Is it good to paint in Provo, UT this week?
A live 7-day go/no-go calendar for exterior paint in Provo, 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
- 11.3°F
- Overnight dew
- Low
- Rain
- 4%
- Window
- 10am–5pm
High humidity (93%, over the 85% mark) slows drying — keep an eye on the cure window.
- Dew margin
- 24.6°F
- Overnight dew
- Low
- Rain
- 1%
- Window
- 8am–5pm
Clear to paint: temps 51–78°F, RH under 65%, surface stays 24.6°F+ above the dew point, no rain in the cure window.
- Dew margin
- 21.7°F
- Overnight dew
- Low
- Rain
- 0%
- Window
- 8am–5pm
Clear to paint: temps 56–78°F, RH under 40%, surface stays 21.7°F+ above the dew point, no rain in the cure window.
- Dew margin
- 23.5°F
- Overnight dew
- Low
- Rain
- 0%
- Window
- 8am–5pm
Clear to paint: temps 62–84°F, RH under 37%, surface stays 23.5°F+ above the dew point, no rain in the cure window.
- Dew margin
- 22.5°F
- Overnight dew
- Low
- Rain
- 0%
- Window
- 8am–5pm
Clear to paint: temps 65–85°F, RH under 31%, surface stays 22.5°F+ above the dew point, no rain in the cure window.
- Dew margin
- 23.6°F
- Overnight dew
- Low
- Rain
- 4%
- Window
- 8am–5pm
Hot afternoon (85°F, ceiling 85°F) — paint early and follow the shade.
- Dew margin
- 11.5°F
- Overnight dew
- Low
- Rain
- 5%
- Window
- —
Rain likely in the 24h cure window (5% chance, ~1.2mm) — it can wash out or mar an uncured paint.
- High humidity (93%, over the 85% mark) slows drying — keep an eye on the cure window.
Caution. 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.