May Weather in New Castle, United States

Last updated: February 24, 2025

May in New Castle, United States, presents a delightful transition into warmer weather, with maximum temperatures reaching a pleasant 27°C (82°F). The average temperature settles comfortably at 13°C (55°F), while the minimum dips to a cool 2°C (37°F) during the night. Rainfall is a notable feature this month, with an average precipitation of 83 mm (3.3 in) over 11 days, contributing to the region's vibrant greenery. Coupled with a humidity level of 72%, the month creates a refreshing atmosphere ideal for outdoor activities and enjoying the unfolding beauty of spring.

May Temperature in New Castle

In New Castle, United States, May marks a significant transition into warmer weather, with temperatures steadily climbing from the chill of winter. Minimum temperatures begin at a mild 2°C (37°F), reflecting a departure from the harsh lows seen in earlier months, while the average temperature reaches a comfortable 13°C (55°F). The maximum temperature can soar up to 27°C (82°F), providing the ideal backdrop for outdoor activities. This month clearly showcases a trend of rising temperatures compared to the preceding spring months, as May emerges with a vibrant warmth that sets the tone for the approaching summer. Overall, this delightful increase in temperatures makes May one of the most pleasant months to experience in New Castle.

May Weather in New Castle: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in New Castle, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec303236465565717165554334
Data source: Temperature data for New Castle 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 New Castle

In May, New Castle experiences a moderate precipitation level of 83 mm (3.3 in) over 11 rainy days, marking a slight decrease from the heavier showers of April, which recorded 143 mm (5.6 in) across 13 days. This trend reflects the transitional nature of spring, where the region begins to dry out while still enjoying the revitalizing effects of rainfall. As May leads into the summer months, rainfall becomes more scattered but remains critical for nurturing the vibrant landscapes. Overall, the data suggests a pattern of alternating wet and dry periods, with May serving as a bridge that balances the abundant April rains and the increasingly drier June.

May Precipitation Trends in New Castle

The chart displays monthly precipitation patterns in New Castle, 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.
JanFebMarAprMayJunJulAugSepOctNovDec79989414383881237178143108133
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in New Castle

As May arrives in New Castle, humidity begins to show a noticeable decline, dropping to 72%, a level that mirrors the incoming June weather. This decrease is part of a broader trend observed as the seasons transition; January and February see peak humidity levels at 86% and 84%, respectively, gradually tapering off through the spring. By the time summer rolls in, July and August maintain an even lower humidity of 67% and 66%, creating a comfortable atmosphere. As autumn approaches, humidity climbs back, reflecting nature's cyclical rhythm, with levels rising to 78% in October and peaking again by November. This ebb and flow of moisture illustrates not only the shifts of the seasons but also the climatic character of this charming region.

May Average Humidity in New Castle

This chart illustrates the average monthly humidity levels in New Castle, 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%84%82%80%72%72%67%66%71%79%84%81%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in New Castle

As spring blossoms into summer, May brings a notable shift in the UV Index for New Castle, United States, soaring to 9, which falls into the very high exposure category. This dramatic increase from the previous months indicates a significant reduction in burn time, now just 15 minutes. Compared to January's low index of 2, it's essential for residents and visitors alike to adjust their sun safety practices accordingly. The trend reveals a gradual uptick in UV exposure as the months progress, culminating in the sunny days of June and July, which also see a UV Index of 10. Awareness of these changes is crucial for protecting skin from harmful UV rays. For more insights on UV levels and safety, visit New Castle UV Index.

Maximum UV Index Levels in New Castle for May

The chart shows the monthly maximum UV Index (UVI) for New Castle 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.
JanFebMarAprMayJunJulAugSepOctNovDec2457910997532
Data source: New Castle 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 New Castle

As May arrives in New Castle, the city basks in an impressive 295 hours of sunshine, marking a noticeable peak as spring transitions into summer. This month serves as a precursor to the sunniest stretch of the year, with June and July offering even more radiant days at 330 hours and 335 hours respectively. The sunlight trend is clearly upward during this delightful period, transitioning from the brisk 150 hours in January to an invigorating spring glow that invites outdoor activities and community gatherings. Conversely, as the year progresses, a gradual decline in sunshine begins with September recording 285 hours and continuing into fall, reaching 193 hours in November. Thus, May stands out not only as a vibrant month but as a crucial bridge to the sun-soaked days that follow.

Monthly Sunshine Duration in New Castle: May Highlighted

The May sunshine duration represents the total number of hours New Castle 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.
JanFebMarAprMayJunJulAugSepOctNovDec150h183h256h245h295h330h335h337h285h221h193h176h
Data source: New Castle May Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in New Castle During May

In New Castle, United States, the likelihood of sunny weather in May presents a moderate chance at 38%, slightly below the spring months of March and April, which boast sunnier prospects at 61% and 40%, respectively. This pattern suggests that while May retains a fair number of sunny days, it may also be influenced by the transition into summer months, where June and July see a minor dip in sunshine probability, dropping to 40% and 32%. As the year progresses, a notable increase in sunny days emerges in the fall, particularly in November, which experiences a peak at 54%. Overall, while May does not shine as brightly as some of its neighboring months, it still offers a respectable chance for enjoyable sunny weather.

