Walsh, Colorado climate: Normal weather by month, frost dates and records
Walsh's normal year runs from 19°F January nights to 93°F July afternoons, with 19.5 inches of precipitation and 23 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 12.3°C, January lows of −7°C, July highs of 34°C, 496 mm of precipitation a year.
- NOAA stationWalsh (1 mi W)
- Station IDUSC00058793
- Location37.38°N 102.30°W
- Elevation3,978 ft (1,213 m)
- Population516
On October 23, the normal high in Walsh is 67°F and the normal low 36°F, and the chance of measurable rain or snow is 16%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Walsh.
- Jan 46° 19°
- Feb 50° 21°
- Mar 60° 29°
- Apr 68° 37°
- May 78° 47°
- Jun 88° 58°
- Jul 93° 63°
- Aug 90° 61°
- Sep 83° 53°
- Oct 70° 39°
- Nov 57° 28°
- 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 Walsh each month?
July is the warmest month, with normal highs of 93°F; January the coldest, with normal lows of 19°F. The most precipitation falls in July (3.57 in), the least in February (0.40 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 46°F | 19°F | 32.6°F | 0.46 | 4.5 | 3 | <1 | 30 | 9 h 50 min |
| February | 50°F | 21°F | 35.7°F | 0.40 | 3.4 | 3 | <1 | 25 | 10 h 50 min |
| March | 60°F | 29°F | 44.1°F | 1.06 | 4.2 | 5 | <1 | 21 | 11 h 50 min |
| April | 68°F | 37°F | 52.2°F | 1.65 | 1.8 | 7 | <1 | 9 | 13 h 10 min |
| May | 78°F | 47°F | 62.3°F | 2.12 | 0.2 | 8 | 4 | 1 | 14 h 10 min |
| June | 88°F | 58°F | 73.0°F | 2.60 | 0.0 | 8 | 15 | <1 | 14 h 40 min |
| July | 93°F | 63°F | 77.7°F | 3.57 | 0.0 | 9 | 22 | <1 | 14 h 30 min |
| August | 90°F | 61°F | 75.3°F | 3.26 | 0.0 | 8 | 17 | <1 | 13 h 40 min |
| September | 83°F | 53°F | 67.7°F | 1.43 | 0.0 | 5 | 8 | <1 | 12 h 30 min |
| October | 70°F | 39°F | 54.5°F | 1.64 | 1.0 | 5 | 1 | 7 | 11 h 20 min |
| November | 57°F | 28°F | 42.3°F | 0.58 | 2.6 | 4 | <1 | 21 | 10 h 10 min |
| December | 47°F | 20°F | 33.1°F | 0.76 | 5.3 | 4 | <1 | 30 | 9 h 40 min |
| Year (annual) | 69°F | 40°F | 54.2°F | 19.53 | 23.0 | 70 | 69 | 143 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 8°C | −7°C | 0.3°C | 12 mm | 11 cm |
| February | 10°C | −6°C | 2.1°C | 10 mm | 9 cm |
| March | 15°C | −2°C | 6.7°C | 27 mm | 11 cm |
| April | 20°C | 3°C | 11.2°C | 42 mm | 5 cm |
| May | 25°C | 8°C | 16.8°C | 54 mm | 1 cm |
| June | 31°C | 14°C | 22.8°C | 66 mm | 0 cm |
| July | 34°C | 17°C | 25.4°C | 91 mm | 0 cm |
| August | 32°C | 16°C | 24.1°C | 83 mm | 0 cm |
| September | 28°C | 12°C | 19.8°C | 36 mm | 0 cm |
| October | 21°C | 4°C | 12.5°C | 42 mm | 3 cm |
| November | 14°C | −2°C | 5.7°C | 15 mm | 7 cm |
| December | 8°C | −7°C | 0.6°C | 19 mm | 13 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00058793; 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 Walsh?
Normal highs sit between 65°F and 85°F in April, May, September and October. Of those, September has the fewest days with rain (5).
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 USC00058793.
When is the last frost in Walsh?
In Walsh, the last spring frost (32°F) comes after April 30 in half of years and after May 12 in one year in ten; the first autumn frost comes before October 14 in half of years and before October 1 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
- April 301 year in 10 after May 12; 9 in 10 after April 17
- First autumn frost, half of years before
- October 141 year in 10 before October 1; 9 in 10 before October 24
NOAA puts the median frost-free season at 166 days, and the season without a hard freeze (28°F) at 185 days.
