Climate guideThirty-year normals for Calgary
Calgary climate by month
Warm-summer humid continental · DfbBest Jul–Sep
Annual mean5°day and night
Seasonal swing23°warmest vs coolest
Precipitation439 mm98 wet days a year
51.05° N, 114.09° WElevation 1,048 mUTC−6 · Mountain Daylight Time
When to goCalgary · weather score
Best timeJul–Sep
October: high / low12° / 0°
iSummary
What the weather is like
Calgary has a warm-summer humid continental climate (Köppen Dfb): warm summers, cold winters and precipitation in every season.
The warmest month is July, when afternoons average 24° and nights 11°. December is the coolest month, with highs of -2° and lows of -11°. The difference between the warmest and the coolest month is about 23°, a large swing typical of continental interiors.
About 439 mm of precipitation falls in an average year. June is the wettest month (93 mm, 14 wet days) and January the driest (11 mm, 5 wet days). Cloud cover ranges from 27% in July to 44% in March.
Compared with Ottawa, the capital, Calgary is 3° cooler on a July afternoon and receives less precipitation over the year.
Year in figures
- Hottest afternoons
- 24° · July
- Coldest nights
- -11° · January
- Wettest month
- June
- Driest month
- January
- Clearest skies
- July · 27% cloud
- Longest day
- 16 h 32 min
- Shortest day
- 7 h 56 min
iiCharts
Twelve months at a glance
Temperature and precipitation
Daily high/low range bars, monthly precipitation columnsTemperature curve
Average high, lowDaylight
Hours between sunrise and sunset on the 15th of each monthiiiData table
Climate normals month by month
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Average high | -1° | 3° | 7° | 12° | 17° | 21° | 24° | 23° | 19° | 12° | 3° | -2° |
| Average low | -11° | -10° | -6° | -1° | 4° | 8° | 11° | 10° | 5° | 0° | -6° | -11° |
| Precipitation | 11 mm | 10 mm | 19 mm | 26 mm | 67 mm | 93 mm | 66 mm | 56 mm | 48 mm | 17 mm | 14 mm | 12 mm |
| Wet days (≥1 mm) | 5 | 6.2 | 6.8 | 7.3 | 10.7 | 14.2 | 12.5 | 9.8 | 5.7 | 5 | 6.5 | 8 |
| Cloud cover | 42% | 41% | 44% | 44% | 40% | 38% | 27% | 29% | 32% | 36% | 43% | 41% |
| Daylight | 8h 25 | 10h 03 | 11h 50 | 13h 50 | 15h 33 | 16h 32 | 16h 06 | 14h 35 | 12h 40 | 10h 45 | 8h 56 | 7h 56 |
| Month score | 41 | 39 | 36 | 48 | 67 | 64 | 71 | 77 | 86 | 54 | 37 | 35 |
ivMonth by month
Calgary in every month
January41
-1° / -11°
11 mm · 5 wet days
February39
3° / -10°
10 mm · 6.2 wet days
March36
7° / -6°
19 mm · 6.8 wet days
April48
12° / -1°
26 mm · 7.3 wet days
May67
17° / 4°
67 mm · 10.7 wet days
June64
21° / 8°
93 mm · 14.2 wet days
July71
24° / 11°
66 mm · 12.5 wet days
August77
23° / 10°
56 mm · 9.8 wet days
September86
19° / 5°
48 mm · 5.7 wet days
October54
12° / 0°
17 mm · 5 wet days
November37
3° / -6°
14 mm · 6.5 wet days
December35
-2° / -11°
12 mm · 8 wet days