May Weather in Rayong, Thailand

Last updated: August 27, 2025

In May, Rayong, Thailand experiences a warm and humid climate, characterized by maximum temperatures reaching 35°C (95°F) and an average temperature around 29°C (84°F). Nights can be pleasantly cool, with minimum temperatures dropping to 22°C (71°F). This month is also notable for its frequent rainfall, with a total precipitation of 239 mm (9.4 in) spread over 24 days, contributing to a high humidity level of approximately 80%. Visitors should be prepared for both the heat and the potential for daily showers, making it essential to embrace the tropical beauty that the region has to offer during this lively month.

May Temperature in Rayong

In May, Rayong, Thailand, experiences warm and inviting temperatures that embody the essence of early summer. With a minimum of 22°C (71°F) and a maximum soaring to 35°C (95°F), the thermometers indicate a noticeable increase compared to previous months, continuing the upward trend initiated in April. The average temperature rests comfortably at 29°C (84°F), providing the perfect climate for beach outings and outdoor adventures. This month marks a transition towards even warmer conditions, with humidity levels rising as the rainy season approaches, hinting at a vibrant and dynamic atmosphere perfect for both relaxation and exploration.

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

The chart illustrates May temperature patterns in Rayong, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Rayong, May typically has an average temperature of {2}°C ({3}°F), with highs reaching up to {4}°C ({5}°F) and lows dropping to around {6}°C ({7}°F).
JanFebMarAprMayJunJulAugSepOctNovDec808183838484838382828180
Data source: Temperature data for Rayong generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

May Precipitation in Rayong

May marks a significant shift in Rayong, Thailand's precipitation patterns, showcasing a noteworthy peak in rainfall that doubles that of April. With an impressive 239 mm (9.4 in) of rain falling over 24 days, this month sets the stage for the region's lush, tropical landscape. The consistent downpours not only contribute to the monthly total but also indicate a transition into the heart of the wet season, as June and July maintain similar levels of rainfall—211 mm (8.3 in) and 226 mm (8.9 in) respectively. This trend underscores the importance of May as a crucial month for agriculture and local water reservoirs, preparing the land for the wet months ahead and offering a vibrant backdrop for life in Rayong.

May Precipitation Trends in Rayong

The chart displays monthly precipitation patterns in Rayong, 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. In Rayong, May typically receives around {2} mm ({3} inches) of precipitation spread over approximately {4} days.
JanFebMarAprMayJunJulAugSepOctNovDec3530781582392112262233222937136
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

May Humidity in Rayong

In Rayong, Thailand, the month of May marks a significant shift in humidity levels, soaring to a notable 80%. This increase signals the onset of the wet season, as the humidity continues to climb from April's 70%. Following May, June sees even higher levels at 85%, indicating that the sweltering heat and moisture combo is becoming more pronounced. As we progress into the peak of the rainy season, humidity peaks in August at a lush 88%, creating a distinctly tropical atmosphere. This pattern highlights a clear trend of rising humidity from the drier months of January through April, ultimately reaching its zenith before gradually tapering off into the cooler months of the year.

May Average Humidity in Rayong

This chart illustrates the average monthly humidity levels in Rayong, with May’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In May, average humidity in Rayong is approximately {2}%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec59%58%61%70%80%85%86%88%87%83%78%70%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Rayong

In May, Rayong, Thailand, experiences a persistent UV Index of 14, categorizing the sun exposure as extreme. This level of intensity necessitates caution, as the recommended burn time is a mere 10 minutes. Following a trend observed since February, the UV Index remains high through the month, continuing into the summer. With similar readings also reported in April and the months that follow, residents and visitors alike should prioritize sun protection strategies. For further information on managing UV exposure in Rayong, check the detailed resources available at Rayong UV Index.

Maximum UV Index Levels in Rayong for May

The chart shows the monthly maximum UV Index (UVI) for Rayong 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. In May, the maximum UV index in Rayong typically reaches {2}, which falls under the {3} exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec101314141413141414131110
Data source: Rayong 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 Rayong

In Rayong, Thailand, May continues the trend of abundant sunshine, averaging 303 hours of bright daylight. This month follows a series of sun-drenched days from March to April, where hours peaked impressively at 334 and 312, respectively. The gentle decline in June to 286 hours still maintains a strong overall average, ensuring the region enjoys a vibrant transition into the warmer months. Despite the gradual decrease leading into the monsoon season, May's ample sunshine hints at a lingering warmth, perfect for outdoor adventures and beachside relaxation.

Monthly Sunshine Duration in Rayong: May Highlighted

The May sunshine duration represents the total number of hours Rayong 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.
JanFebMarAprMayJunJulAugSepOctNovDec251h297h334h312h303h286h268h273h246h268h295h312h
Data source: Rayong May Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Rayong During May

As May rolls in, Rayong, Thailand experiences a notable dip in sunny weather, with only a 28% chance of sunshine. This marks a significant decline from the sunniest months earlier in the year, where February boasts a robust 66% likelihood of clear skies. Following the bright days of February, the chances plummet as April's heat sets in, further dropping to a mere 17% before May's arrival. Unfortunately, this trend of diminishing sunlight continues into the rainy season, with June and July further reducing sun chances to 19% and 13%, respectively. As the month progresses, those looking for sunshine in Rayong may need to adjust expectations based on historical patterns.