Percentage of Sunny Days in May in New Castle

The chart illustrates the percentage of sunny days in New Castle 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 New Castle experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec42%35%61%40%38%40%32%32%44%38%54%32%
Data source: New Castle May chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in New Castle in May

As spring transitions into summer, New Castle, United States, experiences a remarkable increase in daylight duration. Beginning with just 9 hours in January, the days gradually lengthen through the months, culminating in a vibrant 14 hours of daylight by May. This upward trend continues into June, where residents enjoy the longest days of the year at 15 hours. However, the daylight starts to wane as summer gives way to fall, with hours gradually decreasing to 12 in September and further to 10 by October. By November and December, daylight dwindles back to just 9 hours, completing a cyclical journey through the seasons. This rhythm of light not only marks the changing seasons but also beckons outdoor activities and a celebration of warmth during the peak summer months.

Average Daylight Hours in New Castle for May

The chart illustrates the variation in daylight duration in New Castle throughout the year, with May highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 23m10h 31m11h 57m13h 26m14h 40m15h 18m14h 57m13h 51m12h 26m10h 58m9h 41m9h 2m
Data source: New Castle daylight hours, calculated by summing the hours between sunrise and sunset for each day.

May Winds in New Castle

In May, New Castle experiences a gentle breeze with an average wind speed of 4.2 m/s (9 mph). This slight decrease in wind intensity follows a somewhat variable spring, where March showcased a peak of 5.2 m/s (12 mph). The transition into May reflects a broader trend of diminishing winds as the year progresses, with the summer months of June and July further falling to 4.1 m/s (9 mph) and 3.5 m/s (8 mph) respectively. Notably, the overall pattern hints at a calming atmosphere in late spring, inviting residents and visitors alike to enjoy the onset of warmer weather without the interference of erratic winds.

Average May Wind Speed in New Castle

The chart displays monthly wind speed patterns in New Castle, 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.
JanFebMarAprMayJunJulAugSepOctNovDec4.74.75.24.44.2 m/s4.13.53.33.94.44.64.6
Data source: New Castle May wind data, generated using information from the Copernicus Climate Change Service.

How May Weather in New Castle Compares to Other Months

The weather in New Castle 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 New Castle and find detailed weather information for every month.

May and January present remarkably contrasting weather patterns. In May, temperatures range from a mild 2°C (37°F) to a pleasant 27°C (82°F), with an average of 13°C (55°F), making it a more comfortable month for outdoor activities. The precipitation is relatively moderate at 83 mm (3.3 in) over 11 days, and humidity levels sit at 72%. In stark contrast, January experiences much colder temperatures, with a minimum of -19°C (-2°F) and a maximum of only 17°C (64°F), averaging -1°C (30°F). Although January also sees a comparable amount of precipitation at 79 mm (3.1 in) spread over just 8 days, the higher humidity at 86% contributes to a much harsher, more biting cold. For further details on January weather, check New Castle weather in January.

The weather in May is significantly warmer than in February, with average temperatures rising from a cold 0°C (32°F) in February to a more pleasant 13°C (55°F) in May. February features chilly lows around -16°C (4°F), while May's temperatures rarely drop below 2°C (37°F). Precipitation is fairly consistent in both months, with February receiving slightly more at 98 mm (3.9 in) compared to May’s 83 mm (3.3 in), although both months see precipitation on about 11 days. The humidity remains high, with February at 84% and May at 72%, making February feel much colder due to the significant drop in temperatures. For an in-depth look at February weather, you can check New Castle weather in February.

In comparing the weather of May and March, it's clear that May offers a much milder climate. The average temperature in May hovers around 13°C (55°F), with highs reaching up to 27°C (82°F), while March experiences a cooler average of 2°C (36°F) and can dip to as low as -14°C (8°F). Additionally, May has 83 mm (3.3 in) of precipitation over 11 days, slightly less than March's 94 mm (3.7 in) over 10 days. Humidity levels are also a bit lower in May at 72%, compared to March's 82%. For a more detailed look at March weather, you can check out New Castle weather in March.

In comparing the weather between April and May, we see a transition towards warmer temperatures. April experiences a minimum of -2°C (29°F) and an average of 8°C (46°F), while May offers a milder minimum of 2°C (37°F) and an average of 13°C (55°F). Although May can reach higher maximums of 27°C (82°F), April's peak of 24°C (76°F) is only slightly lower. Precipitation is notably higher in April at 143 mm (5.6 in) over 13 days compared to May's 83 mm (3.3 in) over 11 days, indicating that April is typically wetter and more humid (80%) than May (72%). For a more in-depth look at April weather, check out New Castle weather in April.

