Last updated: February 24, 2025
In Phoenix, United States, December brings a mild yet variable climate, with maximum temperatures reaching 28°C (83°F) and an average of 13°C (55°F), providing a welcome respite from winter chills. Nighttime temperatures can dip to a cool 0°C (32°F), showcasing the region's temperature fluctuation. Despite the comfortable daytime warmth, the month experiences 82% humidity, adding a slight dampness to the air. Rainfall is minimal, with an average precipitation amount of 23 mm (0.9 in) over just 4 days, making it a primarily dry time of the year. This blend of warmth, cool nights, and occasional showers creates a unique winter experience for both residents and visitors.
As December rolls into Phoenix, the temperatures begin to dip slightly, offering a refreshing contrast to the searing summer heat. With minimums around 0°C (32°F) and averages resting at 13°C (55°F), this month marks a transition toward cooler weather. The maximum temperature peaks at 28°C (83°F), providing ample opportunities to enjoy the crisp outdoor air during the day. Compared to previous months, December showcases a noticeable decline in temperatures, setting the stage for the vibrant winter season. As the city settles into this mild climate, residents can relish outdoor activities without the oppressive heat, making it a delightful time to experience Phoenix's rich offerings.
In December, Phoenix experiences a modest precipitation amount of 23 mm (0.9 in), falling over approximately 4 days. This marks a slight increase from the preceding months, particularly November's total of 21 mm spread across just one rainy day. The early winter month stands out for showcasing an uptick in rainfall after a notably dry fall, where October and November witnessed minimal precipitation. December's wettest days contribute to the overall trend of increasing moisture as the year closes, hinting at a shift towards the more temperate and variable winter climate that characterizes this desert region.
December in Phoenix, United States, marks a noticeable shift in humidity levels, reaching 82%, the highest for the year. This sharp increase reflects a trend where winter months—especially from late November to December—see a significant rise in moisture in the air, as temperatures drop and cooler, more humid weather patterns settle in. Throughout the year, humidity gradually decreases from a peak in January at 76%, hitting a low of just 33% in June and July. As the year draws to a close, the steady climb in December's humidity not only signifies the return of moisture but also provides a refreshing contrast to the dry, scorching summer months. This seasonal oscillation underscores Phoenix's unique climate, showcasing its transition from blistering heat to the cooler, more comfortable winter air.
In December, Phoenix experiences a moderate UV Index of 4, leading to a burn time of approximately 30 minutes for unprotected skin. This marks a bit of a respite compared to the extreme levels seen during the summer months, where the Index soared as high as 12 in June. As the year winds down, there's a notable trend of decreasing UV exposure, with January and November also reflecting similar moderate levels. While December offers a safer window for outdoor activities compared to the sweltering summer, it's still essential to be aware of the sun's intensity. For more detailed information, explore Phoenix UV Index.
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In December, Phoenix basks in a welcoming glow with approximately 240 hours of sunshine, offering a delightful escape as the year comes to a close. This month's sunshine hours mark a slight dip from the peak of 373 hours in May but remain a solid testament to the region's consistently bright climate. Throughout the year, sunshine hours show an upward trajectory, peaking in early summer, while December transitions back into a more moderate phase. Despite being one of the shorter months for sunlight, December still boasts a wealth of clear, sunny days, making it an ideal time for outdoor adventures and holiday festivities in this vibrant desert city.
In Phoenix, United States, December marks a transitional phase in sunny weather, with a 55% chance of sunshine that reflects a notable dip compared to the sunnier months earlier in the year. As we look back at the data, it's clear that December's likelihood of sun is on the lower end of the spectrum, especially when contrasted with the 90% chance of sun in May and 76% in April. Interestingly, the months leading up to December maintain a relatively high percentage of sunshine, creating an inviting atmosphere for early winter festivities. This trend indicates that while December may not be the sunniest month, it still offers a fair share of bright days, appealing to those seeking a milder alternative to colder climates.
