Weather in Lethbridge in March

A hard month. March asks something of you. Go in knowing what. Highs sit at 6.1 °C and the day is short; this is an indoors-with-excursions month, not an outdoors-all-day one.

March ranks 8 of 12 in Lethbridge: past the worst of the year but short of August, which is the month to book if the dates are open.

Rain on 9 days, 0 of them heavy. Enough to need a plan B, not enough to need a plan around it. Layers, and a genuinely waterproof outer — at 6.1 °C the difference between a good day and a miserable one is entirely down to what you are wearing.

What the averages hide

Averages flatten a month, and this one hides a few things: 26 nights drop below freezing, so anything left outside stays frozen. Across the twenty years measured, the hottest March day reached 25.5 °C and the coldest night fell to -29.1 °C.

March is statistically steady but not small: the year-to-year variation is modest in relative terms, yet the wettest March on record still delivered 44 mm against 12 mm in the driest. In a month this wet, even a tame spread is a lot of rain in absolute terms — the 29 mm average is a reasonable planning figure, not a promise.

Wind is light at 12.3 km/h, so the temperature on the page is close to the temperature on your skin, and humidity is unremarkable at 73%.

How March sits in the year

The month is on the way up: 5.7 °C warmer than February, and April adds another 5.7 °C. Late in the month feels noticeably different from the start of it, which is worth knowing if the trip is short.

Daylight in March

11.8 hours of daylight, gaining 1.9 hours across the month. That is between Lethbridge's extremes of 16.3 and 8.2 hours, so days are long enough not to constrain the plan.

An inland climate

With no coast nearby, the year swings a fair way — 37 °C between the warmest afternoons and the coldest nights, wider than any coastal city at this latitude would manage. At 907 m the air is thin enough to matter — sun that burns faster than the temperature suggests, and nights that cool off quickly.

How busy it gets

Off season. The genuine off season: cheapest by a distance, with the caveat that some tours and restaurants close entirely.

Crowd levels are estimated from climate desirability and school-holiday calendars, not from visitor numbers.

March in Lethbridge versus nearby

If Lethbridge is one option among several, the nearby comparison is worth making. Calgary is close enough to be a coin toss — within a degree on temperature, 1 day less rain. Banff is the weaker option in March — 6.5 °C cooler, 9 days more rain.

So: March is a compromise. August is 52 points better and is what Lethbridge is actually like at its best — worth moving the trip for if that is possible, and worth adjusting expectations for if it is not.

Every month in Lethbridge

See all twelve months in Lethbridge, or where else to go in March.