Last updated: February 24, 2025
May in the Grand Canyon offers a delightful blend of comfortable temperatures and stunning vistas. With maximum daytime highs reaching 34°C (93°F) and an average temperature of 17°C (64°F), the weather is perfect for outdoor adventures. However, nights can be cooler, dipping to a brisk 1°C (34°F). Visitors should prepare for occasional rain, as the month sees about 18 mm (0.7 in) of precipitation spread over 3 days, complemented by a moderate humidity level of 46%. Whether hiking or simply enjoying the breathtaking scenery, May is an excellent time to experience the splendor of this iconic landscape.
As May sets in at the Grand Canyon, temperatures begin to warm up significantly, marking a delightful transition into spring. The minimum temperature climbs to a mild 1°C (34°F), while the average temperature reaches a comfortable 17°C (64°F), making it an ideal time for exploring the canyon's breathtaking vistas. The maximum temperature can soar to 34°C (93°F), reflecting the shift towards summer. Compared to the preceding months, May not only brings a substantial increase in warmth but also offers more pleasant conditions for outdoor activities. With the landscape in full bloom and the weather inviting, it's no wonder that many visitors flock to witness this natural wonder during this vibrant month.
In May, the Grand Canyon experiences a modest precipitation total of 18 mm (0.7 in), marking a slight uptick from the meager rains of April. With rainfall occurring on just three days, the weather remains relatively dry, allowing visitors to enjoy the stunning vistas without interruption. This pattern of mild precipitation, common as spring transitions into summer, follows the trend of increasingly scarce rains in June, where only 3 mm (0.1 in) is recorded. The precipitation cycle hints at the region's characteristic fluctuations, with May acting as a bridge between the wetter spring months and the drier summer period ahead.
As spring warms the breathtaking landscapes of the Grand Canyon, May marks a significant drop in humidity, reaching 46%, the lowest level so far in the year. This decline follows a gradual decrease from April's 63%, signaling a transition towards the drier summer months ahead. Notably, the humidity steadily decreases through June and July, where it reaches a mere 33%. This trend highlights the shift from the more moisture-laden winter and early spring months, where humidity peaks at 80% in January and 83% in February. Visitors in May can expect a more comfortable and refreshing experience, as the canyon's stunning vistas become accessible in a crisp, inviting atmosphere—perfect for exploration and adventure.
As temperatures rise in May, the UV Index in the Grand Canyon reaches a striking 12, marking it as an extreme exposure category with a quick burn time of just 10 minutes. Following a trend initiated in the previous month, this peak UV level suggests that outdoor enthusiasts should exercise heightened caution during their sunlit adventures. From January's moderate 4 to April's extreme 11, the steady increase showcases the region's intensifying solar intensity as summer approaches. As visitors explore the magnificent landscapes, it's crucial to stay informed and protect oneself against the sun's powerful rays. For more details, refer to the Grand Canyon UV Index.
UV Risk Categories
As spring unfolds, May shines brightly in the Grand Canyon, boasting an impressive 373 hours of sunshine. This is a significant increase from the 330 hours recorded in April, reflecting the region's transition into warmer months. The trend of rising sunshine hours continues through June, peaking at 379 hours, before gently tapering off in the heart of summer. Comparatively, this vibrant May sunshine outshines the earlier months, such as 181 hours in January and 235 hours in February, emphasizing the canyon's transformation as it welcomes visitors eager to explore its breathtaking vistas under a brilliant sky. The steady increase in daylight hours creates a perfect canvas for adventure, making May an ideal time for those looking to immerse themselves in the stunning landscape of the Grand Canyon.
As May approaches in the Grand Canyon, the likelihood of sunny weather significantly increases, reaching an impressive 79% chance of sunshine. This trend is a delightful continuation from April's 74%, showcasing a steady climb as spring unfolds. In contrast, the preceding months exhibit more variability, with January's 53% and March’s 64% highlighting a journey from winter's retreat to the embrace of sunnier skies. Following May, sunshine remains prevalent through the summer months, though a dip occurs in July, dropping to 43%. Overall, May stands out as one of the best months for basking in the sun at the Grand Canyon, marking a high point in the sunny weather trend leading into summer.
