Ottawa has just recorded its wettest month ever, with the city's airport measuring 259.9 mm of rain as of the afternoon of July 28 — enough to break a record that had stood for nearly a decade.

The previous mark was set in July 2017, when 249.8 mm of rain fell. Records at the airport date back to 1938, according to The Weather Network.

How the record fell

The record was sealed Tuesday, when slow-moving storms meandered across southern and eastern Ontario. A stalled, upper-level trough parked over the region has been pulling heavy rain across the area all week, according to The Weather Network.

The rainfall has come in bursts rather than one single event, with repeated rounds of showers and thunderstorms adding to the monthly total since the beginning of July.

More wet weather expected Wednesday and Thursday

The soggy pattern isn't over yet. Forecasters say the Ottawa area and southern Quebec could see another day of wet, stormy weather on Wednesday, as moisture streaming up from the Gulf of Mexico feeds torrential rain into parts of southern Quebec.

The biggest concern, according to The Weather Network, is that storms repeatedly pass over the same locations, causing rainfall totals to climb rapidly. That could bring localized flooding, low visibility and dangerous driving conditions.

Showers and heavy rain are forecast to continue into Wednesday and Thursday, with a growing chance of lighter, lingering precipitation later in the week. Thunderstorms remain possible again, with severe storms expected to stay east of the low, running south to north.

Flooding is expected to remain a concern for the Ottawa Valley and the Laurentians.

A break — then maybe more rain

While it will feel muggy outside, temperatures through the rest of the week should actually sit at or below seasonal values.

Conditions are expected to gradually improve Thursday into Friday, offering the region its first real stretch of drying in days.

But residents planning to get away may want to keep the umbrella handy. More rain is possible across Ontario over the August long weekend, according to The Weather Network.