Kaycee, Wyoming climate: Normal weather by month, frost dates and records
Kaycee's normal year runs from 10°F January nights to 88°F July afternoons, with 11.9 inches of precipitation and 41 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 7.3°C, January lows of −12°C, July highs of 31°C, 304 mm of precipitation a year.
- NOAA stationKaycee
- Station IDUSC00485055
- Location43.71°N 106.64°W
- Elevation4,660 ft (1,420 m)
- Population283
On October 23, the normal high in Kaycee is 56°F and the normal low 27°F, and the chance of measurable rain or snow is 13%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Kaycee.
- Jan 37° 10°
- Feb 39° 13°
- Mar 49° 21°
- Apr 56° 29°
- May 66° 39°
- Jun 78° 48°
- Jul 88° 55°
- Aug 86° 52°
- Sep 76° 42°
- Oct 60° 30°
- Nov 47° 19°
- Dec 37° 10°
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 Kaycee each month?
July is the warmest month, with normal highs of 88°F; January the coldest, with normal lows of 10°F. The most precipitation falls in May (2.75 in), the least in January (0.26 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 37°F | 10°F | 23.4°F | 0.26 | 5.6 | 3 | <1 | 31 | 9 h 20 min |
| February | 39°F | 13°F | 25.5°F | 0.41 | 8.9 | 3 | <1 | 28 | 10 h 30 min |
| March | 49°F | 21°F | 35.0°F | 0.67 | 6.5 | 4 | <1 | 28 | 11 h 50 min |
| April | 56°F | 29°F | 42.2°F | 1.50 | 3.8 | 7 | <1 | 20 | 13 h 20 min |
| May | 66°F | 39°F | 52.2°F | 2.75 | 0.6 | 8 | <1 | 6 | 14 h 40 min |
| June | 78°F | 48°F | 63.0°F | 1.63 | 0.1 | 7 | 5 | <1 | 15 h 30 min |
| July | 88°F | 55°F | 71.4°F | 1.16 | 0.0 | 5 | 16 | <1 | 15 h 10 min |
| August | 86°F | 52°F | 69.4°F | 0.70 | 0.0 | 3 | 14 | <1 | 14 h |
| September | 76°F | 42°F | 58.9°F | 1.03 | 0.3 | 4 | 3 | 3 | 12 h 30 min |
| October | 60°F | 30°F | 45.0°F | 1.04 | 2.3 | 5 | <1 | 18 | 11 h 10 min |
| November | 47°F | 19°F | 32.7°F | 0.46 | 5.8 | 3 | <1 | 28 | 9 h 40 min |
| December | 37°F | 10°F | 23.8°F | 0.34 | 6.8 | 3 | <1 | 31 | 9 h |
| Year (annual) | 60°F | 31°F | 45.2°F | 11.95 | 40.7 | 55 | 38 | 192 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 3°C | −12°C | −4.8°C | 7 mm | 14 cm |
| February | 4°C | −11°C | −3.6°C | 10 mm | 23 cm |
| March | 9°C | −6°C | 1.7°C | 17 mm | 17 cm |
| April | 13°C | −2°C | 5.7°C | 38 mm | 10 cm |
| May | 19°C | 4°C | 11.2°C | 70 mm | 2 cm |
| June | 26°C | 9°C | 17.2°C | 41 mm | 0 cm |
| July | 31°C | 13°C | 21.9°C | 29 mm | 0 cm |
| August | 30°C | 11°C | 20.8°C | 18 mm | 0 cm |
| September | 24°C | 6°C | 14.9°C | 26 mm | 1 cm |
| October | 15°C | −1°C | 7.2°C | 26 mm | 6 cm |
| November | 8°C | −7°C | 0.4°C | 12 mm | 15 cm |
| December | 3°C | −12°C | −4.6°C | 9 mm | 17 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00485055; 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 Kaycee?
Normal highs sit between 65°F and 85°F in May, June and September. Of those, September has the fewest days with rain (4).
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 USC00485055.
When is the last frost in Kaycee?
In Kaycee, the last spring frost (32°F) comes after May 18 in half of years and after May 31 in one year in ten; the first autumn frost comes before September 25 in half of years and before September 11 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 181 year in 10 after May 31; 9 in 10 after May 5
- First autumn frost, half of years before
- September 251 year in 10 before September 11; 9 in 10 before October 9
NOAA puts the median frost-free season at 129 days, and the season without a hard freeze (28°F) at 152 days.
