If you’ve ever peered out the window in Baulkham Hills and wondered whether you need sunscreen or an umbrella, the answer changes quickly here. The suburb’s position on a ridge in Sydney’s Hills District creates its own little pocket of weather, often different from the city just 30 kilometres away.

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Current Temperature: 21°C (Feels like 20°C) · Chance of Rain: 90% · UV Index: 1.2 Low · Sun Protection: 10:40 am – 1:10 pm · Today’s High: 21°C · Tonight Low: 17°C (Bureau of Meteorology)

Quick snapshot

1Confirmed facts
2What’s unclear
  • Exact 14-day forecast accuracy varies (AccuWeather)
  • Long-range precipitation totals are uncertain (Yr.no)
3Timeline signal
  • Saturday 17 Jan max 21°C, 90% rain chance (Bureau of Meteorology)
  • Sunday 18 Jan max 22°C, 90% rain chance (Bureau of Meteorology)
4What’s next
  • Rain easing mid-week, sun returning Friday (Bureau of Meteorology)
  • Check daily for updated warnings (Bureau of Meteorology)

Six key stats paint a fuller picture of Baulkham Hills weather, from elevation to seasonal extremes.

Label Value Source
Location Baulkham Hills, NSW, Australia Wikipedia
Population Approx. 41,000 Wikipedia
Elevation 100 m (330 ft) Wikipedia
Climate type Humid subtropical (Cfa) Wikipedia
Coldest month July BOM climate data
Warmest month January BOM climate data

The table shows how elevation and latitude shape Baulkham Hills’ climate, distinct from coastal Sydney.

What’s the coldest month in Baulkham Hills?

July is the coldest month in Baulkham Hills, with average minimum temperatures dropping to around 5°C according to Bureau of Meteorology records (BOM climate data). The suburb’s elevation of 100 metres means it can be a few degrees cooler than central Sydney on winter mornings.

Average monthly temperatures in Baulkham Hills

  • January (warmest): average max 27°C, min 18°C (BOM climate data)
  • July (coldest): average max 16°C, min 5°C (BOM climate data)

Why July is the coldest month

Baulkham Hills experiences mild winters typical of coastal NSW. The coldest month aligns with the Southern Hemisphere winter solstice, and the ridge topography can trap cold air on clear nights, leading to occasional frost in low-lying pockets.

The upshot

If you’re moving to Baulkham Hills, prepare for winter mornings that can feel sharper than Sydney’s, but the days are still pleasant for outdoor activities.

The pattern is clear: summer heat peaks in January, winter chill in July, with spring and autumn offering the most comfortable transitions.

Is there a weather warning for Baulkham Hills?

As of January 17, 2026, no severe weather warnings are current for Baulkham Hills. The Bureau of Meteorology issues warnings for heavy rain, thunderstorms, and heatwaves that may affect the area (Bureau of Meteorology). The Fire Danger Rating is Low, meaning no restrictions on outdoor activity (NSW Rural Fire Service).

Current BOM weather warnings for the region

Check the BOM website for real-time updates. The Sydney area forecast includes Baulkham Hills, so any warnings for the greater Sydney basin apply.

How to check for severe weather alerts

  • Visit the BOM Baulkham Hills page for warnings
  • Subscribe to NSW SES alerts via their website
  • Use the Hazards Near Me app for fire and flood warnings
Why this matters

Baulkham Hills sits on a ridge, which can amplify storm impacts. A warning that seems minor for the city might mean stronger gusts and heavier rain on the hill.

What this means: staying informed is straightforward, but don’t assume city-level warnings capture the microclimate. Check the local BOM forecast.

How often does it rain in Baulkham Hills?

Baulkham Hills receives an average of 950 mm of rain per year, according to BOM records (BOM climate data). Rainfall is fairly evenly distributed, with a slight peak in autumn (March to May).

Average annual rainfall

  • Annual average: 950 mm (BOM climate data)
  • Rainy days per year: about 130 (BOM climate data)

Wettest months and rainfall patterns

  • Wettest month: March (average 130 mm) (BOM climate data)
  • Driest month: September (average 55 mm) (BOM climate data)
The trade-off

While the rain supports lush gardens and the local water supply, it also means regular wet weekends. Spring and autumn offer the best balance for outdoor plans.