As spring unfolds and ushers in the vibrant warmth of May, daylight duration in the Grand Canyon reaches its peak at 14 hours. This increase from 10 hours in January showcases a steady progression toward longer days, with daylight gaining an hour each in March and April. Following May, the sunlight remains generous through June and July, retaining that same 14-hour stretch before gradually tapering off again. The summer warmth is mirrored in the abundance of daylight, highlighting a key trend in the region: longer days thriving during the spring and summer, which then recede as autumn approaches, shaping the stunning landscapes and outdoor experiences in this iconic locale.
In the breathtaking expanse of the Grand Canyon, May marks a transition in wind patterns that echoes the vibrancy of spring. With an average wind speed holding steady at 3.3 m/s (7 mph), May shares this briskness with April, setting the stage for pleasant outdoor adventures. As the months progress into summer, a slight decrease in wind speeds is observed, dropping to 2.9 m/s (6 mph) in June, then further falling off to 2.1 m/s (5 mph) in the peak of July. This subtle ebb and flow of winds not only enhances the canyon's captivating vistas but also creates an inviting atmosphere for hikers and nature enthusiasts eager to explore its wonders as warmer days approach.
The weather in Grand Canyon changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of May's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Grand Canyon and find detailed weather information for every month.
May and January exhibit strikingly different weather patterns. In May, temperatures range from a chilly 1°C (34°F) at night to a warm 34°C (93°F) during the day, with an average temperature of 17°C (64°F) and relatively low humidity at 46%. Precipitation is minimal, totaling just 18 mm (0.7 in) over about 3 days. In contrast, January is marked by much colder conditions, with temperatures dipping as low as -17°C (2°F) and averaging only 2°C (36°F). Although daytime highs reach a milder 17°C (63°F), the humidity is significantly higher at 80%. Additionally, January experiences more frequent precipitation, totaling 40 mm (1.6 in) over approximately 6 days. For those interested in learning more about the climate during this season, check out Grand Canyon weather in January.
In comparing the weather of May and February, May offers a much warmer experience, with average temperatures ranging from a chilly 1°C (34°F) at night to a sultry high of 34°C (93°F) during the day. In contrast, February can be quite cold, with minimum temperatures plunging to -16°C (4°F), and only reaching a maximum of 19°C (66°F) on average. While May experiences low precipitation with only 18 mm (0.7 in) over just three days, February is significantly wetter, boasting 43 mm (1.7 in) across seven days. Moreover, February has a much higher humidity level at 83%, compared to May's 46%. For a deeper dive into February weather specifics, check out Grand Canyon weather in February.
May weather is generally warmer and drier compared to March. With temperatures ranging from a minimum of 1°C (34°F) to a maximum of 34°C (93°F), May boasts a comfortable average of 17°C (64°F) and only experiences about 18 mm (0.7 in) of precipitation over three days. In contrast, March presents a chillier climate, showcasing a wider swing in temperatures with lows of -14°C (7°F) and highs of 25°C (78°F), averaging just 7°C (45°F). Additionally, March is marked by substantially higher precipitation, totaling 48 mm (1.9 in) over eight days, accompanied by increased humidity at 72%. For more details about March conditions, you can refer to Grand Canyon weather in March.
May weather showcases a noticeable warming trend compared to April, with average temperatures rising from 13°C (56°F) in April to 17°C (64°F) in May. The minimum temperatures also increase, moving from a chilly -3°C (27°F) in April to a milder 1°C (34°F) in May, while the maximum temperatures peak at 34°C (93°F) in May, compared to 30°C (87°F) in April. Additionally, May experiences slightly more precipitation at 18 mm (0.7 in) over three days, compared to April's 13 mm (0.5 in) over just two days, although the humidity level decreases from 63% in April to 46% in May. For those interested, you can find more details about the weather during this time at Grand Canyon weather in April.
May and June weather show a notable transition as temperatures rise and conditions become drier. In May, temperatures range from a minimum of 1°C (34°F) to a maximum of 34°C (93°F), with an average of 17°C (64°F). Precipitation is relatively mild at 18 mm (0.7 in) over three days, resulting in a humidity level of 46%. In contrast, June experiences warmer temperatures with a minimum of 7°C (45°F) and a maximum of 38°C (102°F), averaging 24°C (76°F). Precipitation drops significantly to just 3 mm (0.1 in) and occurs over no days, leading to lower humidity at 35%. For more details on June weather, check out Grand Canyon weather in June.
