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April Weather in Waltham, United Kingdom

Last updated: August 27, 2025

In April, the average temperature in Waltham, United Kingdom hovers around 9°C (48°F). However, be prepared for a range of conditions, as temperatures can drop to a minimum of -2°C (29°F) or rise to a pleasant 25°C (76°F). Expect 33 mm (1.3 in) of precipitation spread over 8 days, with an average humidity of 85%, creating a cool and refreshing atmosphere.

April Temperature in Waltham

In April in Waltham, the average temperature is 9°C (48°F). Maximum temperatures can reach 25°C (76°F), while minimums can drop as low as -2°C (29°F). Be prepared for a range of temperatures and pack accordingly for your travels.

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

The chart illustrates April temperature patterns in Waltham, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Waltham, April typically has an average temperature of 9°C (48°F), with highs reaching up to 25°C (76°F) and lows dropping to around -2°C (29°F).
JanFebMarAprMayJunJulAugSepOctNovDec414245475359636358534642
Data source: Temperature data for Waltham 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 Waltham

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

April Precipitation Trends in Waltham

The chart displays monthly precipitation patterns in Waltham, 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 Waltham, April typically receives around 33 mm (1.3 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec435658336678788165756268
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in Waltham

In Waltham 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 Waltham

This chart illustrates the average monthly humidity levels in Waltham, 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 Waltham 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 Waltham

In Waltham 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 Waltham.

Maximum UV Index Levels in Waltham for April

The chart shows the monthly maximum UV Index (UVI) for Waltham 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 Waltham typically reaches 5, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec123578875321
Data source: Waltham 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 Waltham Compares to Other Months

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

This table compares monthly weather conditions in Waltham, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (41°F)43 mm (1.7 inches)89%low
February Weather6°C (43°F)56 mm (2.2 inches)87%low
March Weather7°C (45°F)58 mm (2.3 inches)86%moderate
April Weather9°C (48°F)33 mm (1.3 inches)85%moderate
May Weather12°C (54°F)66 mm (2.6 inches)83%high
June Weather15°C (60°F)78 mm (3.1 inches)83%very high
July Weather17°C (63°F)78 mm (3.1 inches)79%very high
August Weather17°C (63°F)81 mm (3.2 inches)78%high
September Weather15°C (58°F)65 mm (2.5 inches)84%moderate
October Weather11°C (53°F)75 mm (2.9 inches)88%moderate
November Weather8°C (47°F)62 mm (2.4 inches)89%low
December Weather6°C (42°F)68 mm (2.7 inches)88%low

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