Last updated: February 24, 2025
In August, Flagstaff, United States experiences a blend of warm and mild weather, with maximum temperatures reaching up to 33°C (92°F) and an average of 20°C (69°F). The nights cool down to a refreshing 9°C (48°F), providing a comfortable backdrop for evenings. Despite the summer heat, residents and visitors can expect 69 mm (2.7 in) of rainfall over 13 days, highlighting the region’s sporadic yet vital precipitation. With a moderate humidity level of 41%, August offers a delightful mix of summer vibrancy and refreshing monsoon activity, making it an intriguing time to enjoy the natural beauty of Flagstaff.
In August, Flagstaff, United States, experiences pleasantly warm temperatures, where the minimum settles around 9°C (48°F) and the average reaches a comfortable 20°C (69°F). With a maximum that can soar to 33°C (92°F), this month marks a peak in warmth compared to the cooler temperatures of the preceding months. Notably, August reflects a transitional phase before the arrival of fall, as it maintains the high warmth seen in July yet hints at the cooler months ahead. The steady rise from winter lows all the way to summer highs sets the stage for enjoyable outdoor activities amidst a backdrop of stunning Arizona scenery, making August a prime time for residents and visitors alike.
In August, Flagstaff experiences a notable increase in precipitation, receiving 69 mm (2.7 in) of rain over 13 days, making it one of the wetter months of the year. This uptick follows July's impressive downpour of 148 mm (5.8 in), which is the peak of the monsoon season. Despite the decrease from July, August's rainfall contributes significantly to the annual total and helps maintain the lush greenery in the surrounding landscape. The combination of warm summer temperatures and regular rainfall creates a vibrant setting, perfect for outdoor activities before the seasons shift into the drier months of September and October. Overall, August showcases Flagstaff's dynamic weather patterns, where summer rains play a crucial role in sustaining the region's natural beauty.
As summer wanes in Flagstaff, United States, August brings a noticeable shift in humidity levels, with the average at 41%. This marks a subtle increase from the dry spell of July, which recorded a low of 33%. While the air remains relatively comfortable compared to the more oppressive humidity found in the winter months—ranging from 80% in January to 83% in February—August still juxtaposes the earlier spring and summer months. As the humidity slowly begins to rise again in September, reaching 59%, visitors can enjoy the mild transition of late summer while experiencing the refreshing change in the atmosphere. This pattern illustrates Flagstaff's distinctive climate, with a blend of dry and humid spells across the year, creating a unique weather experience.
In August, Flagstaff experiences a UV Index of 12, categorizing it as extreme with a burn time of just 10 minutes. This month continues the trend of high UV exposure seen since late spring, peaking in June and July at an index of 13. While August sees a slight decline from the summer's zenith, it remains crucial for residents and visitors to be vigilant about sun protection. Comparatively, as we look back through the months, the UV Index has steadily risen from a moderate level of 5 in January to the current extreme readings, underscoring the importance of awareness as the year progresses. For those navigating outdoor activities in Flagstaff, it's always wise to stay informed and protect your skin. Find more details on sun safety at Flagstaff UV Index.
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August in Flagstaff, United States, gracefully continues the summer's embrace with 348 hours of sunshine, marking a slight decline from the sun-drenched July. This vibrant month showcases the peak of the warm season, following a steady rise in sunlight hours from the depths of winter. As the days grow shorter towards the autumn months, August remains a golden transition, radiating warmth and brilliance before the crispness of September ushers in a new season. With each hour of sunshine, Flagstaff not only invites outdoor adventures but also paints the skies with stunning sunsets, making it a perfect time for both locals and visitors to bask in nature's beauty.
In August, Flagstaff experiences a 58% chance of sunny weather, marking a slight uptick compared to the preceding month of July, which sees a notably lower 31% likelihood of sunshine. This trend reflects a general pattern of increasing sunshine from the earlier months such as January (51%) through to May (77%), before dipping in June. Following July's decline, August offers a moderate promise of clearer skies, maintaining a positive trajectory into the latter half of summer. As the warm days of summer transition into the cooler fall months, with September and October boasting 67% chances of sun, August serves as a transitional period where residents can still savor summer's lingering warmth before the seasonal shift.
