The biggest temperature swing occurs between October and November, as typical highs shift from 10.5°C / 51°F to 2.2°C / 36°F (about 8.3°C / 14.9°F).
| Month | Low Temperature | High Temperature | Category |
|---|---|---|---|
| January | -12.8°C | -2.6°C | COLD |
| February | -11.8°C | -0.4°C | COLD |
| March | -7.8°C | 4.1°C | COLD |
| April | -2.3°C | 10°C | COOL |
| May | 3°C | 15.8°C | MILD |
| June | 7.8°C | 19.4°C | MILD |
| July | 11.1°C | 23.3°C | WARM |
| August | 10.2°C | 22.6°C | WARM |
| September | 5.9°C | 17.9°C | MILD |
| October | -0.4°C | 10.5°C | COOL |
| November | -7°C | 2.2°C | COLD |
| December | -12.3°C | -2.8°C | COLD |
July has the warmest typical feels-like highs (22.8°C / 73°F), while December is coolest (-7.4°C / 18.6°F).
| Month | Low Feels Like | High Feels Like | Category |
|---|---|---|---|
| January | -17.8°C | -7.2°C | COLD |
| February | -16.8°C | -5°C | COLD |
| March | -12.4°C | -0.4°C | COLD |
| April | -6.5°C | 6.2°C | COLD |
| May | -0.4°C | 13°C | COOL |
| June | 5.4°C | 17.9°C | MILD |
| July | 9.7°C | 22.8°C | WARM |
| August | 8.5°C | 21.4°C | MILD |
| September | 3°C | 15.3°C | MILD |
| October | -4.3°C | 6.7°C | COLD |
| November | -11.6°C | -2.1°C | COLD |
| December | -17.3°C | -7.4°C | COLD |
June is wettest at 103.3 mm / 4.07 inches, while January is driest at 12.7 mm / 0.5 inches.
| Month | Baseline | Rainfall | Category |
|---|---|---|---|
| January | -23.5 mm | 12.7 mm | DRY |
| February | -23.5 mm | 14 mm | DRY |
| March | -23.5 mm | 21.9 mm | LIGHT |
| April | -23.5 mm | 38.5 mm | LIGHT |
| May | -23.5 mm | 69.7 mm | MODERATE |
| June | -23.5 mm | 103.3 mm | MODERATE |
| July | -23.5 mm | 58.1 mm | LIGHT |
| August | -23.5 mm | 61.7 mm | MODERATE |
| September | -23.5 mm | 41.8 mm | LIGHT |
| October | -23.5 mm | 25.9 mm | LIGHT |
| November | -23.5 mm | 19.9 mm | DRY |
| December | -23.5 mm | 15.4 mm | DRY |
June has the strongest peak UV (around index 7.7).
| Month | Baseline | UV Index | Category |
|---|---|---|---|
| January | 0 | 2.3 | LOW-MOD |
| February | 0 | 3.8 | MODERATE |
| March | 0 | 5.5 | MODERATE |
| April | 0 | 6.6 | HIGH |
| May | 0 | 7.5 | HIGH |
| June | 0 | 7.7 | HIGH |
| July | 0 | 7.5 | HIGH |
| August | 0 | 7.1 | HIGH |
| September | 0 | 5.9 | MODERATE |
| October | 0 | 4.1 | MODERATE |
| November | 0 | 2.6 | LOW-MOD |
| December | 0 | 1.7 | LOW-MOD |
Daylight ranges from 8h in December to 16.5h in June.
| Month | Baseline | Daylight Hours | Category |
|---|---|---|---|
| January | 0h | 8.5h | SHORT |
| February | 0h | 10h | BALANCED |
| March | 0h | 11.9h | BALANCED |
| April | 0h | 13.9h | LONG |
| May | 0h | 15.6h | LONG |
| June | 0h | 16.5h | LONG |
| July | 0h | 16h | LONG |
| August | 0h | 14.5h | LONG |
| September | 0h | 12.6h | BALANCED |
| October | 0h | 10.7h | BALANCED |
| November | 0h | 8.9h | SHORT |
| December | 0h | 8h | SHORT |
January is most humid (69.8%), while April is driest (59.4%).
