Climate Insights for Hay

The climate in Hay is temperate. The average annual temperature is 18°C and approximately 312mm of precipitation falls per year. September is the wettest month, receiving around 40mm of rainfall. Hay 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: January, February, December. The coldest months are June, August, July, when temperatures can drop to 5°C.

Temperatures in Hay vary considerably across the year, with a 30°C difference between the coldest and warmest months. The warmest month is January, when average highs reach 35°C and the mean temperature sits around 27°C. June is the coolest month, with minimum temperatures around 5°C and an average of 9°C. On average, daily temperatures fluctuate by about 13°C between overnight lows and afternoon highs. The sharpest temperature change occurs between April and May, with a 6°C shift in average temperatures.

Hay is a quite dry location, receiving approximately 312mm of precipitation annually, which averages out to around 26mm per month. The wettest month is September, averaging 40mm of rainfall. October and April also tend to see above-average precipitation. The driest month is February, with just 10mm. That's 30mm less than September, the wettest month. Precipitation varies noticeably between seasons, with the second half (July to December) of the year generally seeing more rainfall.

Hay is relatively calm, with an average annual wind speed of 4km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is November, averaging 4km/h, though still comfortable for most outdoor activities. The calmest conditions occur in June, with average winds dropping to 3km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 1km/h between the calmest and windiest months.

It is currently winter in Hay, which began on June 21, 2026. Hay 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 January at around 35°C, while the coldest stretch bottoms out in June near 5°C. Spring is next, beginning on September 23, 2026 — 88 days from now.

The best time to visit Hay is during March, April, October, November and December, when the weather is most comfortable for travellers. During these months, average temperatures hover around 21°C with modest rainfall averaging 28mm per month. By contrast, January can be uncomfortably hot with highs reaching 35°C, while June is the coldest period with lows dropping to 5°C. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.

The table below shows monthly climate averages for Hay 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.