St Clair, Australia experiences average highs of 23°C (73°F) and lows of 12°C (54°F) throughout the year. Rainfall is moderate, averaging about 9 rainy days per month. Sunshine is abundant, averaging about 9 hours per day. Average highs have stayed broadly stable across the available records.
St Clair, Australia Weather & Climate 2026
Monthly climate averages for St Clair, Australia. Based on 10-year ERA5 reanalysis data.
Climate Overview
Drier season: Apr–Sep 
Wetter season: Jan–Dec At-a-Glance Climate Summary
Live Weather & Air Quality
Key figures
Climate Score
7.8/10
Best: January, February, April, November, December
UV Index
6
High
Temperature 23°C / 12°C
Feels Like 23°C / 11°C
Rainy Days 9
Rainfall 69 mm
Sunshine 9 h
Humidity 71%
Wind Speed 14 km/h
Dew Point 12°C
Frost Days 1 days
Hottest Month
29°C
January
Avg Low19°C
Rain12days
Coldest Month
5°C
July
Avg High17°C
Rain5days
Driest Month
5days
July
Avg High17°C
Avg Low5°C
Windiest Month
17 km/h
November (Gusts 40)
Worst Time to Visit
Consider avoiding July due to less favorable weather conditions.
Sun Position
Sunrise 07:01
Daylight 9.9h
Sunset 16:56
Live conditions—
St Clair on the map · live conditions
St Clair, Australia
- Continent
- Oceania
- Country
- Australia
- City
- St Clair
- Population
- 19.9K
- Coordinates
- -33.80°, 150.78°
Seasonal Breakdown
Spring
Sep–Nov
Avg High 24°C
Avg Low 12°C
Rain 8 days/mo
1/3 best months
Summer
Dec–Feb
Avg High 28°C
Avg Low 18°C
Rain 11 days/mo
3/3 best months
Autumn
Mar–May
Avg High 23°C
Avg Low 13°C
Rain 10 days/mo
1/3 best months
Winter
Jun–Aug
Avg High 17°C
Avg Low 6°C
Rain 6 days/mo
Climate Charts
Based on historical averages (2016–2025)
Monthly Temperatures
HighLowShaded bands show the typical range across the available yearly records.
Line chart showing monthly temperatures. Jan: 29°C / 19°C . Feb: 28°C / 18°C . Mar: 26°C / 17°C . Apr: 23°C / 13°C . May: 19°C / 9°C . Jun: 16°C / 6°C . Jul: 17°C / 5°C . Aug: 18°C / 6°C . Sep: 22°C / 9°C . Oct: 24°C / 12°C . Nov: 26°C / 15°C . Dec: 28°C / 17°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 89 mm. Feb: 94 mm. Mar: 140 mm. Apr: 56 mm. May: 50 mm. Jun: 46 mm. Jul: 54 mm. Aug: 46 mm. Sep: 44 mm. Oct: 67 mm. Nov: 72 mm. Dec: 71 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 71%. Feb: 72%. Mar: 76%. Apr: 75%. May: 75%. Jun: 77%. Jul: 73%. Aug: 69%. Sep: 65%. Oct: 66%. Nov: 66%. Dec: 66%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 15 km/h . Feb: 15 km/h . Mar: 14 km/h . Apr: 12 km/h . May: 12 km/h . Jun: 13 km/h . Jul: 14 km/h . Aug: 14 km/h . Sep: 16 km/h . Oct: 16 km/h . Nov: 17 km/h . Dec: 17 km/h .
Sunshine
Sunshine
Sunshine: Jan: 10h. Feb: 10h. Mar: 9h. Apr: 9h. May: 8h. Jun: 8h. Jul: 8h. Aug: 9h. Sep: 10h. Oct: 10h. Nov: 11h. Dec: 11h.
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 8. Feb: UV 7. Mar: UV 6. Apr: UV 5. May: UV 4. Jun: UV 3. Jul: UV 3. Aug: UV 4. Sep: UV 6. Oct: UV 7. Nov: UV 8. Dec: UV 8.
Monthly Daylight Hours
Daylight12h reference
Monthly Dew Point & Comfort
Dew Point Dry Comfortable Humid Muggy Oppressive
Climate Trends
Average highs have stayed broadly stable across the available records. Average rainfall has remained broadly steady.
