May Weather in Mount Shasta, United States

Last updated: February 24, 2025

Experience the dynamic May weather of Mount Shasta, United States, where temperatures range from a brisk -5°C (24°F) at night to a pleasant 30°C (86°F) during the day, averaging around 12°C (54°F). This month welcomes a moderate humidity level of 72%, creating a refreshing atmosphere amidst the stunning natural landscapes. Anticipate approximately 87 mm (3.4 in) of precipitation over 9 days, adding a touch of spring vitality to the region's ecosystems. Whether you're hiking, exploring, or simply enjoying the scenery, May offers a captivating blend of warm days and cool nights, perfect for any outdoor enthusiast.

May Temperature in Mount Shasta

In May, Mount Shasta begins to shake off the lingering chill of winter, showcasing a delightful transformation in temperatures. With a minimum of -5°C (24°F) and a pleasant average of 12°C (54°F), the scene sets the stage for warmer days ahead. The peaks can reach up to 30°C (86°F), inviting locals and visitors to explore the sweeping landscapes under increasingly sunny skies. This month marks a notable shift from the cold grip of April's sub-zero temperatures, reflecting a steady rise leading into summer. Consequently, May presents an ideal time for outdoor adventures, as the region bursts with life, and conditions become more favorable for hiking and enjoying the natural beauty surrounding Mount Shasta.

May Weather in Mount Shasta: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Mount Shasta, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec343538455464737162504134
Data source: Temperature data for Mount Shasta 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 Mount Shasta

In May, Mount Shasta experiences a notable shift in precipitation, recording 87 mm (3.4 in) over 9 days, marking a significant drop from the robust rainfall of earlier months. This decreasing trend from April's 121 mm (4.8 in) suggests a transition into drier conditions as the region approaches summer, typified by the dramatic decline in precipitation in June to just 27 mm (1.1 in). While May still holds on to its spring moisture, it serves as a gentle prelude to the arid summer months, highlighting the fluctuating climate patterns that characterize Mount Shasta's yearly cycle.

May Precipitation Trends in Mount Shasta

The chart displays monthly precipitation patterns in Mount Shasta, 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.
JanFebMarAprMayJunJulAugSepOctNovDec2272182041218727592376129153
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Mount Shasta

As the seasons transition in Mount Shasta, May brings a noticeable shift in humidity, which hovers around 72%. This marks a significant decline from the preceding months, where humidity levels lingered in the mid-80s and high-70s. The gradual drop initiates a trend towards drier conditions, paving the way for the summer months ahead. By June, humidity further decreases to 67%, continuing the dry-out phase that characterizes the region's summer climate. This reduction not only enhances the outdoor experience but also beautifully complements the blooming nature of late spring, making May a delightful time to appreciate the area's natural beauty.

May Average Humidity in Mount Shasta

This chart illustrates the average monthly humidity levels in Mount Shasta, 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.
JanFebMarAprMayJunJulAugSepOctNovDec86%87%86%83%72%67%56%42%46%67%86%86%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Mount Shasta

In May, Mount Shasta experiences a significant increase in UV intensity, reaching an UV Index of 11, categorized as extreme. This marks a notable shift from the previous months, where levels were moderate to very high, with burn times decreasing sharply from 30 minutes in January and February to just 10 minutes by May. As summer approaches, outdoor enthusiasts should be particularly cautious, as the risk of skin damage rises dramatically. It’s a clear reminder to take protective measures against harmful UV rays while enjoying the beautiful surroundings. For more detailed insights, visit Mount Shasta UV Index.

