Heat Risk in Horsham, VIC: 2026 Assessment

Horsham in Victoria faces elevated extreme heat risk. The Bureau of Meteorology (BOM) reports that Australia's average temperature has increased by approximately 1.5 °C since 1910, with the frequency of extreme heat days rising across most regions.

The urban heat island (UHI) effect can make built-up areas of Horsham warmer than surrounding rural areas, particularly on summer nights. Dark roof materials, limited tree canopy cover, and heat-absorbing surfaces contribute to localised heat stress that varies by property.

Horsham experiences hot summers with average maximum temperatures exceeding 30 degrees Celsius in January. Heatwaves can pose a significant risk to vulnerable populations.

Get an address-level heat risk assessment from ClimateNest for Horsham including cooling cost estimates, heatwave vulnerability scoring, and adaptation recommendations tailored to your property.

Horsham (postcode 3400) is tracked in ClimateNest's suburb hazard model, which maps the share of the suburb's land exposed to each hazard at high and moderate levels. The suburb's highest high-risk exposures are bushfire (24.3% of land in high-risk zones), riverine flood (7.5% of land in high-risk zones), surface flood (7.4% of land in high-risk zones). Exposure is not uniform across Horsham — individual properties can sit well above or below these averages, so an address-level check is recommended before buying, selling or insuring.