Percentage of Sunny Days in May in Rayong

The chart illustrates the percentage of sunny days in Rayong 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 Rayong experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec54%66%49%17%29%19%13%9%7%11%22%55%
Data source: Rayong May chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Rayong in May

In Rayong, Thailand, the daylight duration showcases a captivating rhythm throughout the year. The year begins with 11 hours of daylight from January through February, creating a gently bright atmosphere. As March rolls in, days lengthen to 12 hours, and this extended sunlight persists through the summer months. By April, the transition is complete, and residents enjoy a consistent 12-hour daylight pattern lasting until September. As October approaches, daylight diminishes again to 11 hours, reminiscent of the earlier months, before settling back into this cycle of 11 hours of daylight in November and December. This predictable ebb and flow of sunlight not only influences daily activities but also enriches the vibrant culture of Rayong with a steady rhythm of light and life.

Average Daylight Hours in Rayong for May

The chart illustrates the variation in daylight duration in Rayong throughout the year, with May highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec11h 27m11h 42m12h 3m12h 24m12h 42m12h 51m12h 46m12h 30m12h 10m11h 49m11h 31m11h 22m
Data source: Rayong daylight hours, calculated by summing the hours between sunrise and sunset for each day.

May Winds in Rayong

In Rayong, Thailand, the winds of May offer a gentle yet refreshing breeze, with an average wind speed of 2.3 m/s (5 mph). This month showcases a subtle dip in wind strength compared to the more lively winds of June and July, which peak at 3.2 m/s (7 mph). As the dry season transitions into the wetter months, May serves as a transitional period where the breezes provide a pleasant backdrop to the increasing warmth and humidity. Furthermore, the consistency in wind patterns from earlier months like February and March highlights a stabilizing trend, making May an ideal time for outdoor activities without the overpowering gusts often seen later in the season. As the winds shift in the coming months, the calmness of May can be a reminder of the tranquil beauty that precedes the heart of Thailand’s monsoon season.

Average May Wind Speed in Rayong

The chart displays monthly wind speed patterns in Rayong, 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.
JanFebMarAprMayJunJulAugSepOctNovDec2.82.32.42.02.3 m/s3.23.22.92.32.52.73.0
Data source: Rayong May wind data, generated using information from the Copernicus Climate Change Service.

How May Weather in Rayong Compares to Other Months

Weather in Rayong varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Rayong, focusing on differences in temperature, rainfall, humidity, and UV levels.

May and January present distinctly different weather patterns. In May, temperatures typically range from a minimum of 22°C (71°F) to a maximum of 35°C (95°F), with an average of 29°C (84°F). This month is characterized by high humidity at 80% and significant rainfall, averaging 239 mm (9.4 in) over about 24 days. In contrast, January offers milder conditions, with temperatures ranging from a minimum of 17°C (63°F) to a maximum of 34°C (93°F), and an average of 27°C (81°F). The month sees considerably less precipitation, with only 35 mm (1.4 in) over about 7 days and lower humidity at 59%. For a closer look at the January climate, you can check Rayong weather in January.

May and February showcase distinct weather patterns. In May, temperatures range from a minimum of 22°C (71°F) to a maximum of 35°C (95°F), with an average of 29°C (84°F), while February has slightly cooler temperatures, with a minimum of 19°C (66°F) and a maximum of 34°C (93°F), averaging 27°C (81°F). The most notable difference is in precipitation and humidity: May experiences significantly more rainfall, with 239 mm (9.4 in) over 24 days and high humidity at 80%, compared to February’s mild 30 mm (1.2 in) over just 7 days and lower humidity levels at 58%. For more detailed insights into February’s weather, you can visit Rayong weather in February.

In comparison to March, May experiences slightly higher temperatures, with average highs reaching up to 35°C (95°F) compared to March's maximum of 34°C (93°F). Although the minimum temperatures in March are a bit higher at 23°C (73°F) against May's 22°C (71°F), overall, May is warmer with an average temperature of 29°C (84°F) compared to March's 28°C (83°F). However, May is significantly wetter, receiving 239 mm (9.4 in) of precipitation over 24 days, while March has a much drier climate with only 78 mm (3.1 in) over 15 days. The humidity is also noticeably higher in May at 80%, compared to March's 61%. For more detailed insights on March weather, you can visit Rayong weather in March.

In comparing the weather between April and May, both months exhibit similar average temperatures, consistently reaching around 29°C (84°F) during the day, with maximum temperatures peaking at 35°C (95°F). However, May tends to be slightly warmer at night, with a minimum temperature of 22°C (71°F), compared to April's 19°C (66°F).