In comparing the weather between May and June, it is evident that June experiences a warmer climate overall. The minimum temperature in June is 8°C (47°F), compared to May's cooler 2°C (37°F), while the average temperature rises to 18°C (65°F) from May's 13°C (55°F). Both months have similar humidity levels at 72%, but June reaches a maximum temperature of 30°C (86°F), slightly higher than May's peak of 27°C (82°F). Precipitation is relatively close, with June receiving 88 mm (3.5 in) over 10 days, just a bit more than May's 83 mm (3.3 in) across 11 days. For more specific details about June weather, you can check New Castle weather in June.

May and July present quite distinct weather patterns. In May, temperatures range from a chilly minimum of 2°C (37°F) to a warm maximum of 27°C (82°F), with an average of 13°C (55°F). The month also sees notable rainfall, totaling 83 mm (3.3 in) over 11 days and a humidity level of 72%. In contrast, July enjoys consistently warmer temperatures, with a minimum of 13°C (56°F) and a maximum of 31°C (88°F), averaging around 22°C (71°F). While July is slightly wetter, with 123 mm (4.8 in) of precipitation over 12 days, it boasts a lower humidity level of 67%. For a more detailed look at July's weather, you can visit New Castle weather in July.

May and August present quite different weather experiences. In May, temperatures range from a chilly 2°C (37°F) at night to a warm 27°C (82°F) during the day, with an average of 13°C (55°F). This month also sees higher precipitation, totaling 83 mm (3.3 in) over 11 days, accompanied by a humidity level of 72%. In contrast, August boasts milder nights with a minimum of 13°C (55°F) and daytime highs reaching 31°C (88°F), averaging around 22°C (71°F). Precipitation is slightly less in August at 71 mm (2.8 in) over 9 days, and humidity drops to 66%. For more details on August weather, check out New Castle weather in August.

May and September present distinct weather profiles, reflecting the transition from spring to autumn. In May, temperatures range from a chilly 2°C (37°F) at night to a warm 27°C (82°F) during the day, with an average of 13°C (55°F). This month experiences about 83 mm (3.3 in) of precipitation over 11 days, contributing to a relatively humid environment at 72%. Conversely, September enjoys a milder climate with minimum temperatures of 7°C (46°F) and daytime highs reaching 30°C (86°F), averaging at a comfortable 18°C (65°F). It sees slightly less precipitation at 78 mm (3.1 in) over just 8 days, while maintaining a similar humidity level of 71%. For a closer look at weather specifics, check out New Castle weather in September.

May and October both feature similar average temperatures, hovering around 13°C (55°F), but they present distinct weather patterns. In May, temperatures can reach a maximum of 27°C (82°F), offering warmer days that can contrast with cooler nights, where the minimum can drop to 2°C (37°F). The month experiences quite a bit of rain, with 83 mm (3.3 in) across 11 days. Conversely, October tends to be slightly cooler, with a maximum of 25°C (78°F) and a minimum of 1°C (34°F). However, it sees increased precipitation, averaging 142 mm (5.6 in) over the same number of wet days. Additionally, October's humidity is marginally higher at 78%, compared to May's 72%. For more detailed insights on October weather, you can check out New Castle weather in October.

May offers a mild transition into warmer weather, with temperatures ranging from a minimum of 2°C (37°F) to a comfortable average of 13°C (55°F) and peaking at a pleasant 27°C (82°F). Precipitation is moderate at 83 mm (3.3 in) over 11 days, accompanied by a humidity level of 72% that enhances the feeling of freshness.

In contrast, November marks the onset of winter, featuring much colder temperatures that drop to a minimum of -12°C (11°F) and an average of just 6°C (43°F), with highs reaching 20°C (69°F). Despite experiencing slightly more precipitation at 108 mm (4.3 in) also spread over 11 days, the humidity increases to 84%, contributing to a chillier atmosphere. For more details on what to expect, check out New Castle weather in November.

May and December present stark contrasts in weather conditions. In May, temperatures range from a mild 2°C (37°F) at night to a warm 27°C (82°F) during the day, with an average temperature of 13°C (55°F). The month experiences 83 mm (3.3 in) of rainfall spread over about 11 days, accompanied by a relative humidity of 72%. In contrast, December sees a significant drop in temperatures, with a chilling minimum of -19°C (-1°F) and an average of only 1°C (34°F), peaking at a maximum of 15°C (59°F). The precipitation increases to 133 mm (5.2 in) over 10 days, and the humidity rises slightly to 81%. For those curious about the specific weather patterns of December, you can find more details here: New Castle weather in December.

Compare New Castle's Climate with Cities Worldwide

Conclusion: What to Expect From May Weather in New Castle

May in New Castle offers a refreshing departure from the chill of earlier months, showcasing a delightful blend of warmer temperatures and heightened humidity. As spring unfolds, residents can enjoy more sunny days, though they should be prepared for occasional showers that accompany the season's transition. With an average temperature of 13°C and maximums reaching up to 27°C, May embodies the essence of spring, enticing nature lovers and outdoor enthusiasts alike. For a deeper understanding of how these weather patterns shape the local climate, explore New Castle Climate.