Penticton weather
Penticton weather and what it does to your roof
Penticton is hot and dry. At Penticton Regional Airport (1991–2020 normals) precipitation averages 344.1 mm a year, the average July high is 29.2 °C, and the record is 44.2 °C, set on June 30, 2021. Wildfire is the hazard that matters most: FireSmart BC records the 1994 Garnet and 2020 Mt. Christie fires.
Reviewed by Scott Plumptree, Director of Marketing, The Interlock Group · Updated October 24, 2026
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Annual precipitation
344.1 mm (293.3 mm of it rain), Penticton Regional Airport, 1991–2020
Wikipedia, Penticton (ECCC normals)
July average high
29.2 °C; record 44.2 °C on June 30, 2021
Wikipedia, Penticton (ECCC normals)
Snowfall
61.6 cm a year, 27.9 snowy days
Wikipedia, Penticton (ECCC normals)
Sunshine
1,923.3 hours a year
Wikipedia, Penticton (ECCC normals)
Wildfire history
1994 Garnet and 2020 Mt. Christie wildfires
FireSmart BC
Penticton Regional Airport's numbers
The city sits between Okanagan Lake to the north and Skaha Lake to the south. Its climate normals come from Penticton Regional Airport, 1991–2020: 120.2 days a year with measurable precipitation, 99.3 of them with rain. January averages a high of 1.6 °C and a low of −3.2 °C. The coldest reading on record there is −27.6 °C, on January 13, 2024.
Sun and heat on a Penticton roof
The airport logs 1,923.3 hours of sunshine a year, 39.6% of the possible total. On a roof facing south or west, that sun does more wear than the rain does. Asphalt shingles lose granules and turn brittle; cedar dries, splits and cups.
Interlock® aluminum shingles have no asphalt and no wood fibre in them, and aluminum cannot rust.
Wildfire around Penticton, Kaleden and Okanagan Falls
FireSmart BC describes Penticton as a city with "a history of frequent wildfires" and notes that new neighbourhoods keep spreading into the wildland-urban interface. In 2021 the Penticton Fire Department set up a FireSmart team that does home assessments and helps residents clear fuel near their houses.
Outside the city, the RDOS is writing Community Wildfire Resiliency Plans. Okanagan Falls (Area "D") had an open house at its fire hall on June 21, 2025, and Kaleden (Area "I") had one at the Kaleden Fire Hall on November 15, 2025, for what the RDOS calls "a five-year action plan designed to reduce wildfire risk."
What a Penticton roof can and can't do in fire season
We offer Class A Fire Rated Available, as a complete assembly, and the aluminum itself does not ignite. FireSmart BC's manual explains that roofing is rated Class A, B or C, and points out that burning debris from a fire can travel as far as two kilometres in front of it. No roof is fireproof, and embers land in gutters, vents and the dry needles beside the house.
- Empty the gutters several times through the summer, not just in the fall
- Screen vents with three-millimetre non-combustible wire mesh
- Keep a 1.5-metre non-combustible zone around the house
Snow and winter on a Penticton roof
The airport averages 61.6 cm of snow a year. That is not much, but a metal roof drops it in one slide instead of letting it melt in place, so snow guards are planned at the estimate wherever it would land on steps, a deck or the driveway.
Ice damming comes from heat escaping through the attic, and it is a warranty exclusion, so we check attic venting at the same visit. For wind, the roof is warranted to 193 km/h (120 mph), installed to manufacturer specification.
Penticton questions, answered
Does Penticton's heat hurt a metal roof?
No. Aluminum has nothing in it that heat dries out, and it cannot rust. The airport's record of 44.2 °C in June 2021 is the kind of week that curls asphalt shingles and splits cedar. What wears a metal roof out here is neglect at the edges: gutters and valleys that fill with needles, so those are worth a look each summer.
Who does FireSmart home assessments in Penticton?
The Penticton Fire Department's FireSmart team, set up in 2021. FireSmart BC reported that by January 31, 2022 it had completed 100 home assessments and helped remove about 18,250 kg of hazardous fuel from around homes. Kaleden and Okanagan Falls fall under the RDOS wildfire planning instead.
Will snow slide off a metal roof onto my deck?
It can. Penticton averages 61.6 cm of snow a year, and on aluminum it lets go in one slide. When we measure the roof we mark where a slide would land on a deck, stairs or a parked car, and the snow guards go into the written estimate.
Sources for this Penticton guide
- FireSmart BC — FireSmart in action: City of Penticton
- Regional District of Okanagan-Similkameen — Community Wildfire Resiliency Plan open house events (2025)
- Regional District of Okanagan-Similkameen — Community Wildfire Resiliency Plan Open House, Electoral Area "I" (November 15, 2025)
- FireSmart BC — Homeowner's Manual
- Wikipedia — Penticton (climate normals, Penticton Regional Airport, 1991–2020)
Product specifications are the manufacturer's (Interlock Roofing). Install counts are from our own job book. Reviewed by Scott Plumptree, October 24, 2026.
More Penticton roofing pages
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