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April Weather in Slave Lake, Canada

Last updated: June 18, 2025

In April, the average temperature in Slave Lake, Canada hovers around 1°C (34°F). However, temperatures can vary dramatically, with a minimum of -26°C (-15°F) and a peak reaching 24°C (76°F). Expect about 34 mm (1.3 in) of precipitation spread over 8 days and an average humidity of 78%, making for a unique climate experience!

April Temperature in Slave Lake

In April in Slave Lake, the average temperature is 1°C (34°F), with maximums reaching 24°C (76°F) and minimums dropping as low as -26°C (-15°F). Be prepared for a wide range of temperatures, making layering essential for your travels.

April Weather in Slave Lake: Daily Temperature Highs, Lows, and Averages

The chart illustrates April temperature patterns in Slave Lake, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Slave Lake, April typically has an average temperature of 1°C (34°F), with highs reaching up to 24°C (76°F) and lows dropping to around -26°C (-15°F).
JanFebMarAprMayJunJulAugSepOctNovDec12822345057615848362214
Data source: Temperature data for Slave Lake 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 Slave Lake

In Slave Lake in April, the precipitation amount is 34 mm (1.3 in) over a span of 8 days.

April Precipitation Trends in Slave Lake

The chart displays monthly precipitation patterns in Slave Lake, 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 Slave Lake, April typically receives around 34 mm (1.3 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec22242334411131216756444022
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in Slave Lake

In Slave Lake in April, humidity is 78%. With an average temperature of 1°C (34°F), this humidity feels like an extra layer of chill in the air, making travel uncomfortable and damp, often leading to a persistent sense of cold that can seep into your bones, leaving you wishing for a warm shelter.

April Average Humidity in Slave Lake

This chart illustrates the average monthly humidity levels in Slave Lake, 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 Slave Lake is approximately 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%93%91%78%70%70%79%78%73%81%85%93%
Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in Slave Lake

In Slave Lake 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 Slave Lake.

Maximum UV Index Levels in Slave Lake for April

The chart shows the monthly maximum UV Index (UVI) for Slave Lake 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 Slave Lake typically reaches 5, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec124577776311
Data source: Slave Lake 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 Slave Lake Compares to Other Months

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

This table compares monthly weather conditions in Slave Lake, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-11°C (12°F)21 mm (0.8 inches)88%low
February Weather-13°C (8°F)24 mm (0.9 inches)93%low
March Weather-6°C (22°F)23 mm (0.9 inches)90%moderate
April Weather1°C (34°F)34 mm (1.3 inches)78%moderate
May Weather10°C (50°F)41 mm (1.6 inches)70%high
June Weather14°C (58°F)113 mm (4.4 inches)70%high
July Weather16°C (61°F)121 mm (4.7 inches)79%high
August Weather14°C (58°F)67 mm (2.7 inches)78%high
September Weather9°C (49°F)55 mm (2.2 inches)73%high
October Weather2°C (36°F)44 mm (1.7 inches)81%moderate
November Weather-6°C (22°F)40 mm (1.6 inches)85%low
December Weather-10°C (14°F)22 mm (0.9 inches)93%low

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