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April Weather in Horncastle, United Kingdom

Last updated: August 27, 2025

In April, the average temperature in Horncastle, United Kingdom hovers around 9°C (48°F). You can expect a range from a chilly -2°C (28°F) to a warm 25°C (78°F). Prepare for some drizzle, as precipitation totals around 33 mm (1.3 in) over 8 days, coupled with an average humidity of 85%.

April Temperature in Horncastle

In April in Horncastle, the average temperature is 9°C (48°F). Maximum temperatures can reach 25°C (78°F), while the minimum can drop as low as -2°C (28°F). Be prepared for a mix of mild and chilly weather while traveling, so pack accordingly!

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

The chart illustrates April temperature patterns in Horncastle, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Horncastle, April typically has an average temperature of 9°C (48°F), with highs reaching up to 25°C (78°F) and lows dropping to around -2°C (28°F).
JanFebMarAprMayJunJulAugSepOctNovDec404245485359636358534642
Data source: Temperature data for Horncastle 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 Horncastle

In Horncastle in April, the precipitation amount is 33 mm (1.3 in) during a span of 8 days.

April Precipitation Trends in Horncastle

The chart displays monthly precipitation patterns in Horncastle, 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 Horncastle, April typically receives around 33 mm (1.3 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec446057337280778164786071
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in Horncastle

In Horncastle in April humidity is 85%. With an average temperature of 9°C (48°F), this humidity feels like a damp chill enveloping you, making outdoor activities less enjoyable and requiring extra layers to stay warm and comfortable while traveling.

April Average Humidity in Horncastle

This chart illustrates the average monthly humidity levels in Horncastle, 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 Horncastle is approximately 85%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%87%86%85%83%83%80%78%84%88%89%88%
Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in Horncastle

In Horncastle 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 Horncastle.

Maximum UV Index Levels in Horncastle for April

The chart shows the monthly maximum UV Index (UVI) for Horncastle 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 Horncastle typically reaches 5, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec124578875321
Data source: Horncastle 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 Horncastle Compares to Other Months

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

This table compares monthly weather conditions in Horncastle, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (40°F)44 mm (1.7 inches)89%low
February Weather6°C (42°F)60 mm (2.3 inches)87%low
March Weather7°C (45°F)57 mm (2.2 inches)86%moderate
April Weather9°C (48°F)33 mm (1.3 inches)85%moderate
May Weather12°C (54°F)72 mm (2.8 inches)83%high
June Weather15°C (60°F)80 mm (3.2 inches)83%very high
July Weather17°C (64°F)77 mm (3.0 inches)79%very high
August Weather17°C (63°F)80 mm (3.2 inches)78%high
September Weather15°C (58°F)64 mm (2.5 inches)84%moderate
October Weather11°C (53°F)78 mm (3.1 inches)88%moderate
November Weather8°C (46°F)60 mm (2.3 inches)89%low
December Weather5°C (42°F)71 mm (2.8 inches)88%low

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