A hard freeze (28°F) comes after May 6 in half of springs and before October 5 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Kaycee in zone 5a in ZIP code 82639, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Kaycee's NOAA station is in zone 4b: the coldest night of a typical year reaches −21°F (26 complete years); the map interpolates between stations and terrain, so the station and the ZIP area can differ by half a zone.
Frost dates for every NOAA station in Wyoming · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00485055; 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 Kaycee?
In a normal year in Kaycee, 38 days a year reach 90°F (2 of them 100°F or more), 192 nights fall to 32°F or colder and 55 days bring measurable precipitation.
- Days at 90°F or more
- 38a normal year
- Days at 100°F or more
- 2a normal year
- Nights at 32°F or colder
- 192a normal year
- Days that stay below freezing
- 37high of 32°F or less
- Days with 0.01 inch of precipitation
- 55a normal year
- Days with 1 inch of snow or more
- 15a normal year
The highest temperature in this station's record (since 1900) is 107°F, on August 5, 1979; the lowest is −51°F, on February 12, 1905.
The wettest calendar year on that record is 1998, with 20.30 in; the snowiest season is 1949–50, with 69.6 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00485055; records: ACIS (NOAA Regional Climate Centers), station USC00485055. Records use complete months only; a month missing more than three days is left out.
How sunny is Kaycee?
Over a year 79% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Kaycee, 4.5 kWh per square metre a day. July is the sunniest month (87%) and December the cloudiest (70%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 75% | 2.0 |
| February | 71% | 2.8 |
| March | 73% | 4.1 |
| April | 72% | 5.3 |
| May | 74% | 6.2 |
| June | 84% | 7.4 |
| July | 87% | 7.3 |
| August | 87% | 6.4 |
| September | 84% | 5.0 |
| October | 77% | 3.3 |
| November | 74% | 2.2 |
| December | 70% | 1.6 |
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 Kaycee need?
A normal year in Kaycee brings 7,671 heating degree days, 43% more than the median U.S. place (5,373), and 492 cooling degree days, 46% 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 2,204 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,290 | 0 |
| February | 1,104 | 0 |
| March | 930 | 0 |
| April | 684 | 0 |
| May | 403 | 6 |
| June | 126 | 66 |
| July | 20 | 220 |
| August | 33 | 170 |
| September | 215 | 30 |
| October | 620 | 1 |
| November | 969 | 0 |
| December | 1,277 | 0 |
| Year (annual) | 7,671 | 492 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00485055. 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 Kaycee been warmer than normal lately?
2025 averaged 47.4°F, 2.2°F above the 1991-2020 normal of 45.2°F. 4 of the 5 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2021 | 46.9°F | +1.7°F | 8.98 | 55.6 |
| 2022 | 44.8°F | −0.4°F | 11.48 | 48.2 |
| 2023 | 46.0°F | +0.8°F | 15.62 | 44.5 |
| 2024 | 47.9°F | +2.7°F | 9.00 | 24.5 |
| 2025 | 47.4°F | +2.2°F | 12.00 | 26.0 |
Over 64 complete years from 1949 to 2025, the station's annual mean temperature rose at a fitted 4.8°F per century (+0.27°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00485055; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Kaycee's climate compare?
Kaycee is warmer than 46 of the other 70 places with their own NOAA record in Wyoming, and wetter than 31. Across the 7,247 U.S. stations with normals, its annual mean of 45.2°F is warmer than 20%.
In the Köppen classification computed from these normals, Kaycee 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 Kaycee's climate
What is the coldest month in Kaycee?
January, with a normal high of 37°F and a normal low of 10°F. The warmest is July (88°F by day, 55°F at night).
Does it snow in Kaycee?
Yes: 41 inches in a normal year, falling on 17 days with 0.1 inch or more, the most in February (8.9 inches).
What is the rainiest month in Kaycee?
May, with 2.75 in of precipitation in a normal year; the driest is January with 0.26 in.
What plant hardiness zone is Kaycee in?
The USDA's 2023 map puts Kaycee in zone 5a in ZIP code 82639, the nearest ZIP area. By the same method at Kaycee's NOAA station, the coldest night of a typical year reaches −21°F (26 years, 1991-2020): zone 4b.
How late can frost come in Kaycee?
In half of years the last 32°F night comes after May 18; in one year in ten it comes after May 31. Waiting until May 31 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Wyoming climateThe statewide normals and every place in the state
- Midwest, WY27 miles from this station, 45.0°F a year
- Billy Creek, WY29 miles from this station, 45.5°F a year
- Tensleep (16 mi SSE), WY37 miles from this station, 42.1°F a year
- Tensleep (4 mi NE), WY44 miles from this station, 47.7°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made