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May Weather in Flagstaff, South Africa

Last updated: August 31, 2025

In May, the average temperature in Flagstaff, South Africa is a comfortable 15°C (60°F), with a minimum dipping to 2°C (37°F) and a maximum soaring to 30°C (87°F). Expect a bit of rain, with 33 mm (1.3 in) of precipitation spread over 4 days. Humidity levels are notably high at 88%, adding a touch of mugginess to the air. Stay prepared for varying conditions!

May Temperature in Flagstaff

In May, in Flagstaff, the average temperature is 15°C (60°F). Maximum temperatures can reach 30°C (87°F), while the minimum can dip as low as 2°C (37°F). Travelers should prepare for a mix of warm and cool weather, ensuring they pack accordingly for a comfortable experience.

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

The chart illustrates May 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, May typically has an average temperature of 15°C (60°F), with highs reaching up to 30°C (87°F) and lows dropping to around 2°C (37°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.

May Precipitation in Flagstaff

In Flagstaff in May, the precipitation amount is 33 mm (1.3 in) over a span of 4 days.

May Precipitation Trends in Flagstaff

The chart displays monthly precipitation patterns in Flagstaff, with values for each month alongside May’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May’s conditions compare to those of other months. In Flagstaff, May typically receives around 33 mm (1.3 inches) of precipitation spread over approximately 4 days.
JanFebMarAprMayJunJulAugSepOctNovDec106131968933236384184102120
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Flagstaff

In Flagstaff in May humidity is 88%. With an average temperature of 15°C (60°F), this humidity feels like a damp embrace, making travel feel sluggish and heavy, as the air clings to your skin and every step requires more effort than usual.

May Average Humidity in Flagstaff

This chart illustrates the average monthly humidity levels in Flagstaff, with May’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In May, average humidity in Flagstaff is approximately 88%, 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 May generated using information from the Copernicus Climate Change Service.

May UV Index in Flagstaff

In Flagstaff in May, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in Flagstaff, you can refer to this Hourly UV Index in Flagstaff.

Maximum UV Index Levels in Flagstaff for May

The chart shows the monthly maximum UV Index (UVI) for Flagstaff in May, 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 May, the maximum UV index in Flagstaff typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec1514129645710121316
Data source: Flagstaff May 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 May 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 May’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 May’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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