Last updated: February 24, 2025
July in Princeton, United States, brings a warm embrace with maximum temperatures soaring to 37°C (98°F) and an average of 26°C (78°F), while cooler evenings see lows around 13°C (56°F). Amidst this summer heat, the region experiences 139 mm (5.5 in) of rainfall over approximately 14 days, resulting in a humidity level of 62%. This blend of warmth and moisture paints a vivid picture of July's vibrant weather, ideal for both outdoor activities and exploring the lush surroundings.
In July, Princeton experiences its warmth at an average temperature of 26°C (78°F), making it a delightful summer month for residents and visitors alike. The temperatures typically range from a minimum of 13°C (56°F) to a maximum of 37°C (98°F), showcasing the peak of summer heat. This trend highlights a significant shift from the colder months, where temperatures can plummet, particularly in winter. As the warmest month of the year, July invites outdoor activities and vibrant community events, perfectly complementing its sunny disposition.
In July, Princeton experiences a notable peak in rainfall, with 139 mm (approximately 5.5 inches) of precipitation falling over 14 days—the highest monthly total of the year. This uptick in rainfall marks a continuation of the wetter trend observed from May through July, as the region transitions into summer. The increased precipitation in July not only contributes to the lush greenery around the area but also signifies a shift in weather patterns, as the month stands out with both the highest total rainfall and number of rainy days compared to the preceding months. Interestingly, this summer deluge sets the stage for August, which maintains a robust level of rainfall at 135 mm, suggesting that Princeton's humid summer weather is firmly established.
In July, Princeton, United States, experiences a noticeable shift in humidity, with levels dropping to 62%—the lowest of the year. This mid-summer respite follows a gradual decline from the high humidity of January at 84% to February's 82% and March's 81%. As the seasons transition from spring to summer, humidity consistently lessens, reaching 69% in both May and June. Though humidity starts to creep back up to 65% in August, July stands out as a peak of comfort, inviting residents and visitors alike to enjoy the warm, drier days. The overall trend highlights a significant moderation in moisture during this vibrant season, making July a prime time for outdoor activities in Princeton.
In July, Princeton experiences a sustained UV Index of 10, categorizing it as having a very high exposure risk, identical to the previous two months. With a burn time of just 15 minutes, it's crucial for residents and visitors to take protective measures when enjoying the summer sun. This month follows a clear upward trend from the moderation of January's UV Index of 3, rising steadily to the high levels that peak in mid-summer. Interestingly, the UV Index begins to decline in August, dropping to 9, reminding us that while summer is at its peak, the intensity of UV radiation is still a serious consideration for sun safety. For more detailed information, check out Princeton UV Index.
UV Risk Categories
In July, Princeton enjoys a radiant burst of sunshine, totaling 349 hours, marking it as the sunniest month of the year. This peak follows a steady increase in daylight hours, beginning with 147 hours in January and gradually climbing to June's impressive 315 hours. The trend reveals a warm crescendo as the summer days stretch, creating the perfect backdrop for outdoor activities and community gatherings. As August approaches, the sun remains generous with 312 hours, but we can see a slight decline as the year transitions into fall, where daylight hours begin to taper off. This consistent rise and gentle fall not only highlight July's shining brilliance but also frame the seasonal cycle that defines Princeton’s charming climate.
In Princeton, July boasts a 45% chance of sunny weather, aligning closely with the findings from earlier months like January and April, where the likelihood of sunshine hovers similarly. Notably, while July experiences a moderate amount of sun, it falls short compared to the brighter expectations of spring, as exemplified by the peak 56% in March. As summer progresses into August, the chance of sun dips to 30%, indicating a potential trend towards cloudier weather. Overall, July maintains a balanced sun factor, making it a viable option for outdoor activities, though not quite as reliable as other times of the year.
In Princeton, United States, the month of July offers an enticing continuation of long summer days with 14 hours of daylight, a peak that begins in May. As spring gives way to summer, daylight gradually increases, reaching its zenith in July before beginning a subtle decline. Interestingly, the daylight duration remains consistent throughout June and July, hinting at an enjoyable balance of light and warmth. Following this vibrant peak, the daylight begins to taper off in August, signaling the onset of autumn with 13 hours of daylight. This yearly rhythm highlights a clear seasonal transition in Princeton, where each month offers a unique blend of daylight, encouraging residents to relish every moment of the sun-filled days.
