Last updated: January 18, 2025
Saipan, located in the Northern Mariana Islands, is characterized by a tropical rainforest climate classified as Af according to the Köppen-Geiger system. This climate features warm temperatures throughout the year, with a notable minimum of 24°C (76°F) in February, an average of 27°C (82°F), and a maximum peak reaching 30°C (86°F) in August. Such consistent warmth creates a lush, vibrant ecosystem that thrives under the tropical conditions, making Saipan a unique environmental gem in the Pacific.
In Saipan, Northern Mariana Islands, temperature patterns exhibit a subtle yet consistent seasonal rhythm. The year begins with daytime highs averaging around 28°C (83°F) in the cooler January and February months, where minimum temperatures hover around 24°C (76°F). As spring approaches, March maintains similar warmth, but by April, temperatures shift slightly upward, peaking at 29°C (84°F). The summer months of June through September bring the highest warmth, with average daily highs consistently reaching 30°C (86°F), while minimum temperatures remain stable around 25-26°C (78-79°F). As the year comes to a close, temperatures gradually decline while remaining comfortably warm, with December recording a slight dip back to averages of 27°C (82°F). This warm tropical climate results in minimal temperature fluctuations, providing a stable environment for both residents and visitors year-round.
Saipan experiences a tropical climate with February temperatures ranging from a minimum of 24°C (76°F) to a maximum of 30°C (86°F) in August, highlighting the warm weather throughout the year. For more detailed monthly temperatures, you can visit monthly temperatures in Saipan.
Saipan experiences a pronounced seasonal rainfall pattern, with January to May seeing relatively moderate precipitation levels. In these months, rainfall ranges from 41 mm (1.6 in) in March to 63 mm (2.5 in) in April, with approximately 13 to 20 rainy days each month. This early part of the year provides a lush environment, although humidity starts to build as June arrives, marked by a notable increase in rainfall to 120 mm (4.7 in) over 21 days, signaling the onset of the wet season.
The peak of the rainy season occurs during the summer months, with July and August experiencing extraordinary precipitation, recording 265 mm (10.4 in) and 409 mm (16.1 in), respectively. August stands out with the highest rainfall, falling over 29 days, followed by a slight reduction in September and October, which still see substantial totals of 320 mm (12.6 in) and 365 mm (14.4 in). As the year concludes, rainfall diminishes significantly, dropping to 74 mm (2.9 in) in December, illustrating the transition back to a drier season.
In Saipan, sunshine duration exhibits a clear seasonal trend, with hours of sunlight steadily increasing from the winter months into summer. Starting the year with 230 hours of sunshine in January, there is a significant rise through February and March, reaching 322 hours by the latter. The peak sunshine month is May, boasting 339 hours, which coincides with the transition into the warmer and more stable summer weather. This uptick in solar exposure not only enhances the picturesque landscapes but also promotes tourism during this sun-rich period.
As summer progresses, sunshine hours begin to slightly decline, although they remain substantial. From June to August, Saipan experiences between 275 to 322 hours of sunlight, with a noticeable drop in August (275 hours). The arrival of September signals a continuation of this trend, as the days grow shorter, culminating in 264 hours of sunshine. As the year nears its end, sunshine hours fluctuate modestly, with November and December maintaining around 283 to 288 hours. Overall, Saipan's climate offers a compelling mix of abundant sunlight, particularly in late spring and early summer, making it an ideal destination for sun-seekers.
The UV Index in Saipan, Northern Mariana Islands, reveals significant variability throughout the year, reinforcing the need for sun safety awareness among residents and visitors alike. At the beginning of the year, January displays a UV Index of 10, classified as very high, indicating a burn time of just 15 minutes. This trend quickly escalates in February, reaching 12 and being categorized as extreme, which remains consistent until November. The peak levels occur in March and April, where the UV Index escalates to a striking 14 and 15, with burn times reduced to just 10 minutes. With such high readings, these early months of the year serve as critical reminders of the intensity of sun exposure in this tropical climate.
As the summer progresses, the UV Index stabilizes at 14 from June through September, maintaining an extreme categorization and a brief burn time of just 10 minutes—a clear cue for sun protection. This pattern slightly wanes into October with a UV Index of 13, before dropping back to 11 in November and retreating to 10 by December. Despite the fluctuations, the overall high UV Index throughout the year underscores the importance of taking proactive measures against sunburn and skin damage. Ultimately, understanding this seasonal UV trend is crucial for maximizing enjoyment of Saipan's sun-drenched lifestyle while minimizing health risks.
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In Saipan, Northern Mariana Islands, daylight duration exhibits a consistent and stable pattern throughout the year, largely influenced by its equatorial location. From January to February, daylight remains at a consistent 11 hours, providing a reliable amount of sunlight during the cooler months. As spring approaches in March, daylight increases slightly to 12 hours, a level maintained through the month of May. This incremental rise in daylight signals a gradual transition towards longer days as the region warms up, fostering a leisurely tropical lifestyle.
The peak daylight duration occurs in June, with 13 hours of sunlight, allowing ample time for outdoor activities and exploration. Following this peak, daylight begins to taper off, returning to 12 hours in July through September. By October, the duration drops back to 11 hours, a pattern that persists through the end of the year. This relatively minor fluctuation in daylight hours reflects the tropical climate's consistent brightness and warmth, making Saipan a favorable destination for sun enthusiasts year-round.
Saipan, Northern Mariana Islands, enjoys a tropical climate characterized by warm temperatures and distinct wet and dry seasons. Throughout the year, average temperatures range from 27°C (80°F) in January to 28°C (82°F) in the warmer months. Rainfall varies significantly, with August and October receiving the highest amounts at 409 mm (16.1 in) and 365 mm (14.4 in), respectively. Despite the rain, Saipan sees ample sunshine, with May offering the most hours at 339. For more detailed information, visit Saipan climate.
In summary, Saipan's climate presents a captivating blend of warm temperatures, consistent sunshine, and a high UV index throughout the year, making it an alluring destination for both relaxation and adventure. With seasonal rainfall patterns that enhance its lush landscapes and stable daylight duration that ensures plenty of sunlight for outdoor pursuits, residents and visitors are offered a tropical environment ripe for exploration. However, the region's high UV Index underscores the necessity for sun protection, particularly during the peak months. Overall, understanding these climatic characteristics allows for a more enjoyable and safe experience in Saipan's vibrant paradise.