Last updated: August 31, 2025
March in Isabela, Puerto Rico offers a delightful blend of warm temperatures and refreshing tropical rains. With maximum temperatures reaching 29°C (84°F) and an average of 25°C (76°F), visitors can enjoy pleasant days, while evenings cool down to a comfortable 21°C (70°F). However, be prepared for the wet season, as March sees about 72 mm (2.8 in) of rain spread over 17 days, contributing to the island's lush landscapes. Humidity levels hover around 74%, enhancing the tropical feel and making it an ideal time for both adventure seekers and those looking to unwind amidst the beauty of the Caribbean.
In March, Isabela, Puerto Rico enjoys delightful temperatures that perfectly capture the essence of spring. With a minimum of 21°C (70°F) and a maximum of 29°C (84°F), this month feels refreshingly mild yet comfortably warm. The average temperature remains stable at 25°C (76°F), consistent with the preceding months, and a hint of warmth that foreshadows the approaching summer. March continues to embrace the trend of rising temperatures seen since January, inviting visitors to relish in the balmy conditions. As the days grow longer, Isabela offers an ideal escape for those seeking sun-kissed adventures amid the beauty of Puerto Rico's vibrant landscapes.
In March, Isabela, Puerto Rico experiences a notable uptick in precipitation, receiving 72 mm (2.8 in) of rain over 17 days. This marks a significant increase compared to the preceding months, with January and February recording only 34 mm and 39 mm, respectively. As the island transitions into the wetter spring season, March serves as a precursor to the forthcoming deluges of late spring and summer, characterized by rising rainfall amounts. The pattern indicates a gradual shift toward increased humidity and moisture, setting the stage for the more intense precipitation expected in the following months, particularly as May and August often see substantial spikes, each averaging 97 mm of rain.
March in Isabela, Puerto Rico, sees a slight dip in humidity, settling at 74%, which marks a gentle decline from the 75% recorded in February. This transition indicates the tail end of the cooler months, as humidity begins to stabilize before the warmer, more humid summer months. Following March, humidity levels gradually creep back up, reaching 80% in July and August, showcasing a noticeable seasonal trend where high humidity prevails during the summer. Overall, the humidity patterns reflect Isabela's tropical climate, maintaining a generally high moisture content throughout the year, with peaks in the summer months and a slight respite in early spring.
In March, Isabela, Puerto Rico, experiences an extreme UV Index of 13, with a burn time of just 10 minutes. This marks a notable continuity from February's UV Index, which peaked at 11, as the region transitions into a spring season characterized by heightened sun exposure. As the months progress into April and May, the UV Index reaches even higher levels, peaking at 14 in May, indicating a consistent trend of increasing solar intensity. Therefore, those enjoying the beautiful outdoors should remain vigilant about sun protection. For detailed insights, you can refer to the Isabela UV Index.
UV Risk Categories
As March unfolds in Isabela, Puerto Rico, the sun shines brighter and longer, offering a delightful 347 hours of sunshine that sets the stage for the vibrant energy of spring. This marked increase from 307 hours in February showcases the gradual transition to longer days, inviting both locals and visitors to bask in the warmth and beauty of the island. With April's sunshine slightly edging up to 352 hours, the trend continues towards sunnier months ahead, highlighting the allure of Puerto Rico's tropical paradise as it flourishes into the season. Such ample sunlight not only uplifts spirits but also fosters an idyllic environment for outdoor adventures, making March an optimal time to explore Isabela's stunning coastline and lush landscapes.
In March, Isabela, Puerto Rico experiences a 66% chance of sunny weather, making it one of the more favorable months for sun seekers. This is a pleasant decline from the 77% peak in February, yet still notably higher than the months that follow, such as April's 50% and May's 55%. The trend suggests that while the sun is still likely to shine in March, the onset of spring brings a gradual decrease in sunny days as the region approaches the summer months. With March nestled in a period of fluctuating sunlight, it serves as a key time for visitors looking to enjoy the island’s beautiful beaches and landscapes before the heat and humidity ramp up in the following months.
