Climate snapshot for alpacas
100/100Alpaca climate comfort score
86°FAverage high, Jul
27°FAverage low, Dec
~16Days above 90°F (32°C) per year
~112Frost nights per year
13 inAnnual precipitation
0Barber pole worm months
20Hay bales / alpaca / year
Main challenges
- Dry climate — only 13 in of rain — irrigated pasture or year-round hay
- Low selenium — regional soils and hay tend to be selenium-deficient
Advantages
- Summers rarely reach heat-stress levels for alpacas
- Winters are cold but rarely severe
- Short or no barber pole worm transmission season
- Low meningeal worm risk
Overall rating: 100/100 — Excellent on our alpaca climate comfort score. Climate type: Cold semi-arid (Köppen BSk).
Month-by-month climate
Average highAverage lowPrecipitation
| Month | High | Low | Precip. | Heat-stress index | Notes |
|---|---|---|---|---|---|
| Jan | 40°F | 28°F | 1.8 in | 118 · ok | frost |
| Feb | 45°F | 29°F | 1.3 in | 120 · ok | frost |
| Mar | 53°F | 32°F | 1.2 in | 119 · ok | — |
| Apr | 60°F | 36°F | 1.2 in | 123 · ok | grass |
| May | 69°F | 43°F | 1.2 in | 123 · ok | grass |
| Jun | 76°F | 48°F | 0.8 in | 120 · caution | — |
| Jul | 86°F | 55°F | 0.2 in | 116 · ok | — |
| Aug | 86°F | 54°F | 0.3 in | 129 · caution | — |
| Sep | 77°F | 48°F | 0.4 in | 120 · caution | — |
| Oct | 63°F | 39°F | 1.2 in | 119 · ok | grass |
| Nov | 48°F | 32°F | 1.8 in | 121 · ok | frost |
| Dec | 39°F | 27°F | 2.0 in | 113 · 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 Sherman County, Oregon
January 40° / 28°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.
February 45° / 29°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 53° / 32°F
- Book your shearer now — spring calendars fill up fast.
- CDT boosters for females due next month; prepare a clean birthing paddock and birthing kit.
- Vitamin D for crias and juveniles (ask your vet about product and dose).
- Toenail check and trim.
April 60° / 36°F
- Cria season: check due dates daily, ensure crias nurse within 4 hours, dip navels and weigh crias daily for two weeks.
- Spring grass: switch from hay to pasture gradually over 1–2 weeks and monitor body condition.
May 69° / 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.
- Breeding window for next year's crias (rebreed females 2–4 weeks after birthing).
- Secure winter hay: about 20 small square bales per alpaca per year here — test a sample before buying.
- Toenail check and trim.
June 76° / 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.
July 86° / 55°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).
- Dry pasture: supplement with hay as grass goes dormant; keep water troughs clean and full.
- Fly season: clean dung piles regularly and use traps around the barn.
- Toenail check and trim.
August 86° / 54°F
- Warm spells possible — watch for open-mouth breathing in heavy-fleeced or dark animals.
- Breeding window for next year's crias (rebreed females 2–4 weeks after birthing).
- Dry pasture: supplement with hay as grass goes dormant; keep water troughs clean and full.
- Fly season: clean dung piles regularly and use traps around the barn.
September 77° / 48°F
- Warm spells possible — watch for open-mouth breathing in heavy-fleeced or dark animals.
- Fly season: clean dung piles regularly and use traps around the barn.
- Toenail check and trim.
October 63° / 39°F
- Winter prep: install water heaters, repair shelters and windbreaks, stock bedding.
- Vitamin D for crias and juveniles (ask your vet about product and dose).
November 48° / 32°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 39° / 27°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).
Key recommendations
- Shearing: May.
- Best months for crias to be born: Apr–Jul (breed in May–Aug).
- 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: Nov–Feb — keep water from freezing.
- Vitamin D for crias: Oct–Mar.
- Grazing season: Apr–May, Oct (about 3 months); feed hay the rest of the year.
- Meningeal worm: Meningeal worm is not established in this region.
- Selenium: Soils and hay in this state are often selenium-deficient. Use a camelid mineral formulated for low-selenium areas and blood-test a few animals each year.
Tools: heat-stress calculator · winter hay calculator · due-date calculator · parasite control guide.
Alpaca farms & shops nearby
No alpaca farms near Sherman County, Oregon are mapped on OpenStreetMap yet. If you keep alpacas here, consider adding your farm to OpenStreetMap — it will appear on this page after the next update.
Frequently asked questions
Can you raise alpacas in Sherman County, Oregon?
Yes. Alpacas are kept successfully in most climates with good management. Sherman County, Oregon scores 100/100 (excellent) on our alpaca climate comfort scale; the key issues are dry climate and low selenium.
When should alpacas be shorn in Sherman County, Oregon?
Plan shearing for May, 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 Sherman County, Oregon?
Mild months suit newborn crias best — here that is Apr–Jul. For births then, breed females in May–Aug (gestation is about 335 days).
How much hay does an alpaca need per year in Sherman County, Oregon?
With roughly 9 months of little or no grazing, plan on about 967 lb (439 kg) — around 20 small square bales — per adult alpaca per year, plus waste.
Nearby counties
Coordinates 45.399, -120.679 · land area 824 sq mi. Long-term averages, not forecasts. See methodology and data sources. Back to Oregon.