Deaver, Wyoming climate: Normal weather by month, frost dates and records
Deaver's normal year runs from 7°F January nights to 90°F July afternoons, with 5.5 inches of precipitation and 12 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 7.8°C, January lows of −14°C, July highs of 32°C, 140 mm of precipitation a year.
- NOAA stationDeaver
- Station IDUSC00482415
- Location44.89°N 108.59°W
- Elevation4,105 ft (1,251 m)
- From the centerunder 1 mile
- Population171
On October 23, the normal high in Deaver is 58°F and the normal low 30°F, and the chance of measurable rain or snow is 9%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Deaver.
- Jan 31° 7°
- Feb 37° 12°
- Mar 51° 23°
- Apr 60° 32°
- May 70° 43°
- Jun 80° 51°
- Jul 90° 57°
- Aug 88° 55°
- Sep 77° 44°
- Oct 61° 33°
- Nov 45° 20°
- Dec 33° 9°
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 Deaver each month?
July is the warmest month, with normal highs of 90°F; January the coldest, with normal lows of 7°F. The most precipitation falls in May (1.10 in), the least in January (0.09 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 31°F | 7°F | 18.6°F | 0.09 | 3.2 | 2 | <1 | 31 | 9 h 10 min |
| February | 37°F | 12°F | 24.3°F | 0.15 | 2.5 | 2 | <1 | 28 | 10 h 20 min |
| March | 51°F | 23°F | 37.0°F | 0.21 | 1.3 | 2 | <1 | 27 | 11 h 50 min |
| April | 60°F | 32°F | 46.0°F | 0.40 | 0.8 | 4 | <1 | 17 | 13 h 30 min |
| May | 70°F | 43°F | 56.1°F | 1.10 | 0.1 | 5 | 1 | 4 | 14 h 50 min |
| June | 80°F | 51°F | 65.5°F | 1.09 | 0.0 | 6 | 5 | <1 | 15 h 30 min |
| July | 90°F | 57°F | 73.5°F | 0.55 | 0.0 | 4 | 17 | <1 | 15 h 20 min |
| August | 88°F | 55°F | 71.3°F | 0.35 | 0.0 | 3 | 16 | <1 | 14 h 10 min |
| September | 77°F | 44°F | 60.5°F | 0.59 | 0.0 | 3 | 3 | 3 | 12 h 40 min |
| October | 61°F | 33°F | 46.9°F | 0.59 | 0.6 | 3 | <1 | 18 | 11 h |
| November | 45°F | 20°F | 32.6°F | 0.24 | 1.4 | 2 | <1 | 28 | 9 h 40 min |
| December | 33°F | 9°F | 20.9°F | 0.15 | 2.3 | 2 | <1 | 31 | 8 h 50 min |
| Year (annual) | 60°F | 32°F | 46.1°F | 5.51 | 12.2 | 39 | 41 | 187 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | −1°C | −14°C | −7.4°C | 2 mm | 8 cm |
| February | 3°C | −11°C | −4.3°C | 4 mm | 6 cm |
| March | 10°C | −5°C | 2.8°C | 5 mm | 3 cm |
| April | 16°C | 0°C | 7.8°C | 10 mm | 2 cm |
| May | 21°C | 6°C | 13.4°C | 28 mm | 0 cm |
| June | 27°C | 11°C | 18.6°C | 28 mm | 0 cm |
| July | 32°C | 14°C | 23.1°C | 14 mm | 0 cm |
| August | 31°C | 13°C | 21.8°C | 9 mm | 0 cm |
| September | 25°C | 7°C | 15.8°C | 15 mm | 0 cm |
| October | 16°C | 0°C | 8.3°C | 15 mm | 2 cm |
| November | 7°C | −7°C | 0.3°C | 6 mm | 4 cm |
| December | 0°C | −13°C | −6.2°C | 4 mm | 6 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00482415; 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 Deaver?
Normal highs sit between 65°F and 85°F in May, June and September. Of those, September 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 USC00482415.
When is the last frost in Deaver?
In Deaver, the last spring frost (32°F) comes after May 6 in half of years and after May 20 in one year in ten; the first autumn frost comes before October 1 in half of years and before September 19 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 61 year in 10 after May 20; 9 in 10 after April 26
- First autumn frost, half of years before
- October 11 year in 10 before September 19; 9 in 10 before October 16
NOAA puts the median frost-free season at 148 days, and the season without a hard freeze (28°F) at 168 days.
