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April Weather in Thornton, United States

Last updated: June 24, 2025

In Thornton, United States, the average temperature in April hovers around 19°C (67°F), with a minimum of 3°C (38°F) and a maximum reaching 33°C (91°F). Expect 116 mm (4.6 in) of precipitation spread over approximately 10 days, contributing to an average humidity level of 79%. Stay prepared for a mix of warm days and occasional rain!

April Temperature in Thornton

In April in Thornton, the average temperature is 19°C (67°F). Maximums can reach 33°C (91°F), and minimums can be as low as 3°C (38°F). This makes Thornton a great destination for travelers seeking mild weather and a chance to enjoy a variety of outdoor activities.

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

The chart illustrates April temperature patterns in Thornton, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Thornton, April typically has an average temperature of 19°C (67°F), with highs reaching up to 33°C (91°F) and lows dropping to around 3°C (38°F).
JanFebMarAprMayJunJulAugSepOctNovDec505262677582868681705954
Data source: Temperature data for Thornton 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 Thornton

In Thornton in April, the total precipitation amount is 116 mm (4.6 in) over a span of 10 days.

April Precipitation Trends in Thornton

The chart displays monthly precipitation patterns in Thornton, 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 Thornton, April typically receives around 116 mm (4.6 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec7810297116168755984981096791
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in Thornton

In Thornton in April, humidity is 79%. With an average temperature of 19°C (67°F), this humidity feels like a warm, enveloping blanket that makes traveling a bit more challenging, as the air is thick and can leave you feeling sluggish during outdoor adventures.

April Average Humidity in Thornton

This chart illustrates the average monthly humidity levels in Thornton, 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 Thornton is approximately 79%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec80%80%78%79%81%77%71%67%69%73%82%87%
Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in Thornton

In Thornton in April, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Thornton.

Maximum UV Index Levels in Thornton for April

The chart shows the monthly maximum UV Index (UVI) for Thornton 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 Thornton typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec478111111121110864
Data source: Thornton 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 Thornton Compares to Other Months

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

This table compares monthly weather conditions in Thornton, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather10°C (50°F)78 mm (3.1 inches)79%moderate
February Weather11°C (52°F)102 mm (4.0 inches)80%high
March Weather17°C (63°F)97 mm (3.8 inches)78%very high
April Weather19°C (67°F)116 mm (4.6 inches)79%extreme
May Weather24°C (76°F)168 mm (6.6 inches)81%extreme
June Weather28°C (82°F)75 mm (3.0 inches)77%extreme
July Weather30°C (86°F)59 mm (2.3 inches)71%extreme
August Weather30°C (87°F)84 mm (3.3 inches)67%extreme
September Weather27°C (81°F)98 mm (3.9 inches)69%very high
October Weather21°C (71°F)109 mm (4.3 inches)73%very high
November Weather15°C (59°F)67 mm (2.6 inches)82%high
December Weather12°C (54°F)91 mm (3.6 inches)87%moderate

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