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April Weather in Grafton, United States

Last updated: June 24, 2025

In April, the average temperature in Grafton, United States hovers around 11°C (53°F). Expect a range of -6°C (22°F) to 29°C (84°F), showcasing the region's variability. With an average precipitation of 152 mm (6.0 in) spread over 17 days, be prepared for some wet weather. Additionally, the average humidity level is a high 86%, making it feel quite damp throughout the month.

April Temperature in Grafton

In April in Grafton, the average temperature is 11°C (53°F). The maximum can reach 29°C (84°F) while the minimum can drop as low as -6°C (22°F). Travelers should be prepared for a wide range of temperatures during this time.

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

The chart illustrates April temperature patterns in Grafton, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Grafton, April typically has an average temperature of 11°C (53°F), with highs reaching up to 29°C (84°F) and lows dropping to around -6°C (22°F).
JanFebMarAprMayJunJulAugSepOctNovDec333843526369737267574338
Data source: Temperature data for Grafton 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 Grafton

In Grafton in April, the precipitation amount is 152 mm (6.0 in) over the course of 17 days.

April Precipitation Trends in Grafton

The chart displays monthly precipitation patterns in Grafton, 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 Grafton, April typically receives around 152 mm (6.0 inches) of precipitation spread over approximately 17 days.
JanFebMarAprMayJunJulAugSepOctNovDec10215912215216014511511411312089134
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in Grafton

In Grafton in April, humidity is 86%. With an average temperature of 11°C (53°F), this humidity feels like a heavy blanket that dampens the air, making traveling uncomfortable and a bit stifling.

April Average Humidity in Grafton

This chart illustrates the average monthly humidity levels in Grafton, 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 Grafton is approximately 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%88%88%87%82%84%82%73%74%81%89%86%
Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in Grafton

In Grafton in April, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Grafton.

Maximum UV Index Levels in Grafton for April

The chart shows the monthly maximum UV Index (UVI) for Grafton 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 Grafton typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3579101010108753
Data source: Grafton 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 Grafton Compares to Other Months

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

This table compares monthly weather conditions in Grafton, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather0°C (33°F)102 mm (4.0 inches)88%moderate
February Weather3°C (38°F)159 mm (6.2 inches)88%moderate
March Weather6°C (44°F)122 mm (4.8 inches)88%high
April Weather11°C (53°F)152 mm (6.0 inches)86%very high
May Weather17°C (63°F)160 mm (6.3 inches)82%very high
June Weather20°C (69°F)145 mm (5.7 inches)84%very high
July Weather23°C (74°F)115 mm (4.5 inches)82%very high
August Weather22°C (72°F)114 mm (4.5 inches)73%very high
September Weather19°C (67°F)113 mm (4.5 inches)73%very high
October Weather14°C (58°F)120 mm (4.7 inches)81%high
November Weather6°C (43°F)89 mm (3.5 inches)89%moderate
December Weather3°C (38°F)134 mm (5.3 inches)86%moderate

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