Byers, Colorado climate: Normal weather by month, frost dates and records
Byers's normal year runs from 14°F December nights to 90°F July afternoons, with 16.3 inches of precipitation and 43 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 9.5°C, December lows of −10°C, July highs of 32°C, 414 mm of precipitation a year.
- NOAA stationByers (5 mi ENE)
- Station IDUSC00051179
- Location39.74°N 104.13°W
- Elevation5,101 ft (1,555 m)
- Population (census place)1,804
On October 23, the normal high in Byers is 62°F and the normal low 30°F, and the chance of measurable rain or snow is 15%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Byers.
- Jan 42° 14°
- Feb 45° 16°
- Mar 54° 25°
- Apr 61° 32°
- May 71° 42°
- Jun 83° 51°
- Jul 90° 57°
- Aug 87° 56°
- Sep 79° 47°
- Oct 65° 33°
- Nov 53° 22°
- Dec 43° 14°
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 Byers each month?
July is the warmest month, with normal highs of 90°F; December the coldest, with normal lows of 14°F. The most precipitation falls in July (2.56 in), the least in January (0.45 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 42°F | 14°F | 28.3°F | 0.45 | 6.1 | 4 | <1 | 31 | 9 h 40 min |
| February | 45°F | 16°F | 30.2°F | 0.52 | 6.3 | 4 | <1 | 27 | 10 h 40 min |
| March | 54°F | 25°F | 39.5°F | 1.21 | 7.3 | 5 | <1 | 26 | 11 h 50 min |
| April | 61°F | 32°F | 46.3°F | 1.82 | 5.5 | 7 | <1 | 16 | 13 h 10 min |
| May | 71°F | 42°F | 56.0°F | 2.46 | 0.7 | 9 | 1 | 4 | 14 h 20 min |
| June | 83°F | 51°F | 66.9°F | 1.98 | 0.0 | 9 | 9 | <1 | 15 h |
| July | 90°F | 57°F | 73.4°F | 2.56 | 0.0 | 9 | 19 | <1 | 14 h 40 min |
| August | 87°F | 56°F | 71.3°F | 1.99 | 0.0 | 8 | 14 | <1 | 13 h 50 min |
| September | 79°F | 47°F | 62.9°F | 1.20 | 0.9 | 5 | 5 | 1 | 12 h 30 min |
| October | 65°F | 33°F | 49.2°F | 0.98 | 3.8 | 5 | <1 | 14 | 11 h 10 min |
| November | 53°F | 22°F | 37.3°F | 0.67 | 5.9 | 4 | <1 | 27 | 10 h |
| December | 43°F | 14°F | 28.1°F | 0.45 | 6.2 | 4 | <1 | 31 | 9 h 20 min |
| Year (annual) | 64°F | 34°F | 49.1°F | 16.29 | 42.7 | 72 | 48 | 176 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 6°C | −10°C | −2.1°C | 11 mm | 15 cm |
| February | 7°C | −9°C | −1.0°C | 13 mm | 16 cm |
| March | 12°C | −4°C | 4.2°C | 31 mm | 19 cm |
| April | 16°C | 0°C | 7.9°C | 46 mm | 14 cm |
| May | 21°C | 5°C | 13.3°C | 62 mm | 2 cm |
| June | 28°C | 11°C | 19.4°C | 50 mm | 0 cm |
| July | 32°C | 14°C | 23.0°C | 65 mm | 0 cm |
| August | 31°C | 13°C | 21.8°C | 51 mm | 0 cm |
| September | 26°C | 8°C | 17.2°C | 30 mm | 2 cm |
| October | 18°C | 1°C | 9.6°C | 25 mm | 10 cm |
| November | 11°C | −5°C | 2.9°C | 17 mm | 15 cm |
| December | 6°C | −10°C | −2.2°C | 11 mm | 16 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00051179; 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 Byers?
Normal highs sit between 65°F and 85°F in May, June, September and October. Of those, October 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 USC00051179.
When is the last frost in Byers?
