Last updated: February 24, 2025
October in Port Jefferson, United States, is characterized by a blend of mild temperatures and moderate rainfall. The maximum temperature can reach 29°C (84°F), while the average hovers around 16°C (61°F), dipping to a chilly minimum of 5°C (41°F). This transitional month sees a total precipitation of 143 mm (5.6 in), spread across 12 days, contributing to a humidity level of 74%. As the leaves begin to change, October offers a picturesque yet brisk atmosphere perfect for enjoying autumn's beauty.
In October, Port Jefferson experiences a delightful transition into autumn, marked by mild temperatures that invite outdoor exploration. With a minimum temperature of 5°C (41°F) and an average of 16°C (61°F), the region enjoys pleasantly crisp days, while the maximum can reach a pleasant 29°C (84°F). This month provides a stark contrast to the winter chill that precedes it, showcasing a gradual warming trend from the cooler months of September and November. As fall foliage begins to adorn the landscape, October's blend of comfortable weather and vibrant natural beauty makes it a perfect time to savor the outdoors before winter settles in.
In October, Port Jefferson experiences a notable surge in precipitation, registering an impressive 143 mm (5.6 in), marking it as one of the wettest months of the year. This uptick in rainfall occurs over approximately 12 days, contributing to the vibrant autumn landscape. Compared to earlier months, October stands out not only for its increased rainfall but also for its significant growth from September's 94 mm, underscoring a transitional shift as the region moves deeper into fall. This trend of enhanced precipitation is conducive to the blooming colors of autumn foliage, making it a captivating time for both residents and visitors alike.
As October settles in Port Jefferson, the humidity reaches a moderate 74%, signaling a subtle shift from the more humid summer months. This increase from 68% in September contrasts sharply with the drier summer months of July and June, where the humidity dipped to 62% and 69%, respectively. Throughout the year, we observe a gradual decline in humidity from the winter highs, starting at a robust 84% in January and descending to the summer lows before starting to rise again in the fall. This pattern highlights a seasonal rhythm, where crisp autumn air intermingles with lingering warmth, creating a comfortable yet slightly more humid environment as the region prepares for the colder months ahead.
As the months transition in Port Jefferson, so does the UV Index, which peaks during the summer and begins to taper off as fall sets in. In October, the UV Index reaches a moderate high of 6, representing a significant decrease from the peak summer values of 10 in May and June, yet still requiring 25 minutes of outdoor exposure before the risk of sunburn increases. This trend showcases the seasonal shift, as residents enjoy more comfortable conditions while remaining vigilant against UV radiation. Following October, the UV Index will continue to decline, signaling a move toward lower exposure levels in November and December. For more detailed information on UV exposure throughout the year, check out Port Jefferson UV Index.
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As autumn settles in, October in Port Jefferson brings a delightful change with 225 hours of sunshine, marking a gentle transition from the bright, sun-soaked days of summer. After basking in the glory of July and August, which recorded a peak of 343 and 323 hours respectively, the sun begins to bid adieu, dipping from 282 hours in September. This month’s sunshine is a reminder of the warmth that lingers as the crisp air begins to take hold. While the daylight decreases heading into November with 210 hours, October offers a perfect balance, casting a golden glow over the vibrant fall foliage, making it an ideal time for outdoor activities before winter’s chill arrives.
As October rolls around in Port Jefferson, the chance of sunshine settles at 41%, reflecting a slight dip from the previous month. This trend is consistent with the gradual shift toward cooler temperatures and shorter days, as seen throughout the late summer and early autumn months. Compared to other fall months, October's sun chances feel moderate, nestling between the more favorable September (48%) and the sunnier November (56%). Overall, while sunshine may not be abundant, those crisp October days still hold the promise of bright moments amid changing leaves—a perfect backdrop for seasonal outings and festivities.
In Port Jefferson, October brings a notable shift in daylight duration as the days continue to shorten after the summer peak. With just 11 hours of daylight, the month reflects a steady decline from the summer months of 15 hours in June and 14 hours in July. As the vibrant colors of autumn begin to emerge, the daylight hours decrease, down from September's 12 hours. This gradual reduction signals the approach of winter, echoing the longer nights and cooler temperatures ahead. Interestingly, this annual cycle reveals a familiar rhythm, where the brightness of summer gives way to the cozy ambiance of fall, inviting residents to embrace the changing season.