In Phoenix, United States, the rhythm of daylight unfolds with a clear seasonal pattern. December marks the shortest month for sunlight, offering a modest 9 hours of daylight, a departure from the longer days of summer. As we transition through the year, daylight gradually increases from 10 hours in January and February, peaking at a generous 14 hours during the vibrancy of June and July. As autumn sets in, a gradual tapering occurs, bringing daylight back down to 10 hours by November. This cyclical dance of light not only shapes daily activities but also enriches the natural beauty of the desert landscape throughout the year.
As the year draws to a close in Phoenix, December's wind speed takes a gentle dip to an average of 1.9 m/s (4 mph). This marks a noticeable trend of diminishing winds as winter sets in, following a peak in the spring months when winds strengthened slightly to about 2.8 m/s (6 mph). Throughout the year, the winds ebb and flow, with the briskest periods occurring in March and April. The tail end of the year, especially in the cooler months, ushers in softer breezes that create a serene atmosphere, inviting residents to enjoy the calm winter evenings. With the wind speeds consistently remaining low, it's a perfect time for outdoor activities without the disruption of strong gusts.
The weather in Phoenix changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of December's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Phoenix and find detailed weather information for every month.
In December, the weather features a mild range of temperatures with a minimum of 0°C (32°F) and an average of 13°C (55°F), reaching up to a maximum of 28°C (83°F). Humidity levels are relatively high at 82%, and the month experiences 23 mm (0.9 in) of precipitation over about four days. In contrast, January sees slightly cooler conditions, with a minimum temperature of -1°C (30°F) and an average of 12°C (54°F), peaking at 29°C (84°F). Precipitation increases slightly to 25 mm (1.0 in) over the same four days, but humidity drops to 76%. For a detailed look at January weather, you can visit Phoenix weather in January.
December and February exhibit relatively mild weather, with February slightly warmer than December. In December, temperatures range from a minimum of 0°C (32°F) to a maximum of 28°C (83°F), with an average of 13°C (55°F) and 23 mm (0.9 in) of precipitation over 4 days, leading to a humidity level of 82%. By contrast, February sees a minimum temperature of 1°C (33°F) and a maximum of 29°C (84°F), with an average of 14°C (57°F). Precipitation increases to 37 mm (1.4 in), but falls over just 3 days, resulting in a slightly lower humidity of 79%. Overall, both months offer pleasant weather, but February edges out December with warmer temperatures. For more detailed insights, you can check Phoenix weather in February.
December weather tends to be cooler, with temperatures ranging from a minimum of 0°C (32°F) to a maximum of 28°C (83°F), while March experiences milder conditions, with temperatures starting at a minimum of 4°C (39°F) and peaking at 35°C (95°F). Despite December having slightly lower precipitation at 23 mm (0.9 in) across four days, March sees a bit more rainfall at 29 mm (1.2 in) but over just three days. Additionally, the humidity levels in December are higher at 82%, compared to March’s 67%, making the early spring month feel more comfortable overall. For a deeper look at the weather specifics during March, visit Phoenix weather in March.
December weather features a wide temperature range, with minimums dropping to 0°C (32°F) and averages around 13°C (55°F), while maximum temperatures can reach up to 28°C (83°F). The month sees about 23 mm (0.9 in) of precipitation over four days and high humidity levels at 82%. In contrast, April experiences milder conditions, with a minimum temperature of 8°C (47°F) and an average of 24°C (75°F), peaking at a scorching 39°C (103°F). Notably, April has significantly less precipitation, with only 1 mm (0.1 in) expected over the entire month and just 0 days of rain, along with a decrease in humidity to 55%. For a detailed overview of what to expect, visit Phoenix weather in April.
December and May present strikingly different weather conditions. In December, temperatures range from a chilly minimum of 0°C (32°F) to a pleasant maximum of 28°C (83°F), with an average of 13°C (55°F). The month experiences about 23 mm (0.9 in) of precipitation over four days, accompanied by relatively high humidity at 82%. In sharp contrast, May features much warmer temperatures, with a minimum of 13°C (55°F) and a scorching maximum that can reach 43°C (109°F), averaging around 28°C (82°F). Additionally, May sees significantly less precipitation, only about 2 mm (0.1 in) across no rainy days and lower humidity at 40%. For a more detailed look at the weather during this month, you can check Phoenix weather in May.