As summer transitions to fall in Flagstaff, United States, August offers a delightful balance of sunlight, with 13 hours of daylight. This duration is a slight decrease from the peak of 14 hours seen in June and July, hinting at the gradual shift towards shorter days. The lengthening shadows serve as a gentle reminder of the approaching autumn. Interestingly, the daylight duration remains substantial compared to the earlier months of the year, where January and February share a mere 10 hours each. This trend not only enriches August with warm, sunlit evenings but also signals the scenic changes that accompany the transition from summer's grace to the crisp charm of early fall. As daylight begins to wane, Flagstaff prepares to showcase its stunning autumn colors, inviting residents and visitors alike to bask in the last golden moments of summer.
In Flagstaff, August brings a gentle average wind speed of 2.4 m/s (5 mph), reminiscent of the lighter breezes that grace the onset of summer. While it’s consistent with the preceding months, it marks a slight recovery from July's calmest conditions at 2.0 m/s (4 mph). As the year progresses, the winds show a tendency to pick up in the spring months, peaking in April at 3.6 m/s (8 mph) before tapering off during the warmer summer. Notably, August maintains a steady rhythm, which, combined with the cooler evenings, creates a serene backdrop for outdoor activities. As autumn approaches, September sees a slight dip to 2.1 m/s (5 mph), hinting at a return to more variable conditions. Overall, the wind patterns in Flagstaff showcase a gentle ebb and flow, reflecting the region's dynamic climate throughout the year.
The weather in Flagstaff changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of August's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Flagstaff and find detailed weather information for every month.
August and January present stark contrasts in weather. In August, temperatures range from a mild 9°C (48°F) to a warm high of 33°C (92°F), with an average of 20°C (69°F). The month is relatively humid at 41% and experiences 69 mm (2.7 in) of precipitation over about 13 days. In contrast, January is characterized by cold temperatures, with a minimum of -18°C (0°F) and a maximum of just 14°C (58°F), averaging around 0°C (32°F). This winter month sees lower precipitation at 47 mm (1.8 in) spread across about 7 days, but the humidity is notably higher at 80%. For more details on January weather, check out Flagstaff weather in January.
August and February present a striking contrast in weather conditions. August enjoys a warm climate with temperatures ranging from a minimum of 9°C (48°F) to a maximum of 33°C (92°F), accompanied by an average temperature of 20°C (69°F). This month experiences 69 mm (2.7 in) of precipitation over approximately 13 days, with a humidity level of 41%. In stark comparison, February brings much colder temperatures, with a minimum of -19°C (-2°F), an average of just 1°C (34°F), and a maximum of 17°C (63°F). Precipitation in February is lower at 50 mm (2.0 in), spread over 7 days, and the humidity is notably higher at 83%. For more detailed insights on weather patterns, you can check out Flagstaff weather in February.
When comparing the weather in August and March, it's evident that these months offer stark contrasts in temperature and humidity. August boasts a milder range with minimum temperatures around 9°C (48°F) and maximums reaching up to 33°C (92°F), while March experiences significantly cooler conditions, with minimums plunging to -14°C (8°F) and maximums peaking at 20°C (69°F). Precipitation levels are relatively similar, with August receiving 69 mm (2.7 in) over 13 days compared to March's 61 mm (2.4 in) over 9 days. However, March is accompanied by higher humidity at 72%, opposed to August's 41%. For more detailed insights, you can check Flagstaff weather in March.
When comparing the weather in August and April, there is a stark difference in temperature and precipitation patterns. August typically enjoys warmer temperatures, with a minimum of 9°C (48°F) and an average of 20°C (69°F), peaking at a sweltering 33°C (92°F). In contrast, April's temperatures are much cooler, ranging from a minimum of -7°C (20°F) to an average of 9°C (49°F) and a maximum of 26°C (79°F). Precipitation is also significantly higher in August, with 69 mm (2.7 in) recorded over 13 days, compared to just 22 mm (0.9 in) over 4 days in April. Additionally, the humidity in April is notably higher at 63%, whereas August has a drier average of 41%. For more detailed information on April weather, you can check out Flagstaff weather in April.
In comparing the weather between May and August, it is clear that August tends to be significantly warmer. The average temperature in August reaches around 20°C (69°F), peaking at 33°C (92°F), while May's average is only 13°C (57°F), with a maximum of 30°C (86°F). Additionally, August experiences more precipitation, accumulating 69 mm (2.7 inches) over 13 days, compared to May's 32 mm (1.3 inches) over just 6 days. Interestingly, humidity levels are slightly lower in August at 41%, compared to May's 46%. For more specific details on May's climate, you can check out Flagstaff weather in May.