Maximum UV Index Levels in Mount Shasta for May

The chart shows the monthly maximum UV Index (UVI) for Mount Shasta 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.
JanFebMarAprMayJunJulAugSepOctNovDec3589111211109743
Data source: Mount Shasta 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 Mount Shasta

May shines brightly in Mount Shasta, boasting an impressive 352 hours of sunshine that heralds the arrival of summer. This month marks a significant leap from April’s 282 hours, indicating that longer, sunnier days are on the horizon. As spring unfolds, residents and visitors alike can revel in the vibrant landscapes, fueled by the sun's increasing presence. May's sunshine is a prelude to an even more radiant June, which averages 386 hours, allowing nature to flourish and outdoor activities to thrive. This upward trend in sunlight not only enhances the region's beauty but also invites a sense of adventure and rejuvenation, making Mount Shasta a captivating destination during this delightful time of year.

Monthly Sunshine Duration in Mount Shasta: May Highlighted

The May sunshine duration represents the total number of hours Mount Shasta 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.
JanFebMarAprMayJunJulAugSepOctNovDec111h183h228h282h352h386h402h356h309h274h196h160h
Data source: Mount Shasta May Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Mount Shasta During May

As May unfolds in Mount Shasta, the region enjoys a promising 69% chance of sunny weather, continuing the upward trend established in the preceding months. After a gradual increase from January's 26%, the likelihood of sunshine has steadily climbed, peaking at 70% in April before slightly tapering off in May. This seasonal progression indicates a clear shift towards more favorable weather, as residents and visitors alike can anticipate more days basked in sunlight. With June delivering an even higher 75% chance, May serves as a delightful precursor to a sun-filled summer, making it an ideal time for outdoor activities amidst the breathtaking mountain scenery.

Percentage of Sunny Days in May in Mount Shasta

The chart illustrates the percentage of sunny days in Mount Shasta 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 Mount Shasta experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec26%44%54%70%69%75%84%88%78%43%35%30%
Data source: Mount Shasta May chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Mount Shasta in May

As spring unfolds its vibrant colors in Mount Shasta, May shines particularly bright with an impressive 14 hours of daylight, embodying the peak of the season's transition. This increase follows April’s 13 hours, marking a steady climb from the shorter days of winter. The trend continues into June, where daylight reaches its annual zenith at 15 hours, inviting both locals and visitors to bask in the extended sunshine. As summer takes hold, daylight begins to taper slightly in July and August, reminding us that even in the height of warmth, the approach of autumn is inevitable. The gradual decrease in daylight hours resonates with nature's rhythm, ultimately closing the year with the shorter days of late fall and winter, creating a beautiful cycle of light and shadow throughout the year.

Average Daylight Hours in Mount Shasta for May

The chart illustrates the variation in daylight duration in Mount Shasta throughout the year, with May highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 34m10h 38m11h 58m13h 21m14h 30m15h 5m14h 45m13h 43m12h 24m11h 2m9h 50m9h 14m
Data source: Mount Shasta daylight hours, calculated by summing the hours between sunrise and sunset for each day.

May Winds in Mount Shasta

In Mount Shasta, the May winds bring a refreshing consistency, with an average wind speed of 2.4 m/s (5 mph), mirroring the increase seen in March. This month marks a transition, as the spring thaw welcomes slightly stronger breezes compared to earlier months like April, which dipped slightly to 2.1 m/s (5 mph). As summer approaches, the wind speeds begin to gradually decline, reflecting the region's unique climatic rhythm. Witnessing how the winds evolve from brisk early spring to gentler summer breezes is part of the area's magnetic charm, making May a delightful time to experience the refreshing outdoor air against the stunning backdrop of Mount Shasta.

Average May Wind Speed in Mount Shasta

The chart displays monthly wind speed patterns in Mount Shasta, 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.
JanFebMarAprMayJunJulAugSepOctNovDec2.22.32.42.12.4 m/s2.21.91.92.02.21.92.0
Data source: Mount Shasta May wind data, generated using information from the Copernicus Climate Change Service.

How May Weather in Mount Shasta Compares to Other Months

The weather in Mount Shasta 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 Mount Shasta and find detailed weather information for every month.