In comparing the weather between May and July, it’s clear that July brings a significant increase in temperatures, with average highs reaching around 26°C (80°F) compared to May's average of 17°C (64°F). While May experiences milder conditions with a minimum of 1°C (34°F), July's minimum is notably warmer at 13°C (56°F). Additionally, July tends to be more humid with a humidity level of 33%, whereas May has a slightly higher humidity at 46%. Rainfall is more frequent in July, with precipitation occurring on 7 days and totaling 24 mm (1.0 in), compared to May's 3 days of rain and 18 mm (0.7 in). For a detailed look at July conditions, you can explore Grand Canyon weather in July.
Comparing the weather in May and August reveals some notable differences. In May, temperatures range from a chilly 1°C (34°F) at the minimum to a warm 34°C (93°F) at the maximum, with an average of 17°C (64°F). The month experiences light precipitation totaling 18 mm (0.7 in) over about three days, and humidity levels sit at 46%. In contrast, August features a much milder minimum temperature of 13°C (56°F) and higher average temperatures peaking at 38°C (100°F) with an average of 26°C (79°F). While August sees slightly less precipitation at 15 mm (0.6 in) over the same three days, it also has a lower humidity of 41%. For more specifics about the warm, dry weather during this month, check out Grand Canyon weather in August.
May and September exhibit distinct weather characteristics that reflect the transition between spring and autumn. In May, temperatures range from a minimum of 1°C (34°F) to an average of 17°C (64°F), peaking at 34°C (93°F). The month sees relatively low precipitation, averaging 18 mm (0.7 in) over three days, with a humidity of 46%. By contrast, September experiences slightly warmer conditions, with temperatures starting at a minimum of 3°C (37°F) and averaging 22°C (71°F), while reaching a high of 37°C (100°F). Precipitation decreases to 14 mm (0.5 in) over the same three days, but humidity rises to 59%, suggesting a more muggy climate towards the end of summer. For more specific insights about weather conditions in September, you can visit Grand Canyon weather in September.
In May, temperatures can range from a chilly 1°C (34°F) to a warm 34°C (93°F), with an average of around 17°C (64°F). Precipitation is relatively low, with only 18 mm (0.7 in) expected over about 3 days, and humidity sits at a comfortable 46%. In contrast, October brings cooler temperatures that can dip as low as -6°C (22°F) at night, with an average temperature of 14°C (57°F) and a high of 30°C (86°F). Rainfall increases slightly to 23 mm (0.9 in) over about 4 days, and humidity rises significantly to 70%. For a detailed look at October weather, you can refer to the link: Grand Canyon weather in October.
May and November present contrasting weather experiences. In May, temperatures range from a cool 1°C (34°F) at night to a warm 34°C (93°F) during the day, with an average around 17°C (64°F). The month sees relatively low precipitation at 18 mm (0.7 in) over about three days, accompanied by a humidity level of 46%. In stark contrast, November features much colder temperatures, with nighttime lows dropping to -8°C (17°F) and daytime highs reaching up to 23°C (74°F), averaging only 8°C (47°F). Precipitation slightly increases to 19 mm (0.8 in) but occurs on just two days, while humidity rises significantly to 79%. For more details on the November conditions, you can check out Grand Canyon weather in November.
May and December showcase strikingly different weather patterns. In May, temperatures range from a minimum of 1°C (34°F) to a maximum of 34°C (93°F), with an average of 17°C (64°F), and relatively low humidity at 46%. The month sees limited precipitation, with just 18 mm (0.7 in) spread over about three days. In contrast, December's weather is much colder, featuring a minimum temperature of -16°C (4°F) and an average of 3°C (37°F), with highs reaching 18°C (64°F). December also experiences increased precipitation at 33 mm (1.3 in) over six days and significantly higher humidity at 82%. For a detailed look at what to expect, check out the Grand Canyon weather in December.
As May unfolds at the Grand Canyon, visitors can expect a delightful transition into warmer weather. The average temperatures rise, providing a pleasant backdrop for exploration, while the maximum highs can reach balmy peaks. Unlike the cooler months, May offers a refreshing escape from the chill, although nighttime can still bring a crispness that reminds us of winter's lingering touch. With only a few days of light precipitation and moderate humidity, it’s an ideal time for both adventurous hikes and peaceful explorations. May stands out as a month where nature begins to bloom, inviting outdoor enthusiasts to bask in its serene beauty. For more insights into seasonal changes and weather patterns, check out Grand Canyon Climate.