The pattern: expect rain year-round, but plan outdoor events around the drier late winter and early spring months.

What is the 14-day weather forecast for Baulkham Hills?

Extended forecasts are less reliable than short-term predictions. The Bureau of Meteorology provides a 7-day forecast; 14-day outlooks come from services like AccuWeather (AccuWeather) and Yr.no (Yr.no).

14-day outlook overview

  • Week 1 (Jan 17-23): Showery start, clearing toward Friday with max 28°C (Bureau of Meteorology)
  • Week 2 (Jan 24-30): Possible heat spike, but confidence low (AccuWeather)

Reliability and limitations of extended forecasts

Forecast accuracy drops sharply after day 7. Use 14-day outlooks for trend awareness, not precise planning. The BOM’s 7-day forecast is the most reliable government source.

The implication: treat the second week as a rough guide. For critical decisions, stick to the 7-day BOM forecast and update daily.

What is the hourly weather forecast for Baulkham Hills?

Hourly forecasts provide temperature, RealFeel, wind speed, and precipitation chance. Both BOM and AccuWeather offer detailed hour-by-hour data (AccuWeather hourly; BOM hourly).

Hourly breakdown today

  • Morning (6 am – 12 pm): Cloudy, 20-21°C, 90% rain chance, east wind 15-20 km/h (Bureau of Meteorology)
  • Afternoon (12 pm – 6 pm): Rain likely, 21°C, wind turning westerly (Bureau of Meteorology)
  • Evening (6 pm – midnight): Showers easing, 18°C (Bureau of Meteorology)

Key hourly metrics: temperature, wind, humidity

  • Humidity: 70-90% during rain (Bureau of Meteorology)
  • Wind gusts: up to 33 km/h (Bureau of Meteorology)
  • UV Index: 1.2 low, no protection needed midday (ARPANSA)
The catch

Hourly forecasts from different providers can disagree on rain timing by 1-2 hours. For Baulkham Hills, the ridge effect means showers can arrive earlier than predicted for Sydney.

What this means: use BOM as your primary hourly source, but cross-check with AccuWeather or Weatherzone if the timing matters for an outdoor event.

Additional sources

accuweather.com, theweathernetwork.com, bom.gov.au, theweatherchaser.com

For those in the north-west corridor, the Rouse Hill weather forecast provides a useful comparison for planning outdoor activities.

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Frequently asked questions

Does Baulkham Hills ever get snow?

Snow is extremely rare. The elevation (100 m) is too low for regular snowfall. Frost occurs on winter mornings, but not snow. (Wikipedia)

What is the UV index typically in summer?

Summer UV Index in Baulkham Hills reaches 11+ extreme. Sun protection is essential from 10 am to 4 pm, even on cloudy days. (ARPANSA)

Is Baulkham Hills prone to flooding?

Some low-lying areas near creeks can flood after heavy rain, but the suburb is generally well-drained. Check SES flood maps for specific streets. (NSW SES)

What is the best time to visit Baulkham Hills for good weather?

Spring (September-November) and autumn (March-May) offer mild temperatures, lower humidity, and fewer rainy days. (BOM climate data)

How does the weather in Baulkham Hills compare to Sydney?

Baulkham Hills is typically 2-3°C cooler than Sydney CBD in summer and a few degrees colder on winter nights due to elevation and less urban heat island effect. (BOM climate data)

What is the average wind speed in Baulkham Hills?

Average wind speed is about 10-15 km/h, with stronger gusts during storms. January afternoons often have westerly winds. (Weatherzone)

Are there any microclimates within Baulkham Hills?

Yes. Homes on the ridge are windier and cooler, while those in valleys near creeks can be more humid and prone to fog. (BOM climate data)

For a suburban shopper planning their weekend run to Blacktown Building Supplies or a family filling up at Costco Fuel Marsden Park, the weather in Baulkham Hills demands attention. The choice is clear: check the BOM hourly forecast before heading out, especially in summer when storms can roll in from the west faster than predicted.