The weather in May and January shows a significant contrast in temperature and precipitation patterns. In May, temperatures range from a minimum of -5°C (24°F) to a pleasant average of 12°C (54°F), peaking at a warm 30°C (86°F). This month experiences a total precipitation of 87 mm (3.4 in) over 9 days, with a humidity level of 72%. In stark contrast, January sees much colder temperatures, with a minimum of -19°C (-3°F) and an average of just 1°C (35°F), reaching a maximum of 14°C (58°F). This winter month is also wetter, with 227 mm (8.9 in) of precipitation spread across 13 days and a higher humidity of 86%. For a more detailed look at January weather, visit Mount Shasta weather in January.

When comparing the weather in May and February, it becomes clear that May is generally milder and more variable. In May, temperatures range from a minimum of -5°C (24°F) to a maximum of 30°C (86°F), with an average of 12°C (54°F). In contrast, February's temperatures are much colder, ranging from a minimum of -13°C (8°F) to a maximum of 18°C (64°F), with an average of 2°C (36°F). Precipitation is higher in February, totaling 218 mm (8.6 in) over 11 days compared to May's 87 mm (3.4 in) over 9 days, resulting in a busier and wetter month. Moreover, February tends to be more humid with a humidity level of 87%, compared to May's 72%. For more specific insights, you can check Mount Shasta weather in February.

When comparing the weather in May and March, it’s clear that May offers a significantly milder climate. May experiences temperatures ranging from a low of -5°C (24°F) to a high of 30°C (86°F), with an average temperature of 12°C (54°F). In contrast, March sees much colder temperatures, with a minimum of -15°C (6°F), an average of 3°C (38°F), and a maximum of 20°C (68°F). Additionally, March is much wetter, receiving 204 mm (8.0 inches) of precipitation over 16 days, compared to May's 87 mm (3.4 inches) over just 9 days. March also has higher humidity at 86%, while May's humidity averages at 72%. For a more detailed look at the March weather specifically, you can visit Mount Shasta weather in March.

In comparing the weather of April and May, it is evident that May enjoys a more moderate range of temperatures, with averages reaching 12°C (54°F), compared to April's lower average of 7°C (45°F). The maximum temperature in May can soar to 30°C (86°F), offering warmer days ideal for outdoor activities, while April peaks at a modest 25°C (77°F). However, May also experiences slightly more precipitation, totaling 87 mm (3.4 in) over 9 days, compared to April's 121 mm (4.8 in) across 10 days. Additionally, humidity levels drop in May to 72%, making it feel less humid compared to April's higher 83%. For more detailed insights, you can check Mount Shasta weather in April.

In comparing the weather of May and June, one can observe a noticeable shift in temperatures and precipitation patterns. May experiences a broader temperature range, with minimums plunging to -5°C (24°F) and maximums reaching up to 30°C (86°F), while June shows a milder range, with minimums at 0°C (32°F) and maximums peaking at 35°C (96°F). Additionally, May has higher precipitation at 87 mm (3.4 in) over 9 days, compared to June, which sees only 27 mm (1.1 in) over just 4 days, contributing to a slightly lower humidity level in June at 67%, compared to 72% in May. For more specific insights into June weather, you can explore Mount Shasta weather in June.

In May, temperatures can vary significantly, ranging from a chilly minimum of -5°C (24°F) to a warm maximum of 30°C (86°F), with an average of 12°C (54°F). This month also sees a considerable amount of precipitation, totaling 87 mm (3.4 in) over about nine days, accompanied by a relatively high humidity level of 72%. In contrast, July presents a much warmer climate, with temperatures starting at a minimum of 8°C (47°F), averaging 23°C (73°F), and peaking at a maximum of 37°C (99°F). July is notably drier, featuring only 5 mm (0.2 in) of precipitation over just one day and a lower humidity of 56%. For more detailed insights, you can check out the Mount Shasta weather in July.

