; 9 in 10 after May 1
- First autumn frost, half of years before
- October 11 year in 10 before September 15; 9 in 10 before October 11
NOAA puts the median frost-free season at 137 days, and the season without a hard freeze (28°F) at 157 days.
A hard freeze (28°F) comes after May 2 in half of springs and before October 9 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts La Grange in zone 5a in ZIP code 82217, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, the station is in zone 5a: the coldest night of a typical year reaches −16°F (17 complete years).
Frost dates for every NOAA station in Wyoming · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00485260; 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 at La Grange?
In a normal year in La Grange, 41 days a year reach 90°F (3 of them 100°F or more), 168 nights fall to 32°F or colder and 80 days bring measurable precipitation.
- Days at 90°F or more
- 41a normal year
- Days at 100°F or more
- 3a normal year
- Nights at 32°F or colder
- 168a normal year
- Days that stay below freezing
- 22high of 32°F or less
- Days with 0.01 inch of precipitation
- 80a normal year
- Days with 1 inch of snow or more
- 17a normal year
The highest temperature in this station's record (since 1948) is 112°F, on August 1, 2004; the lowest is −35°F, on December 22, 1989.
The wettest calendar year on that record is 1997, with 23.30 in; the snowiest season is 1983–84, with 132.5 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00485260; records: ACIS (NOAA Regional Climate Centers), station USC00485260. Records use complete months only; a month missing more than three days is left out.
How sunny is it at La Grange?
Over a year 78% of the sunlight that would reach the ground under clear skies gets through the clouds at La Grange, 4.6 kWh per square metre a day. August is the sunniest month (83%) and April the cloudiest (72%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 77% | 2.3 |
| February | 75% | 3.2 |
| March | 76% | 4.5 |
| April | 72% | 5.4 |
| May | 73% | 6.1 |
| June | 81% | 7.1 |
| July | 83% | 6.9 |
| August | 83% | 6.1 |
| September | 83% | 5.0 |
| October | 78% | 3.6 |
| November | 78% | 2.5 |
| December | 75% | 2.0 |
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 La Grange record?
A normal year at La Grange brings 6,104 heating degree days, 14% more than the median U.S. place (5,373), and 672 cooling degree days, 26% 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 2,741 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,056 | 0 |
| February | 931 | 0 |
| March | 757 | 0 |
| April | 521 | 1 |
| May | 276 | 14 |
| June | 61 | 112 |
| July | 7 | 264 |
| August | 13 | 219 |
| September | 133 | 63 |
| October | 487 | 2 |
| November | 788 | 0 |
| December | 1,077 | 0 |
| Year (annual) | 6,104 | 672 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00485260. 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 La Grange's climate compare?
La Grange is warmer than 71 of the 71 places with their own NOAA record in Wyoming, and wetter than 48. Across the 7,247 U.S. stations with normals, its annual mean of 50.0°F is warmer than 40%.
In the Köppen classification computed from these normals, La Grange 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.
Which places near La Grange share this climate record?
LaGrange 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.
- LaGrange, WY378 people · 0 mi E
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 La Grange's climate
What is the coldest month at La Grange?
December, with a normal high of 42°F and a normal low of 18°F. The warmest is July (90°F by day, 57°F at night).
Does it snow at La Grange?
Yes: 53 inches in a normal year, falling on 21 days with 0.1 inch or more, the most in December (10.6 inches).
What is the rainiest month at La Grange?
May, with 2.24 in of precipitation in a normal year; the driest is January with 0.37 in.
What plant hardiness zone is La Grange in?
The USDA's 2023 map puts La Grange in zone 5a in ZIP code 82217, the nearest ZIP area. By the same method at the station, the coldest night of a typical year reaches −16°F (17 years, 1991-2020): zone 5a.
How late can frost come at La Grange?
In half of years the last 32°F night comes after May 14; in one year in ten it comes after May 29. Waiting until May 29 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Wyoming climateThe statewide normals and every place in the state
- Harrisburg (12 mi WNW), NE11 miles from this station, 47.4°F a year
- Albin, WY17 miles from this station, 48.3°F a year
- Phillips, WY17 miles from this station, 47.9°F a year
- Yoder, WY22 miles from this station, 49.8°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made