January Weather in Flagstaff, South Africa

Last updated: August 31, 2025

In January, the average temperature in Flagstaff, South Africa is a comfortable 21°C (70°F). However, don’t be surprised by the extremes, as temperatures can dip to a minimum of 11°C (51°F) and soar up to a maximum of 37°C (99°F). Expect a fair amount of rain, with 106 mm (4.2 in) of precipitation over about 15 days. Plus, with an average humidity of 88%, it’s wise to stay hydrated while exploring this vibrant destination!

January Temperature in Flagstaff

In January in Flagstaff, the average temperature is 21°C (70°F), with maximums reaching 37°C (99°F) and minimums dropping to as low as 11°C (51°F). This range makes it a perfect time for travelers seeking both warm days and cooler evenings.

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

The chart illustrates January 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, January typically has an average temperature of 21°C (70°F), with highs reaching up to 37°C (99°F) and lows dropping to around 11°C (51°F).

Data source: Temperature data for Flagstaff generated using information from the Copernicus Climate Change Service.

January Precipitation in Flagstaff

In Flagstaff in January, the total precipitation amount is 106 mm (4.2 in) over the course of 15 days.

January Precipitation Trends in Flagstaff

The chart displays monthly precipitation patterns in Flagstaff, with values for each month alongside January’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how January’s conditions compare to those of other months. In Flagstaff, January typically receives around 106 mm (4.2 inches) of precipitation spread over approximately 15 days.

Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

January Humidity in Flagstaff

In Flagstaff in January, humidity is 88%. With an average temperature of 21°C (70°F), this humidity feels like a thick blanket enveloping you, making every step feel heavier and slightly stifling, which can be quite challenging for travelers.

January Average Humidity in Flagstaff

This chart illustrates the average monthly humidity levels in Flagstaff, with January’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In January, average humidity in Flagstaff is approximately 88%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Flagstaff

In Flagstaff in January, the maximum UV index reaches an alarming 15, which falls into the extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take precautions. For detailed information, you can check the Hourly UV Index in Flagstaff.

Maximum UV Index Levels in Flagstaff for January

The chart shows the monthly maximum UV Index (UVI) for Flagstaff in January, 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 January, the maximum UV index in Flagstaff typically reaches 15, which falls under the extreme exposure category.

Data source: Flagstaff January 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 January 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 January’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 January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	21°C (70°F)	106 mm (4.2 inches)	88%	extreme
February Weather	21°C (70°F)	131 mm (5.2 inches)	88%	extreme
March Weather	20°C (68°F)	96 mm (3.8 inches)	89%	extreme
April Weather	17°C (64°F)	89 mm (3.5 inches)	89%	very high
May Weather	15°C (60°F)	33 mm (1.3 inches)	88%	high
June Weather	13°C (56°F)	23 mm (0.9 inches)	82%	moderate
July Weather	13°C (56°F)	6 mm (0.2 inches)	77%	moderate
August Weather	14°C (57°F)	37 mm (1.5 inches)	72%	high
September Weather	16°C (61°F)	41 mm (1.6 inches)	82%	very high
October Weather	17°C (63°F)	84 mm (3.3 inches)	83%	extreme
November Weather	18°C (64°F)	102 mm (4.0 inches)	87%	extreme
December Weather	19°C (67°F)	120 mm (4.7 inches)	88%	extreme