Alberta weather in May
May is a fair month to visit Alberta: highs of 15°C (59°F) and about 73 mm (2.9 in) of rain on average. Nights average 2°C (36°F) and cloud cover 70% (NASA POWER, 2001–2025 averages). It is the 2nd wettest month of the year and the 5th warmest. Compared with April, it is warmer and wetter; June brings highs of 19°C (66°F) and 115 mm (4.5 in) of rain.
Figures are long-term averages for Calgary, the largest city in Alberta. See below for other places.
Is May a good time to visit Alberta?
fair month Weather score 59/100.
May is a fair month in Alberta. The weather is usually best in Jul–Sep.
Does it rain a lot in Alberta in May?
Some rain is normal: about 73 mm (2.9 in) falls in an average May. It is the 2nd wettest month of the year.
How warm is Alberta in May?
Days average 15°C (59°F) and nights 2°C (36°F).
Alberta weather by month
| Month | High | Low | Rain | Cloud | Weather |
|---|---|---|---|---|---|
| January | -3°C (27°F) | -11°C (11°F) | 17 mm | 70% | least pleasant |
| February | -2°C (29°F) | -12°C (10°F) | 21 mm | 69% | least pleasant |
| March | 3°C (37°F) | -8°C (17°F) | 26 mm | 72% | least pleasant |
| April | 9°C (47°F) | -3°C (26°F) | 46 mm | 72% | least pleasant |
| May | 15°C (59°F) | 2°C (36°F) | 73 mm | 70% | fair |
| June | 19°C (66°F) | 7°C (44°F) | 115 mm | 70% | fair |
| July | 24°C (74°F) | 10°C (50°F) | 58 mm | 56% | best |
| August | 22°C (72°F) | 9°C (47°F) | 61 mm | 56% | best |
| September | 17°C (62°F) | 4°C (39°F) | 53 mm | 62% | best |
| October | 9°C (48°F) | -2°C (28°F) | 32 mm | 68% | least pleasant |
| November | 1°C (34°F) | -7°C (19°F) | 23 mm | 71% | least pleasant |
| December | -4°C (26°F) | -12°C (11°F) | 21 mm | 68% | least pleasant |
Sources: 2001–2025 monthly averages from NASA POWER (MERRA-2 reanalysis). Page updated . How we rate months
Weather across Alberta in May
Weather can differ a lot within Alberta: coasts, hills and mountains each have their own climate.
| Place | High | Low | Rain | Weather |
|---|---|---|---|---|
| Calgary | 15°C (59°F) | 2°C (36°F) | 73 mm | fair |
| Banff | 8°C (47°F) | -2°C (29°F) | 83 mm | least pleasant |
| Edmonton | 17°C (62°F) | 4°C (40°F) | 64 mm | fair |
| Lethbridge | 17°C (63°F) | 4°C (40°F) | 64 mm | fair |
| Red Deer | 16°C (61°F) | 4°C (39°F) | 68 mm | fair |
| Airdrie | 17°C (62°F) | 4°C (39°F) | 65 mm | fair |
| Sherwood Park | 17°C (62°F) | 4°C (40°F) | 59 mm | fair |
| Grande Prairie | 16°C (60°F) | 4°C (38°F) | 60 mm | fair |
| Fort McMurray | 15°C (60°F) | 3°C (37°F) | 59 mm | fair |
| Medicine Hat | 19°C (65°F) | 6°C (42°F) | 50 mm | best |
| St. Albert | 17°C (62°F) | 4°C (40°F) | 64 mm | fair |
| Centre City | 15°C (59°F) | 2°C (36°F) | 73 mm | fair |