Paint Application Temperature Guide

Paint needs the right temperature to cure properly. Minimum and ideal air and surface temperatures for exterior and interior painting.

Painting temperatures

Product	Minimum	Ideal range
Latex (acrylic) exterior paint	50 °F (10 °C) (some down to 35 °F)	50–85 °F (10–29 °C)
Oil-based paint	40–45 °F (4–7 °C)	50–90 °F (10–32 °C)
Exterior stain	50 °F (10 °C)	50–90 °F (10–32 °C)
Primer	35–50 °F (2–10 °C)	50–85 °F (10–29 °C)
Interior paint	50 °F (10 °C)	60–80 °F (16–27 °C)

Notes

Check that both the air and the surface stay above the minimum for 24–48 hours while the paint cures — surfaces in shade or at night can be colder than the air. Avoid painting above about 90 °F or in direct midday sun, which dries paint too fast and causes lap marks and blistering. Keep relative humidity under about 85% and the surface at least 5 °F above the dew point so dew does not form on wet paint.

Frequently asked questions

How cold is too cold to paint outside?

Below 50 °F for most latex paints, unless the can says low-temperature formula (down to 35 °F).

Can I paint in 90 °F weather?

Avoid it — paint dries too fast; paint in the shade or early morning.

How long does paint need to cure before rain?

Usually 2–4 hours to be rain-safe; check the label.

Does humidity affect paint?

Yes — high humidity slows drying and can cause surfactant leaching on latex.