A hard freeze (28°F) comes after April 19 in half of springs and before October 22 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Walsh in zone 6b in ZIP code 81090, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Walsh's NOAA station is in zone 6b: the coldest night of a typical year reaches −5°F (30 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 USC00058793; 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 Walsh?
In a normal year in Walsh, 69 days a year reach 90°F (12 of them 100°F or more), 143 nights fall to 32°F or colder and 70 days bring measurable precipitation.
- Days at 90°F or more
- 69a normal year
- Days at 100°F or more
- 12a normal year
- Nights at 32°F or colder
- 143a normal year
- Days that stay below freezing
- 19high of 32°F or less
- Days with 0.01 inch of precipitation
- 70a normal year
- Days with 1 inch of snow or more
- 8a normal year
The highest temperature in this station's record (since 1967) is 110°F, on July 28, 2026; the lowest is −25°F, on January 18, 1984.
The wettest calendar year on that record is 2017, with 29.22 in; the snowiest season is 1972–73, with 50.1 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00058793; records: ACIS (NOAA Regional Climate Centers), station USC00058793. Records use complete months only; a month missing more than three days is left out.
How sunny is Walsh?
Over a year 85% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Walsh, 5.2 kWh per square metre a day. July is the sunniest month (90%) and February the cloudiest (77%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 81% | 2.8 |
| February | 77% | 3.6 |
| March | 82% | 5.1 |
| April | 81% | 6.2 |
| May | 84% | 7.1 |
| June | 88% | 7.6 |
| July | 90% | 7.5 |
| August | 89% | 6.6 |
| September | 88% | 5.6 |
| October | 85% | 4.2 |
| November | 84% | 3.1 |
| December | 80% | 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 Walsh need?
A normal year in Walsh brings 5,114 heating degree days, 5% fewer than the median U.S. place (5,373), and 1,215 cooling degree days, 34% more 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 3,740 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,006 | 0 |
| February | 819 | 0 |
| March | 650 | 0 |
| April | 392 | 7 |
| May | 151 | 68 |
| June | 17 | 256 |
| July | 2 | 396 |
| August | 5 | 325 |
| September | 66 | 147 |
| October | 340 | 16 |
| November | 680 | 0 |
| December | 987 | 0 |
| Year (annual) | 5,114 | 1,215 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00058793. 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 Walsh been warmer than normal lately?
2025 averaged 56.0°F, 1.8°F above the 1991-2020 normal of 54.2°F. 5 of the 5 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2021 | 55.3°F | +1.0°F | 17.44 | 10.1 |
| 2022 | 54.9°F | +0.7°F | 13.77 | 23.5 |
| 2023 | 54.9°F | +0.7°F | 27.95 | 14.9 |
| 2024 | 56.6°F | +2.4°F | 23.40 | 15.5 |
| 2025 | 56.0°F | +1.8°F | 20.52 | 12.4 |
Over 43 complete years from 1968 to 2025, the station's annual mean temperature rose at a fitted 4.1°F per century (+0.23°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00058793; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Walsh's climate compare?
Walsh is warmer than 120 of the other 124 places with their own NOAA record in Colorado, and wetter than 105. Across the 7,247 U.S. stations with normals, its annual mean of 54.2°F is warmer than 58%.
In the Köppen classification computed from these normals, Walsh 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 Walsh share this climate record?
2 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.
- Vilas, CO98 people · 8 mi W
- Two Buttes, CO32 people · 13 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.
Questions about Walsh's climate
What is the coldest month in Walsh?
January, with a normal high of 46°F and a normal low of 19°F. The warmest is July (93°F by day, 63°F at night).
Does it snow in Walsh?
Yes: 23 inches in a normal year, falling on 13 days with 0.1 inch or more, the most in December (5.3 inches).
What is the rainiest month in Walsh?
July, with 3.57 in of precipitation in a normal year; the driest is February with 0.40 in.
What plant hardiness zone is Walsh in?
The USDA's 2023 map puts Walsh in zone 6b in ZIP code 81090, the nearest ZIP area. By the same method at Walsh's NOAA station, the coldest night of a typical year reaches −5°F (30 years, 1991-2020): zone 6b.
How late can frost come in Walsh?
In half of years the last 32°F night comes after April 30; in one year in ten it comes after May 12. Waiting until May 12 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Colorado climateThe statewide normals and every place in the state
- Springfield, CO19 miles from this station, 52.7°F a year
- Richfield, KS29 miles from this station, 55.5°F a year
- Campo, CO29 miles from this station, 54.3°F a year
- Johnson, KS33 miles from this station, 55.8°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made