May Weather in Yosemite Valley, United States

Last updated: February 24, 2025

In Yosemite Valley during May, visitors can expect a delightful blend of temperatures, with a maximum reaching 24°C (75°F) and an average of 6°C (43°F), while nighttime can dip to a chilly minimum of -13°C (9°F). This month typically experiences 68 mm (2.7 in) of precipitation across 11 days, enhancing the valley's lush scenery and vibrant waterfalls. With a comfortable humidity level of 58%, May presents an ideal time for outdoor enthusiasts to explore the breathtaking landscapes of Yosemite, balancing warmth with refreshing spring showers.

May Temperature in Yosemite Valley

In May, Yosemite Valley begins to shake off the lingering chill of winter, ushering in warmer days and cooler nights. With minimum temperatures around -13°C (9°F) and a pleasant average of 6°C (43°F), the valley welcomes a notable rise in warmth compared to the earlier months. Daytime highs can reach a delightful 24°C (75°F), making it an ideal time for outdoor adventures amidst stunning spring blooms. As the snow melts and waterfalls swell, visitors can enjoy scenic hikes and breathtaking views, perfectly complemented by the enchanting temperatures that balance the remnants of winter with the promise of summer.

May Weather in Yosemite Valley: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Yosemite Valley, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec272729364255636255443627
Data source: Temperature data for Yosemite Valley generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

May Precipitation in Yosemite Valley

May marks a distinct transition in Yosemite Valley's precipitation patterns, with 68 mm (2.7 in) of rainfall recorded over 11 days. This is a notable decrease from the heavier rains seen in earlier months, particularly January and February, which both exceeded 225 mm (8.9 in). As spring approaches, the valley begins to dry out, indicated by the drop from 102 mm (4.0 in) in April to nearly half that amount in May. This trend of diminishing precipitation continues into June, where only 20 mm (0.8 in) fall over just 5 days. The gradual shift from the wetter winter months to drier summer conditions highlights the evolving climate of the region, setting the stage for the vibrant greenery and stunning landscapes that define Yosemite in late spring.

May Precipitation Trends in Yosemite Valley

The chart displays monthly precipitation patterns in Yosemite Valley, with values for each month alongside May's data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May's conditions compare to those of other months.
JanFebMarAprMayJunJulAugSepOctNovDec22722620910268202417174398160
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Yosemite Valley

As spring unfolds in Yosemite Valley, May brings a refreshing change in humidity levels, dropping to 58%. This represents a significant decrease from the 72% recorded in April, indicating the transition into a drier climate as summer approaches. The trend of decreasing humidity continues into June and July, where it reaches a low of 49% and then plummets to 36%, setting the stage for sunny, comfortable days. The variation in moisture levels highlights the valley's shift from the wetness of the winter months, where humidity peaks at 85% in February, to the drier summer months that are perfect for outdoor adventures and exploration. As May unfolds, visitors can enjoy the vibrant beauty of blooming wildflowers against a backdrop of pleasantly low humidity, making it an ideal time to experience the breathtaking landscapes of Yosemite.

May Average Humidity in Yosemite Valley

This chart illustrates the average monthly humidity levels in Yosemite Valley, with May's data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, allowing you to see how May's humidity levels compare to other months.
JanFebMarAprMayJunJulAugSepOctNovDec82%85%80%72%58%49%36%30%42%59%78%79%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Yosemite Valley

In May, Yosemite Valley experiences a striking UV Index of 12, categorizing it as extreme and signaling a significant risk of harm from unprotected sun exposure. This trend of rising UV levels reaches its peak during this month, mirroring the patterns seen in April when the index was also at an alarming 11. As summer approaches, the sun's intensity only grows, with similar extreme levels persisting into June and July. Notably, while earlier months like January and February display a moderate to high UV index, the rapid ascent in numbers underscores the importance of sun safety measures, particularly as burn times shrink to just 10 minutes in May. For those planning outdoor adventures, staying informed about the UV Index is crucial for a safe and enjoyable experience in this breathtaking national park. For more information, check out the detailed Yosemite Valley UV Index.

