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Live forecasts update automatically; written guidance last reviewed 23 June 2026 by the Aussie Focus Hub Weather Desk. Data from the Bureau of Meteorology (BOM) and other national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
Grantham’s weather today is shaped by a passing inland trough, bringing a mix of cloud and a light shower chance into the afternoon. The live forecast above shows current conditions for this Lockyer Valley town, where temperatures sit in the mid-to-high twenties with a gentle easterly breeze.
What’s driving Grantham’s weather pattern?
A weak surface trough is drawing moisture inland from the coast, keeping skies partly cloudy through the day. The chance of a brief shower is highest after lunch, but rainfall totals will stay below 1 millimetre. Overnight, the trough weakens, allowing a mostly clear sky to return for the evening.
How does this affect local conditions?
Grantham’s position in the Lockyer Valley means it often sees slightly warmer daytime highs than nearby Ipswich, with the range today near 27–29°C. Humidity sits around 50–60 per cent, keeping it comfortable. Winds shift from a light morning easterly to a gentle afternoon north-easterly, then calm after sunset.
Is Grantham likely to see storms today?
No. The trough is too weak to generate thunderstorm activity. Skies stay mostly cloudy with only a light shower possible, and no severe weather is forecast across the Lockyer Valley region.
How does Grantham’s weather compare to Brisbane?
Grantham runs about 2–3°C warmer than Brisbane’s CBD in the afternoon due to its inland position. The city’s coastal sea breeze keeps it cooler, while Grantham gets a lighter, drier easterly flow today.
Will the trough affect tomorrow’s forecast?
The trough dissipates overnight, leaving a mostly sunny day for Tuesday. A high-pressure ridge moves in from the south, keeping temperatures steady near 27°C with no rain expected.
For broader forecasts across the state, check the Australia weather hub or see how Brisbane Weather compares with Grantham’s inland conditions today.