May Weather in Bethlehem, United States

Last updated: February 24, 2025

In Bethlehem, United States, May weather showcases a vibrant mix of conditions. With a maximum temperature soaring to 33°C (91°F) and an average of 16°C (62°F), the month hints at the approaching summer heat. However, cool nights are not uncommon, with temperatures occasionally dipping to a brisk 0°C (32°F). Rain is a recurring theme, with 139 mm (5.5 in) of precipitation spread across 13 days, contributing to a notably humid environment with levels around 75%. This blend of warmth and moisture sets the stage for lush greenery and the blossoming of nature, making May a dynamic and engaging time in Bethlehem.

May Temperature in Bethlehem

In May, Bethlehem showcases a delightful transition into warmer weather, with temperatures ranging from a chilly 0°C (32°F) at night to a balmy 33°C (91°F) during the day. The average temperature climbs to a comfortable 16°C (62°F), signaling a clear shift from the lingering cold of early spring. This month marks a notable increase in warmth compared to the preceding months, where temperatures were often mired in frost. As the days grow longer and the sun shines brighter, residents can finally relish the outdoors, with many outdoor activities becoming increasingly appealing. Overall, May serves as a vibrant prelude to the summer months, inviting everyone to embrace the blooming season.

May Weather in Bethlehem: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Bethlehem, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec323540516170767468574336
Data source: Temperature data for Bethlehem 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 Bethlehem

In May, Bethlehem experiences a notable surge in precipitation, averaging 139 mm (5.5 in) over approximately 13 days of rainfall. This marks a significant increase compared to earlier months like January and March, which see much lower totals of 72 mm (2.8 in) and 98 mm (3.9 in), respectively. The trend indicates that spring is in full swing, bringing with it robust rain. Interestingly, May's precipitation is one of the highest in the year, only closely rivaled by the summer months of August and July. As the landscape is nourished by these abundant showers, May serves as a pivotal transition into a lush and vibrant season ahead.

May Precipitation Trends in Bethlehem

The chart displays monthly precipitation patterns in Bethlehem, 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.
JanFebMarAprMayJunJulAugSepOctNovDec721089810813910212714010912391108
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Bethlehem

In May, Bethlehem experiences a noticeable shift in humidity levels, with a drop to 75% compared to the higher readings of 83% in April. This transition marks the beginning of a gradual decline in humidity as the summer months approach, creating a more comfortable atmosphere before the dry heat of June and July sets in. The overall trend throughout the year showcases the highest humidity levels during the winter months, peaking at 87% in January and November, while the summer months boast the lowest figures, reaching a refreshing 62% in August. As May unfolds, residents begin to enjoy a blend of warmth and moderate humidity, paving the way for the sunny days ahead.

May Average Humidity in Bethlehem

This chart illustrates the average monthly humidity levels in Bethlehem, 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.
JanFebMarAprMayJunJulAugSepOctNovDec87%85%85%83%75%74%65%62%66%79%87%85%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Bethlehem

As May arrives in Bethlehem, the UV Index escalates to a striking 10, marking a period of very high exposure that necessitates increased caution under the sun. The burn time dips to just 15 minutes, mirroring the trends observed in April, where the UV Index reached 8. This significant jump from the 6 in March highlights the transition into summer, stressing the importance of protective measures. Following May, June and July maintain the same elevated UV Index of 10, encouraging residents and visitors alike to be vigilant about sun safety. For more detailed insights into UV patterns throughout the year, visit Bethlehem UV Index.

Maximum UV Index Levels in Bethlehem for May

The chart shows the monthly maximum UV Index (UVI) for Bethlehem 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.
JanFebMarAprMayJunJulAugSepOctNovDec356810101098642
Data source: Bethlehem 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 Bethlehem

As spring blossoms into summer, May in Bethlehem shines with 266 hours of glorious sunlight, marking a delightful peak in the seasonal transition. This notable increase follows the steady rise in daylight from January's mere 136 hours, gradually climbing through March and April. The pattern reflects a vibrant surge of sunshine, with 266 hours in May leading into even sunnier days ahead in June and July, which boast 304 and 334 hours, respectively. This upward trend not only enhances outdoor activities but also imbues the community with a lively, sun-kissed spirit, setting the stage for a joyful summer.

Monthly Sunshine Duration in Bethlehem: May Highlighted

The May sunshine duration represents the total number of hours Bethlehem 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.
JanFebMarAprMayJunJulAugSepOctNovDec136h172h239h236h266h304h334h301h265h212h203h169h
Data source: Bethlehem May Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Bethlehem During May

In Bethlehem, United States, the likelihood of sunny weather in May reflects a modest trend within the yearly pattern. At 39%, the chance of sunshine slightly dips from April's 42%, suggesting that while May enjoys some sunny days, it doesn't consistently shine as brightly as some other months. This percentage is comparable to other shoulder months like January and June, both hovering around the same mark, but notably lower than the summer peak in July, which reaches 45%. As spring transitions towards summer, one can expect May to offer a mix of sun and clouds, making it a delightful yet unpredictable time for outdoor activities.