| Month | Baseline | Humidity (avg) | Category |
|---|---|---|---|
| January | 55.8% | 69.8% | HUMID |
| February | 55.8% | 66.1% | HUMID |
| March | 55.8% | 63.6% | COMFORTABLE |
| April | 55.8% | 59.4% | COMFORTABLE |
| May | 55.8% | 60.2% | COMFORTABLE |
| June | 55.8% | 66.2% | HUMID |
| July | 55.8% | 66.5% | HUMID |
| August | 55.8% | 65.9% | HUMID |
| September | 55.8% | 65.3% | HUMID |
| October | 55.8% | 66% | HUMID |
| November | 55.8% | 67.8% | HUMID |
| December | 55.8% | 69.5% | HUMID |
April has the strongest typical average wind (10.7 km/h / 6.7 mph), while August is calmest (9.0 km/h / 5.6 mph).
| Month | Baseline | Wind (avg) | Category |
|---|---|---|---|
| January | 8.3 km/h | 10.6 km/h | CALM |
| February | 8.3 km/h | 10.2 km/h | CALM |
| March | 8.3 km/h | 10.3 km/h | CALM |
| April | 8.3 km/h | 10.7 km/h | CALM |
| May | 8.3 km/h | 10.5 km/h | CALM |
| June | 8.3 km/h | 9.9 km/h | CALM |
| July | 8.3 km/h | 9 km/h | CALM |
| August | 8.3 km/h | 9 km/h | CALM |
| September | 8.3 km/h | 9.7 km/h | CALM |
| October | 8.3 km/h | 10.4 km/h | CALM |
| November | 8.3 km/h | 10.6 km/h | CALM |
| December | 8.3 km/h | 10.7 km/h | CALM |
January is windiest by P95 gust signal (51.1 km/h / 31.8 mph).
| Month | Baseline | Wind (gusts) | Category |
|---|---|---|---|
| January | 0 km/h | 51.1 km/h | VERY WINDY |
| February | 0 km/h | 47.7 km/h | WINDY |
| March | 0 km/h | 50.4 km/h | VERY WINDY |
| April | 0 km/h | 51.1 km/h | VERY WINDY |
| May | 0 km/h | 50 km/h | VERY WINDY |
| June | 0 km/h | 49.3 km/h | WINDY |
| July | 0 km/h | 46.1 km/h | WINDY |
| August | 0 km/h | 43.9 km/h | WINDY |
| September | 0 km/h | 46.8 km/h | WINDY |
| October | 0 km/h | 49 km/h | WINDY |
| November | 0 km/h | 49.1 km/h | WINDY |
| December | 0 km/h | 49 km/h | WINDY |
June has the most rain days (~16.5), while January has the fewest (~6.6). Rain days count the average number of days in a month with measurable rain (about 0.1 mm or more).
| Month | Baseline | Rain Days | Category |
|---|---|---|---|
| January | 2.7 days | 6.6 days | SOME |
| February | 2.7 days | 6.7 days | SOME |
| March | 2.7 days | 9 days | SOME |
| April | 2.7 days | 12 days | FREQUENT |
| May | 2.7 days | 14.3 days | FREQUENT |
| June | 2.7 days | 16.5 days | VERY FREQUENT |
| July | 2.7 days | 14.4 days | FREQUENT |
| August | 2.7 days | 12.1 days | FREQUENT |
| September | 2.7 days | 9.6 days | FREQUENT |
| October | 2.7 days | 8.6 days | SOME |
| November | 2.7 days | 7.5 days | SOME |
| December | 2.7 days | 6.7 days | SOME |
June has the most heavy rain/washout risk days (~6). Heavy rain days are the average number of days likely to bring stronger downpours that can disrupt outdoor plans.
