Simpson, Australia experiences average highs of 17°C (63°F) and lows of 10°C (50°F) throughout the year. Rainfall is moderate, averaging about 11 rainy days per month. Sunshine is abundant, averaging about 9 hours per day. Average highs have warmed by 0.6°C (1.1°F) across the available records.
Simpson, Australia Weather & Climate 2026
Monthly climate averages for Simpson, Australia. Based on 10-year ERA5 reanalysis data.
Climate Overview
Drier season: Jan–Dec 
Wetter season: Jul–Oct At-a-Glance Climate Summary
Live Weather & Air Quality
Key figures
Climate Score
6.7/10
Best: January, February, March, December
UV Index
5
Low
Temperature 17°C / 10°C
Feels Like 16°C / 8°C
Rainy Days 11
Rainfall 71 mm
Sunshine 9 h
Humidity 77%
Wind Speed 18 km/h
Dew Point 10°C
Hottest Month
24°C
January
Avg Low 14°C
Rain 6 days
Coldest Month
7°C
July
Avg High 12°C
Rain 15 days
Driest Month
5 days
February
Avg High 23°C
Avg Low 14°C
Windiest Month
20 km/h
September (Gusts 50)
Sea Temperature
14°C – 18°C
Warmest water: February (
18.4°C
)
Worst Time to Visit
Consider avoiding June, July, August, September due to frequent rain.
Sun Position
Sunrise 07:41
Daylight 9.7h
Sunset 17:25
Live conditions —
Simpson on the map · live conditions
Simpson, Australia
- Continent
- Oceania
- Country
- Australia
- City
- Simpson
- Population
- 545
- Coordinates
- -38.50°, 143.25°
Seasonal Breakdown
Spring
Sep–Nov
Avg High 16°C
Avg Low 9°C
Rain 13 days/mo
Summer
Dec–Feb
Avg High 23°C
Avg Low 13°C
Rain 6 days/mo
3/3 best months
Autumn
Mar–May
Avg High 18°C
Avg Low 11°C
Rain 9 days/mo
1/3 best months
Winter
Jun–Aug
Avg High 12°C
Avg Low 7°C
Rain 14 days/mo
Climate Charts
Based on historical averages (2016–2025)
Monthly Temperatures
High Low Shaded bands show the typical range across the available yearly records.
Line chart showing monthly temperatures. Jan: 24°C / 14°C . Feb: 23°C / 14°C . Mar: 22°C / 13°C . Apr: 18°C / 11°C . May: 15°C / 9°C . Jun: 12°C / 7°C . Jul: 12°C / 7°C . Aug: 13°C / 7°C . Sep: 14°C / 8°C . Oct: 16°C / 9°C . Nov: 19°C / 11°C . Dec: 21°C / 12°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 58 mm. Feb: 33 mm. Mar: 44 mm. Apr: 62 mm. May: 80 mm. Jun: 64 mm. Jul: 85 mm. Aug: 84 mm. Sep: 95 mm. Oct: 104 mm. Nov: 88 mm. Dec: 51 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 70%. Feb: 71%. Mar: 73%. Apr: 77%. May: 81%. Jun: 85%. Jul: 85%. Aug: 82%. Sep: 79%. Oct: 77%. Nov: 75%. Dec: 71%.
Monthly Wind Speed
Wind Speed Gusts
Bar chart showing monthly wind speed. Jan: 17 km/h . Feb: 17 km/h . Mar: 17 km/h . Apr: 16 km/h . May: 17 km/h . Jun: 17 km/h . Jul: 19 km/h . Aug: 19 km/h . Sep: 20 km/h . Oct: 20 km/h . Nov: 18 km/h . Dec: 18 km/h .
Sunshine
Sunshine
Sunshine: Jan: 12h. Feb: 11h. Mar: 9h. Apr: 8h. May: 7h. Jun: 7h. Jul: 7h. Aug: 8h. Sep: 9h. Oct: 10h. Nov: 11h. Dec: 11h.
Sea Temperature
Sea Temperature swim
Line chart showing monthly sea temperature. Jan: 18°C . Feb: 18°C . Mar: 18°C . Apr: 17°C . May: 16°C . Jun: 14°C . Jul: 14°C . Aug: 14°C . Sep: 14°C . Oct: 15°C . Nov: 16°C . Dec: 17°C .
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 8. Feb: UV 8. Mar: UV 6. Apr: UV 4. May: UV 3. Jun: UV 2. Jul: UV 2. Aug: UV 4. Sep: UV 5. Oct: UV 6. Nov: UV 7. Dec: UV 8.
Monthly Daylight Hours
Daylight 12h reference
Monthly Dew Point & Comfort
Dew Point Dry Comfortable Humid Muggy Oppressive
Climate Trends
Average highs have warmed by 0.6°C (1.1°F) across the available records. Average rainfall is trending drier by about 18 mm.