Percentage of Sunny Days in May in Bethlehem

The chart illustrates the percentage of sunny days in Bethlehem 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 Bethlehem experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec38%27%55%42%39%38%45%32%46%34%54%30%
Data source: Bethlehem May chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Bethlehem in May

As spring blossoms into summer, Bethlehem, United States experiences a delightful increase in daylight duration, reaching a peak of 14 hours in May. This month marks a significant transition, as the daylight steadily climbs from a mere 9 hours in January to a vibrant 15 hours in June. The gradual warming days invite outdoor activities and longer evenings, creating a lively atmosphere. By August, daylight begins to wane slightly, settling back to 13 hours, while the subsequent months signal the return to shorter days. This rhythmic ebb and flow of daylight not only shapes the local lifestyle but also highlights the beauty of seasonal change in Bethlehem.

Average Daylight Hours in Bethlehem for May

The chart illustrates the variation in daylight duration in Bethlehem throughout the year, with May highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 37m10h 39m11h 58m13h 19m14h 27m15h 1m14h 43m13h 42m12h 24m11h 4m9h 53m9h 17m
Data source: Bethlehem daylight hours, calculated by summing the hours between sunrise and sunset for each day.

May Winds in Bethlehem

In May, Bethlehem experiences a gentle decline in wind speed, with an average of 2.8 m/s (6 mph), slightly lower than the preceding months. This trend marks a seasonal shift as the spring breeze gradually gives way to a calmer atmosphere leading into summer. The winds in January to April tend to maintain a consistent vigor, hovering near 3.0 to 3.4 m/s, creating lively conditions. However, starting in May, the winds soften and continue to mellow through the summer months, suggesting a peaceful transition for both the environment and residents as they enjoy the warmer days ahead. This shift not only illustrates the typical pattern of seasonal change but also enhances the serene charm of Bethlehem in late spring.

Average May Wind Speed in Bethlehem

The chart displays monthly wind speed patterns in Bethlehem, 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.
JanFebMarAprMayJunJulAugSepOctNovDec3.23.03.43.12.8 m/s2.32.22.12.72.62.72.7
Data source: Bethlehem May wind data, generated using information from the Copernicus Climate Change Service.

How May Weather in Bethlehem Compares to Other Months

The weather in Bethlehem 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 Bethlehem and find detailed weather information for every month.

When comparing the weather in May and January, significant differences emerge. May experiences a more moderate temperature range, with minimums of 0°C (32°F) and maximums reaching up to 33°C (91°F), resulting in an average of 16°C (62°F). In contrast, January is much colder, with temperatures plummeting to a minimum of -20°C (-4°F) and an average of just 0°C (32°F). Additionally, May sees higher precipitation levels at 139 mm (5.5 in) over 13 days, while January has only 72 mm (2.8 in) over 8 days. Humidity in May averages around 75%, slightly lower than January's 87%. For more details on January's weather, visit Bethlehem weather in January.

In comparing the weather of May and February, it's clear that May experiences much milder temperatures, with a minimum of 0°C and an average of 16°C, while February can see lows plummeting to -19°C, averaging just 1°C. May can reach maximum temperatures of 33°C, significantly higher than February's peak of 25°C. Precipitation levels are quite similar, with May receiving 139 mm over 13 days compared to February's 108 mm over 12 days, though humidity levels in February are slightly higher at 85% versus May's 75%. For more details about February weather, you can visit Bethlehem weather in February.

When comparing the weather in May and March, it's clear that May experiences significantly milder temperatures, with average highs reaching 16°C (62°F) compared to just 5°C (40°F) in March. While March can still see maximum temperatures of up to 26°C (78°F), it also has the potential for much colder nights, with minimum temperatures dipping to -20°C (-4°F). Precipitation is more frequent in May, with rainfall occurring on 13 days and totaling 139 mm (5.5 in), whereas March sees slightly less precipitation over 11 days with a total of 98 mm (3.9 in). Humidity levels are comparable but slightly higher in March at 85% versus 75% in May. For more detailed information on March weather, you can visit Bethlehem weather in March.

In comparing the weather of May and April, May generally brings warmer temperatures, with an average of 16°C (62°F) compared to April's 10°C (51°F). While April experiences a minimum temperature of -4°C (25°F), May sees a milder minimum of 0°C (32°F) and a maximum that can rise to 33°C (91°F) compared to April's 29°C (85°F). However, May also has slightly higher precipitation levels at 139 mm (5.5 in) over 13 days, in contrast to April's 108 mm (4.2 in) over 12 days. Humidity remains high in both months, with April being slightly more humid at 83% versus May's 75%. For more details, you can visit Bethlehem weather in April.

