Sybille Research Unit, Wyoming climate: Climate normals at a NOAA weather station
Sybille Research Unit's normal year runs from 16°F January nights to 83°F July afternoons, with 15.2 inches of precipitation and 70 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 7.2°C, January lows of −9°C, July highs of 28°C, 387 mm of precipitation a year.
- NOAA stationSybille Research Unit
- Station IDUSC00488808
- Location41.76°N 105.38°W
- Elevation6,086 ft (1,855 m)
On October 23, the normal high in Sybille Research Unit is 55°F and the normal low 30°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 Sybille Research Unit.
- Jan 35° 16°
- Feb 38° 17°
- Mar 47° 24°
- Apr 54° 30°
- May 63° 38°
- Jun 76° 47°
- Jul 83° 54°
- Aug 81° 52°
- Sep 72° 44°
- Oct 59° 32°
- Nov 45° 23°
- Dec 35° 17°
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 Sybille Research Unit each month?
July is the warmest month, with normal highs of 83°F; January the coldest, with normal lows of 16°F. The most precipitation falls in May (2.54 in), the least in January (0.49 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 35°F | 16°F | 25.8°F | 0.49 | 8.7 | 4 | <1 | 30 | 9 h 30 min |
| February | 38°F | 17°F | 27.3°F | 0.67 | 10.4 | 5 | <1 | 26 | 10 h 30 min |
| March | 47°F | 24°F | 35.1°F | 0.89 | 8.6 | 6 | <1 | 26 | 11 h 50 min |
| April | 54°F | 30°F | 41.8°F | 1.77 | 9.8 | 9 | <1 | 20 | 13 h 20 min |
| May | 63°F | 38°F | 50.8°F | 2.54 | 3.5 | 11 | <1 | 8 | 14 h 30 min |
| June | 76°F | 47°F | 61.2°F | 2.02 | 0.0 | 8 | 1 | <1 | 15 h 10 min |
| July | 83°F | 54°F | 68.5°F | 1.51 | 0.0 | 7 | 6 | <1 | 15 h |
| August | 81°F | 52°F | 66.5°F | 1.28 | 0.0 | 7 | 3 | <1 | 13 h 50 min |
| September | 72°F | 44°F | 57.8°F | 1.31 | 0.7 | 6 | 1 | 3 | 12 h 30 min |
| October | 59°F | 32°F | 45.4°F | 1.30 | 7.0 | 6 | <1 | 17 | 11 h 10 min |
| November | 45°F | 23°F | 34.0°F | 0.79 | 8.7 | 5 | <1 | 25 | 9 h 50 min |
| December | 35°F | 17°F | 26.0°F | 0.65 | 12.6 | 5 | <1 | 29 | 9 h 10 min |
| Year (annual) | 57°F | 33°F | 45.0°F | 15.22 | 70.0 | 79 | 11 | 184 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 2°C | −9°C | −3.4°C | 12 mm | 22 cm |
| February | 3°C | −8°C | −2.6°C | 17 mm | 26 cm |
| March | 8°C | −5°C | 1.7°C | 23 mm | 22 cm |
| April | 12°C | −1°C | 5.4°C | 45 mm | 25 cm |
| May | 17°C | 4°C | 10.4°C | 65 mm | 9 cm |
| June | 24°C | 8°C | 16.2°C | 51 mm | 0 cm |
| July | 28°C | 12°C | 20.3°C | 38 mm | 0 cm |
| August | 27°C | 11°C | 19.2°C | 33 mm | 0 cm |
| September | 22°C | 6°C | 14.3°C | 33 mm | 2 cm |
| October | 15°C | 0°C | 7.4°C | 33 mm | 18 cm |
| November | 7°C | −5°C | 1.1°C | 20 mm | 22 cm |
| December | 2°C | −8°C | −3.3°C | 17 mm | 32 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00488808; 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 Sybille Research Unit?
Normal highs sit between 65°F and 85°F in June, July, August and September. 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 USC00488808.
When is the last frost at Sybille Research Unit?
In Sybille Research Unit, the last spring frost (32°F) comes after May 22 in half of years and after June 5 in one year in ten; the first autumn frost comes before September 24 in half of years and before September 9 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 221 year in 10 after June 5; 9 in 10 after May 8
- First autumn frost, half of years before
- September 241 year in 10 before September 9; 9 in 10 before October 7
NOAA puts the median frost-free season at 125 days, and the season without a hard freeze (28°F) at 149 days.
