Climate and monthly weather forecast
Randolph, NJ

Randolph, New Jersey, USA is classified under the Köppen climate classification as Cfa, denoting a humid subtropical climate with no dry season. This geographical location experiences varied weather conditions throughout the year, presenting a significant range in temperature and adequate precipitation in every month.

Throughout the year in Randolph, temperature fluctuations are noticeable. From a typical high in the 82°F (27.8°C) territory during the height of summer (July) to a chilly low of 17°F (-8.3°C) expected in the coldest part of winter (January), drastic changes occur. In relation to precipitation, averages range from at a moderate 3.2" (81mm) in February to a high of 5.1" (130mm) in September. Equally important is the daylight hours, it swings from a minimum duration of 9.3 hours in December to a generous 15.1 hours during June.

Remarkably, there is no month in Randolph without significant rainfall. The wettest period is September with a substantial average of 5.1" (130mm), while February records the lowest rainfall at 3.2" (81mm). The hottest month usually is July with an average high of 82°F (27.8°C), whereas January is the coldest with temperatures dipping to a low average of 17°F (-8.3°C).

Considering the climate data at hand, the best time to visit Randolph would be during the late spring to the early summer months. From April to June, daily high temperatures are mild and comfortable, averaging between 60°F (15.6°C) and 77°F (25°C). Rainfall remains relatively consistent during this period, ranging from 4.5" (114mm) to 4.8" (122mm). Most notably, daylight hours are extensive during these months, with June boasting the longest duration of 15.1 hours.

In contrast, the worst time to visit Randolph would likely be the winter period, notably from December through February. During this period, temperatures drop significantly with average lows spanning from 17°F (-8.3°C) to 22°F (-5.6°C) and highs between 36°F (2.2°C) and 49°F (9.4°C). While precipitation is lower in winter compared to other seasons, daylight hours are also at their shortest, with December having a minimum of 9.3 daylight hours.

Spring fast tracks a progression in temperature in Randolph from the cold winter months. High temperatures elevate from 49°F (9.4°C) in March to 70°F (21.1°C) in May, while lows rise from 26°F (-3.3°C) in March to 45°F (7.2°C) in May. Rainfall during spring is reasonably steady, with values extending within the bounds of 4.2" (107mm) to 4.9" (124mm). Daylight hours increase significantly from 12 hours in March to 14.5 hours in May, providing ample time for outdoor activities.

Summer in Randolph brings warmer temperatures, with average highs in the 70°F (21.1°C) to 82°F (27.8°C) range. Late evenings also stay warm with lows hovering from 54°F (12.2°C) to 59°F (15°C). Rainfall is consistent in this period, with averages remaining between 4.8" (122mm) and 5" (127mm). June presents the longest daylight duration of 15.1 hours, although July follows closely with 14.8 hours.

Autumn witnesses a gradual cooling down of temperatures in Randolph. Highs plunge from 72°F (22.2°C) in September to 52°F (11.1°C) in November. Correspondingly, lows drop from a mild 50°F (10°C) in September to a cooler 31°F (-0.6°C) in November. Rainfall remains relatively unchanged, ranging within a tight band of 4.1" (104mm) to 5.1" (130mm). Meanwhile, daylight hours shorten from 12.5 hours in September to 9.9 hours in November.

Winter brings the coldest conditions to Randolph. Average highs plummet to between 36°F (2.2°C) and 49°F (9.4°C), while average lows descend into the harsh zone of 17°F (-8.3°C) to 26°F (-3.3°C). Though winter brings comparatively lower rainfall volumes, standing within the 4.1" (104mm) to 4.3" (109mm) range, it is accompanied by the shortest daylight hours, dipping to 9.3 hours in December.

Randolph, New Jersey, ushers in the new year with a generally cold and wet climate. January is the coldest month of the entire calendar year, with temperatures hitting an average minimum of 17°F (-8.3°C), setting the overall tone for the weather in this part of the Garden State. Weather in January »

February in Randolph carries forward January's cold streak, albeit with a slight upward tilt in temperatures. One observes an increase in daylight hours to 10.7. February marks the end of the intense winter phase, paving the way for a transition with the onset of spring. Weather in February »

March witnesses the exit of winter and the emergence of warmer days in Randolph. A distinct feature of March is the significant jump in the average high temperature from 40°F (4.4°C) in February to 49°F (9.4°C). The longer daylight hours, counted to be around 12, begin to manifest, creating a more pleasant environment that encourages outdoor activities. Weather in March »

April's weather becomes friendlier than any previous month this year in Randolph. Temperatures climb further up from the March averages, indicating the welcome arrival of spring. The mild climate and increased daylight make concerts in the park and family picnics common sights during this month. Weather in April »

In May, one starts to feel the warmth of summer in Randolph, New Jersey, as the temperatures reach an average high of 70°F (21.1°C). The blossoming of flowers and the chirping of birds echo the mood of the weather, bringing life and energy to the city. Weather in May »

June serves as the harbinger of summer in Randolph, consistently displaying warmth and fostering outdoor fun. The shift from the mildness of May to the heat of June is evident and welcomed, marking the beginning of beach trips and barbecues. Weather in June »

July is defined by the peak of summer in Randolph, with an impressive average maximum temperature of 82°F (27.8°C). This significant increase in warmth, coupled with longer daylight hours, defines the zenith of the summer season. Weather in July »

August in Randolph seems to dial back the heat a bit, with temperatures slightly lower than the July high, allowing for a gentle reprieve. Residents continue to make the most of the summer weather, enjoying the last sultry days. Weather in August »

September rings in a noticeable change, welcoming cooler fall temperatures to Randolph. There is an evident dip in temperature from the August average high, with values now down to around 72°F (22.2°C). The fall foliage starts to make an appearance towards the end of the month, coloring the city in vibrant hues. Weather in September »

October's weather continues the transition started by September, ushering in more of the cooler autumn temperatures. The falling leaves and moderate temperatures make October an ideal month for outdoor activities such as nature walks and bonfires. Weather in October »

November sees a more rapid descent in temperatures, with the average high now displayed as 52°F (11.1°C). The transition towards the colder end of the spectrum becomes more noticeable. The bright autumn leaves start to thin, revealing the stark branches beneath. Weather in November »

December paints a wintry scene in Randolph, New Jersey, plunging to colder temperatures, averaging a high of 41°F (5°C). The shorter daylight hours, down to 9.3, contribute to the stark, winter canvas. The sight of snow-covered streets becomes a common sight once again, and residents prepare for the holiday season. Weather in December »