A hard freeze (28°F) comes after April 27 in half of springs and before October 12 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Deaver in zone 5a in ZIP code 82421, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Deaver's NOAA station is in zone 5a: the coldest night of a typical year reaches −20°F (22 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 USC00482415; 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 Deaver?
In a normal year in Deaver, 41 days a year reach 90°F (3 of them 100°F or more), 187 nights fall to 32°F or colder and 39 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
- 187a normal year
- Days that stay below freezing
- 47high of 32°F or less
- Days with 0.01 inch of precipitation
- 39a normal year
- Days with 1 inch of snow or more
- 6a normal year
The highest temperature in this station's record (since 1916) is 109°F, on July 13, 2026; the lowest is −42°F, on December 13, 1919.
The wettest calendar year on that record is 1964, with 9.51 in; the snowiest season is 1954–55, with 34.6 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00482415; records: ACIS (NOAA Regional Climate Centers), station USC00482415. Records use complete months only; a month missing more than three days is left out.
How sunny is Deaver?
Over a year 78% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Deaver, 4.4 kWh per square metre a day. July is the sunniest month (87%) and December the cloudiest (65%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 71% | 1.8 |
| February | 72% | 2.8 |
| March | 74% | 4.0 |
| April | 74% | 5.3 |
| May | 75% | 6.3 |
| June | 82% | 7.2 |
| July | 87% | 7.3 |
| August | 85% | 6.2 |
| September | 83% | 4.8 |
| October | 76% | 3.2 |
| November | 72% | 2.0 |
| December | 65% | 1.4 |
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 Deaver need?
A normal year in Deaver brings 7,504 heating degree days, 40% more than the median U.S. place (5,373), and 646 cooling degree days, 29% 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 2,542 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,440 | 0 |
| February | 1,141 | 0 |
| March | 867 | 0 |
| April | 572 | 1 |
| May | 290 | 14 |
| June | 84 | 99 |
| July | 11 | 273 |
| August | 21 | 218 |
| September | 174 | 41 |
| October | 564 | 1 |
| November | 972 | 0 |
| December | 1,368 | 0 |
| Year (annual) | 7,504 | 646 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00482415. 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 Deaver been warmer than normal lately?
2025 averaged 45.8°F, 0.3°F below the 1991-2020 normal of 46.1°F. 2 of the 5 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2021 | 49.0°F | +2.9°F | 3.15 | 17.6 |
| 2022 | 43.1°F | −3.0°F | 4.39 | 14.2 |
| 2023 | 44.5°F | −1.6°F | 4.59 | 9.0 |
| 2024 | 46.3°F | +0.1°F | 4.49 | 4.5 |
| 2025 | 45.8°F | −0.3°F | 5.59 | 22.0 |
Over 61 complete years from 1916 to 2025, the station's annual mean temperature rose at a fitted 3.7°F per century (+0.20°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00482415; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Deaver's climate compare?
Deaver is warmer than 52 of the other 70 places with their own NOAA record in Wyoming, and wetter than 0. Across the 7,247 U.S. stations with normals, its annual mean of 46.1°F is warmer than 24%.
In the Köppen classification computed from these normals, Deaver is BWk: cold desert. 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 Deaver share this climate record?
Frannie 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.
- Frannie, WY146 people · 6 mi N
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 Deaver's climate
What is the coldest month in Deaver?
January, with a normal high of 31°F and a normal low of 7°F. The warmest is July (90°F by day, 57°F at night).
Does it snow in Deaver?
Yes: 12 inches in a normal year, falling on 8 days with 0.1 inch or more, the most in January (3.2 inches).
What is the rainiest month in Deaver?
May, with 1.10 in of precipitation in a normal year; the driest is January with 0.09 in.
What plant hardiness zone is Deaver in?
The USDA's 2023 map puts Deaver in zone 5a in ZIP code 82421, the nearest ZIP area. By the same method at Deaver's NOAA station, the coldest night of a typical year reaches −20°F (22 years, 1991-2020): zone 5a.
How late can frost come in Deaver?
In half of years the last 32°F night comes after May 6; 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
- Wyoming climateThe statewide normals and every place in the state
- Lovell, WY10 miles from this station, 44.9°F a year
- Powell, WY11 miles from this station, 43.2°F a year
- Heart Mountain, WY22 miles from this station, 45.6°F a year
- Clark (3 mi NE), WY27 miles from this station, 44.6°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made