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
- -2.3°F
- Overnight dew
- High
- Rain
- 47%
- Window
- —
High condensation risk overnight — surface dips to within -2.3°F of the 29°F dew point (low 26°F, 46% cloud, 3 mph wind). A fresh paint can blush/blister. Stop 4h before dew falls.
- Dew margin
- -5.4°F
- Overnight dew
- High
- Rain
- 0%
- Window
- —
High condensation risk overnight — surface dips to within -5.4°F of the 31°F dew point (low 25°F, 2% cloud, 3 mph wind). A fresh paint can blush/blister. Stop 4h before dew falls.
- Dew margin
- 2.9°F
- Overnight dew
- Watch
- Rain
- 35%
- Window
- —
Too cold to paint — daytime high only 45°F, below the 50°F minimum (even a low-temp line needs 35°F+).
- Dew margin
- -0.9°F
- Overnight dew
- High
- Rain
- 75%
- Window
- —
High condensation risk overnight — surface dips to within -0.9°F of the 39°F dew point (low 38°F, 88% cloud, 4 mph wind). A fresh paint can blush/blister. Stop 4h before dew falls.
- Dew margin
- -3.2°F
- Overnight dew
- High
- Rain
- 52%
- Window
- —
High condensation risk overnight — surface dips to within -3.2°F of the 37°F dew point (low 34°F, 100% cloud, 2 mph wind). A fresh paint can blush/blister. Stop 4h before dew falls.
- Dew margin
- -3.2°F
- Overnight dew
- High
- Rain
- 40%
- Window
- —
High condensation risk overnight — surface dips to within -3.2°F of the 38°F dew point (low 34°F, 98% cloud, 1 mph wind). A fresh paint can blush/blister. Stop 4h before dew falls.
- Dew margin
- 0.2°F
- Overnight dew
- High
- Rain
- 45%
- Window
- —
High condensation risk overnight — surface dips to within 0.2°F of the 39°F dew point (low 39°F, 94% cloud, 3 mph wind). A fresh paint can blush/blister. Stop 4h before dew falls.
- High condensation risk overnight — surface dips to within -2.3°F of the 29°F dew point (low 26°F, 46% cloud, 3 mph wind). A fresh paint can blush/blister. Stop 4h before dew falls.
- Too cold to paint — daytime high only 42°F, below the 50°F minimum (even a low-temp line needs 35°F+).
- Some rain risk (47%) during the cure window — re-check the radar before you start.
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.