What Preston weather does to a conservatory
The grid reads like a calendar turned on its side: months down, hours across, colour for the average room temperature. Preston's warmest month outdoors was August at 16.6°C on average, with a top of 28°C, yet a polycarbonate conservatory peaked at 45°C because the roof traps the midday sun.
A year inside a Preston conservatory
Average room temperature, every month and hour of 2024 and 2025
- 1,182
- hours over 25°C
- 45°C
- hottest hour
- 31°C
- July, 3pm
- 1,338
- hours over 25°C
- 48°C
- hottest hour
- 32°C
- July, 3pm
- 191
- hours over 25°C
- 32°C
- hottest hour
- 24°C
- July, 3pm
Blue: heater weatherPale: comfortableAmber to plum: too warm
The hours you get back
A heater can rescue a chilly hour. Nothing cheap rescues a 31°C one. So the useful measure is how many waking hours stay at or under 25°C: in Preston that is 3,932 a year under polycarbonate and 4,921 under an insulated panel roof, roughly 989 hours handed back.
The worst hours, above 30°C, fall from 431 to 8. A glass roof manages 606.
- Polycarbonate roof1,182 h too warm
- Glass roof1,338 h too warm
- Panel roof191 h too warm
Too cold (under 12°C)Chilly (12 to 17°C)Comfortable (17 to 25°C)Warm (25 to 28°C)Too hot (over 28°C)
When the heat peaks in Preston
June is the problem month here: 36% of its waking hours top 28°C under polycarbonate, 2% under panels. Spring and early autumn matter too, when the sun is still strong but nobody expects to open the doors.
Polycarbonate roofInsulated panel roof
Winter in Preston
Winter here bottoms out in January at an average of 3.9°C (coldest hour -7.4°C). Keeping 19°C while the room is in use costs about £453 a year in electricity under polycarbonate and £378 under the panel roof, 1,722 against 1,438 kWh.
We would not sell the roof on that difference alone. The glass walls keep losing heat either way; what changes most is that the room stops cooking in summer and a smaller heater copes in winter.
Prices for Preston conservatory roofs
There is no Preston premium: size and shape decide the price. The survey is free and the written price is fixed. See the price page for every shape, or get a guide price for your roof in about a minute.
| Shape | Small (up to 12 m²) | Medium (12 to 25 m²) | Large (over 25 m²) |
|---|---|---|---|
| Lean-to | from £3,000 | from £4,000 | from £5,000 |
| Edwardian | from £3,150 | from £4,200 | from £5,250 |
| Victorian | from £3,300 | from £4,400 | from £5,500 |
Fitting day
Plan on a single day for most Preston roofs, usually a second for a P-shape. We take the old roof away the same day and leave the room swept. The fitting day walks through it hour by hour.
Towns near Preston
Compare your neighbours, or see all of the North West and the full overheating league table.