| Month | Baseline | Heavy Rain Days | Category |
|---|---|---|---|
| January | 0 days | 0 days | RARE |
| February | 0 days | 1 days | OCCASIONAL |
| March | 0 days | 1 days | OCCASIONAL |
| April | 0 days | 2 days | OCCASIONAL |
| May | 0 days | 4 days | FREQUENT |
| June | 0 days | 6 days | PERSISTENT |
| July | 0 days | 4 days | FREQUENT |
| August | 0 days | 4 days | FREQUENT |
| September | 0 days | 3 days | FREQUENT |
| October | 0 days | 1 days | OCCASIONAL |
| November | 0 days | 1 days | OCCASIONAL |
| December | 0 days | 1 days | OCCASIONAL |
January has the highest heat-risk day count (~0 days). Heat days are the average number of days that exceed our location-specific heat-risk threshold.
| Month | Baseline | Heat Days | Category |
|---|---|---|---|
| January | 0 days | 0 days | LOW |
| February | 0 days | 0 days | LOW |
| March | 0 days | 0 days | LOW |
| April | 0 days | 0 days | LOW |
| May | 0 days | 0 days | LOW |
| June | 0 days | 0 days | LOW |
| July | 0 days | 0 days | LOW |
| August | 0 days | 0 days | LOW |
| September | 0 days | 0 days | LOW |
| October | 0 days | 0 days | LOW |
| November | 0 days | 0 days | LOW |
| December | 0 days | 0 days | LOW |
Daylight varies from 8 hours in December (winter) to 16.5 hours in June (summer), which is a difference of 8.5 hours.
Northern Hemisphere seasons shape the weather patterns throughout the year. Here's what to expect in each season:
| Ranking Goal | #1 | #2 | #3 | #4 |
|---|---|---|---|---|
| Lowest rain risk | Jan 0 risk days | Feb 1 risk days | Mar 1 risk days | Oct 1 risk days |
| Lowest heatwave risk | Jan 0 risk days | Feb 0 risk days | Mar 0 risk days | Apr 0 risk days |
| Lowest cold risk | Jul 10 risk days | Aug 13 risk days | Jun 23 risk days | Sep 26 risk days |
| Lowest wind disruption risk | Aug 44 km/h | Jul 46 km/h | Sep 47 km/h | Feb 48 km/h |
| Most comfortable evenings | Jul 61 / 100 | Aug 58 / 100 | Jun 44 / 100 | Mar 44 / 100 |
| Best outdoor reliability | Feb 82 / 100 | Jan 80 / 100 | Oct 78 / 100 | Dec 78 / 100 |
Click any month for detailed weather information and packing advice.
Get personalized month rankings based on weather comfort, outdoor activity suitability, and seasonal conditions.
View Best Time to VisitThe best months to visit Calgary depend on your preferences. For warm weather, July is typically the warmest month. For dry conditions, January, February, December tend to have the least rainfall. Consider your priorities, and whether you prefer warmer temperatures, drier weather, or longer daylight hours.
July is typically the warmest month in Calgary, with average high temperatures reaching around 23°C (73°F). This is peak summer weather, ideal for outdoor activities and sightseeing.
January is usually the coldest month, with average low temperatures dropping to around -13°C (9°F). Pack warm layers if visiting during this time, especially for evening activities.
June typically sees the most rainfall in Calgary, averaging around 103mm (4.1 inches). It's wise to pack waterproof layers and have some indoor backup plans if you're visiting during this month.
January is typically the driest month, with average rainfall of just 13mm (0.5 inches). This makes it an excellent time for outdoor exploration and activities with minimal risk of rain disruption.
Temperatures in Calgary range from average lows of -1°C (30°F) to highs of 10°C (50°F). This variation means you'll want to pack differently depending on when you visit, as layers are key for adapting to the seasonal changes.
Yes, sun protection is important in Calgary. UV levels can reach 8 during peak months, which is considered high. Pack sunscreen (SPF 30+), sunglasses, and a hat, especially if you'll be outdoors for extended periods.