Last updated: February 24, 2025
In January, Flagstaff experiences a diverse range of winter weather conditions, with maximum temperatures reaching 14°C (58°F) and an average hovering around 0°C (32°F). The city can see minimum temperatures dip to a chilly -18°C (0°F), making bundled layers a necessity. Over the course of the month, residents and visitors alike should prepare for precipitation, totaling approximately 47 mm (1.8 in) across about 7 days, contributing to the area's characteristic winter landscape. With an average humidity of 80%, the crisp air often brings a feeling of freshness, perfect for enjoying winter activities in this picturesque locale.
In January, Flagstaff, United States, showcases a winter wonderland characterized by crisp temperatures that predominantly hover around freezing. The month kicks off with a chilly minimum of -18°C (0°F), progressing to a mild average of 0°C (32°F) and peaking at a comfortable 14°C (58°F). As the month unfolds, the snowy landscape invites outdoor activities while the gradient from stark cold to milder afternoons is a hallmark of the season. Notably, each January in Flagstaff reflects the broader trend of limited temperature fluctuations, soothing those who relish the robust beauty of winter, but hinting at the gradual warmth that awaits with the arrival of February. With lows dipping only slightly lower than January's, February continues this gradual transition toward spring, maintaining the charm of high-altitude winter.
In January, Flagstaff experiences moderate precipitation with an average of 47 mm (1.8 in) of rainfall over about 7 days. This sets the stage for a winter landscape, complementing the region's snowy peaks. As the year progresses into February and March, precipitation gradually increases, peaking in March with 61 mm (2.4 in), suggesting a trend of rising moisture levels as spring approaches. However, the transition into spring brings about a noticeable decline, with April dropping to 22 mm (0.9 in). The summer months, particularly July, present a stark contrast, characterized by a dramatic spike in precipitation to 148 mm (5.8 in) over 16 days, indicative of the seasonal monsoons. This trend of fluctuating rainfall continues into the autumn months, emphasizing Flagstaff's dynamic climate, where November and December see a return to more modest levels of precipitation, rounding out the year with a blend of wet and dry patterns.
In January, Flagstaff experiences a high humidity level of 80%, setting the stage for a relatively moist start to the year. This trend continues into February, peaking slightly at 83%, before a noticeable drop in March to 72%. As spring approaches, humidity steadily decreases, reaching its lowest point in June and July at just 35-33%. This significant decline reflects the dry warmth that defines the summer months. However, as the seasons transition towards autumn and winter, humidity begins to rise again, climbing back to 70% in October and returning to near January's levels by December at 82%. Overall, the data reveals a clear seasonal pattern: a winter-spring wetness, a summer dry spell, and a return to moisture in the fall, showcasing Flagstaff's unique climatic rhythm.
In January, Flagstaff experiences a moderate UV Index of 5, with a burn time of about 30 minutes for unprotected skin. This marks the transition from the cooler months, as UV exposure gradually increases leading into spring. By February, the index climbs to 8, indicating very high exposure risks and a significantly shorter burn time of just 15 minutes. This upward trend continues through the ensuing months, peaking at an extreme UV Index of 13 in both June and July, where burn times drop to a mere 10 minutes. Interestingly, while September sees a slight decrease to 11, the exposure category remains extreme until the UV Index wanes in autumn. As winter approaches again, the index drops back down to 4 in December, suggesting a cycle of fluctuating UV exposure throughout the year. For more detailed information, you can visit the Flagstaff UV Index.
UV Risk Categories
As January unfolds in Flagstaff, the region basks in 188 hours of sunshine—setting the stage for a gradual increase in daylight as winter gives way to spring. In February, sunlight rises to 242 hours, hinting at the burgeoning warmth ahead. March continues this trend with 301 hours, and by April, residents can revel in 331 hours of bright skies. As the days lengthen into May and June, sunshine peaks at 374 and 375 hours, inviting outdoor adventurers to explore the stunning landscapes. This summer glow softens in July and August, with 361 and 348 hours, yet still provides plenty of sunlit days. The gentle decline begins in September, bringing 316 hours, while October and November see further decreases to 294 and 258 hours, respectively. By December, the sunshine retreats to 232 hours, closing the year as it began—quietly and modestly. Overall, Flagstaff enjoys a clear trend of escalating sunshine hours from the start of the year, culminating in a vibrant summer before tapering off into the winter months again.
