St Clair Weather – Forecast, Radar and 7-Day Outlook
St Clair, located in Sydney’s western suburbs (postcode 2759), experiences weather patterns typical of the Greater Sydney region, with distinct seasonal variations that influence daily planning. This comprehensive guide aggregates forecasts from the Bureau of Meteorology and Weatherzone to provide residents and visitors with current conditions and forward-looking predictions.
The suburb sits within the Penrith local government area, where summer temperatures frequently climb into the high thirties, while winter brings milder conditions with overnight lows that can drop to single digits. Understanding these patterns helps residents prepare for everything from extreme UV events to periods of heavy rainfall.
Forecasters issue regular updates throughout the day, with the Bureau of Meteorology providing detailed guidance at 11:32 AM AEDT and subsequent refreshes at 4:20 PM AEDT. Those monitoring conditions in real-time can access live radar imagery and satellite data through official channels.
What is the hourly weather forecast for St Clair?
- Morning hours typically bring clearer skies before cloud cover builds through the afternoon
- Westerly winds during daytime rotate to southerly directions by evening, often bringing cooler air
- Western Sydney suburbs including St Clair experience higher daytime temperatures than the coastal city
- Summer thunderstorm activity tends to develop over the ranges and move east across the region
- Fire danger ratings remain elevated during prolonged dry spells and heatwave events
- Rainfall totals vary significantly between months, with February typically receiving the highest precipitation
- UV exposure peaks between 11 AM and 3 PM, requiring protective measures even on cloudy days
| Date | Condition | High/Low | Rain Chance | Expected Rainfall |
|---|---|---|---|---|
| Friday (Tomorrow) | Sunny morning, shower chance afternoon/evening | 35° / 19°C | 20% | 0 mm |
| Saturday 7 Feb | Partly cloudy, slight shower evening | 35° / 21°C | 40% | 0–1 mm |
| Sunday 8 Feb | Cloudy, high shower chance, thunderstorm evening | – / – | 80% | 1–15 mm |
| Monday 9 Feb | Cloudy, heavy showers morning/afternoon | 27° / 19°C | 90% | 2–25 mm |
| Tuesday 10 Feb | Partly cloudy, slight shower | 30° / 18°C | 20% | 0 mm |
| Thursday 12 Feb | Cloudy, high showers, thunderstorm chance | 27° / 21°C | 70% | 0–15 mm |
What is the 10-day weather forecast for St Clair NSW?
Understanding Extended Forecast Limitations
The Bureau of Meteorology provides detailed forecasts extending approximately seven days ahead, with Tuesday’s data incorporating conditions through Thursday 12 February. Beyond this window, forecast confidence diminishes considerably, as atmospheric patterns become increasingly difficult to model with precision.
Those seeking longer-range predictions should note that 14-day and 30-day outlooks carry substantial uncertainty margins. Weatherzone and WillyWeather aggregate historical data and statistical averages to supplement official forecasts, though these tools cannot reliably predict specific rainfall events or temperature extremes beyond two weeks.
For events scheduled more than a week ahead, check the extended forecast again 48 hours before. Forecast accuracy improves significantly for near-term predictions, reducing the risk of weather-related disruptions.
Temperature Trends Across the Week
The upcoming period shows considerable temperature variation. Friday promises the hottest conditions with a maximum of 35°C following an overnight minimum of 19°C. This heat builds through the middle of the week before cooler air arrives with Monday’s rainfall, bringing temperatures down to a maximum of 27°C and overnight lows around 19°C.
Tuesday and Wednesday show a gradual warming trend, with Tuesday reaching 30°C under partly cloudy skies. The overnight minimum of 18°C on Tuesday represents the coolest point in the forecast period.
Precipitation Outlook
Rainfall prospects cluster around three main events. Sunday carries an 80% chance of showers with potential totals between 1 and 15 millimetres, while Monday represents the wettest day with a 90% probability and possible accumulation reaching 25 millimetres. Thursday brings a secondary wet period with 70% rain chance and totals up to 15 millimetres.
Friday and Tuesday offer the best conditions for outdoor activities, with minimal rainfall expected and temperatures suitable for various pursuits. Those with weather-sensitive plans should consider rescheduling to these windows.
Where can I find the St Clair weather radar and BOM forecast?
Official Bureau of Meteorology Resources
The Bureau of Meteorology St Clair forecast page serves as the primary authoritative source for the suburb’s weather information. This platform delivers real-time updates, detailed daily breakdowns, and official warnings issued for the Penrith area and broader New South Wales region.
The detailed forecast page includes hourly temperature predictions, rainfall probability tables, wind direction and speed charts, and UV index readings. Forecasts are refreshed twice daily, with additional updates when significant weather changes occur, such as the development of severe thunderstorms or fire weather alerts.
The Bureau of Meteorology is Australia’s official government weather service, providing the highest authority forecast data for St Clair and surrounding suburbs. Forecasts are issued from the NSW Regional Forecasting Centre and reflect official Australian Government meteorological standards.
Supplementary Weatherzone Coverage
Weatherzone offers complementary radar imagery and satellite views that complement official BoM data. The platform provides live Sydney radar images showing precipitation patterns approaching from the west and moving across the greater Sydney metropolitan area.
Weatherzone’s hourly observations include current temperature readings, humidity percentages, wind gust data, and rainfall measurements since 9 AM. Their interface combines multiple data sources into a single dashboard, useful for those tracking developing weather situations in real-time.
