Everything below is collected in one spot so you do not have to cross-check Calgary climate: monthly averages by hand. The gap between Dec and Jul is 24.6 C here: -7.8 C against 16.8 C. Precipitation peaks in Jun (3.82 mm/day) and bottoms out in Jan (0.54 mm/day), so a 7.1x difference between the two. Taken together that is roughly 545 mm of rain a year for the grid cell. The build runs on a schedule and caches the last good response, so the numbers stay put even when the upstream API is having a bad day. The table underneath carries the per-month breakdown; the related pages cover the same dataset nearby.
Annual mean temperature 3.6 C
Warmest month Jul (16.8 C)
Coldest month Dec (-7.8 C)
Wettest month Jun (3.82 mm/day)
All-time record high 35.1 C
All-time record low -34.6 C
Annual precipitation 548 mm / year
Coordinates 51.0501, -114.0853
Population 1,306,784
Average monthly temperature and rainfall in Calgary
Month
Mean temp (C)
Rain (mm/day)
Record high (C)
Record low (C)
Jan
-7.2
0.54
8.1
-34.6
Feb
-6.9
0.73
12.3
-30.2
Mar
-2.5
0.85
21.9
-29.8
Apr
2.6
1.53
25.5
-15.6
May
8.7
2.37
29.1
-9.5
Jun
12.8
3.82
31.4
-3.0
Jul
16.8
1.88
35.1
2.4
Aug
15.5
1.96
34.8
-0.3
Sep
10.3
1.76
30.3
-10.6
Oct
3.4
1.03
25.2
-19.9
Nov
-2.9
0.77
16.2
-29.5
Dec
-7.8
0.69
9.8
-34.0
What the Calgary climate table shows
Values are multi-decadal climatological averages for the 51.0501, -114.0853 grid cell, not a single year. Rain is the daily mean, so a value of 2.00 mm/day is about 60 mm across a 30-day month. Averages smooth over extremes, so use them for planning rather than for what to pack for next Tuesday.
Frequently asked questions
How much rain is 3.82 mm/day in a month?
Rain is recorded as a daily mean, so 3.82 mm/day is roughly 116 mm across a 30-day month.
Does Calgary get the same every year?
Close to it. Averaging decades smooths variation, so treat these as typical rather than guaranteed.