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April Weather in Grantham, United Kingdom

Last updated: August 27, 2025

In April, the average temperature in Grantham, United Kingdom is a cool 9°C (48°F). Expect minimums to dip as low as -2°C (29°F) and maximums soaring to 26°C (79°F). During this time, there’s an average precipitation of 35 mm (1.4 in) spread across 8 days, contributing to a notable average humidity of 84%. Prepare for a mix of chilly air and occasional showers!

April Temperature in Grantham

In April in Grantham, the average temperature is 9°C (48°F). Maximums can reach 26°C (79°F), while minimums can drop as low as -2°C (29°F). Be prepared for a wide range of temperatures and pack accordingly for 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 9°C (48°F), with highs reaching up to 26°C (79°F) and lows dropping to around -2°C (29°F).
JanFebMarAprMayJunJulAugSepOctNovDec404245485460646358524642
Data source: Temperature data for Grantham generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

April Precipitation in Grantham

In Grantham in April, the precipitation amount is 35 mm (1.4 in) over the course of 8 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 35 mm (1.4 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec465761366478727557765874
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in Grantham

In Grantham in April, humidity is 84%. With an average temperature of 9°C (48°F), this humidity feels like a damp chill that envelops you, making it essential to dress in layers and stay active, as the moisture in the air can quickly lead to discomfort while traveling.

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 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec90%88%86%84%80%81%76%77%85%90%92%90%
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 reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check 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 5, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec123578875421
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.
 TemperaturePrecipitationHumidityUV
January Weather5°C (41°F)46 mm (1.8 inches)90%low
February Weather6°C (43°F)57 mm (2.3 inches)88%low
March Weather7°C (45°F)61 mm (2.4 inches)86%moderate
April Weather9°C (48°F)35 mm (1.4 inches)84%moderate
May Weather12°C (54°F)64 mm (2.5 inches)80%high
June Weather16°C (60°F)78 mm (3.1 inches)81%very high
July Weather18°C (64°F)72 mm (2.8 inches)76%very high
August Weather17°C (63°F)75 mm (3.0 inches)77%high
September Weather15°C (59°F)57 mm (2.3 inches)85%moderate
October Weather11°C (53°F)76 mm (3.0 inches)90%moderate
November Weather8°C (46°F)58 mm (2.3 inches)92%low
December Weather6°C (42°F)74 mm (2.9 inches)90%low

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