As winter gives way to spring in Isabela, Puerto Rico, March marks a delightful transition with an increase in daylight hours. With 12 hours of sunlight gracing the sky, this month heralds a brighter atmosphere, building upon the steady 11 hours seen in January and February. The trend toward longer days continues, peaking at 13 hours in June and July, but it’s in March that many feel the invigorating shift towards summer. This gradual lengthening of daylight not only enhances outdoor activities but also invites residents and visitors alike to bask in the unfolding beauty of the island as it awakens from the cooler months.
In March, Isabela, Puerto Rico experiences a gentle breeze that dances across its stunning landscapes, with an average wind speed of 5.1 m/s (11 mph). This period marks a slight dip from February's higher winds, reflecting a transitional phase as the island prepares for warmer months ahead. Interestingly, this moderate wind speed is consistent with January and June, hinting at a seasonal rhythm that offers both adventure and relaxation. As the summer approaches, the winds tend to pick up again, peaking in July at 5.3 m/s (12 mph), before gradually easing into the calmer days of late summer and autumn. March, therefore, serves as a perfect window to enjoy Isabela’s natural beauty, embracing the invigorating yet soothing winds that shape the island's climate.
Weather in Isabela varies notably across the year, with each month offering distinct climate conditions. This page compares March’s weather to other months in Isabela, focusing on differences in temperature, rainfall, humidity, and UV levels.
In comparing the weather between January and March, both months exhibit similar temperature patterns, with averages hovering around 25°C (77°F). January starts with a slightly warmer minimum temperature of 20°C (69°F), while March sees a minimum of 21°C (70°F). However, March experiences significantly higher precipitation, totaling 72 mm (2.8 in) over 17 days, compared to just 34 mm (1.3 in) across 11 days in January. The humidity levels are also comparable, with March at 74% and January at 76%. For more detailed information on January's climate, you can check Isabela weather in January.
In comparing the weather patterns of March and February, both months exhibit similar average temperatures, with a minimum of around 21°C (70°F) and an average of 25°C (76°F). However, March experiences slightly higher maximum temperatures, peaking at 29°C (84°F), compared to February’s maximum of 30°C (86°F). Rainfall is more prevalent in March, accumulating 72 mm (2.8 inches) over 17 days, while February sees less precipitation, with just 39 mm (1.5 inches) over 13 days. Humidity remains fairly consistent, with March at 74% and February at 75%. For a detailed look at February weather, you can visit Isabela weather in February.
March and April present similar but slightly distinct weather patterns. In March, temperatures range from a minimum of 21°C (70°F) to a maximum of 29°C (84°F), with an average of 25°C (76°F). This month experiences 72 mm (2.8 in) of precipitation over 17 days and humidity levels at 74%. In contrast, April sees a slight increase in minimum temperature at 22°C (72°F) and a maximum of 30°C (86°F), maintaining the average at 25°C (78°F). Precipitation decreases slightly to 66 mm (2.6 in) over 14 days, with humidity at a comparable 75%. Overall, while both months share warm temperatures, April tends to be a bit warmer and drier. For more details, check Isabela weather in April.
In comparing the weather between March and May, March experiences a slightly cooler temperature range, with average highs of 29°C (84°F) and lows around 21°C (70°F). It also has moderate precipitation, totaling 72 mm (2.8 in) over 17 days and maintaining a humidity level of 74%. In contrast, May brings warmer conditions, with average temperatures reaching 31°C (88°F) at their peak, while the minimum sits at a comfortable 23°C (74°F). Notably, May is wetter, accumulating 97 mm (3.8 in) of rainfall across 19 days, accompanied by a similar humidity level of 75%. For a detailed look at May’s weather in Isabela, you can refer to Isabela weather in May.
In March, the weather is relatively mild with average temperatures ranging from a minimum of 21°C (70°F) to a maximum of 29°C (84°F), accompanied by a moderate level of humidity at 74%. This month experiences a total precipitation of 72 mm (2.8 in) over 17 days, making it a somewhat wet period. In contrast, June sees warmer temperatures, with averages between 24°C (76°F) and 31°C (88°F) and a slight increase in humidity to 77%. Additionally, June has a higher total precipitation of 85 mm (3.3 in) over the same number of rainy days. For more detailed information about June weather, visit Isabela weather in June.