Maximum UV Index Levels in Yosemite Valley for May

The chart shows the monthly maximum UV Index (UVI) for Yosemite Valley in May, 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.
JanFebMarAprMayJunJulAugSepOctNovDec469111212121110754
Data source: Yosemite Valley May 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.

May Sunshine in Yosemite Valley

In May, Yosemite Valley basks in an impressive 366 hours of sunshine, marking it as a radiant peak in the seasonal progression. As spring unfolds, the valley transitions from the 170 hours of January to a remarkable 318 hours by April, showcasing a steady climb towards the abundant sunlight of late spring. Following May, though the days remain bright, there is a slight dip in sunshine hours during the summer months of June and July, which still offer an ample 388 and 392 hours respectively, before slowly receding into the more moderate light of fall. This trend underscores Yosemite's vibrant atmosphere as it shifts from winter tranquility to the full embrace of nature's splendor, inviting visitors to explore its breathtaking landscapes under the warmth of the sun.

Monthly Sunshine Duration in Yosemite Valley: May Highlighted

The May sunshine duration represents the total number of hours Yosemite Valley experiences direct sunlight during the month of May, excluding cloudy or obstructed periods. This chart compares the sunshine duration of May with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec170h224h273h318h366h388h392h364h323h293h241h210h
Data source: Yosemite Valley May Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Yosemite Valley During May

As May approaches in Yosemite Valley, the likelihood of sunny weather dramatically increases, reaching an impressive 80% chance of sunshine. This trend showcases a significant jump from the earlier months, where January and February see much lower probabilities at 44% and 58%, respectively. April begins a steady ascent with 69%, heralding the arrival of sunnier days. With the onset of summer in June and July, the sun shines even brighter, but May stands out as a delightful prelude to the summer months, making it an ideal time for outdoor adventures amidst Yosemite's breathtaking landscapes.

Percentage of Sunny Days in May in Yosemite Valley

The chart illustrates the percentage of sunny days in Yosemite Valley throughout the year, with May highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Yosemite Valley experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec44%58%55%69%81%81%73%92%89%62%65%40%
Data source: Yosemite Valley May chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Yosemite Valley in May

As spring unfolds in Yosemite Valley, the daylight duration begins to climb, reaching 14 hours by May, a significant increase from the 13 hours of April. This surge marks the transition into summer, where daylight remains abundant, allowing visitors to fully embrace the stunning landscapes and outdoor activities. Following May, the daylight holds steady through July, before gradually tapering off to 13 hours in August, and continuing a slow decline through the fall months. This cyclical pattern not only enhances the majestic beauty of Yosemite but also plays a crucial role in the park’s vibrant ecosystem, creating a captivating experience for all who visit during these radiant spring and summer months.

Average Daylight Hours in Yosemite Valley for May

The chart illustrates the variation in daylight duration in Yosemite Valley throughout the year, with May highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 52m10h 48m11h 59m13h 12m14h 13m14h 43m14h 26m13h 32m12h 22m11h 9m10h 6m9h 34m
Data source: Yosemite Valley daylight hours, calculated by summing the hours between sunrise and sunset for each day.

May Winds in Yosemite Valley

In Yosemite Valley, May typically showcases a gentle average wind speed of 2.0 m/s (4 mph), mirroring the slightly calmer breezes of April. This transitional period signifies a shift in the rhythm of the valley, as the winds begin to pick up momentum leading into the summer months. Notably, the wind speeds in May are consistent with those found in surrounding months, particularly dipping slightly from the springtime peaks yet maintaining a refreshing quality that complements the vibrant natural scenery. As June approaches, the winds are expected to again rise to 2.1 m/s, heralding the warmer days ahead, but for now, May offers a tranquil blend of mild air and the awakening beauty of Yosemite in spring.

Average May Wind Speed in Yosemite Valley

The chart displays monthly wind speed patterns in Yosemite Valley, with values for each month shown alongside May's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how May's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec2.12.12.12.02.0 m/s2.11.82.02.02.01.82.2
Data source: Yosemite Valley May wind data, generated using information from the Copernicus Climate Change Service.

