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April Weather in Flagstaff, South Africa

Last updated: August 31, 2025

In April, the average temperature in Flagstaff, South Africa is a comfortable 17°C (64°F). However, be prepared for a range, as temperatures can dip to a chilly 7°C (44°F) or soar to a sizzling 35°C (96°F). This month typically sees 89 mm (3.5 in) of precipitation spread over 11 days, contributing to a high average humidity of 89%.

April Temperature in Flagstaff

In April in Flagstaff, the average temperature is 17°C (64°F), with maximums reaching 35°C (96°F) and minimums dipping as low as 7°C (44°F). It's advisable to pack both lightweight clothing and warmer layers for your trip.

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

The chart illustrates April temperature patterns in Flagstaff, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Flagstaff, April typically has an average temperature of 17°C (64°F), with highs reaching up to 35°C (96°F) and lows dropping to around 7°C (44°F).
JanFebMarAprMayJunJulAugSepOctNovDec697068635956555761636467
Data source: Temperature data for Flagstaff 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 Flagstaff

In Flagstaff in April, the precipitation amount is 89 mm (3.5 in) over a span of 11 days.

April Precipitation Trends in Flagstaff

The chart displays monthly precipitation patterns in Flagstaff, 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 Flagstaff, April typically receives around 89 mm (3.5 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec106131968933236384184102120
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in Flagstaff

In Flagstaff in April, humidity is 89%. With an average temperature of 17°C (64°F), this humidity feels like walking through a warm, damp blanket, making outdoor activities quite challenging and uncomfortable for traveling.

April Average Humidity in Flagstaff

This chart illustrates the average monthly humidity levels in Flagstaff, 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 Flagstaff is approximately 89%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%88%89%89%88%82%77%72%82%83%88%88%
Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in Flagstaff

In Flagstaff 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 Flagstaff.

Maximum UV Index Levels in Flagstaff for April

The chart shows the monthly maximum UV Index (UVI) for Flagstaff 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 Flagstaff typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec1514129645710121316
Data source: Flagstaff 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 Flagstaff Compares to Other Months

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

This table compares monthly weather conditions in Flagstaff, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather21°C (70°F)106 mm (4.2 inches)88%extreme
February Weather21°C (70°F)131 mm (5.2 inches)88%extreme
March Weather20°C (68°F)96 mm (3.8 inches)89%extreme
April Weather17°C (64°F)89 mm (3.5 inches)89%very high
May Weather15°C (60°F)33 mm (1.3 inches)88%high
June Weather13°C (56°F)23 mm (0.9 inches)82%moderate
July Weather13°C (56°F)6 mm (0.2 inches)77%moderate
August Weather14°C (57°F)37 mm (1.5 inches)72%high
September Weather16°C (61°F)41 mm (1.6 inches)82%very high
October Weather17°C (63°F)84 mm (3.3 inches)83%extreme
November Weather18°C (64°F)102 mm (4.0 inches)87%extreme
December Weather19°C (67°F)120 mm (4.7 inches)88%extreme

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