In comparing the weather of June and August, both months present a warm average temperature of around 20°C (69°F), but they differ significantly in their temperature extremes and precipitation levels. August sees higher maximum temperatures, reaching up to 33°C (92°F), compared to June's peak of 35°C (95°F). However, June experiences much lower precipitation, with just 11 mm (0.4 in) over 2 days, in contrast to August’s 69 mm (2.7 in) spread across 13 days. Humidity levels are also slightly higher in August at 41%, compared to June's 35%. For a more detailed look at June weather, you can explore Flagstaff weather in June.
In comparing the weather of August and July, August experiences slightly cooler temperatures, with an average of 20°C (69°F) compared to July's 21°C (70°F). However, July boasts higher maximum temperatures, reaching up to 35°C (95°F), while August peaks at 33°C (92°F). Notably, July also has significantly more rainfall, with 148 mm (5.8 in) of precipitation over 16 days, compared to August's 69 mm (2.7 in) over 13 days. Additionally, July tends to be more humid, with a humidity level of 33%, whereas August sees a slightly higher humidity of 41%. For more detailed insights about July weather, visit Flagstaff weather in July.
As summer transitions into fall, August and September exhibit notable differences in weather patterns. August boasts warmer temperatures, with a minimum of 9°C (48°F) and an average of 20°C (69°F), while September experiences cooler conditions, dipping to a minimum of -1°C (31°F) and an average of 17°C (63°F). Interestingly, both months share the same maximum temperature of 33°C (91°F), but September enjoys slightly less precipitation, receiving 49 mm (1.9 in) over 7 days compared to August's 69 mm (2.7 in) over 13 days. Additionally, September sees increased humidity at 59%, compared to August’s 41%. For more detailed information on September weather, check out Flagstaff weather in September.
August and October present distinct contrasts in weather patterns. In August, temperatures soar with a minimum of 9°C (48°F) and a maximum of 33°C (92°F), averaging around 20°C (69°F), while the month experiences significant rainfall, totaling 69 mm (2.7 in) over 13 rainy days and relatively low humidity at 41%. In contrast, October sees a notable drop in temperature, with lows reaching -8°C (17°F) and an average of 11°C (51°F), peaking at 26°C (80°F). Precipitation decreases to 34 mm (1.4 in) across just 5 days, but the humidity rises significantly to 70%, creating a distinctly cooler and wetter atmosphere. For more insights on the weather in October, visit Flagstaff weather in October.
August and November present stark contrasts in weather patterns. In August, temperatures range from a pleasant minimum of 9°C (48°F) to a sweltering maximum of 33°C (92°F), with an average of 20°C (69°F). The month experiences moderate rainfall, totaling 69 mm (2.7 in) over 13 days, and a relatively low humidity level of 41%. Conversely, November brings much colder conditions, with temperatures dropping to a minimum of -16°C (4°F) and an average of just 6°C (42°F), peaking at a maximum of 20°C (69°F). Precipitation is significantly less in November, accumulating only 30 mm (1.2 in) over 3 days, but humidity skyrockets to 79%. For a detailed look at November weather, you can check out Flagstaff weather in November.
August and December present starkly contrasting weather conditions. In August, temperatures are relatively warm, with an average of 20°C (69°F), peaking at a maximum of 33°C (92°F), while experiencing 69 mm (2.7 in) of rainfall over 13 days, accompanied by a humidity level of 41%. In contrast, December brings much colder temperatures, with an average of just 1°C (33°F) and lows diving to -20°C (-4°F). Precipitation decreases significantly to 36 mm (1.4 in), spread over only 6 days, and humidity rises to a much higher 82%. For more information on seasonal conditions, check out Flagstaff weather in December.
In August, Flagstaff experiences a delightful transition in weather, marked by relatively warmer temperatures compared to the earlier summer months. With an average of 20°C (69°F), the days can warm up significantly, reaching a maximum of 33°C (92°F), while the nights offer a refreshing coolness, dipping to about 9°C (48°F). This month stands out with a noticeable increase in precipitation, as 69 mm (2.7 in) of rain falls over approximately 13 days, nurturing the landscape and adding a burst of life before the cooler autumn settles in. Humidity levels hover around 41%, providing a comfortable balance that makes August a unique and vibrant time to experience Flagstaff. To explore more about the varying seasons and climate patterns, visit Flagstaff Climate.