In January, Flagstaff, United States, experiences a 51% chance of sunny weather, marking it as the month with the lowest likelihood of sunshine compared to the rest of the year. This trend shifts noticeably in February, where the chances of clear skies rise to 71%, indicating a gradual transition toward sunnier conditions. As spring approaches, the probability of sunny days continues to climb, peaking in May at 77%. The sunshine dips again in the height of summer, particularly in July with only a 31% chance, suggesting a shift towards more unpredictable weather. However, the pattern stabilizes in the fall, where September and October return to a more favorable 67% likelihood of sun, illustrating the seasonal variability characteristic of Flagstaff’s climate.
In January, Flagstaff enjoys around 10 hours of daylight, a duration that remains consistent into February before gradually increasing in March to 11 hours. As spring approaches in April, daylight extends to 13 hours, providing a refreshing boost, which peaks at a maximum of 14 hours during the summer months from May to July. This abundant sunshine begins to wane in August, transitioning to 13 hours, and further diminishing as autumn sets in, wrapping up the year with 11 hours in October and dropping to 9 hours by December. This trend highlights the rhythmic shift of daylight throughout the year, reflecting the natural cycles of Flagstaff's beautiful seasons.
In January, Flagstaff experiences an average wind speed of 2.4 m/s (5 mph), setting a calm tone for the month. This gentle breeze is part of a broader trend where the winter months, particularly January and July, showcase the lowest wind speeds of the year, with January slightly edging out July’s lightest gusts at 2.0 m/s (4 mph). As the seasons transition into spring, winds gradually pick up, peaking in April at 3.6 m/s (8 mph), before tapering off again in the late summer. Overall, January serves as a tranquil start to the year, punctuated by a serene atmosphere that invites both relaxation and reflection amidst the scenic backdrop of Flagstaff.
The weather in Flagstaff changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of January'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.
In January, temperatures in Flagstaff range from a chilling minimum of -18°C (0°F) to a maximum of 14°C (58°F), with an average temperature hovering around freezing at 0°C (32°F). The month sees about 47 mm (1.8 in) of precipitation across 7 days, accompanied by a humidity level of 80%. In contrast, February experiences slightly colder nights with a minimum of -19°C (-2°F), but slightly warmer days, peaking at 17°C (63°F) and an average of 1°C (34°F). Precipitation increases slightly to 50 mm (2.0 in), also spread over 7 days, while humidity rises to 83%. For more detailed insights on February weather patterns, check out Flagstaff weather in February.
In January, temperatures can plunge to a minimum of -18°C (0°F), with an average of around 0°C (32°F) and a maximum of 14°C (58°F). The month experiences precipitation of 47 mm (1.8 in) over about 7 days, coupled with relatively high humidity at 80%. By March, the weather begins to warm up, with minimum temperatures of -14°C (8°F), an average of 4°C (39°F), and a peak of 20°C (69°F). March sees increased precipitation at 61 mm (2.4 in) over approximately 9 days, while humidity drops to 72%. This transition marks a notable shift from the cold, damp January to the more moderate and wet conditions of March. For a detailed look at what to expect, check out Flagstaff weather in March.
January and April present contrasting meteorological conditions. In January, temperatures can plunge as low as -18°C (0°F) and average around 0°C (32°F), with maximum readings reaching 14°C (58°F). This month also sees a higher level of precipitation, averaging 47 mm over approximately 7 days, combined with an 80% humidity level, making it quite chilly and damp. In stark contrast, April experiences milder temperatures, with a minimum of -7°C (20°F) and an average of 9°C (49°F), peaking at a pleasant 26°C (79°F). The month has significantly less precipitation at 22 mm, occurring over just 4 days, and a reduced humidity level of 63%, heralding the approach of warmer weather. For more details, you can check Flagstaff weather in April.
January and May present stark contrasts in weather conditions. January experiences frigid temperatures, with a minimum of -18°C (0°F) and an average of 0°C (32°F), while May sees a much more temperate climate, ranging from a minimum of -3°C (27°F) to an average of 13°C (57°F), peaking at a maximum of 30°C (86°F). Precipitation is slightly higher in January at 47 mm (1.8 in) over about 7 days, compared to May's 32 mm (1.3 in) spread across 6 days. Additionally, humidity levels are notably higher in January at 80%, while May offers a more comfortable 46%. For more detailed insights on the weather during this time, check out Flagstaff weather in May.
January and June present stark contrasts in weather conditions. In January, temperatures can drop as low as -18°C (0°F), with an average of around 0°C (32°F) and a maximum of 14°C (58°F). The month experiences considerable humidity at 80% and receives about 47 mm (1.8 in) of precipitation over approximately 7 days. In contrast, June brings much warmer weather, with temperatures ranging from a minimum of 3°C (37°F) to a maximum of 35°C (95°F) and an average temperature of 20°C (69°F). The humidity decreases significantly to 35%, and rainfall is minimal, totaling only 11 mm (0.4 in) over just 2 days. For more detailed information, check out Flagstaff weather in June.