2016 to 2025
Avg high Avg rainfall
Climate summary
| Last 12 months | All years | |
|---|---|---|
| Hottest month | Dec 2025 · 29°C | Jan · 29°C |
| Coldest month | Jun 2025 · 5°C | Jul · 5°C |
| Wettest month | May 2025 · 127 mm | Mar · 140 mm |
| Windiest month | Nov 2025 · 19 km/h | Nov · 17 km/h |
Month-by-Month Weather Table
January best
Excellent 
February best
Excellent March
Good April best
Excellent May
Good June
Good July
Fair August
Good September
Good October
Good November best
Excellent December best
Excellent | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January best | 29°C / 19°C | 31°C / 21°C | 12days (89 mm) Wet | 9.8h Good | 71% Muggy | 7.5 Very High | Excellent | View Details |
| February best | 28°C / 18°C | 30°C / 20°C | 11days (94 mm) Wet | 10h Excellent | 72% Muggy | 7.4 Very High | Excellent | View Details |
| March | 26°C / 17°C | 27°C / 18°C | 15days (140 mm) Wet | 8.9h Good | 76% Humid | 6.3 High | Good | View Details |
| April best | 23°C / 13°C | 23°C / 12°C | 7days (56 mm) Good | 9h Good | 75% Muggy | 5.1 High | Excellent | View Details |
| May | 19°C / 9°C | 18°C / 7°C | 7days (50 mm) Good | 8.4h Good | 75% Muggy | 3.5 Moderate | Good | View Details |
| June | 16°C / 6°C | 14°C / 4°C | 6days (46 mm) Good | 7.8h Good | 77% Humid | 3.2 Moderate | Good | View Details |
| July | 17°C / 5°C | 14°C / 3°C | 5days (54 mm) Good | 8.2h Good | 73% Muggy | 3.4 Moderate | Fair | View Details |
| August | 18°C / 6°C | 16°C / 4°C | 6days (46 mm) Good | 8.9h Good | 69% Muggy | 4.3 Moderate | Good | View Details |
| September | 22°C / 9°C | 20°C / 7°C | 6days (44 mm) Good | 9.9h Good | 65% Muggy | 6 High | Good | View Details |
| October | 24°C / 12°C | 24°C / 11°C | 9days (67 mm) Wet | 10.1h Excellent | 66% Muggy | 7.1 Very High | Good | View Details |
| November best | 26°C / 15°C | 26°C / 15°C | 9days (72 mm) Wet | 10.7h Excellent | 66% Muggy | 7.7 Very High | Excellent | View Details |
| December best | 28°C / 17°C | 30°C / 18°C | 10days (71 mm) Wet | 10.9h Excellent | 66% Muggy | 8.4 Very High | Excellent | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit St Clair are January, February, April, November, December, when temperatures are comfortable and rainfall is at its lowest. This is based on 10-year climate averages for St Clair, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in St Clair is January, with average daytime highs of 29°C (84°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in St Clair is July, with average overnight lows of 5°C (42°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in St Clair is March, averaging 140mm of precipitation across 15 rainy days. An umbrella or waterproof jacket is essential.
The rainy season in St Clair runs through March, January, February, December, with the heaviest rainfall in March. Based on 10-year averages for St Clair.
St Clair receives approximately 113 sunshine hours per year. The sunniest month is December with around 11 hours. Based on climate data for St Clair.
The least favorable months to visit St Clair are July, primarily due to less favorable weather conditions. For the best conditions, consider January, February, April, November, December instead.
The annual average UV index in St Clair is 6, classified as high. Standard sun protection (sunscreen, hat) is recommended during prolonged outdoor exposure.
Average humidity in St Clair is 71%, classified as moderate. Humidity levels are generally comfortable and should not affect outdoor activities for most people.
St Clair rarely sees significant snowfall but does experience frost, averaging 1 frost days during the colder months.
Average wind speeds in St Clair are 14 km/h (9 mph). The windiest month is November with peak winds reaching 17 km/h (10 mph) (gusts up to 40 km/h / 25 mph).
St Clair averages 7 clear-sky days per month with overall cloud cover around 48%. The clearest skies occur in July.
The annual average dew point in St Clair is 12°C (54°F), which feels pleasant with low humidity. Outdoor activities are comfortable year-round from a humidity standpoint.
St Clair has a Humid Subtropical climate, classified as Cfa under the Köppen system. Temperate climates have mild winters and warm summers, with rainfall spread across the year and four distinct seasons.
The 'feels like' temperature in St Clair ranges from 11°C (52°F) to 23°C (73°F) on average. The 'feels like' temperature closely matches the actual temperature throughout most of the year.
Yes, June is a great time to visit St Clair. It earns a climate score of 6.7/10 with Good.
For June in St Clair, pack Layered clothing, Light jacket, Umbrella, Comfortable walking shoes. With average highs of 16°C (61°F) and 6 rainy days, these essentials will keep you comfortable.
Data Source
Climate data derived from ERA5 reanalysis (ECMWF), averaged over 2016–2025. Sea surface temperature from marine reanalysis data. Climate scores and seasonal estimates are computed by WorldStats.
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