Is it good to paint in Asheville, NC this week?
A live 7-day go/no-go calendar for exterior paint in Asheville, 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
- 5°F
- Overnight dew
- Low
- Rain
- 11%
- Window
- 9am–5pm
Clear to paint: temps 59–84°F, RH under 85%, surface stays 5°F+ above the dew point, no rain in the cure window.
- Dew margin
- 0.3°F
- Overnight dew
- High
- Rain
- 91%
- Window
- —
High condensation risk overnight — surface dips to within 0.3°F of the 66°F dew point (low 62°F, 100% cloud, 4 mph wind). A fresh paint can blush/blister. Stop 4h before dew falls.
- Dew margin
- -1.8°F
- Overnight dew
- High
- Rain
- 72%
- Window
- —
High condensation risk overnight — surface dips to within -1.8°F of the 61°F dew point (low 59°F, 100% cloud, 2 mph wind). A fresh paint can blush/blister. Stop 4h before dew falls.
- Dew margin
- -6.6°F
- Overnight dew
- High
- Rain
- 18%
- Window
- —
High condensation risk overnight — surface dips to within -6.6°F of the 60°F dew point (low 49°F, 81% cloud, 2 mph wind). A fresh paint can blush/blister. Stop 4h before dew falls.
- Dew margin
- -4.6°F
- Overnight dew
- High
- Rain
- 1%
- Window
- —
High condensation risk overnight — surface dips to within -4.6°F of the 44°F dew point (low 39°F, 100% cloud, 3 mph wind). A fresh paint can blush/blister. Stop 4h before dew falls.
- Dew margin
- -1.3°F
- Overnight dew
- High
- Rain
- 4%
- Window
- —
High condensation risk overnight — surface dips to within -1.3°F of the 48°F dew point (low 47°F, 8% cloud, 2 mph wind). A fresh paint can blush/blister. Stop 4h before dew falls.
- Dew margin
- -1.3°F
- Overnight dew
- High
- Rain
- 5%
- Window
- —
High condensation risk overnight — surface dips to within -1.3°F of the 55°F dew point (low 53°F, 100% cloud, 1 mph wind). A fresh paint can blush/blister. Stop 4h before dew falls.
- Clear to paint: temps 59–84°F, RH under 85%, surface stays 5°F+ above the dew point, no rain in the cure window.
Good to go. 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.
Free in the beta
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.