In January, the weather is characterized by harsh cold, with temperatures ranging from a chilling -18°C (0°F) at night to a maximum of 14°C (58°F) during the day, accompanied by high humidity levels at 80%. Precipitation is relatively low, averaging 47 mm (1.8 in) over seven days. In contrast, July brings a dramatic shift with much milder conditions. Temperatures range from a minimum of 9°C (48°F) to a sweltering maximum of 35°C (95°F), along with significantly lower humidity levels at 33%. However, July experiences more frequent rain, with total precipitation reaching 148 mm (5.8 in) over sixteen days. For more specific details, you can check Flagstaff weather in July.
In January, the weather is markedly colder, with temperatures ranging from a frigid -18°C (0°F) at night to a maximum of 14°C (58°F) during the day, and an average temperature hovering around 0°C (32°F). The month sees considerable humidity at 80% and approximately 47 mm (1.8 in) of precipitation over about 7 days. In contrast, August brings much milder temperatures, with a minimum of 9°C (48°F) and a warm average of 20°C (69°F), peaking at 33°C (92°F). Although August experiences slightly higher precipitation at 69 mm (2.7 in) across 13 days, the humidity drops significantly to 41%. For more detailed insights into August weather conditions, visit Flagstaff weather in August.
In January, temperatures can plunge as low as -18°C (0°F), with an average of around 0°C (32°F) and a maximum of 14°C (58°F). The month typically sees 47 mm (1.8 in) of precipitation over seven days, accompanied by high humidity levels of 80%, creating a stark contrast to the weather in September. In September, the temperature range is much milder, with a minimum of -1°C (31°F), an average of 17°C (63°F), and a maximum reaching 33°C (91°F). The precipitation remains similar at 49 mm (1.9 in) over seven days, but the humidity drops to 59%, leading to a more comfortable and pleasant atmosphere. For more details on the September weather, check out Flagstaff weather in September.
In January, the weather is considerably colder, with temperatures ranging from a frigid -18°C (0°F) to a maximum of 14°C (58°F) and an average of around 0°C (32°F). The month sees about 47 mm (1.8 in) of precipitation over approximately 7 days, accompanied by high humidity levels of 80%. In contrast, October offers a milder climate, with temperatures ranging from -8°C (17°F) to a warmer 26°C (80°F) and an average of 11°C (51°F). Precipitation in October is lower at 34 mm (1.4 in) and occurs over just 5 days, along with a reduced humidity level of 70%. For more insights into the climate, check out Flagstaff weather in October.
January and November present distinctly different weather conditions. In January, temperatures reach a minimum of -18°C (0°F) and can peak at 14°C (58°F), with an average around freezing at 0°C (32°F). The month sees about 47 mm (1.8 in) of precipitation over approximately 7 days, accompanied by high humidity levels at 80%. In contrast, November experiences slightly milder temperatures, with a minimum of -16°C (4°F) and maximums soaring to 20°C (69°F), as well as an average temperature of 6°C (42°F). Precipitation in November is lower at 30 mm (1.2 in), falling over just 3 days, and humidity remains close to January at 79%. Overall, November offers a more temperate climate compared to the severe chill of January. For more specific weather details in November, visit Flagstaff weather in November.
In comparing January and December weather, both months exhibit chilly temperatures, but January tends to be slightly milder overall. In December, the minimum temperature can drop to -20°C (-4°F), while January's minimum is a tad warmer at -18°C (0°F). The average temperature in January hovers around 0°C (32°F), just below December's average of 1°C (33°F). Precipitation is slightly higher in January at 47 mm (1.8 in) over 7 days, compared to December's 36 mm (1.4 in) over 6 days. Humidity levels remain similar, with January at 80% and December at 82%. For a more detailed look at December's climate, check out Flagstaff weather in December.
In January, Flagstaff experiences a distinct chill, setting it apart from the milder months of the year. With average temperatures hovering around freezing, the stark contrast between the maximums and minimums can be striking, often plunging to well below zero during the night. This month also brings significant precipitation in the form of snow, contributing to the region's winter wonderland atmosphere. The elevated humidity further enhances the raw winter feel, making January not just the coldest but also arguably the most atmospheric month. For a more detailed understanding of what to expect throughout the year, explore the comprehensive information available at Flagstaff Climate.