Is it good to paint in Atlanta, GA this week?
A live 7-day go/no-go calendar for exterior paint in Atlanta, built from the local forecast against the 5°F-above-dew-point rule. We lead with the signal a weather app misses: overnight condensation risk.
- Dew margin
- 0.2°F
- Overnight dew
- High
- Rain
- 2%
- Window
- —
High condensation risk overnight — surface dips to within 0.2°F of the 64°F dew point (low 64°F, 14% cloud, 3 mph wind). A fresh paint can blush/blister. Stop 4h before dew falls.
- Dew margin
- -4.9°F
- Overnight dew
- High
- Rain
- 19%
- Window
- —
High condensation risk overnight — surface dips to within -4.9°F of the 70°F dew point (low 65°F, 100% cloud, 3 mph wind). A fresh paint can blush/blister. Stop 4h before dew falls.
- Dew margin
- 2°F
- Overnight dew
- High
- Rain
- 69%
- Window
- —
High condensation risk overnight — surface dips to within 2°F of the 69°F dew point (low 71°F, 100% cloud, 3 mph wind). A fresh paint can blush/blister. Stop 4h before dew falls.
- Dew margin
- -0.3°F
- Overnight dew
- High
- Rain
- 77%
- Window
- —
High condensation risk overnight — surface dips to within -0.3°F of the 66°F dew point (low 65°F, 100% cloud, 6 mph wind). A fresh paint can blush/blister. Stop 4h before dew falls.
- Dew margin
- -2.7°F
- Overnight dew
- High
- Rain
- 37%
- Window
- —
High condensation risk overnight — surface dips to within -2.7°F of the 63°F dew point (low 60°F, 40% cloud, 7 mph wind). A fresh paint can blush/blister. Stop 4h before dew falls.
- Dew margin
- 9.5°F
- Overnight dew
- Low
- Rain
- 13%
- Window
- 1pm–5pm
High humidity (93%, over the 85% mark) slows drying — keep an eye on the cure window.
- Dew margin
- 20.2°F
- Overnight dew
- Low
- Rain
- 13%
- Window
- 8am–5pm
Clear to paint: temps 60–76°F, RH under 54%, surface stays 20.2°F+ above the dew point, no rain in the cure window.
- High condensation risk overnight — surface dips to within 0.2°F of the 64°F dew point (low 64°F, 14% cloud, 3 mph wind). A fresh paint can blush/blister. Stop 4h before dew falls.
- High humidity (95%, over the 85% mark) slows drying — keep an eye on the cure window.
Hold off. These are forecast numbers — confirm the surface temperature on-site before you start.
Why these thresholds
Overnight dew condensing on a fresh coat causes blistering, surfactant leaching and peeling — the cause of 40%+ of exterior paint failures.
- • Surface temp must stay 5°F above the dew point through application and cure (ASTM D3276 / ISO 8502-42).
- • Air + surface in the 50–85°F band (low-temp lines to 35°F).
- • Humidity under 85%; ideally under 70%.
- • No rain for 24h after application.
- • We use the forecast ground-surface temperature as a surface-temp proxy — confirm on-site with an IR thermometer.
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Watch this job site 24/7
Get an email the moment overnight dew, rain, or an out-of-range stretch threatens a fresh coat — and a morning digest with the best window ahead. No app to check; we watch the forecast for you.