Warm Sunday Sun with a Late Storm Twist

Sunday Forecast Overview

Melbourne is set for a dynamic weather transition this Sunday, 22nd March 2026. While the day will begin with the standard autumn crispness residents have come to expect, the afternoon is predicted to bring a shift in conditions as cloud cover increases and the potential for atmospheric instability rises. Temperatures are expected to reach a comfortable maximum of 26°C to 28°C, making it a relatively warm day for late March, though a late-night change is on the horizon.

Morning: A Crisp and Clear Start

Early risers can expect a cool start to the day with temperatures sitting at a minimum of 14°C. Humidity levels will be high in the early hours, reaching up to 97%, which may result in some localized morning mist or dew across the suburbs. The morning sky will feature partly cloudy conditions with plenty of bright intervals, providing an ideal window for outdoor exercise, visits to local markets, or a stroll through the Royal Botanic Gardens. Winds are expected to remain light during the first half of the day, ensuring a calm atmosphere for those out and about early.

Afternoon: Building Clouds and Peak Warmth

As the day progresses into the afternoon, the temperature will climb steadily toward the daily high of 26°C. During this period, the humidity is expected to drop to approximately 65%, though it will still feel slightly more humid than the typical dry Melbourne autumn day. By mid-afternoon, residents will notice a significant increase in cloud cover. While long periods of sunshine are still likely between 12:00 PM and 3:00 PM, the skies will become increasingly overcast as we approach the evening hours. This thickening cloud layer is the first sign of a weather system moving across the state.

Evening and Night: Isolated Thunderstorm Risk

The primary concern for Sunday’s forecast occurs late in the day. Meteorologists have identified a risk of isolated thunderstorms developing across the Greater Melbourne area during the late evening and overnight period. While the general chance of rain during the daylight hours remains low at around 10%, the atmospheric conditions suggest that any storm that does develop could bring brief, heavy bursts of rain. Nighttime conditions will remain mild, with periodic clouds and temperatures slowly settling back toward the mid-teens. Residents are advised to secure loose outdoor items and keep an eye on radar updates if they have late-night travel plans.

Sunday Weather Summary

• Minimum Temperature: 14°C
• Maximum Temperature: 26°C to 28°C
• Morning Conditions: Partly cloudy and cool with high humidity.
• Afternoon Conditions: Increasing clouds and warm temperatures.
• Late Evening Notice: Risk of isolated thunderstorms and late-night rain showers.
• Rain Probability: 10% during the day, rising late at night.