Two temperature limits on every can
Paint has a comfortable range. Below it, latex can't form a proper film: it may look fine for a week and then crack or wash off. Above it, especially on a wall baking in direct sun, paint can dry so fast that brush marks and lap lines lock in and the coat never bonds the way it should. Almost every exterior label states a minimum temperature, and many warn against painting surfaces that are hot to the touch. Planning a Monroe job means planning around both ends.
NOAA's count at Monroe Regional Airport
NOAA's current climate normals for the Monroe Regional Airport station count about 96.7 days a year with a high of 90°F or more and about 32.7 days with a low of 32°F or less. The station's engineering weather data, under the name Monroe, adds about 24 freeze-thaw cycles in an average year, a 100-year rainfall rate of 4.0 inches per hour, and a 50-year basic wind speed of 90 mph (3-second gust at 33 feet). Each figure is printed in full on the cards below, with its source.
Working around hot days
On a day that reaches 90°F, the air may be within a paint's range while the siding facing the afternoon sun is well past it. Painters handle that by following the shade:
- east-facing walls in the morning, once dew has dried;
- north-facing walls through the middle of the day;
- west-facing walls late, after the sun has left them and the surface has cooled;
- doors and trim at the cooler ends of the day, because glossier paints show lap marks first.
Ask the painter how they'll sequence the walls, and whether they check surface temperature or rely on the air temperature alone.
Working around freezing lows
The minimum on a label usually covers the surface and the air for some hours after application, not only the moment the brush touches the wall. A warm afternoon followed by a night with a low of 32°F or less can still hurt a fresh coat. Some products are made for lower temperatures; others are not. A painter planning cold-season exterior work should name the product and its stated minimum, and should be willing to stop when the overnight low is below it.
What freeze-thaw does to an old paint job
Each of those about 24 freeze-thaw cycles is a chance for water in a crack, a gap in caulk or a split in a board to freeze, expand and pry the paint loose. You see the result as paint lifting at board ends, around nail heads and along the bottom of trim. Before repainting, those spots need scraping to a firm edge, any soft wood repaired, and fresh caulk where joints have opened. Our exterior painting page covers each step.
Rain on a fresh coat
A design rainfall rate of 4.0 inches per hour is about how hard rain can fall in a rare storm, not how often it rains. For a painter, the everyday lesson is simpler: latex needs some hours without rain after it goes on. Ask how the crew decides whether to start when rain is possible later in the day, and what happens if a shower arrives early.
The Louisiana card
The card below quotes R.S. 37:2150.1 as published, with its $7,500 project-value mark for home improvement contracting on an existing residence, and the board's statement that a residential license applies to home improvement projects over $50,000. We don't apply it to any one paint job.
Scheduling questions for a Monroe painter
- Which months do you prefer for exterior work, and why?
- What surface temperature range will you paint within?
- How do you protect a fresh coat if the forecast changes?
- Will interior rooms be done first if the weather turns?
Our interior painting page is useful if you decide to bring indoor rooms forward while you wait for the right outdoor stretch.