How May Weather in Yosemite Valley Compares to Other Months

The weather in Yosemite Valley 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 Yosemite Valley and find detailed weather information for every month.

When comparing the weather in May and January, one can observe noticeable differences in temperature, precipitation, and humidity. In May, temperatures range from a chilly -13°C (9°F) at their lowest to a pleasant 24°C (75°F) at the high end, with an average of 6°C (43°F). Precipitation is moderate at 68 mm (2.7 in) over 11 days, and humidity stands at 58%. In contrast, January features colder conditions, with temperatures dipping as low as -18°C (0°F) and peaking at 11°C (51°F), averaging -3°C (27°F). This month is also much wetter, receiving 227 mm (9.0 in) of precipitation over just 9 days and exhibiting higher humidity at 82%. For more details on January's weather patterns, you can check Yosemite Valley weather in January.

When comparing the weather in May and February, notable differences emerge. May generally shows a more moderate climate, with temperatures ranging from a chilly -13°C (9°F) to a warm 24°C (75°F) and an average of 6°C (43°F). Conversely, February experiences much colder temperatures, with a minimum of -21°C (-5°F) and a maximum of only 13°C (56°F), averaging around -3°C (27°F). Precipitation is also significantly higher in February, reaching 226 mm (8.9 in) compared to May's 68 mm (2.7 in), despite both months having 11 days of precipitation. Additionally, February is characterized by higher humidity levels at 85%, while May maintains a lower humidity of 58%. For more detailed insights into February weather, you can check Yosemite Valley weather in February.

When comparing the weather in May and March, it’s evident that May is generally much milder. May sees temperatures ranging from a minimum of -13°C (9°F) to a maximum of 24°C (75°F), with an average of 6°C (43°F), while March experiences colder conditions with temperatures ranging from -17°C (1°F) to a maximum of 13°C (56°F) and an average of -2°C (29°F). Additionally, March tends to be wetter, receiving 209 mm (8.2 in) of precipitation over 13 days, compared to May's 68 mm (2.7 in) of precipitation over 11 days. Humidity also plays a role, as March has a higher humidity level at 80%, compared to May's 58%. For a more detailed look at the weather specifics, check out Yosemite Valley weather in March.

When comparing the weather in April and May, it's clear that May brings a noticeable warming trend. The average temperature rises from April's 2°C (36°F) to 6°C (43°F), while the maximum temperature reaches a pleasant 24°C (75°F) compared to April's peak of 16°C (60°F). Additionally, May experiences less precipitation, totaling 68 mm (2.7 in) over 11 days, in contrast to April's 102 mm (4.0 in) across 8 days. However, April's higher humidity at 72% makes it feel more damp compared to May's 58%. For those interested in detailed insights about April weather, you can visit Yosemite Valley weather in April.

May and June show a distinct transition in weather conditions. In May, temperatures can range from a chilly -13°C (9°F) at night to a warm 24°C (75°F) during the day, with an average of 6°C (43°F). The month tends to be wetter, receiving 68 mm (2.7 in) of precipitation over 11 days, and has a humidity level of 58%. In contrast, June brings milder temperatures, with nighttime lows of -5°C (24°F) and daytime highs reaching 27°C (81°F), averaging 13°C (55°F). The month experiences significantly less precipitation, only 20 mm (0.8 in) over just 5 days, and a decrease in humidity to 49%. For more detailed insights, check out Yosemite Valley weather in June.

In comparing the weather of May and July, significant differences emerge. May sees a broad range of temperatures, with a minimum of -13°C (9°F) and a maximum of 24°C (75°F), resulting in an average temperature of 6°C (43°F). The month experiences more precipitation, with 68 mm (2.7 in) falling over 11 days, accompanied by a humidity level of 58%. In contrast, July enjoys milder weather, with minimum temperatures of 3°C (37°F) and a maximum of 29°C (85°F), leading to a higher average of 17°C (63°F). Precipitation dramatically decreases to just 24 mm (0.9 in) over 6 days, and humidity drops to a comfortable 36%. For those planning a visit, Yosemite Valley weather in July provides a glimpse of the summer conditions.

