May Weather in Grantham, Australia

Last updated: August 22, 2025

In Grantham, Australia, the average temperature in May hovers around 16°C (61°F), with comfortable highs of up to 29°C (85°F) and occasional lows dipping to 3°C (38°F). Expect about 19 mm (0.8 in) of precipitation spread over 4 days, contributing to an average humidity level of 74%. Whether you’re planning outdoor adventures or cozy indoor activities, this month offers a delightful mix of weather!

May Temperature in Grantham

In May in Grantham, the average temperature is 16°C (61°F), with maximums reaching 29°C (85°F) and minimums dropping as low as 3°C (38°F). This range of temperatures makes it ideal for travelers to pack layers and enjoy both warm days and cooler evenings.

May Weather in Grantham: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Grantham, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Grantham, May typically has an average temperature of 16°C (61°F), with highs reaching up to 29°C (85°F) and lows dropping to around 3°C (38°F).

Data source: Temperature data for Grantham generated using information from the Copernicus Climate Change Service.

May Precipitation in Grantham

In Grantham in May, the precipitation amount is 19 mm (0.8 in) over a span of 4 days.

May Precipitation Trends in Grantham

The chart displays monthly precipitation patterns in Grantham, with values for each month alongside May’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May’s conditions compare to those of other months. In Grantham, May typically receives around 19 mm (0.8 inches) of precipitation spread over approximately 4 days.

Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

May Humidity in Grantham

In Grantham in May humidity is 74%. With an average temperature of 16°C (61°F), this humidity feels like a damp blanket wrapping around you, making traveling quite uncomfortable as the air feels thick and muggy, potentially leading to fatigue and a longing for a cool breeze.

May Average Humidity in Grantham

This chart illustrates the average monthly humidity levels in Grantham, with May’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In May, average humidity in Grantham is approximately 74%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Grantham

In Grantham in May, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Grantham.

Maximum UV Index Levels in Grantham for May

The chart shows the monthly maximum UV Index (UVI) for Grantham in May, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In May, the maximum UV index in Grantham typically reaches 7, which falls under the high exposure category.

Data source: Grantham May UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How May Weather in Grantham Compares to Other Months

Weather in Grantham varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Grantham, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Grantham, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	24°C (76°F)	69 mm (2.7 inches)	70%	extreme
February Weather	24°C (75°F)	97 mm (3.8 inches)	69%	extreme
March Weather	22°C (73°F)	130 mm (5.1 inches)	75%	extreme
April Weather	19°C (67°F)	38 mm (1.5 inches)	78%	very high
May Weather	16°C (61°F)	19 mm (0.8 inches)	74%	high
June Weather	13°C (56°F)	30 mm (1.2 inches)	76%	moderate
July Weather	13°C (55°F)	27 mm (1.1 inches)	72%	moderate
August Weather	14°C (57°F)	11 mm (0.4 inches)	75%	very high
September Weather	17°C (63°F)	11 mm (0.4 inches)	69%	very high
October Weather	20°C (68°F)	122 mm (4.8 inches)	62%	extreme
November Weather	22°C (71°F)	61 mm (2.4 inches)	61%	extreme
December Weather	24°C (75°F)	96 mm (3.8 inches)	70%	extreme