In Princeton during July, the winds tend to be at their calmest, with an average speed of just 2.3 m/s (5 mph). This marked dip follows a mild breeze seen in previous months, particularly May and June, where the speeds hovered around 3.0 m/s to 3.3 m/s. Interestingly, July ties with August as the most tranquil month of the year, showcasing a notable drop compared to the breezier early spring months. As summer reaches its peak, residents and visitors may find the soft, warm air more inviting, with the gentle winds providing a refreshing respite under the sun's warmth. Overall, July contributes to a consistent trend of lower wind speeds during the heart of summer in Princeton, creating a serene atmosphere perfect for outdoor activities.
The weather in Princeton changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of July's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Princeton and find detailed weather information for every month.
In comparing the weather of July and January, a stark contrast emerges. July boasts much warmer temperatures, with a minimum of 13°C (56°F) and an average high of 26°C (78°F), stretching up to a scorching maximum of 37°C (98°F). This summer month also experiences significant rainfall, averaging 139 mm (5.5 in) over 14 days and maintaining a humidity level of 62%.
In sharp contrast, January features frigid conditions, with temperatures plunging as low as -17°C (2°F) and averaging merely 2°C (35°F). The maximum temperature barely reaches 20°C (68°F), and the month sees considerably less precipitation at 64 mm (2.5 in) over just 8 days, accompanied by a high humidity level of 84%. For more detailed insights on January weather, see Princeton weather in January.
July and February present stark contrasts in weather. In July, temperatures range from a mild minimum of 13°C (56°F) to a scorching maximum of 37°C (98°F), with an average temperature of 26°C (78°F). Despite the warmth, July sees significant precipitation, totaling 139 mm (5.5 inches) over approximately 14 days, all while humidity levels hover around 62%.
In stark contrast, February features much colder conditions, with temperatures dipping to a frigid minimum of -16°C (4°F) and reaching an average of just 3°C (38°F). The maximum temperature in February is a pleasant 26°C (79°F), yet this only occurs on warmer days. The month has slightly lower precipitation than July, totaling 109 mm (4.3 inches) over 11 days, but humidity is higher at 82%.
For a deeper insight into February weather patterns, you can check Princeton weather in February.
July and March present contrasting weather profiles characterized by significant differences in temperature and humidity. In July, temperatures range from a minimum of 13°C (56°F) to a scorching maximum of 37°C (98°F), with an average of 26°C (78°F). The month sees high humidity levels of 62% and considerable rainfall, with precipitation totaling 139 mm (5.5 in) over 14 days. In stark contrast, March experiences much cooler temperatures, with a minimum of -12°C (10°F) and a maximum of 28°C (83°F), resulting in an average of just 6°C (43°F). While March has slightly less precipitation at 109 mm (4.3 in) over 10 days, the humidity is notably higher at 81%. For more details on March weather in this region, you can check Princeton weather in March.
In comparing the weather in July and April, it's evident that July is significantly warmer, with average temperatures reaching 26°C (78°F) and maximums soaring up to 37°C (98°F), whereas April has a cooler average of 12°C (54°F) and a maximum of 31°C (88°F). Additionally, July experiences higher humidity at 62%, compared to April’s 78%, which can make the heat feel more intense. Despite July being rainier with 139 mm (5.5 in) of precipitation over 14 days, April also sees considerable rainfall at 106 mm (4.2 in) over 12 days. For a more detailed look at April's weather patterns, you can explore Princeton weather in April.
July weather is characterized by significantly warmer temperatures compared to May, with averages around 26°C (78°F) and highs reaching up to 37°C (98°F). In contrast, May sees a much cooler average temperature of 17°C (63°F) and a maximum of 35°C (94°F). Both months experience a similar amount of precipitation, with July recording 139 mm (5.5 in) over 14 days, while May has 131 mm (5.1 in) over 13 days. Additionally, July's humidity is slightly lower at 62% compared to May's 69%, making July feel a bit more comfortable despite higher temperatures. For more detailed information, you can check out Princeton weather in May.