A hard freeze (28°F) comes after May 7 in half of springs and before October 4 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Sybille Research Unit in zone 5a in ZIP code 82201, 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 5b: the coldest night of a typical year reaches −12°F (17 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 USC00488808; 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 Sybille Research Unit?
In a normal year in Sybille Research Unit, 11 days a year reach 90°F, 184 nights fall to 32°F or colder and 79 days bring measurable precipitation.
- Days at 90°F or more
- 11a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 184a normal year
- Days that stay below freezing
- 41high of 32°F or less
- Days with 0.01 inch of precipitation
- 79a normal year
- Days with 1 inch of snow or more
- 20a normal year
The highest temperature in this station's record (since 1964) is 99°F, on July 8, 1989; the lowest is −30°F, on December 23, 1983.
The wettest calendar year on that record is 1967, with 22.66 in; the snowiest season is 1979–80, with 140.8 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00488808; records: ACIS (NOAA Regional Climate Centers), station USC00488808. Records use complete months only; a month missing more than three days is left out.
How sunny is it at Sybille Research Unit?
Over a year 77% of the sunlight that would reach the ground under clear skies gets through the clouds at Sybille Research Unit, 4.6 kWh per square metre a day. September is the sunniest month (82%) and April the cloudiest (71%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 77% | 2.4 |
| February | 76% | 3.3 |
| March | 75% | 4.5 |
| April | 71% | 5.3 |
| May | 72% | 6.2 |
| June | 81% | 7.2 |
| July | 81% | 6.9 |
| August | 81% | 6.0 |
| September | 82% | 5.1 |
| October | 77% | 3.6 |
| November | 76% | 2.5 |
| December | 73% | 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 Sybille Research Unit record?
A normal year at Sybille Research Unit brings 7,555 heating degree days, 41% more than the median U.S. place (5,373), and 298 cooling degree days, 67% 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 1,916 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,217 | 0 |
| February | 1,057 | 0 |
| March | 927 | 0 |
| April | 696 | 0 |
| May | 441 | 3 |
| June | 152 | 38 |
| July | 26 | 134 |
| August | 55 | 102 |
| September | 237 | 21 |
| October | 608 | 1 |
| November | 930 | 0 |
| December | 1,209 | 0 |
| Year (annual) | 7,555 | 298 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00488808. 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.
Have recent years at Sybille Research Unit been warmer than normal?
2024 averaged 47.8°F, 2.8°F above the 1991-2020 normal of 45.0°F.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2024 | 47.8°F | +2.8°F | 9.67 | 54.1 |
Over 41 complete years from 1965 to 2024, the station's annual mean temperature rose at a fitted 5.2°F per century (+0.29°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00488808; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Sybille Research Unit's climate compare?
Sybille Research Unit is warmer than 42 of the 71 places with their own NOAA record in Wyoming, and wetter than 46. Across the 7,247 U.S. stations with normals, its annual mean of 45.0°F is warmer than 19%.
In the Köppen classification computed from these normals, Sybille Research Unit is Dfb: continental, no dry season, warm summer. 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 Sybille Research Unit's climate
What is the coldest month at Sybille Research Unit?
January, with a normal high of 35°F and a normal low of 16°F. The warmest is July (83°F by day, 54°F at night).
Does it snow at Sybille Research Unit?
Yes: 70 inches in a normal year, falling on 26 days with 0.1 inch or more, the most in December (12.6 inches).
What is the rainiest month at Sybille Research Unit?
May, with 2.54 in of precipitation in a normal year; the driest is January with 0.49 in.
What plant hardiness zone is Sybille Research Unit in?
The USDA's 2023 map puts Sybille Research Unit in zone 5a in ZIP code 82201, the nearest ZIP area. By the same method at the station, the coldest night of a typical year reaches −12°F (17 years, 1991-2020): zone 5b.
How late can frost come at Sybille Research Unit?
In half of years the last 32°F night comes after May 22; in one year in ten it comes after June 5. Waiting until June 5 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Wyoming climateThe statewide normals and every place in the state
- Chugwater, WY29 miles from this station, 47.8°F a year
- Double Four Ranch, WY29 miles from this station, 44.4°F a year
- Wheatland, WY32 miles from this station, 49.0°F a year
- Laramie, WY35 miles from this station, 41.4°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made