Location almanac
Chill hours in R7A
The short answer
R7A averages 906 chill hours per winter (623–1,270 across 10 years) in USDA zone 3b.
Climate profile
| Average chill hours | 906 (623–1,270 across 10 winters) |
|---|---|
| USDA hardiness zone | 3b (NRCan zone 3a) |
| Last spring frost | typically May 6 – May 27 |
| First fall frost | typically October 5 – October 17 |
Computed from 10 winters of ERA5 hourly temperature (Open-Meteo, 2015–2025); zones from USDA PHZM 2023 / NRCan 1981–2010. Data updated July 3, 2026. See methodology.
What grows here
Every variety in our database, checked against R7A’s chill hours and zone:
Good fit (71)
Chill and zone requirements are comfortably met in R7A.
| Variety | Fruit |
|---|---|
| Chestnut Crab | Apple |
| Frostbite | Apple |
| Gravenstein | Apple |
| Haralson | Apple |
| Honeycrisp | Apple |
| Honeygold | Apple |
| Lodi | Apple |
| Sweet Sixteen | Apple |
| TropicSweet | Apple |
| Wealthy | Apple |
| Yellow Transparent | Apple |
| Zestar | Apple |
| Arctic Star | Nectarine |
| Double Delight | Nectarine |
| Flavortop | Nectarine |
| Harko | Nectarine |
| Independence | Nectarine |
| Mericrest | Nectarine |
| Panamint | Nectarine |
| Snow Queen | Nectarine |
| August Pride | Peach |
| Babcock | Peach |
| Belle of Georgia | Peach |
| Cresthaven | Peach |
| Donut | Peach |
| Elberta | Peach |
| Eva's Pride | Peach |
| Flameprince | Peach |
| Flordacrest | Peach |
| Flordaprince | Peach |
Show 41 more good fit varieties
- Frost
- Gulfprince
- Harvester
- Junegold
- Loring
- Mid-Pride
- O'Henry
- Redglobe
- Redskin
- Suncrest
- Tropic Snow
- TropicBeauty
- UFGold
- UFOne
- UFSun
- 20th Century
- Chojuro
- D'Anjou
- Golden Spice
- Harrow Delight
- Kieffer
- Moonglow
- Shinko
- Ure
- Warren
- Yoinashi
- Hachiya
- Alderman
- Beauty
- Blue Damson
- Elephant Heart
- Flavor Grenade
- Flavor King
- Flavor Supreme
- French Improved Prune
- Green Gage
- Santa Rosa
- Satsuma
- Brooks
- Sunburst
- Evans Bali
Questions
- How many chill hours does R7A get?
- R7A averages 906 chill hours per winter, ranging from 623 to 1270 across the last 10 years.
- What hardiness zone is R7A?
- R7A is in USDA hardiness zone 3b.
Growing fruit trees in R7A? Get a care calendar anchored to this exact climate, with email reminders.
Start My OrchardSources
- [1] Open-Meteo / Copernicus ERA5. Historical Weather API (hourly 2m temperature) — accessed July 2026
- [2] Natural Resources Canada. Plant Hardiness Zones of Canada — accessed July 2026