As October unfolds in Port Jefferson, the average wind speed gently rises to 4.7 m/s (10 mph), reminiscent of the crisp breezes of early autumn. This increase offers a refreshing contrast to the summer months, where winds were at their calmest, averaging just 3.4 m/s (8 mph) in both July and August. The transition into October marks a subtle uptick from September's 4.3 m/s, continuing a slight upward trend that remains steady through November and December. Overall, the fall months herald a shift, balancing the mellow summer winds with the invigorating gusts of autumn, making it a perfect time for walks along the scenic waterfront, invigorated by nature's refreshing touch.
The weather in Port Jefferson changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of October's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Port Jefferson and find detailed weather information for every month.
October and January weather exhibit stark differences, both in temperature and precipitation. October boasts a milder climate with temperatures ranging from a minimum of 5°C (41°F) to a maximum of 29°C (84°F), accompanied by an average of 16°C (61°F). In contrast, January's biting cold sees temperatures plummeting to as low as -15°C (6°F), with an average of only 2°C (35°F) and a maximum of 15°C (60°F). While October experiences a significant amount of rainfall, measuring 143 mm (5.6 in) over 12 days, January is relatively drier with 80 mm (3.1 in) of precipitation over just 8 days. Additionally, January brings a higher humidity level of 84%, compared to October's 74%. For more detailed insights, check out Port Jefferson weather in January.
October and February present striking contrasts in weather. In October, temperatures range from a chilly minimum of 5°C (41°F) to a warm maximum of 29°C (84°F), with an average of 16°C (61°F). The month receives 143 mm (5.6 in) of precipitation over 12 days, accompanied by a humidity level of 74%. In sharp contrast, February features much colder temperatures, with a minimum of -15°C (6°F) and an average of only 2°C (36°F), peaking at a maximum of 15°C (58°F). The total precipitation is slightly lower at 112 mm (4.4 in) across the same number of rainy days, but humidity increases to 82%. For a more detailed insight into the winter conditions, check out Port Jefferson weather in February.
October and March showcase stark contrasts in weather patterns. October typically enjoys milder temperatures, with averages around 16°C (61°F) and a maximum of 29°C (84°F), while March struggles with chillier conditions, averaging only 4°C (40°F) and a potential low of -8°C (17°F). Precipitation is more frequent in October, with 143 mm (5.6 in) spread over 12 days, compared to March's 104 mm (4.1 in) over 10 days. Despite October's slightly lower humidity at 74%, March experiences higher humidity levels at 81%, contributing to a more frigid feel. For more details on the weather specifics in March, check out Port Jefferson weather in March.
In October, the weather is generally milder, with average temperatures ranging from a minimum of 5°C (41°F) to a maximum of 29°C (84°F), compared to April's cooler averages of -1°C (31°F) to 22°C (71°F). While both months experience about 12 days of precipitation, October receives slightly more rain overall, totaling 143 mm (5.6 in), whereas April has 132 mm (5.2 in). Additionally, October's humidity is slightly lower at 74% compared to April's 78%, contributing to a more comfortable feel during the fall. For those interested in specifics about April weather, you can explore Port Jefferson weather in April.
When comparing the weather in October and May, October tends to be slightly warmer overall, with average temperatures reaching 16°C (61°F) compared to May's average of 14°C (58°F). Additionally, October experiences a broader temperature range, with maximums peaking at 29°C (84°F), while May's maximum is 26°C (79°F). Precipitation levels are relatively similar, with October receiving 143 mm (5.6 in) over about 12 days and May having 119 mm (4.7 in) across 13 days. Humidity is also higher in October at 74%, compared to 69% in May. For more details on May weather, visit Port Jefferson weather in May.
