Climate snapshot for alpacas
94/100Alpaca climate comfort score
79°FAverage high, Jul
15°FAverage low, Dec
~2Days above 90°F (32°C) per year
~204Frost nights per year
20 inAnnual precipitation
0Barber pole worm months
17Hay bales / alpaca / year
Main challenges
- Hard winters — average lows under 15 °F in Dec–Jan
Advantages
- Summers rarely reach heat-stress levels for alpacas
- Short or no barber pole worm transmission season
- Low meningeal worm risk
Overall rating: 94/100 — Excellent on our alpaca climate comfort score. Climate type: Warm-summer humid continental (Köppen Dfb).
Month-by-month climate
Average highAverage lowPrecipitation
| Month | High | Low | Precip. | Heat-stress index | Notes |
|---|---|---|---|---|---|
| Jan | 36°F | 15°F | 1.1 in | 110 · ok | frost |
| Feb | 38°F | 15°F | 1.2 in | 106 · ok | frost |
| Mar | 46°F | 21°F | 1.8 in | 116 · ok | frost |
| Apr | 52°F | 27°F | 2.7 in | 110 · ok | frost |
| May | 61°F | 35°F | 2.8 in | 114 · ok | grass |
| Jun | 72°F | 43°F | 1.8 in | 116 · ok | grass |
| Jul | 79°F | 50°F | 1.9 in | 127 · caution | grass |
| Aug | 77°F | 48°F | 1.7 in | 131 · caution | grass |
| Sep | 69°F | 40°F | 1.6 in | 122 · ok | grass |
| Oct | 56°F | 30°F | 1.5 in | 108 · ok | frost |
| Nov | 44°F | 22°F | 1.3 in | 113 · ok | frost |
| Dec | 36°F | 15°F | 1.1 in | 104 · ok | frost |
Heat-stress index = average high (°F) + mean humidity (%). “Worms” marks months that suit barber pole worm transmission; “grass” marks the grazing season; “frost” marks months with average lows below freezing. Source: NOAA nClimDiv 1991–2020 county normals.
Alpaca care calendar for Larimer County, Colorado
January 36° / 15°F
- Hard cold: extra hay at night, heated water, windbreaks and coats for crias or seniors; check ears for frostbite.
- Vitamin D for crias and juveniles (ask your vet about product and dose).
- Toenail check and trim.
February 38° / 15°F
- Freezing nights: keep water open and feed extra hay during cold snaps.
- Vitamin D for crias and juveniles (ask your vet about product and dose).
March 46° / 21°F
- Freezing nights: keep water open and feed extra hay during cold snaps.
- Vitamin D for crias and juveniles (ask your vet about product and dose).
- Toenail check and trim.
April 52° / 27°F
- Book your shearer now — spring calendars fill up fast.
- Freezing nights: keep water open and feed extra hay during cold snaps.
May 61° / 35°F
- CDT boosters for females due next month; prepare a clean birthing paddock and birthing kit.
- Spring grass: switch from hay to pasture gradually over 1–2 weeks and monitor body condition.
- Toenail check and trim.
June 72° / 43°F
- Shearing month: shear the whole herd, and trim toenails, check teeth and body condition while animals are restrained.
- Cria season: check due dates daily, ensure crias nurse within 4 hours, dip navels and weigh crias daily for two weeks.
- Fly season: clean dung piles regularly and use traps around the barn.
July 79° / 50°F
- Warm spells possible — watch for open-mouth breathing in heavy-fleeced or dark animals.
- Cria season: check due dates daily, ensure crias nurse within 4 hours, dip navels and weigh crias daily for two weeks.
- Breeding window for next year's crias (rebreed females 2–4 weeks after birthing).
- Fly season: clean dung piles regularly and use traps around the barn.
- Toenail check and trim.
August 77° / 48°F
- Warm spells possible — watch for open-mouth breathing in heavy-fleeced or dark animals.
- Cria season: check due dates daily, ensure crias nurse within 4 hours, dip navels and weigh crias daily for two weeks.
- Breeding window for next year's crias (rebreed females 2–4 weeks after birthing).
- Fly season: clean dung piles regularly and use traps around the barn.
September 69° / 40°F
- Cria season: check due dates daily, ensure crias nurse within 4 hours, dip navels and weigh crias daily for two weeks.
- Breeding window for next year's crias (rebreed females 2–4 weeks after birthing).
- Secure winter hay: about 17 small square bales per alpaca per year here — test a sample before buying.
- Winter prep: install water heaters, repair shelters and windbreaks, stock bedding.
- Toenail check and trim.
October 56° / 30°F
- Breeding window for next year's crias (rebreed females 2–4 weeks after birthing).
- Freezing nights: keep water open and feed extra hay during cold snaps.
- Vitamin D for crias and juveniles (ask your vet about product and dose).
November 44° / 22°F
- Freezing nights: keep water open and feed extra hay during cold snaps.
- Vitamin D for crias and juveniles (ask your vet about product and dose).
- Toenail check and trim.
December 36° / 15°F
- Hard cold: extra hay at night, heated water, windbreaks and coats for crias or seniors; check ears for frostbite.
- Vitamin D for crias and juveniles (ask your vet about product and dose).
Key recommendations
- Shearing: June.
- Best months for crias to be born: Jun–Sep (breed in Jul–Oct).
- Heat precautions: rarely needed — still provide shade and water.
- Barber pole worm: low transmission risk on average — still run fecal egg counts in spring and autumn.
- Freezing nights: Oct–Apr — keep water from freezing.
- Vitamin D for crias: Oct–Mar.
- Grazing season: May–Sep (about 5 months); feed hay the rest of the year.
- Meningeal worm: Meningeal worm is uncommon this far west but cases occur near the edge of its range.
- Selenium: Most forage here supplies adequate selenium, and some western areas have high-selenium plants — avoid stacking selenium supplements.
Tools: heat-stress calculator · winter hay calculator · due-date calculator · parasite control guide.
Alpaca farms & shops nearby
Places mapped on OpenStreetMap with “alpaca” in their name, within about 80 km (50 miles). Contact them before visiting — opening times change.
| Name | Type | Distance | Website |
|---|---|---|---|
| Alpaca Connection · Boulder | shop | 46 mi | Visit |
| The Alpaca Store | shop | 48 mi | — |
Data © OpenStreetMap contributors. Know a farm that's missing? Add it to OpenStreetMap and it will appear here in the next update.
Frequently asked questions
Can you raise alpacas in Larimer County, Colorado?
Yes. Alpacas are kept successfully in most climates with good management. Larimer County, Colorado scores 94/100 (excellent) on our alpaca climate comfort scale; the key issues are hard winters.
When should alpacas be shorn in Larimer County, Colorado?
Plan shearing for June, once nights stay above about 38°F (3°C) but before summer heat builds.
What is the best time for crias to be born in Larimer County, Colorado?
Mild months suit newborn crias best — here that is Jun–Sep. For births then, breed females in Jul–Oct (gestation is about 335 days).
How much hay does an alpaca need per year in Larimer County, Colorado?
With roughly 7 months of little or no grazing, plan on about 833 lb (378 kg) — around 17 small square bales — per adult alpaca per year, plus waste.
Nearby counties
Coordinates 40.658, -105.487 · land area 2,596 sq mi. Long-term averages, not forecasts. See methodology and data sources. Back to Colorado.