Is it good to paint in Anchorage, AK this week?
A live 7-day go/no-go calendar for exterior paint in Anchorage, 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
- 3°F
- Overnight dew
- High
- Rain
- 49%
- Window
- —
High condensation risk overnight — surface dips to within 3°F of the 46°F dew point (low 49°F, 16% cloud, 5 mph wind). A fresh paint can blush/blister. Stop 4h before dew falls.
- Dew margin
- 10.5°F
- Overnight dew
- Low
- Rain
- 29%
- Window
- 8am–5pm
Clear to paint: temps 58–64°F, RH under 62%, surface stays 10.5°F+ above the dew point, no rain in the cure window.
- Dew margin
- -1°F
- Overnight dew
- High
- Rain
- 70%
- Window
- —
High condensation risk overnight — surface dips to within -1°F of the 43°F dew point (low 40°F, 2% cloud, 1 mph wind). A fresh paint can blush/blister. Stop 4h before dew falls.
- Dew margin
- 3.6°F
- Overnight dew
- High
- Rain
- 6%
- Window
- —
High condensation risk overnight — surface dips to within 3.6°F of the 47°F dew point (low 50°F, 36% cloud, 6 mph wind). A fresh paint can blush/blister. Stop 4h before dew falls.
- Dew margin
- 9.3°F
- Overnight dew
- Low
- Rain
- 12%
- Window
- 8am–5pm
Clear to paint: temps 55–62°F, RH under 67%, surface stays 9.3°F+ above the dew point, no rain in the cure window.
- Dew margin
- 9.7°F
- Overnight dew
- Low
- Rain
- 23%
- Window
- 8am–5pm
Clear to paint: temps 54–65°F, RH under 64%, surface stays 9.7°F+ above the dew point, no rain in the cure window.
- Dew margin
- 7.6°F
- Overnight dew
- Low
- Rain
- 31%
- Window
- —
Rain likely in the 24h cure window (31% chance, ~1.3mm) — it can wash out or mar an uncured paint.
- High condensation risk overnight — surface dips to within 3°F of the 46°F dew point (low 49°F, 16% cloud, 5 mph wind). A fresh paint can blush/blister. Stop 4h before dew falls.
- Rain likely in the 24h cure window (49% chance, ~1.6mm) — it can wash out or mar an uncured paint.
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.
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.