Winter tire dates for Calgary
Computed from the 30-year climate record at Calgary Intl Airport, the official Environment Canada station 8 km from Calgary, Alberta.
All-day events with a one-week reminder, straight from this page.
The climate record behind these dates
Mean daily temperature by month at Calgary Intl Airport, 30-year normals. The tire windows fall where this line crosses 7 C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| -7.1 | -5.3 | -1.6 | 4.6 | 9.7 | 13.7 | 16.5 | 15.8 | 11 | 5.2 | -2.4 | -6.8 |
Values below 7 C shown in blue: winter tire season at Calgary.
The rule in Alberta
No law
Alberta has no provincial winter tire requirement for passenger vehicles. Winter or mountain-snowflake tires are recommended below 7 C. Commercial carriers face chain-up rules on some mountain routes.
Government of Alberta, verified 2026-06-11. Full 13-province table on the planner page.
Calgary winter tire questions
When should winter tires go on in Calgary?
Around October 5. That is when the mean daily temperature at Calgary Intl Airport, the official station nearest Calgary, historically settles below 7 C, the threshold where winter compounds outgrip all-seasons even on dry pavement. Book the swap a week or two ahead; shops fill up after the first cold snap.
When do winter tires come off in Calgary?
After April 29, when mean daily temperatures climb back above 7 C to stay. Taking them off earlier risks a late cold snap; much later wears the soft compound on warm pavement.
Is there a winter tire law in Alberta?
No winter tire law. Strongly recommended; mountain park highways may require chains for commercial vehicles. Source: Government of Alberta, verified 2026-06-11.
How are these dates calculated?
From Environment and Climate Change Canada 30-year climate normals at Calgary Intl Airport (8 km from Calgary): monthly mean daily temperatures anchored mid-month, linearly interpolated across the 7 C threshold. They are planning averages from the official record, not forecasts. Full method on the methodology page.
How this page was made
The dates above are computed, not written: monthly mean daily temperatures from the Environment and Climate Change Canada Canadian Climate Normals at Calgary Intl Airport, interpolated across the 7 C tire-compound threshold. The provincial rule is taken from Government of Alberta and was last verified 2026-06-11. Full method: data and methodology. These are planning averages from the official record, not forecasts: microclimates, valleys, and lakeshores can run a week off the station record, and laws can change. Watch the forecast in the shoulder weeks and confirm current rules at the linked source before acting.
More for Calgary: frost and planting dates. Different place? The full planner covers all 655 stations.