Hamilton is 3.6°C (6.5°F) warmer by day, Hamilton has 5.3°C (9.5°F) warmer nights, Hamilton gets 194 mm (7.6 in) more rain a year.
Calgary is at its warmest in July and coolest in January, while Hamilton peaks in July and bottoms out in January. Month for month, Hamilton is the warmer of the two in 12 of 12 months.
Hamilton is the wetter of the two, collecting 718 mm (28.3 in) of rain a year against 524 mm (20.6 in) in Calgary. The most comfortable time to visit is June, July and August in Calgary and June, July and August in Hamilton.
| Calgary | Metric | Hamilton |
|---|---|---|
| 🌡️ Temperature | ||
| 18.2°C | 🌡️Average daytime high | 21.8°C |
| -10.1°C | 🌙Average nighttime low | -4.8°C |
| July | 🔥Hottest month | July |
| January | ❄️Coldest month | January |
| 🌧️ Rain | ||
| 524 mm | 🌧️Annual rainfall | 718 mm |
| June | ☔Wettest month | July |
| January | 🏜️Driest month | February |
| 💨 Climate | ||
| 71% | 💧Average humidity | 77% |
| 1.3 m/s | 💨Average wind speed | 3.3 m/s |
Overnight, Calgary typically falls to around -10.1°C (13.8°F) while Hamilton settles near -4.8°C (23.4°F).
Calgary is hottest in July and coldest in January, whereas Hamilton peaks in July and is coolest in January.
Calgary sees the most rain in June and the least in January; Hamilton is wettest in July and driest in February.
Hamilton feels the more humid of the two, averaging 77% relative humidity against 71%.
For Hamilton, the pick of the year is June, July and August.
Month by month, here is the coldest night, the average day and the hottest afternoon each city can expect. Switch Compare to read rainfall, humidity, wind or solar instead, and Period to move between the long-term 45-year average and any single year — the shading is a quick warm-to-cool guide.
| Month | Calgary | Hamilton | ||||
|---|---|---|---|---|---|---|
| Min | Avg | Max | Min | Avg | Max | |
| January | -25.1 | -10.1❄️ | 4.9 | -20.5 | -7.1❄️ | 6.2 |
| February | -22.7 | -7.3 | 8.1 | -19.6 | -5.9 | 7.8 |
| March | -17.5 | -2.2 | 13.2 | -15.2 | 0.8 | 16.9 |
| April | -9.4 | 5.1 | 19.5 | -6 | 8.3 | 22.7 |
| May | -4 | 10.4 | 24.9 | -0.3 | 13.9 | 28.1 |
| June | 1.5 | 14.2 | 26.8 | 5.5 | 18.7 | 31.9 |
| July | 4.8 | 17.5🔥 | 30.1 | 10.2 | 22🔥 | 33.8 |
| August | 3.4 | 16.7 | 30 | 9.6 | 21.4 | 33.2 |
| September | -2.6 | 12.1 | 26.8 | 4.1 | 17.5 | 30.9 |
| October | -9 | 5.5 | 20.1 | -2.4 | 11.3 | 24.9 |
| November | -17.2 | -3.7 | 9.8 | -7.7 | 4.6 | 16.9 |
| December | -23.3 | -9.7 | 4 | -14.7 | -3 | 8.8 |
| Annual Avg | -10.1 | 4 | 18.2 | -4.7 | 8.5 | 21.8 |
Min / mean / max temperature (°C). 🔥 marks each city's hottest month, ❄️ its coldest; shading runs cool blue to warm red.
The same figures plotted out, so the shape of a typical year is easier to see than in a grid. Where the two lines run close together Calgary and Hamilton feel alike; where they separate, they are genuinely different places to be.
Hover or tap any point to read the exact figures. Calgary Hamilton
See how Calgary and Hamilton stack up against other cities. Swipe for more.
Choose which city to keep, then search for any other city in our database — we'll build the comparison for you.
Quick answers to the questions people ask most when comparing Calgary and Hamilton — each drawn straight from the climate figures above.
Hamilton is the warmer of the two. It averages daytime highs of 21.8°C (71.2°F) against 18.2°C (64.8°F) in Calgary — roughly 3.6°C (6.5°F) warmer by day. Nights are milder in Hamilton, with average lows of -4.8°C (23.4°F) versus -10.1°C (13.8°F).
Calgary is hottest in July, averaging highs of about 30.1°C (86.3°F), while Hamilton peaks in July at around 33.8°C (92.8°F). That makes Hamilton the hotter of the two at the height of summer.
Calgary gets colder. In its coldest month (January) overnight lows average about -25.1°C (-13.1°F), compared with -20.5°C (-4.9°F) at the low point of the year in Hamilton.
Hamilton is the wetter city, collecting about 718 mm (28.3 in) of rain a year versus 524 mm (20.6 in) in Calgary. Calgary is wettest in June and driest in January; Hamilton is wettest in July and driest in February.
Hamilton is the more humid of the two, averaging 77% relative humidity over the year against 71% in Calgary.
The most comfortable months in Calgary are June, July and August, when average temperatures are at their mildest.
Hamilton is at its most pleasant around June, July and August, based on the mildest average temperatures of the year.
Hamilton is the warmer city in all 12 months of the year. The gap is widest in November, about 8.3°C (14.9°F), and narrowest in February, about 1.4°C (2.5°F).
Hamilton has the bigger seasonal swing, about 29.1°C (52.4°F) between its coldest and hottest months versus 27.6°C (49.7°F) in Calgary — so Calgary has the steadier, more even climate.
It depends what matters most to you: choose Hamilton for warmer weather, pick Calgary if you prefer drier conditions and go for Calgary if you want lower humidity. There is no single "better" climate — it comes down to whether you value warmth, dryness or comfort most.
Every figure on this page is calculated from NASA POWER satellite climate data spanning 1981–2025 (45 years). The averages describe the long-term climate of Calgary and Hamilton, not a single year's weather or a short-range forecast.