One significant difference lies in the precipitation levels; May experiences a considerable increase with 239 mm (9.4 in) of rain over 24 days, whereas April sees 158 mm (6.2 in) over 20 days. Additionally, the humidity rises in May to 80%, compared to April's 70%, contributing to a more humid atmosphere. For more details on April's climate, you can check out Rayong weather in April.

May and June both showcase warm temperatures, with average highs around 29°C (84°F). However, May experiences a slightly broader range, with temperatures reaching a maximum of 35°C (95°F) compared to June's peak of 34°C (93°F). Precipitation is prominent in both months, but May is wetter, accumulating 239 mm (9.4 in) of rain over 24 days, while June sees a reduction to 211 mm (8.3 in) of rainfall, also over 24 days. Humidity levels increase slightly in June, reaching 85% compared to May's 80%. For a more detailed look, check out Rayong weather in June.

In comparing the weather between May and July, we observe that both months are warm, but July experiences slightly higher minimum temperatures, with averages of 25°C (77°F) compared to May's 22°C (71°F). While May has a peak temperature of 35°C (95°F), July's maximum is slightly lower at 34°C (94°F). In terms of precipitation, May receives 239 mm (9.4 in) over 24 days, while July sees a bit less at 226 mm (8.9 in) across 26 days. Additionally, July has higher humidity at 86% compared to May's 80%, contributing to a more humid atmosphere. For a detailed outlook on the July weather, you can visit Rayong weather in July.

In May, temperatures in Rayong range from a minimum of 22°C (71°F) to a maximum of 35°C (95°F), with an average temperature of 29°C (84°F). The month experiences significant rainfall, totaling 239 mm (9.4 in) over 24 days, accompanied by high humidity levels of around 80%. In contrast, August presents slightly warmer nights with a minimum temperature of 24°C (76°F) and an average temperature of 28°C (83°F), peaking at 34°C (93°F) during the day. While the total precipitation in August is slightly lower at 223 mm (8.8 in) over 26 days, humidity increases to 88%. For more details, you can check out Rayong weather in August.

May and September share a warm climate, but several key differences characterize their weather patterns. In May, temperatures range from a minimum of 22°C (71°F) to a maximum of 35°C (95°F), with an average of 29°C (84°F). However, it is marked by significant rainfall, totaling 239 mm (9.4 in) over 24 days, coupled with high humidity at 80%. In contrast, September experiences slightly higher minimum temperatures at 24°C (75°F) and maintains similar averages at 28°C (82°F) and maximums of 34°C (93°F). Nonetheless, it sees increased precipitation, measuring 322 mm (12.7 in) over 26 days, and an even higher humidity level of 87%. For more detailed information, check out Rayong weather in September.

May and October present a distinct yet somewhat similar weather profile. In May, temperatures range from a minimum of 22°C (71°F) to a maximum of 35°C (95°F), with an average of 29°C (84°F). This month experiences substantial rainfall of 239 mm (9.4 in) over 24 days, with humidity levels at around 80%. Conversely, October sees slightly warmer nights with a minimum of 23°C (73°F) and a lower average temperature of 28°C (82°F), peaking at 34°C (93°F). Rainfall increases to 293 mm (11.5 in), also distributed across 24 days, and humidity peaks at 83%. For a more detailed look at October weather, you can visit Rayong weather in October.

May and November share similar minimum temperatures, both hovering around 22°C (71-72°F). However, May is typically hotter overall, with an average temperature of 29°C (84°F) compared to November's cooler 27°C (82°F). While May experiences significant rainfall, with 239 mm (9.4 in) over 24 days, November sees much less precipitation at 71 mm (2.8 in) across just 11 days. Despite the slightly higher humidity in May at 80%, November maintains a comfortable 78% humidity level. For more details on November weather, you can check Rayong weather in November.

May and December present quite different weather patterns. In May, temperatures can reach highs of 35°C (95°F) with an average around 29°C (84°F), while December is slightly cooler, with maximums of 34°C (94°F) and an average of 27°C (80°F). However, May is marked by significantly higher precipitation, receiving 239 mm (9.4 in) over 24 days, compared to just 36 mm (1.4 in) over 5 days in December. Moreover, humidity levels in May are higher at 80%, while December experiences a more comfortable 70%. For a detailed look at the weather during December, check out Rayong weather in December.

Compare Rayong's Climate with Cities Worldwide

Conclusion: What to Expect From May Weather in Rayong

As May unfolds in Rayong, the weather showcases a significant shift, with temperatures reaching their peak highs, making it notably warmer than the preceding months. With an average temperature around 29°C (84°F), days can feel particularly sultry, accentuated by a high humidity level of 80%, creating a tropical ambiance. May also brings an uptick in rainfall, with nearly 24 days of precipitation that contribute to an overall total of 239 mm (9.4 in), setting the stage for the lush green landscapes that characterize this season. While the warmth and humidity might be intense, this month offers a vivid contrast to the cooler, drier months leading up to summer. For more insights into the weather throughout the year, check out Rayong Climate.