May and August offer quite contrasting weather experiences. In May, temperatures can fluctuate significantly, ranging from a chilly minimum of -5°C (24°F) to a warm maximum of 30°C (86°F), with an average of 12°C (54°F). This month also sees substantial rainfall, with 87 mm (3.4 in) of precipitation over about 9 days, contributing to a humid environment at 72% humidity. In contrast, August is typically much warmer, featuring milder minimum temperatures of 7°C (44°F) and soaring maximums up to 37°C (98°F), leading to a comfortable average of 22°C (71°F). Precipitation is minimal in August, with only 9 mm (0.4 in) across just 2 days, and the humidity drops significantly to 42%, creating a drier atmosphere. For more details, you can check Mount Shasta weather in August.

May and September exhibit notable differences in weather conditions. In May, temperatures range from a chilly -5°C (24°F) to a warm 30°C (86°F), with an average of 12°C (54°F). The month sees significant rainfall, totaling 87 mm (3.4 in) over about 9 days, and the humidity remains high at 72%. Conversely, September experiences a milder temperature range from -1°C (30°F) to a high of 36°C (96°F), with an average of 17°C (63°F). It is much drier, receiving only 23 mm (0.9 in) of precipitation over just 4 days, accompanied by a lower humidity level of 46%. For a closer look at September weather, check out Mount Shasta weather in September.

May and October both present mild temperatures, but they exhibit distinct seasonal characteristics. In May, the temperatures range from a chilly -5°C (24°F) at night to a warm 30°C (86°F) during the day, with an average temperature of 12°C (54°F). This month sees around 87 mm (3.4 in) of precipitation across 9 days, and humidity levels are relatively high at 72%. In contrast, October experiences slightly cooler temperatures ranging from -4°C (25°F) to a maximum of 31°C (87°F), with an average of 10°C (51°F). Precipitation decreases to 76 mm (3.0 in) over just 5 days, and humidity drops to 67%. For more specific insights into October’s climate, you can view Mount Shasta weather in October.

May and November showcase distinct weather characteristics. In May, temperatures range from a chilly -5°C (24°F) at night to a warm 30°C (86°F) during the day, with an average of 12°C (54°F). It's a relatively mild month with an average humidity of 72% and about 87 mm (3.4 in) of precipitation spread over nine days. In contrast, November presents colder conditions, with temperatures dipping to a minimum of -14°C (7°F) and peaking at 23°C (73°F), averaging 5°C (42°F). The month is also wetter, receiving 128 mm (5.1 in) of precipitation, alongside a higher humidity level of 86%. For more details, you can check Mount Shasta weather in November.

May and December exhibit remarkable contrasts in weather patterns. In May, temperatures range from a chilly minimum of -5°C (24°F) to a warm maximum of 30°C (86°F), with an average of 12°C (54°F). The month sees about 87 mm (3.4 in) of precipitation over nine days, coupled with a humidity level of 72%. In stark contrast, December experiences colder conditions, with temperatures dipping to a minimum of -10°C (14°F) and averaging around 1°C (34°F), peaking at 17°C (63°F). This month is wetter, accumulating 153 mm (6.0 in) of precipitation over twelve days, and exhibiting higher humidity at 86%. For a detailed understanding of what to expect, you can check Mount Shasta weather in December.

Compare Mount Shasta's Climate with Cities Worldwide

Conclusion: What to Expect From May Weather in Mount Shasta

As May unfolds, Mount Shasta transforms into a vibrant spring landscape, marked by a mix of mild temperatures and refreshing precipitation. With daytime highs approaching a warm 30°C (86°F) and an average temperature hovering around 12°C (54°F), this month feels distinctly warmer compared to the colder months preceding it. However, it’s not all sunshine; the region sees about 87 mm (3.4 in) of rainfall over 9 days, contributing to the lush greenery characteristic of late spring. This combination of warmth and moderate humidity, typically sitting at 72%, makes May a delightful precursor to summer, where the melting snow and blooming flora create a picturesque backdrop. For a deeper understanding of the unique weather patterns that shape this region, visit Mount Shasta Climate.