In May, temperatures can range significantly, with a minimum of 0°C (32°F) and a maximum reaching up to 33°C (91°F), resulting in an average temperature of 16°C (62°F). The month experiences considerable precipitation, totaling 139 mm (5.5 in) over 13 days, accompanied by a humidity level of 75%. In contrast, June brings warmer weather with a minimum temperature of 6°C (43°F) and a maximum of 35°C (94°F), leading to a higher average of 21°C (70°F). Precipitation decreases slightly to 102 mm (4.0 in) across 12 days, while humidity falls to 73%. For more detailed insights, check out Bethlehem weather in June.

May and July exhibit contrasting weather patterns, reflecting the transition from spring to summer. In May, temperatures can dip as low as 0°C (32°F) and reach an average of 16°C (62°F), with a maximum of 33°C (91°F). Precipitation is substantial, with 139 mm (5.5 in) of rain over approximately 13 days, contributing to a high humidity level of 75%. Conversely, July offers warmer conditions, with minimum temperatures of 13°C (55°F) and an average of 25°C (76°F), peaking at 36°C (96°F). Rainfall in July is slightly lower, totaling 127 mm (5.0 in) across about 12 days, and the humidity decreases to 65%. For more detailed insights on July weather, you can check Bethlehem weather in July.

May and August present notable differences in weather patterns. In May, temperatures range from a cool 0°C (32°F) at night to a warm 33°C (91°F) during the day, with an average of 16°C (62°F). The month experiences significant rainfall, with 139 mm (5.5 inches) falling over 13 days and humidity levels remaining high at 75%. In contrast, August offers a milder minimum temperature of 11°C (52°F) and an average of 23°C (74°F), peaking at 34°C (94°F). Precipitation levels are similar, with 140 mm (5.5 inches) and 13 days of rain, but humidity drops to a comfortable 62%. For more details on August weather, you can check Bethlehem weather in August.

May and September exhibit distinct weather characteristics, despite both experiencing maximum temperatures that can reach into the low 30s Celsius (high 80s to low 90s Fahrenheit). In May, temperatures range from a chilly 0°C (32°F) to a warm average of 16°C (62°F), with significant humidity at 75% and considerable rainfall of 139 mm (5.5 in) over 13 days. In contrast, September enjoys a slightly warmer average temperature of 20°C (68°F) with minimums around 3°C (37°F), and less humidity at 66%. Additionally, precipitation decreases to 109 mm (4.3 in) over just 9 days, making September a more pleasant and drier month overall. For more detailed information, you can check Bethlehem weather in September.

May and October present distinct weather characteristics, with May generally experiencing warmer temperatures. May boasts average highs of 33°C (91°F) and lows down to 0°C (32°F), while October sees minimal temperatures at 1°C (34°F) and average highs also reaching 33°C (91°F), although its overall average temperature is lower at 14°C (58°F). In terms of precipitation, May has a slightly wetter profile with 139 mm (5.5 in) over 13 days compared to October's 123 mm (4.8 in) across 10 days. Humidity is a bit higher in October at 79% versus 75% in May, contributing to a slightly more humid atmosphere as the year progresses. For more information, check out Bethlehem weather in October.

May and November present starkly contrasting weather patterns. In May, temperatures range from a low of 0°C (32°F) to a high of 33°C (91°F), with an average of 16°C (62°F). This month sees about 139 mm (5.5 in) of precipitation over 13 days and a humidity level of 75%. In contrast, November features much cooler temperatures, with a minimum of -13°C (9°F) and a maximum of 24°C (75°F), averaging just 6°C (43°F). Precipitation during this month is less abundant at 91 mm (3.6 in) over 9 days, but the humidity is higher at 87%. For more details on November weather, check out Bethlehem weather in November.

May and December present contrasting weather patterns. In May, temperatures range from a chilly 0°C (32°F) at night to a warm 33°C (91°F) during the day, averaging around 16°C (62°F). This month sees a fair amount of precipitation, with 139 mm (5.5 in) distributed over 13 days and a humidity level of 75%. In stark contrast, December experiences much colder temperatures, with lows plunging to -14°C (8°F) and highs only reaching 17°C (63°F), averaging just 2°C (36°F). Precipitation is slightly less, at 108 mm (4.2 in) over 11 days, accompanied by a higher humidity of 85%. These differences highlight the significant seasonal shift in Bethlehem's climate. For more details, check out Bethlehem weather in December.

Compare Bethlehem's Climate with Cities Worldwide

Conclusion: What to Expect From May Weather in Bethlehem

As May unfolds in Bethlehem, residents experience a refreshing shift in weather with warmer temperatures and increased humidity, making it distinct from the cooler months that precede it. With a noticeable rise in average daily temperatures and the occasional high reaching into the low thirties Celsius, May offers a delightful preview of summer vibes. However, it also brings more frequent rainfall, with about half of the month likely seeing precipitation on 13 days, contributing to a lush landscape. If you're keen to learn more about Bethlehem's climate and how May fits into the yearly cycle, be sure to check out Bethlehem Climate.