2016 to 2025
Avg high Avg rainfall
Climate summary
| Last 12 months | All years | |
|---|---|---|
| Hottest month | Jan 2025 · 25°C | Jan · 24°C |
| Coldest month | Jul 2025 · 6°C | Jul · 7°C |
| Wettest month | Nov 2025 · 151 mm | Oct · 104 mm |
| Windiest month | Oct 2025 · 22 km/h | Sep · 20 km/h |
Month-by-Month Weather Table
January best
Excellent 
February best
Excellent March best
Excellent April
Good May
Fair June
Fair July
Fair August
Fair September
Fair October
Good November
Good December best
Excellent | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January best | 24°C / 14°C | 24°C / 13°C | 6days (58 mm) Good | 11.5h Excellent | 70% Muggy | 8.3 Very High | Excellent | View Details |
| February best | 23°C / 14°C | 22°C / 13°C | 5days (33 mm) Good | 10.8h Excellent | 71% Muggy | 7.7 Very High | Excellent | View Details |
| March best | 22°C / 13°C | 21°C / 12°C | 6days (44 mm) Good | 9.4h Good | 73% Muggy | 6.4 High | Excellent | View Details |
| April | 18°C / 11°C | 16°C / 10°C | 9days (62 mm) Wet | 8h Good | 77% Humid | 4.2 Moderate | Good | View Details |
| May | 15°C / 9°C | 12°C / 7°C | 12days (80 mm) Wet | 7.2h Good | 81% Humid | 2.9 Moderate | Fair | View Details |
| June | 12°C / 7°C | 10°C / 4°C | 12days (64 mm) Wet | 6.8h Fair | 85% Humid | 2.3 Moderate | Fair | View Details |
| July | 12°C / 7°C | 9°C / 4°C | 15days (85 mm) Wet | 7h Good | 85% Humid | 2.4 Moderate | Fair | View Details |
| August | 13°C / 7°C | 10°C / 4°C | 15days (84 mm) Wet | 7.8h Good | 82% Humid | 3.5 Moderate | Fair | View Details |
| September | 14°C / 8°C | 12°C / 5°C | 14days (95 mm) Wet | 9.3h Good | 79% Humid | 4.9 Moderate | Fair | View Details |
| October | 16°C / 9°C | 15°C / 7°C | 14days (104 mm) Wet | 9.8h Good | 77% Humid | 6.4 High | Good | View Details |
| November | 19°C / 11°C | 18°C / 9°C | 12days (88 mm) Wet | 10.8h Excellent | 75% Muggy | 7.3 Very High | Good | View Details |
| December best | 21°C / 12°C | 21°C / 11°C | 8days (51 mm) Wet | 11.4h Excellent | 71% Muggy | 7.9 Very High | Excellent | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Simpson are January, February, March, December, when temperatures are comfortable and rainfall is at its lowest. This is based on 10-year climate averages for Simpson, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Simpson is January, with average daytime highs of 24°C (75°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Simpson is July, with average overnight lows of 7°C (44°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Simpson is October, averaging 104mm of precipitation across 14 rainy days. An umbrella or waterproof jacket is essential.
The rainy season in Simpson runs through July, August, September, October, with the heaviest rainfall in July. Based on 10-year averages for Simpson.
Simpson receives approximately 110 sunshine hours per year. The sunniest month is January with around 12 hours. Based on climate data for Simpson.
The least favorable months to visit Simpson are June, July, August, September, primarily due to frequent rain. For the best conditions, consider January, February, March, December instead.
The annual average UV index in Simpson is 5, classified as moderate. Standard sun protection (sunscreen, hat) is recommended during prolonged outdoor exposure.
Average humidity in Simpson is 77%, classified as humid. Humidity levels are generally comfortable and should not affect outdoor activities for most people.
Sea temperatures in Summer average 16°C (61°F), which most swimmers will find too cold without a wetsuit.
Average wind speeds in Simpson are 18 km/h (11 mph). The windiest month is September with peak winds reaching 20 km/h (12 mph) (gusts up to 50 km/h / 31 mph).
Simpson averages 2 clear-sky days per month with overall cloud cover around 66%. The clearest skies occur in January.
The annual average dew point in Simpson is 10°C (50°F), which feels pleasant with low humidity. Outdoor activities are comfortable year-round from a humidity standpoint.
Simpson has a Oceanic climate, classified as Cfb 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 Simpson ranges from 8°C (46°F) to 16°C (61°F) on average. The 'feels like' temperature closely matches the actual temperature throughout most of the year.
July is not the best time to visit Simpson, with a climate score of 4.7/10. Consider visiting during January, February, March, December instead for better conditions.
For July in Simpson, pack Layered clothing, Light jacket, Umbrella, Waterproof jacket, Waterproof shoes. With average highs of 12°C (53°F) and 15 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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