Is it good to stain in St. Petersburg, FL this week?
A live 7-day go/no-go calendar for deck & fence stain in St. Petersburg, 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
- 3.4°F
- Overnight dew
- High
- Rain
- 25%
- Window
- —
High condensation risk overnight — surface dips to within 3.4°F of the 74°F dew point (low 77°F, 0% cloud, 4 mph wind). A fresh stain can blush/blister. Stop 4h before dew falls.
- Dew margin
- 5.2°F
- Overnight dew
- Low
- Rain
- 10%
- Window
- 9am–5pm
Hot afternoon (94°F, ceiling 90°F) — stain early and follow the shade.
- Dew margin
- 7.7°F
- Overnight dew
- Low
- Rain
- 41%
- Window
- —
Rain likely in the 24h cure window (41% chance, ~3.8mm) — it can wash out or mar an uncured stain.
- Dew margin
- 6.3°F
- Overnight dew
- Low
- Rain
- 58%
- Window
- —
Rain likely in the 24h cure window (58% chance, ~6.2mm) — it can wash out or mar an uncured stain.
- Dew margin
- 8.4°F
- Overnight dew
- Low
- Rain
- 36%
- Window
- 8am–5pm
Hot afternoon (91°F, ceiling 90°F) — stain early and follow the shade.
- Dew margin
- 8.3°F
- Overnight dew
- Low
- Rain
- 37%
- Window
- —
Rain likely in the 24h cure window (37% chance, ~1.2mm) — it can wash out or mar an uncured stain.
- Dew margin
- 9.8°F
- Overnight dew
- Low
- Rain
- 46%
- Window
- —
Rain likely in the 24h cure window (46% chance, ~2.4mm) — it can wash out or mar an uncured stain.
- High condensation risk overnight — surface dips to within 3.4°F of the 74°F dew point (low 77°F, 0% cloud, 4 mph wind). A fresh stain can blush/blister. Stop 4h before dew falls.
- Hot afternoon (93°F, ceiling 90°F) — stain early and follow the shade.
Hold off. These are forecast numbers — confirm the surface temperature on-site before you start.
Why these thresholds
Stain applied to a damp or dew-wet board can't penetrate — it beads, stays tacky and flakes. Wood must be dry and stay above the dew point while it sets.
- • Surface temp must stay 5°F above the dew point through application and cure (ASTM D3276 / ISO 8502-42).
- • Air + surface in the 50–90°F band (low-temp lines to 45°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.