Timing Your Exterior Painting Job
Exterior painting is weather-dependent in a way interior work isn't. Get the timing wrong and the paint won't adhere properly, dries unevenly, or fails within a couple of years. Get it right and a quality exterior paint job should last 8–15 years.
The Ideal Conditions for Exterior Painting
Most exterior paints have minimum application temperatures of 5°C to 10°C, with an ideal range of 10–25°C. You also need:
- Dry weather for at least 48 hours before and during painting
- Low humidity — paint applied in damp conditions blisters and peels
- No direct, harsh sunlight — paint dries too quickly and streaks
- Low wind — wind carries dust onto wet paint and dries it unevenly
Best Months in the UK
May to September is the prime exterior painting window in the UK. June, July and August offer the most reliably warm and dry conditions. Spring (April–May) and early autumn (September) can also work well but require more flexibility around the weather forecast.
Months to Avoid
- October to March — too cold and wet for most exterior paints
- During a heatwave — temperatures above 30°C cause paint to dry too fast
- During rainy spells — obvious, but even painting on a day before predicted rain is risky
What About Masonry Paint vs Wood Paint?
Masonry paint (for rendered or brick walls) is more forgiving and some modern formulations can be applied down to 2°C. Wood paint and stain (for fascias, soffits, window frames, doors) are more temperature-sensitive and really need temperatures above 8°C and falling humidity.
Planning Tips
- Book your decorator in March or April for a May/June start — summer slots fill up fast
- Build at least a week's flexibility into the schedule for weather delays
- Ask the decorator what paint brand and formulation they use — some handle UK weather better than others
- If scaffolding is needed, factor in extra lead time and cost
Ready to get your exterior repainted this summer? Get free quotes from local decorators now.