Understanding Radar Interpretation
Weather radar imagery uses colour gradients to indicate rainfall intensity. Lighter greens and yellows represent light to moderate showers, while orange and red colours indicate heavier precipitation and potentially severe thunderstorm activity. St Clair falls within the coverage area of the Sydney (Penrith) radar, which provides effective detection within approximately 200 kilometres of the station.
Satellite imagery complements radar data by showing cloud cover patterns across the broader region. This combination helps residents anticipate approaching weather systems several hours before arrival, valuable for planning outdoor activities or monitoring fire weather conditions.
How accurate are St Clair weather forecasts?
- BOM issues forecasts twice daily for St Clair 2759
- 7-day outlook shows high confidence for first 4–5 days
- Temperature and UV forecasts reliable within 2–3°C
- Rain probability provides useful planning guidance
- Wind direction predictions accurate for general patterns
- Fire danger ratings updated with fuel moisture data
- 30-day forecasts carry high uncertainty margins
- Specific timing of afternoon thunderstorms difficult to pinpoint
- Exact rainfall amounts variable beyond 3-day window
- Overnight minimum temperatures may shift 2–4°C
- Snow or hail events in summer unlikely but not impossible
- Long-range temperature trends subject to model disagreement
What historical weather patterns affect St Clair?
St Clair experiences a temperate climate with warm to hot summers and mild winters, characteristic of Sydney’s western suburbs. This positioning away from the coast results in higher daytime temperatures and lower humidity compared to beachside suburbs, but also means greater exposure to cold fronts moving inland from the Southern Ocean.
Summer dominance presents residents with extended periods of heat, particularly in January and February when maximum temperatures regularly exceed 30°C. The suburb’s urban environment creates a heat island effect, trapping warmth overnight and elevating perceived temperatures during heatwave events.
Rainfall concentrates in the first quarter of the year, with February typically receiving the highest monthly totals. This pattern aligns with thunderstorm season, when moisture-laden air masses from the north and east interact with cold fronts approaching from the south and west. The resulting instability produces the heavy rainfall and severe weather that contributes significantly to annual precipitation.
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Where does the weather data come from?
“Sunny morning. Medium chance of showers in the afternoon and evening. Min 19°C, max 35°C. Possible rainfall 0 mm, 20% chance of rain. Winds west to northwesterly 15-20 km/h turning south to southwesterly 20-30 km/h.”
Bureau of Meteorology, St Clair 2759 Forecast
“Partly cloudy, slight shower in west (afternoon/evening), thunderstorm chance. 40% rain chance, less than 1 mm. Moderate fire danger, extreme UV.”
Weatherzone, St Clair Near-Term Forecast
Primary data sources include the Bureau of Meteorology’s official forecasts for St Clair 2759 and Weatherzone’s real-time observations and radar imagery. AccuWeather provides supplementary hourly temperature data, while WillyWeather contributes historical climate statistics. All forecasts reference Australian Eastern Standard Time or Australian Eastern Daylight Time as applicable.
How to prepare for St Clair weather conditions
Residents should establish routine checks of official forecast sources, particularly during the summer months when conditions change rapidly. The Bureau of Meteorology website and app provide the most current information, with updates distributed through their social media channels during significant weather events.
The combination of extreme UV ratings and high temperatures demands consistent sun protection from September through March. Seeking shade during peak afternoon hours, wearing lightweight protective clothing, and applying SPF50+ sunscreen at regular intervals significantly reduces the risk of sun damage.
Those with weather-sensitive activities should maintain flexibility in scheduling, particularly for the coming week when shower activity concentrates on Sunday, Monday, and Thursday. Having indoor alternatives available ensures plans proceed regardless of rainfall timing.
Frequently Asked Questions
What is Lake St Clair weather and how does it differ from St Clair NSW?
Lake St Clair is located in Tasmania, approximately 1,500 kilometres south of Sydney’s St Clair suburb. The two locations experience vastly different climates, with Tasmania’s Lake St Clair experiencing much cooler temperatures year-round due to its higher latitude and elevation in the Central Highlands.
How accurate is the 30-day weather forecast for St Clair?
Forecasts extending beyond 10 days carry substantial uncertainty. While long-range predictions can indicate general temperature trends and whether a period leans wetter or drier than average, specific daily conditions, rainfall amounts, and storm events cannot be reliably predicted more than two weeks ahead.
Where is the Sydney weather radar located?
The main Sydney radar is positioned at Terrey Hills, providing coverage across the Sydney basin, the Blue Mountains, and the Central Coast. A secondary radar at Wildes Meadow serves the Wollongong area. St Clair falls within effective range of the Terrey Hills installation.
What does the UV Index of 11 mean for daily activities?
A UV Index of 11 represents extreme exposure levels requiring vigilant protection. The sun protection period for St Clair runs from 9:10 AM to 5:10 PM during the forecast period. Exposure during these hours without sunscreen, protective clothing, and shade can cause rapid skin damage.
Why does St Clair often experience higher temperatures than Sydney CBD?
Western Sydney suburbs including St Clair typically register temperatures 3–5°C higher than the city centre due to the urban heat island effect, greater distance from coastal sea breezes, and reduced vegetation cover. This temperature differential intensifies during heatwaves and low-wind conditions.
How do I access NSW weather warnings?
Current NSW weather warnings are available through the Bureau of Meteorology warnings page. These include severe thunderstorm warnings, fire weather alerts, flood watches, and heatwave notifications. Subscribing to the BOM app provides push notifications for warnings affecting your area.
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