December and June present starkly contrasting weather conditions. December experiences milder temperatures with a range from a chilly 0°C (32°F) to a warm 28°C (83°F), while June can be sweltering, with minimums of 19°C (66°F) and scorching highs reaching 48°C (119°F). Precipitation is more frequent in December, averaging 23 mm over four days, whereas June is exceptionally dry, receiving only 2 mm with no rainy days at all. Humidity levels also differ significantly, with December averaging 82% compared to a much lower 33% in June. For more insights on the heat of June, check out Phoenix weather in June.
When comparing December and July weather, the differences are striking. In December, temperatures range from a low of 0°C (32°F) to a high of 28°C (83°F), with an average temperature of 13°C (55°F). The month sees about 23 mm (0.9 in) of precipitation over approximately four days, and humidity levels are relatively high at 82%. In contrast, July experiences much hotter conditions, with minimum temperatures starting at 23°C (74°F) and soaring up to a scorching high of 47°C (118°F), averaging around 35°C (95°F). Precipitation increases to 37 mm (1.4 in) over six days, but the humidity drops significantly to 34%. For further insights into the intense heat of July, check out Phoenix weather in July.
December and August present stark contrasts in weather. In December, temperatures range from a chilly 0°C (32°F) at night to a pleasant 28°C (83°F) during the day, with an average temperature of 13°C (55°F). The month sees about 23 mm (0.9 in) of precipitation over four days, alongside a high humidity level of 82%. In contrast, August is characterized by soaring temperatures, with minimums of 22°C (73°F) and maximums reaching a sweltering 47°C (116°F), averaging around 35°C (95°F). Precipitation increases slightly to 39 mm (1.5 in) over five days, but humidity drops to a more comfortable 48%. For a deeper dive into the specifics, you can check Phoenix weather in August.
In comparing the weather of December and September, we observe notable differences in temperature and humidity levels. December experiences cooler temperatures, with a minimum of 0°C (32°F) and an average of 13°C (55°F), while September boasts much warmer temperatures, featuring a minimum of 13°C (56°F) and an average high of 32°C (89°F) rising to maximums of 45°C (113°F). Precipitation levels are somewhat similar, with December receiving 23 mm (0.9 in) over four days and September slightly higher at 27 mm (1.1 in) over just three days. Additionally, December has a higher humidity level at 82%, compared to September's more comfortable 64%. For more detailed insight, you can check Phoenix weather in September.
In comparing the weather between December and October, notable differences emerge. December experiences a cooler temperature range, with minimums at 0°C (32°F) and daily averages around 13°C (55°F), contrasting sharply with October's much warmer lows of 7°C (45°F) and an average high of 24°C (76°F). October also boasts a significantly higher maximum temperature, reaching up to 41°C (105°F), compared to December's maximum of 28°C (83°F). Precipitation levels don't vary drastically, with December receiving 23 mm over 4 days and October seeing slightly more at 26 mm over just 2 days. Humidity levels are higher in December at 82%, while October has a more comfortable humidity level of 67%. For more detailed information, you can check Phoenix weather in October.
In comparing the weather between December and November, December tends to be cooler with temperatures ranging from a minimum of 0°C (32°F) to a maximum of 28°C (83°F), while November experiences warmer temperatures, with a minimum of 5°C (41°F) and a maximum reaching 36°C (97°F). Precipitation levels are relatively similar, with December receiving 23 mm (0.9 in) over 4 days compared to November's 21 mm (0.8 in) over just 1 day, indicating that December is wetter. Additionally, December has a higher average humidity at 82% compared to November's 77%. For more detailed information, visit Phoenix weather in November.
As December rolls into Phoenix, the weather takes a refreshing turn with cooler temperatures and a hint of winter's chill, contrasting sharply with the desert's typical heat. While daytime highs can reach a pleasant 28°C (83°F), the nights dip to a brisk 0°C (32°F), making it a month of notable temperature variation. Additionally, December sees increased humidity at 82%, leading to a feeling of crispness in the air, along with light precipitation that often graces the city for about four days. This delightful shift invites both residents and visitors to explore the outdoor beauty of the city without the overwhelming heat of other months. To learn more about the overall weather patterns, visit Phoenix Climate.