So when will it warm up? (There it is again!) Very soon. Montreal is still on track for a very warm summer. The long-range forecast is hinting at well-above-normal temperatures for Quebec and the Northeast US for July though August. In the short term, we have a few more cool days, as strong arctic high pressure controls our weather. Milder air will arrive by Sunday, along with an increase in clouds and some much-needed rainfall. The wet weather and warmer temperatures will continue into the first week of May.