What's local to Upper Hutt
More frost than the city
NIWA's table gives 24 days a year below 0°C at Wallaceville, at the Upper Hutt end of the valley. Wellington Aero gets none.
Still, wet air
Wallaceville has the lowest mean wind speed of NIWA's selected Wellington stations, thanks to its sheltered spot, and the most rain days. Its average 9 am humidity is 84.2%, against 77.6% at Wellington Aero.
Forest to the north
Kaitoke Regional Park covers 2860 hectares of the Tararua foothills, its Waterworks Road entrance 12 km north of the city. Greater Wellington listed possum control there and in Pākuratahi from August 2025 to June 2026, with traps and bait stations, and asked for dogs on a leash.
Traps in most suburbs
Pest Free Upper Hutt started in 2018, backed by Forest & Bird, Greater Wellington, the city council and DOC, to trap rats, mustelids and possums. Predator Free Hutt Valley listed 25 Upper Hutt groups when we checked.
Why winter sends pests indoors here
Cold nights and a subfloor that rarely dries out make a warm ceiling space attractive. Tenancy Services says winter is the more common time for rats and mice to get into a house, and the Upper Hutt climate gives them every reason.
Damp under the floor matters for borer too. Consumer NZ said in 2015 that borer prefer moist timber and that a well-aired subfloor helps, so the same fixes do double duty.
Wasps near the bush
Greater Wellington's plan says German and common wasps are common in native bush, so a house on the edge of the hills can expect more of them in late summer. On private land the nest is the occupier's job, and a written direction from Greater Wellington gives 10 working days to have it dealt with. Keep well back and let a pest business find and treat it.
Before winter, and what to leave
You can
- Clear the subfloor vents and fix anything dripping under the house.
- Keep pet food and compost locked away at night.
- Cut back branches touching the roof, because rats climb well.
- Listen for scratching at night and note where it is.
Leave to a pest business
- Finding how rats or mice are getting into the roof.
- Bait stations (locked boxes that hold rodent bait), placed out of reach of kids and pets.
- Any wasp nest, wherever it is.
If it were our house in Upper Hutt
We'd get in early. Book a look at the roof space and subfloor in autumn, before the frosts arrive, rather than waiting for the scratching. Tap Rats or mice, say when you first heard them, and mention if the house backs onto bush.
Want someone to look at it?
Tell us what you've seen and your postcode, and a local pest business that handles exactly that calls you to talk it through.
