Ottawa's May Bucked the Trend This Year
Ottawa wrapped up May 2026 on the chilly and dry side, with temperatures and precipitation both coming in below historical averages for the month — a notable contrast to the warm, wet springs the city has seen in recent years.
While Ottawans may have been reaching for their jackets longer than expected, meteorologists say this kind of variability is well within the range of normal climate patterns for the region, even if it didn't feel that way when you were waiting for patio season to properly kick off.
The Numbers Behind the Chill
According to CTV News Ottawa, the city recorded cooler-than-average daytime highs throughout much of the month, with several stretches of below-normal temperatures keeping spring firmly in "sweater weather" territory well into late May.
Precipitation also fell short of what's typical for this time of year. Normally, May brings a reliable mix of showers that help green up the city's parks and green spaces — but this year, several parts of Ottawa saw notably less rainfall, leaving lawns a little slower to fill in and gardeners keeping a closer eye on their hoses.
The combination of cool temperatures and reduced moisture creates a distinct feeling: the calendar says spring, but the vibe outside is something closer to a prolonged April.
What This Means for Ottawa Residents
For everyday Ottawans, the cooler May had a few practical ripple effects. Patio openings at many of the city's restaurants and bars along Bank Street, the Glebe, and Westboro felt a bit muted compared to previous years, with some spots holding off on full outdoor service until conditions warmed up.
Gardeners in Ottawa's many community plots and backyard gardens may have noticed slower germination for warm-season crops like tomatoes and peppers, which prefer consistent warmth to get established.
On the upside, cooler May temperatures can be a blessing for those who dread Ottawa's notoriously humid summers — a slower warm-up sometimes means the oppressive heat arrives a little later in the season.
Looking Ahead to Summer
The big question on everyone's mind: does a cool May mean a cool summer? Climate experts generally caution against drawing a straight line between one month's anomaly and the season ahead. Weather patterns in the Ottawa Valley are shaped by a complex mix of jet stream behaviour, Great Lakes influence, and broader atmospheric conditions that don't always follow predictable month-to-month patterns.
That said, Environment and Climate Change Canada's seasonal outlooks are worth keeping an eye on as June gets underway. For now, Ottawa residents can take some comfort in knowing that June historically brings warmer, more settled weather — and that patio season, delayed as it may feel, is very much still coming.
In the meantime, it might be worth leaving that light jacket somewhere accessible for a few more weeks.
Source: CTV News Ottawa via Google News
