Manassa, Colorado climate: Normal weather by month, frost dates and records
Manassa's normal year runs from 5°F January nights to 81°F July afternoons, with 7.8 inches of precipitation and 30 inches of snow a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 6.6°C, January lows of −15°C, July highs of 27°C, 197 mm of precipitation a year.
- NOAA stationManassa
- Station IDUSC00055322
- Location37.17°N 105.94°W
- Elevation7,695 ft (2,345 m)
- Population965
On October 23, the normal high in Manassa is 61°F and the normal low 26°F, and the chance of measurable rain or snow is 12%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Manassa.
- Jan 35° 5°
- Feb 41° 13°
- Mar 53° 21°
- Apr 60° 28°
- May 69° 37°
- Jun 79° 44°
- Jul 81° 49°
- Aug 79° 47°
- Sep 73° 40°
- Oct 63° 28°
- Nov 49° 17°
- Dec 36° 6°
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 Manassa each month?
July is the warmest month, with normal highs of 81°F; January the coldest, with normal lows of 5°F. The most precipitation falls in August (1.58 in), the least in January (0.21 in).
| Month | High | Low | Mean | Precip. | Snow | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|---|
| January | 35°F | 5°F | 19.9°F | 0.21 | 4.6 | 2 | <1 | 31 | 9 h 50 min |
| February | 41°F | 13°F | 26.9°F | 0.22 | 3.0 | 3 | <1 | 28 | 10 h 50 min |
| March | 53°F | 21°F | 36.8°F | 0.43 | 5.5 | 3 | <1 | 29 | 11 h 50 min |
| April | 60°F | 28°F | 44.1°F | 0.53 | 3.6 | 3 | <1 | 23 | 13 h 10 min |
| May | 69°F | 37°F | 52.8°F | 0.59 | 0.4 | 4 | <1 | 9 | 14 h 10 min |
| June | 79°F | 44°F | 61.3°F | 0.40 | 0.0 | 4 | <1 | 1 | 14 h 40 min |
| July | 81°F | 49°F | 64.9°F | 1.08 | 0.0 | 9 | 1 | <1 | 14 h 30 min |
| August | 79°F | 47°F | 62.9°F | 1.58 | 0.0 | 9 | <1 | <1 | 13 h 40 min |
| September | 73°F | 40°F | 56.5°F | 1.12 | 0.0 | 7 | <1 | 4 | 12 h 30 min |
| October | 63°F | 28°F | 45.7°F | 0.67 | 2.5 | 4 | <1 | 22 | 11 h 20 min |
| November | 49°F | 17°F | 32.9°F | 0.49 | 4.5 | 3 | <1 | 28 | 10 h 10 min |
| December | 36°F | 6°F | 21.0°F | 0.43 | 5.6 | 3 | <1 | 31 | 9 h 40 min |
| Year (annual) | 60°F | 28°F | 43.8°F | 7.75 | 29.7 | 53 | 1 | 206 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. | Snow |
|---|---|---|---|---|---|
| January | 2°C | −15°C | −6.7°C | 5 mm | 12 cm |
| February | 5°C | −11°C | −2.8°C | 6 mm | 8 cm |
| March | 11°C | −6°C | 2.7°C | 11 mm | 14 cm |
| April | 16°C | −2°C | 6.7°C | 13 mm | 9 cm |
| May | 21°C | 3°C | 11.6°C | 15 mm | 1 cm |
| June | 26°C | 7°C | 16.3°C | 10 mm | 0 cm |
| July | 27°C | 10°C | 18.3°C | 27 mm | 0 cm |
| August | 26°C | 8°C | 17.2°C | 40 mm | 0 cm |
| September | 23°C | 4°C | 13.6°C | 28 mm | 0 cm |
| October | 17°C | −2°C | 7.6°C | 17 mm | 6 cm |
| November | 9°C | −8°C | 0.5°C | 12 mm | 11 cm |
| December | 2°C | −14°C | −6.1°C | 11 mm | 14 cm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00055322; 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 Manassa?
Normal highs sit between 65°F and 85°F in May, June, July, August and September. Of those, June 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 USC00055322.
When is the last frost in Manassa?
In Manassa, the last spring frost (32°F) comes after May 28 in half of years and after June 11 in one year in ten; the first autumn frost comes before September 21 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 281 year in 10 after June 11; 9 in 10 after May 13
- First autumn frost, half of years before
- September 211 year in 10 before September 9; 9 in 10 before October 1
NOAA puts the median frost-free season at 115 days, and the season without a hard freeze (28°F) at 137 days.