In comparing the weather of July and June, July typically experiences warmer temperatures, with an average of 26°C (78°F) compared to June's 22°C (73°F). While both months have similar maximum temperatures, July's minimum temperature is noticeably higher at 13°C (56°F) versus June's 9°C (48°F). Additionally, July receives more precipitation, totaling 139 mm (5.5 in) over 14 days, in contrast to June's 100 mm (3.9 in) over 12 days. Despite being rainier, July has a lower humidity level of 62%, compared to June’s 69%, which may contribute to a more comfortable feel during warm days. For more detailed insights, you can explore Princeton weather in June.
In July, the weather tends to be warmer, with average temperatures reaching up to 26°C (78°F) and a maximum of 37°C (98°F). This month also sees notable precipitation, with 139 mm (5.5 in) falling over 14 days, along with a humidity level of 62%. In contrast, August brings slightly cooler conditions with an average temperature of 24°C (76°F) and a maximum of 35°C (96°F). Precipitation in August is slightly lower at 135 mm (5.3 in) over the same number of days, while humidity increases to 65%. For a detailed look at August weather specifics, you can visit Princeton weather in August.
In comparing the weather between July and September, we notice a significant shift in temperatures and precipitation patterns. July experiences a warmer climate with an average temperature of 26°C (78°F), peaking at a high of 37°C (98°F), while September cools down to an average of 21°C (70°F) and a maximum of 35°C (95°F). Precipitation in July is notably higher at 139 mm (5.5 in) over 14 days, compared to September's 87 mm (3.4 in) across 10 days. Additionally, while humidity in July is around 62%, September sees a slight increase to 68%, indicating a more humid atmosphere as summer transitions to fall. For a detailed look at September weather, you can check out Princeton weather in September.
In July, the weather is typically warm, with average temperatures around 26°C (78°F) and maximums reaching as high as 37°C (98°F), accompanied by significant humidity levels at 62%. This month also experiences considerable rainfall, with around 139 mm (5.5 in) spread over 14 days. In contrast, October brings cooler temperatures, with averages dropping to 16°C (61°F) and minimums plummeting to 1°C (34°F). Although precipitation is slightly less at 121 mm (4.8 in) over about 10 days, the humidity rises to 74%, giving October a different, brisk feel. For more details on October weather in Princeton, you can visit Princeton weather in October.
July and November present striking contrasts in weather. July features a warm average temperature of 26°C (78°F), peaking at a scorching 37°C (98°F), while November’s average drops significantly to just 8°C (46°F), with a maximum of 25°C (77°F). The summer month experiences a higher precipitation level of 139 mm (5.5 in) over 14 days, indicating a more humid atmosphere with 62% humidity. In contrast, November sees less rainfall at 83 mm (3.3 in) over 9 days, but the humidity rises to 82%, adding to the chill in the air. For a closer look at November weather patterns, you can explore Princeton weather in November.
July and December exhibit stark contrasts in weather, reflecting the extremes of summer and winter. July welcomes warm temperatures, with averages around 26°C (78°F) and maximums soaring to 37°C (98°F), while December brings a chill, with average temperatures dropping to a mere 4°C (39°F) and minimums plummeting to -12°C (11°F). Precipitation is more frequent in July, occurring on 14 days and totaling 139 mm (5.5 in), compared to December's 104 mm (4.1 in) over just 10 days. Additionally, December's humidity is notably higher at 80%, compared to July's 62%. For further insights on December weather, visit Princeton weather in December.
In July, Princeton experiences a notable shift in weather compared to other months, with warmer temperatures and higher humidity levels that create a sultry atmosphere. This month often brings intense heat, peaking with maximums around 37°C, while the consistent warmth keeps average daytime temperatures near a pleasant 26°C. However, this summer month also exhibits a propensity for rain, seeing about 14 days of precipitation totaling 139 mm, which adds a refreshing contrast to the blazing sun. The blend of warmth and humidity not only invigorates the lush surroundings but also makes July an unforgettable time to experience the dynamic Princeton Climate. For more insights into the region's weather patterns, visit Princeton Climate.