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April Weather in Londonderry, United States

Last updated: June 24, 2025

In April, the average temperature in Londonderry, United States hovers around 6°C (43°F). While you might experience a chilly minimum of -10°C (15°F), the mercury can also rise to a pleasant maximum of 25°C (78°F). Expect around 131 mm (5.2 in) of precipitation over 15 days, contributing to a relatively high average humidity of 84%.

April Temperature in Londonderry

In April in Londonderry, the average temperature is 6°C (43°F). Maximum temperatures can reach 25°C (78°F), while minimums can drop as low as -10°C (15°F). Be prepared for a wide range of weather conditions when traveling during this month.

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

The chart illustrates April temperature patterns in Londonderry, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Londonderry, April typically has an average temperature of 6°C (43°F), with highs reaching up to 25°C (78°F) and lows dropping to around -10°C (15°F).
JanFebMarAprMayJunJulAugSepOctNovDec212430435564696760493425
Data source: Temperature data for Londonderry 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 Londonderry

In Londonderry in April, the precipitation amount is 131 mm (5.2 in) over a span of 15 days.

April Precipitation Trends in Londonderry

The chart displays monthly precipitation patterns in Londonderry, 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 Londonderry, April typically receives around 131 mm (5.2 inches) of precipitation spread over approximately 15 days.
JanFebMarAprMayJunJulAugSepOctNovDec78917813110311416312095157107105
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in Londonderry

In Londonderry in April, humidity is 84%. With an average temperature of 6°C (43°F), this humidity feels like a damp chill that penetrates your clothing, making outdoor excursions uncomfortable and prompting travelers to seek refuge indoors or find warm, sheltered spots to enjoy their surroundings.

April Average Humidity in Londonderry

This chart illustrates the average monthly humidity levels in Londonderry, 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 Londonderry is approximately 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec90%88%86%84%76%72%67%64%72%81%87%85%
Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in Londonderry

In Londonderry 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 Londonderry.

Maximum UV Index Levels in Londonderry for April

The chart shows the monthly maximum UV Index (UVI) for Londonderry 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 Londonderry typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec34681010997632
Data source: Londonderry 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 Londonderry Compares to Other Months

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

This table compares monthly weather conditions in Londonderry, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-6°C (21°F)78 mm (3.1 inches)89%moderate
February Weather-5°C (24°F)91 mm (3.6 inches)88%moderate
March Weather-1°C (31°F)78 mm (3.1 inches)86%high
April Weather6°C (43°F)131 mm (5.2 inches)84%very high
May Weather13°C (55°F)103 mm (4.0 inches)76%very high
June Weather18°C (64°F)114 mm (4.5 inches)72%very high
July Weather21°C (69°F)163 mm (6.4 inches)66%very high
August Weather20°C (67°F)120 mm (4.7 inches)64%very high
September Weather16°C (61°F)95 mm (3.7 inches)72%high
October Weather9°C (49°F)157 mm (6.2 inches)81%high
November Weather1°C (35°F)107 mm (4.2 inches)87%moderate
December Weather-4°C (26°F)105 mm (4.1 inches)84%low

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