Climate Insights for Carnarvon

The climate in Carnarvon is warm and mild. The average annual temperature is 18°C and approximately 246mm of precipitation falls per year. May is the wettest month, receiving around 75mm of rainfall. Carnarvon is in the Southern Hemisphere. The seasons are reversed — summer runs from December to February, while winter falls between June and August. The summer months are: December, February, January. The coldest months are July, June, August, when temperatures can drop to 3°C.

Temperatures in Carnarvon vary considerably across the year, with a 31°C difference between the coldest and warmest months. The warmest month is December, when average highs reach 34°C and the mean temperature sits around 26°C. July is the coolest month, with minimum temperatures around 3°C and an average of 9°C. On average, daily temperatures fluctuate by about 15°C between overnight lows and afternoon highs. The sharpest temperature change occurs between April and May, with a 5°C shift in average temperatures.

Carnarvon is a quite dry location, receiving approximately 246mm of precipitation annually, which averages out to around 21mm per month. The wettest month is May, averaging 75mm of rainfall. January and March also tend to see above-average precipitation. The driest month is September, with just 1mm. That's 74mm less than May, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic.

Carnarvon is relatively calm, with an average annual wind speed of 5km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is December, averaging 6km/h, though still comfortable for most outdoor activities. The calmest conditions occur in May, with average winds dropping to 4km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 2km/h between the calmest and windiest months.

It is currently winter in Carnarvon, which began on June 21, 2026. Carnarvon is in the Southern Hemisphere, where the seasons are reversed — spring starts in September, summer in December, autumn in March, and winter in June. The warmest period peaks in December at around 34°C, while the coldest stretch bottoms out in July near 3°C. Spring is next, beginning on September 23, 2026 — 52 days from now.

The best time to visit Carnarvon is during February, March, April, October and November, when the weather is most comfortable for travellers. During these months, average temperatures hover around 21°C with modest rainfall averaging 13mm per month. By contrast, December can be uncomfortably hot with highs reaching 34°C, while July is the coldest period with lows dropping to 3°C. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.

The table below shows monthly climate averages for Carnarvon based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.