In Byers, the last spring frost (32°F) comes after May 13 in half of years and after May 30 in one year in ten; the first autumn frost comes before October 2 in half of years and before September 20 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 131 year in 10 after May 30; 9 in 10 after April 30
- First autumn frost, half of years before
- October 21 year in 10 before September 20; 9 in 10 before October 14
NOAA puts the median frost-free season at 142 days, and the season without a hard freeze (28°F) at 160 days.
A hard freeze (28°F) comes after May 2 in half of springs and before October 10 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Byers in zone 5b in ZIP code 80136, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Byers's NOAA station is in zone 5a: the coldest night of a typical year reaches −16°F (24 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 Colorado · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00051179; 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 Byers?
In a normal year in Byers, 48 days a year reach 90°F (3 of them 100°F or more), 176 nights fall to 32°F or colder and 72 days bring measurable precipitation.
- Days at 90°F or more
- 48a normal year
- Days at 100°F or more
- 3a normal year
- Nights at 32°F or colder
- 176a normal year
- Days that stay below freezing
- 23high of 32°F or less
- Days with 0.01 inch of precipitation
- 72a normal year
- Days with 1 inch of snow or more
- 15a normal year
The highest temperature in this station's record (since 1930) is 106°F, on June 23, 1954; the lowest is −36°F, on February 8, 1936.
The wettest calendar year on that record is 1969, with 23.76 in; the snowiest season is 1983–84, with 84.5 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00051179; records: ACIS (NOAA Regional Climate Centers), station USC00051179. Records use complete months only; a month missing more than three days is left out.
How sunny is Byers?
Over a year 80% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Byers, 4.8 kWh per square metre a day. September is the sunniest month (85%) and May the cloudiest (76%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 79% | 2.6 |
| February | 78% | 3.5 |
| March | 78% | 4.7 |
| April | 76% | 5.8 |
| May | 76% | 6.5 |
| June | 82% | 7.2 |
| July | 83% | 7.0 |
| August | 84% | 6.3 |
| September | 85% | 5.4 |
| October | 82% | 4.0 |
| November | 81% | 2.9 |
| December | 79% | 2.3 |
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 Byers need?
A normal year in Byers brings 6,427 heating degree days, 20% more than the median U.S. place (5,373), and 674 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 2,725 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,139 | 0 |
| February | 974 | 0 |
| March | 791 | 0 |
| April | 560 | 1 |
| May | 294 | 15 |
| June | 60 | 117 |
| July | 6 | 268 |
| August | 13 | 208 |
| September | 127 | 63 |
| October | 492 | 2 |
| November | 830 | 0 |
| December | 1,142 | 0 |
| Year (annual) | 6,427 | 674 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00051179. 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 Byers's climate compare?
Byers is warmer than 65 of the other 124 places with their own NOAA record in Colorado, and wetter than 74. Across the 7,247 U.S. stations with normals, its annual mean of 49.1°F is warmer than 36%.
In the Köppen classification computed from these normals, Byers 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 Byers share this climate record?
4 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.
- Strasburg, CO3,249 people · 10 mi W
- Deer Trail, CO1,624 people · 10 mi SE
- Comanche Creek, CO389 people · 14 mi SW
- Peoria, CO71 people · 6 mi S
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 Byers's climate
What is the coldest month in Byers?
December, with a normal high of 43°F and a normal low of 14°F. The warmest is July (90°F by day, 57°F at night).
Does it snow in Byers?
Yes: 43 inches in a normal year, falling on 20 days with 0.1 inch or more, the most in March (7.3 inches).
What is the rainiest month in Byers?
July, with 2.56 in of precipitation in a normal year; the driest is January with 0.45 in.
What plant hardiness zone is Byers in?
The USDA's 2023 map puts Byers in zone 5b in ZIP code 80136, the nearest ZIP area. By the same method at Byers's NOAA station, the coldest night of a typical year reaches −16°F (24 years, 1991-2020): zone 5a.
How late can frost come in Byers?
In half of years the last 32°F night comes after May 13; in one year in ten it comes after May 30. Waiting until May 30 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Colorado climateThe statewide normals and every place in the state
- Denver, CO29 miles from this station, 51.2°F a year
- Lindon (5 mi WNW), CO34 miles from this station, 50.0°F a year
- Elizabeth, CO37 miles from this station, 48.2°F a year
- Parker, CO37 miles from this station, 49.7°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made