Exterior Painting Weather in District of Columbia: Best Months by City
Exterior Painting season in District of Columbia, city by city: peak months, season boundaries, and annual workable-day counts from NOAA 1991–2020 normals. Washington leads with 147 workable days a year.
District of Columbia's listed city has a exterior painting calendar of roughly 147 workable days a year, detailed month by month below — with a live 10-day check behind every link.
If one month anchors the District of Columbia calendar it's October, the statewide leader in workable days. Use this page to pick the month, then the city page's 10-day strip to pick the days — and the national exterior painting guide for the physics behind each rule.
Cities in District of Columbia
| City | Peak months | Season | Workable days/yr |
|---|---|---|---|
| Washington | Oct, Aug, Sep | April–October | 147 |
The rules behind these numbers
| Check | Threshold | Why it matters |
|---|---|---|
| Air temperature | 50–90°F (low-temp formulas from 35°F) | Standard latex wants 50°F+. Some low-temperature formulas are rated down to 35°F. |
| Overnight low | ≥35°F during the first 24 h (≥40°F preferred) | Paint keeps curing overnight; a low under 40°F stalls standard latex. |
| Dry before | ≤0.05" rain in the prior 12 h; watch back to 24 h | The surface must be dry to the touch and out of a recent soak. |
| Dry after | <0.05" rain for 24 h after | Rain inside the first 24 hours can streak or wash fresh paint. |
| Evening dew-point spread | ≥5°F from 6–11 pm | Surface should stay at least 5°F above the dew point; dew flat-spots fresh paint. |
| Daytime humidity | ≤80% | High humidity extends recoat and cure times. |
| Wind | ≤15 mph (brush only up to 20 mph) | Wind dries the leading edge too fast and carries overspray. |
Always follow your product label — formulas vary. The table above is the typical range across major manufacturers, not a promise about your can.
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