When comparing the weather in May and August, notable differences emerge in temperature and precipitation. May experiences a broader temperature range, with minimums dipping as low as -13°C (9°F) and maximums reaching up to 24°C (75°F), leading to a chilly average of 6°C (43°F). In contrast, August offers a much warmer climate, with minimum temperatures around 4°C (39°F) and maximums climbing to 29°C (84°F), resulting in a pleasant average of 16°C (62°F). Additionally, May is marked by higher humidity at 58% and more precipitation, totaling 68 mm (2.7 in) over 11 days, whereas August sees significantly less rainfall, only 17 mm (0.7 in) over 5 days, and a lower humidity of 30%. For those curious about specific conditions during this warmer month, visit Yosemite Valley weather in August.

In comparing the weather between May and September, we see notable differences in temperature and precipitation patterns. May experiences a broader temperature range, with a minimum of -13°C (9°F) and an average of 6°C (43°F), while the maximum reaches 24°C (75°F). This month also sees more rainfall, with 68 mm (2.7 in) of precipitation over 11 days and a humidity level of 58%. In contrast, September offers milder weather, with minimum temperatures of -8°C (18°F), an average of 13°C (55°F), and a maximum of 28°C (83°F). Furthermore, precipitation is significantly lower in September, totaling only 17 mm (0.7 in) over just 4 days, accompanied by a lower humidity level of 42%. For more information on September weather specifics, you can visit Yosemite Valley weather in September.

May and October present similar temperature ranges, with both months experiencing maximums of 24°C (75°F). However, May tends to be cooler on average, with temperatures ranging from a minimum of -13°C (9°F) to an average of 6°C (43°F), while October has a slightly warmer average of 7°C (44°F) and a minimum of -10°C (15°F). In terms of precipitation, May is wetter, receiving 68 mm (2.7 in) over 11 days, compared to October's 43 mm (1.7 in) falling over just 3 days. Humidity levels are quite similar, with May at 58% and October slightly higher at 59%. For a detailed look at what to expect in October, check out Yosemite Valley weather in October.

May and November present contrasting weather patterns. In May, temperatures range from a chilly minimum of -13°C (9°F) to a pleasant maximum of 24°C (75°F), with an average of 6°C (43°F). The month experiences moderate precipitation at 68 mm (2.7 in) over 11 days, and humidity levels are relatively mild at 58%. In contrast, November sees lower temperatures, with a minimum of -20°C (-4°F) and a maximum of 18°C (65°F), averaging only 2°C (36°F). This month is also wetter, with 98 mm (3.9 in) of precipitation occurring on just 6 days, and higher humidity at 78%. For more details on November weather, check out Yosemite Valley weather in November.

When comparing the weather in May and December, notable differences emerge. May generally offers milder temperatures, with an average of 6°C (43°F) and maximum highs reaching up to 24°C (75°F). In contrast, December experiences colder conditions, with an average temperature of -3°C (27°F) and a maximum of just 12°C (55°F). Precipitation levels also vary significantly; May sees about 68 mm (2.7 in) over 11 days, while December receives a much higher amount of 160 mm (6.3 in) over just 10 days, contributing to higher humidity levels of 79%. For those looking to explore this majestic region in winter, detailed information can be found at Yosemite Valley weather in December.

Compare Yosemite Valley's Climate with Cities Worldwide

Conclusion: What to Expect From May Weather in Yosemite Valley

As May unfolds in Yosemite Valley, the weather begins to shift, heralding the transition from the chill of early spring to the warmth of summer. While temperatures can reach a pleasant 24°C (75°F), nights still carry a brisk chill, reflecting the valley's diverse climate. Unlike the drier summer months, May experiences increased precipitation, with rain gracing the valley on about 11 days. This infusion of moisture not only enhances the lush scenery but also marks a stark contrast to the arid conditions that often define the ensuing summer. As humidity sits at 58%, the air feels fresh, inviting visitors to explore before the peak season chaos. For a deeper dive into the weather patterns throughout the year, check out the Yosemite Valley Climate page.