April Weather in Grantham, United States

Last updated: June 24, 2025

In April, the average temperature in Grantham, United States hovers around 6°C (44°F). Expect a minimum of -6°C (21°F) and a potential maximum of 26°C (80°F), offering a wide range of experiences. Be prepared for 116 mm (4.6 in) of precipitation spread across 12 days, contributing to an average humidity of 80%.

April Temperature in Grantham

In April in Grantham, the average temperature is 6°C (44°F). The maximum can reach 26°C (80°F), and the minimum can be as low as -6°C (21°F). It's advisable to pack layers to prepare for a wide range of temperatures during your travels.

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

The chart illustrates April 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, April typically has an average temperature of 6°C (44°F), with highs reaching up to 26°C (80°F) and lows dropping to around -6°C (21°F).

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

April Precipitation in Grantham

In Grantham in April, the precipitation amount is 116 mm (4.6 in) over a span of 12 days.

April Precipitation Trends in Grantham

The chart displays monthly precipitation patterns in Grantham, with values for each month alongside April’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how April’s conditions compare to those of other months. In Grantham, April typically receives around 116 mm (4.6 inches) of precipitation spread over approximately 12 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

April Humidity in Grantham

In Grantham in April, humidity is 80%. With an average temperature of 6°C (44°F), this humidity feels like a damp chill that clings to your skin, making outdoor exploration uncomfortable and prompting a desire for cozy, indoor activities instead.

April Average Humidity in Grantham

This chart illustrates the average monthly humidity levels in Grantham, with April’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In April, average humidity in Grantham is approximately 80%, offering insight into how humid the weather typically is during this month.

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

April UV Index in Grantham

In Grantham in April, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Grantham.

Maximum UV Index Levels in Grantham for April

The chart shows the monthly maximum UV Index (UVI) for Grantham in April, 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 April, the maximum UV index in Grantham typically reaches 8, which falls under the very high exposure category.

Data source: Grantham April 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 April 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 April’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 April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-6°C (22°F)	70 mm (2.7 inches)	86%	moderate
February Weather	-4°C (25°F)	81 mm (3.2 inches)	84%	moderate
March Weather	0°C (32°F)	71 mm (2.8 inches)	82%	high
April Weather	6°C (44°F)	116 mm (4.6 inches)	80%	very high
May Weather	13°C (56°F)	78 mm (3.1 inches)	72%	very high
June Weather	19°C (66°F)	85 mm (3.4 inches)	72%	very high
July Weather	22°C (71°F)	120 mm (4.7 inches)	67%	very high
August Weather	21°C (69°F)	86 mm (3.4 inches)	66%	very high
September Weather	17°C (62°F)	64 mm (2.5 inches)	71%	high
October Weather	10°C (50°F)	132 mm (5.2 inches)	78%	moderate
November Weather	2°C (36°F)	100 mm (3.9 inches)	84%	moderate
December Weather	-3°C (27°F)	102 mm (4.0 inches)	81%	low