A hard freeze (28°F) comes after May 13 in half of springs and before September 29 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Manassa in zone 5a in ZIP code 81141, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Manassa's NOAA station is in zone 5a: the coldest night of a typical year reaches −15°F (19 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 USC00055322; 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 Manassa?
In a normal year in Manassa, 1 day a year reaches 90°F, 206 nights fall to 32°F or colder and 53 days bring measurable precipitation.
- Days at 90°F or more
- 1a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 206a normal year
- Days that stay below freezing
- 32high of 32°F or less
- Days with 0.01 inch of precipitation
- 53a normal year
- Days with 1 inch of snow or more
- 13a normal year
The highest temperature in this station's record (since 1893) is 95°F, on May 30, 1969; the lowest is −37°F, on January 28, 1948.
The wettest calendar year on that record is 1914, with 11.57 in; the snowiest season is 1991–92, with 61.0 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00055322; records: ACIS (NOAA Regional Climate Centers), station USC00055322. Records use complete months only; a month missing more than three days is left out.
How sunny is Manassa?
Over a year 83% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Manassa, 5.3 kWh per square metre a day. October is the sunniest month (86%) and April the cloudiest (80%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 85% | 3.1 |
| February | 85% | 4.2 |
| March | 81% | 5.2 |
| April | 80% | 6.3 |
| May | 82% | 7.2 |
| June | 85% | 7.8 |
| July | 80% | 6.9 |
| August | 82% | 6.4 |
| September | 86% | 5.7 |
| October | 86% | 4.5 |
| November | 85% | 3.3 |
| December | 83% | 2.7 |
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 Manassa need?
A normal year in Manassa brings 7,776 heating degree days, 45% more than the median U.S. place (5,373), and 71 cooling degree days, 92% 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 1,589 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 1,397 | 0 |
| February | 1,067 | 0 |
| March | 876 | 0 |
| April | 626 | 0 |
| May | 379 | 1 |
| June | 125 | 14 |
| July | 42 | 39 |
| August | 81 | 16 |
| September | 256 | 1 |
| October | 600 | 0 |
| November | 963 | 0 |
| December | 1,366 | 0 |
| Year (annual) | 7,776 | 71 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00055322. 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 Manassa been warmer than normal lately?
2025 averaged 45.2°F, 1.4°F above the 1991-2020 normal of 43.8°F.
| Year | Mean | Against normal | Precip. | Snow |
|---|---|---|---|---|
| 2025 | 45.2°F | +1.4°F | 7.40 | 14.2 |
Over 59 complete years from 1893 to 2025, the station's annual mean temperature rose at a fitted 2.2°F per century (+0.12°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00055322; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Manassa's climate compare?
Manassa is warmer than 34 of the other 124 places with their own NOAA record in Colorado, and wetter than 2. Across the 7,247 U.S. stations with normals, its annual mean of 43.8°F is warmer than 15%.
In the Köppen classification computed from these normals, Manassa 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 Manassa share this climate record?
5 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.
- Sanford, CO900 people · 6 mi N
- La Jara, CO706 people · 7 mi N
- Antonito, CO621 people · 8 mi SW
- Romeo, CO311 people · 2 mi W
- Conejos, CO0 people · 7 mi SW
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 Manassa's climate
What is the coldest month in Manassa?
January, with a normal high of 35°F and a normal low of 5°F. The warmest is July (81°F by day, 49°F at night).
Does it snow in Manassa?
Yes: 30 inches in a normal year, falling on 15 days with 0.1 inch or more, the most in December (5.6 inches).
What is the rainiest month in Manassa?
August, with 1.58 in of precipitation in a normal year; the driest is January with 0.21 in.
What plant hardiness zone is Manassa in?
The USDA's 2023 map puts Manassa in zone 5a in ZIP code 81141, the nearest ZIP area. By the same method at Manassa's NOAA station, the coldest night of a typical year reaches −15°F (19 years, 1991-2020): zone 5a.
How late can frost come in Manassa?
In half of years the last 32°F night comes after May 28; in one year in ten it comes after June 11. Waiting until June 11 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Colorado climateThe statewide normals and every place in the state
- Waverly (1 mi W), CO19 miles from this station, 40.4°F a year
- Alamosa, CO19 miles from this station, 42.3°F a year
- San Luis, CO29 miles from this station, 44.0°F a year
- Blanca, CO29 miles from this station, 43.5°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made