March and July both feature warm temperatures, but July is consistently hotter, with average temperatures ranging from 24°C (76°F) to 31°C (88°F), compared to March's milder range of 21°C (70°F) to 29°C (84°F). In terms of precipitation, July sees slightly more rainfall at 91 mm (3.6 in) over 18 days, while March experiences 72 mm (2.8 in) over 17 days. Additionally, humidity levels are higher in July at 80%, compared to March's 74%. For those interested in specific July conditions, more information can be found here.
March and August both showcase warm weather but with distinct differences. In March, temperatures range from a minimum of 21°C (70°F) to a maximum of 29°C (84°F), with an average temperature of 25°C (76°F). The month sees around 72 mm (2.8 in) of precipitation over 17 days, and humidity levels hover at 74%. In contrast, August is typically warmer, with minimum temperatures of 24°C (76°F) and a maximum of 32°C (89°F), leading to an average of 27°C (82°F). August experiences more rainfall, totaling 97 mm (3.8 in) over 20 days, alongside slightly higher humidity at 80%. For a detailed look at August weather, check out Isabela weather in August.
March and September present striking contrasts in weather patterns. In March, temperatures range from a mild low of 21°C (70°F) to a comfortable average of 25°C (76°F), peaking at 29°C (84°F). The month experiences moderate precipitation, totaling 72 mm (2.8 in) over 17 days, accompanied by a humidity level of 74%. In contrast, September brings warmer temperatures, with lows at 25°C (77°F), an average of 27°C (81°F), and highs reaching 31°C (88°F). Precipitation significantly increases to 188 mm (7.4 in) over 23 days, and humidity rises to 79%. For more details on September weather, visit Isabela weather in September.
In comparing the weather of March and October, we can see notable differences in both temperature and precipitation. March typically has a minimum temperature of 21°C (70°F) and an average of 25°C (76°F), peaking at 29°C (84°F). In contrast, October experiences slightly warmer temperatures, with a minimum of 24°C (76°F), an average of 27°C (81°F), and a maximum of 31°C (88°F). Precipitation also varies, as March sees about 72 mm (2.8 in) spread over 17 days, while October records a higher 127 mm (5.0 in) over 21 days. Humidity levels are similar, with March at 74% and October at 78%. For those interested in more detailed information, take a look at Isabela weather in October.
March and November boast relatively similar warm temperatures, with March experiencing a range from 21°C (70°F) to 29°C (84°F) and November slightly warmer, with temperatures ranging from 23°C (74°F) to 30°C (85°F). Both months see significant rainfall, but November typically has more precipitation, totaling 99 mm (3.9 in) across 19 days compared to March's 72 mm (2.8 in) over 17 days. The humidity also increases slightly in November at 78%, compared to March's 74%. For a more detailed look at November weather patterns, check out Isabela weather in November.
In March, temperatures range from a mild 21°C (70°F) to a warm 29°C (84°F), with an average of 25°C (76°F). The month experiences a higher level of precipitation, totaling 72 mm (2.8 in) over approximately 17 days, contributing to a humidity level of 74%. In contrast, December sees slightly higher minimum temperatures at 23°C (73°F) and maximums reaching up to 30°C (86°F), with an average temperature also around 25°C (78°F). The rainfall is less pronounced in December, with only 43 mm (1.7 in) over 15 days and a humidity level of 76%. For more detailed insights, you can check Isabela weather in December.
As March unfolds in Isabela, visitors can expect warm temperatures that create a pleasant atmosphere, setting it apart from the cooler months of winter. This month witnesses a notable increase in both humidity and precipitation, with the region experiencing about half of its average rainy days, contributing to a vibrant, lush environment. While temperatures remain consistently mild, the occasional showers serve as a refreshing contrast, leaving the landscape rejuvenated and appealing for outdoor activities. For a deeper dive into how Isabela’s climate evolves throughout the year, check out Isabela Climate.