Comparing the weather in October and June reveals several noteworthy differences. October typically sees cooler minimum temperatures, averaging around 5°C (41°F), while June starts off warmer with a minimum of about 10°C (50°F). The average temperature in June is also higher at 20°C (68°F) compared to October's 16°C (61°F). Both months can reach similar maximum temperatures, around 29°C (84°F in October and 85°F in June), but October experiences significantly more precipitation, with 143 mm (5.6 in) over 12 days compared to June's 87 mm (3.4 in) over 9 days. Additionally, October has a higher humidity level at 74%, while June is slightly lower at 69%. For a more detailed view of the June weather in Port Jefferson, you can visit Port Jefferson weather in June.
When comparing the weather in October and July, one can observe distinct differences in temperature and humidity levels. October tends to be cooler, with minimum temperatures dropping to 5°C (41°F) and an average of 16°C (61°F), while July experiences milder conditions, with minimums at 16°C (60°F) and an average of 24°C (76°F). Both months see a similar amount of precipitation—around 143 mm (5.6 inches) in October and 131 mm (5.2 inches) in July—but October is slightly wetter. Additionally, humidity is higher in October at 74%, compared to 62% in July. For more detailed insights into July's weather patterns, you can refer to Port Jefferson weather in July.
When comparing the weather in October and August, notable differences emerge. October experiences a broader temperature range, with minimums dipping to 5°C (41°F) and maximums reaching 29°C (84°F), resulting in an average temperature of 16°C (61°F). In contrast, August offers warmer conditions, characterized by an average temperature of 24°C (75°F), with minimums around 16°C (61°F) and maximums peaking at 31°C (88°F). Precipitation is also more frequent in October, totaling 143 mm (5.6 in) over 12 days, compared to August's 103 mm (4.0 in) over 11 days. Additionally, the humidity in October is higher at 74%, compared to 65% in August. For more detailed observations, you can check Port Jefferson weather in August.
October weather shows a notable shift compared to September, with lower minimum temperatures dropping to 5°C (41°F) and an average of 16°C (61°F), while September maintained a milder minimum of 11°C (52°F) and an average of 21°C (70°F). Despite a similar maximum temperature in both months, October experiences higher precipitation with 143 mm (5.6 in) over 12 days, compared to September's 94 mm (3.7 in) across 10 days. Additionally, October's humidity is slightly higher at 74%, compared to 68% in September. For more details on September weather, check Port Jefferson weather in September.
October and November showcase a notable shift in weather patterns. October typically experiences milder temperatures, ranging from a minimum of 5°C (41°F) to a maximum of 29°C (84°F), with an average of 16°C (61°F). In contrast, November brings cooler temperatures, with a minimum of -6°C (21°F) and an average of 9°C (49°F), peaking at 21°C (70°F). While October sees more precipitation over 12 days, with a total of 143 mm (5.6 in), November is slightly drier, accumulating 103 mm (4.0 in) over just 9 days. Additionally, humidity levels rise in November to 82%, compared to October's 74%. For more detailed information, you can refer to Port Jefferson weather in November.
October and December exhibit contrasting weather patterns. In October, temperatures range from a minimum of 5°C (41°F) to a pleasant maximum of 29°C (84°F), with an average of 16°C (61°F), making it a generally mild month. The precipitation totals around 143 mm (5.6 in) over 12 days, with humidity at 74%. Conversely, December sees much colder temperatures, with a minimum of -10°C (15°F) and a maximum of 17°C (62°F), averaging just 5°C (40°F). Precipitation slightly decreases to 140 mm (5.5 in) over 11 days, accompanied by a higher humidity of 80%. For more detailed insights into December weather, you can visit Port Jefferson weather in December.
As October unfolds in Port Jefferson, the transition to cooler days becomes evident, with average temperatures dropping noticeably compared to the warmer summer months. The weather is characterized by a significant increase in precipitation, bringing with it a cozy, autumnal atmosphere. Visitors can expect a blend of crisp air and the vibrant hues of fall, though the humidity remains fairly high, providing a unique dynamic to the region’s climate. This month serves as a gentle reminder of the seasonal shift, contrasting sharply with the heat and humidity of summer. For more details on how the climate evolves throughout the year, visit Port Jefferson Climate.