Last updated: February 24, 2025
In January, Greenwich, United States experiences a wide range of temperatures, with a maximum reaching up to 18°C (64°F) and a minimum plummeting to -18°C (0°F). The month typically sees an average temperature around 0°C (33°F), presenting a chilly yet varied climate. With precipitation measuring 69 mm (2.7 in) over approximately 8 days, the air remains quite humid, averaging 84%, which can make the cold feel even more biting. This mix of weather conditions paints a picture of a brisk, wintry month ideal for those who appreciate the beauty of a frosty landscape.
In Greenwich, United States, January marks a month of stark contrasts, with temperatures ranging from a bone-chilling -18°C (0°F) at their lowest to a surprisingly mild 18°C (64°F) at their peak. The average temperature hovers around 0°C (33°F), making it one of the coldest months of the year. As the winter chill settles in, a gradual warming trend is noticeable when comparing January to the following month, February, where both minimums and maximums start to rise. Interestingly, the average temperature sees only a slight uptick to 2°C (35°F) in February but hints at warmer days ahead as spring approaches. The overall trajectory through the winter gives way to the promise of milder temperatures by March, encouraging a sense of optimism as nature begins to awaken from its deep freeze. With each passing month, Greenwich experiences a significant transition, illustrating the dynamic seasonal shifts that define its climate.
In January, Greenwich experiences moderate precipitation, with 69 mm (2.7 in) recorded over approximately 8 days. This marks a shift from the wetter months preceding it, where February sees a significant increase to 101 mm (4.0 in) spread across 11 days. After January, the trend of increasing rainfall continues as spring approaches, with April and May each receiving 114 mm (4.5 in), highlighting a period of increased moisture. Interestingly, the warmer summer months, particularly July and August, exhibit the highest precipitation levels, peaking at 143 mm (5.6 in) and 123 mm (4.8 in) respectively. As the year progresses into fall, precipitation begins to taper off, showcasing a dynamic pattern of rainfall that reflects seasonal transitions in this picturesque region of the United States.
In January, Greenwich experiences a high degree of humidity at 84%, setting the tone for the month. This elevated humidity gradually decreases throughout the winter, with February and March settling around 82% and 81%, respectively. As spring approaches, the moisture in the air diminishes further, dropping to 78% in April, before tumbling down to a more comfortable 69% by May and June. The trend continues into the summer months, where July sees humidity at its lowest at 62%, creating a refreshing contrast to the earlier part of the year. However, humidity begins to rise again in late summer and fall, reaching 74% by October and peaking at 82% in November, before tapering off in December to 80%. This cyclical pattern highlights how Greenwich transitions from a humid winter into a drier summer, only to see levels climb once more as the year winds down.
In January, Greenwich experiences a moderate UV Index of 3, indicating that while sun exposure can lead to a burn in about 30 minutes, it’s generally safe to enjoy outdoor activities with some sun protection. As the month transitions into February, the UV Index rises to 5, maintaining the moderate category but reminding residents to be aware of their sun exposure. This upward trend continues as spring approaches, with March seeing a jump to a high UV Index of 6, reducing safe burn time to just 25 minutes. The intensity peaks in the summer months, reaching very high levels of 10 in both May and June, where even short sun exposure can result in burns. Interestingly, the fall months see a decrease to 4 in November and a low of 2 in December, allowing for longer sun exposure intervals, up to 45 minutes in the latter month. For detailed insights on UV levels throughout the year, visit Greenwich UV Index.
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In Greenwich, United States, the January sunshine breaks the winter chill with a modest 149 hours of sunlight, setting the stage for gradually increasing light in the following months. As February arrives, sunny days begin to bloom, expanding to 177 hours, hinting at the awakening of spring. By March, daylight flourishes with 252 hours, propelling Greenwich into a vibrant April with 241 hours that beckons outdoor activities. The sunlight peaks in June with an impressive 313 hours, ushering in the height of summer, while July surpasses this with 339 hours of golden rays. As summer wanes, the shine begins to mellow, with hours gently descending to 315 in August and 278 in September, illustrating the seasonal shift. As the year concludes, daylight dwindles to 174 hours in December, reminding residents of the cyclical dance of the seasons and the warmth that January sunshine promises to return.
In January, Greenwich, United States, experiences a 49% chance of sunny weather, marking it as one of the brighter months of winter. While this probability is relatively favorable compared to the upcoming February, which plummets to 31%, it shows a noticeable uptick when stacked against the more overcast months that follow. As the seasons transition, March sees a promising rise to 56%, suggesting the return of sunnier days, while April and May waver around the mid-40s. This pattern indicates a gradual return to brighter skies as winter comes to a close, making January a noteworthy month for those hoping to catch some sun before the spring bloom.
In January, daylight in Greenwich, United States, spans a modest 9 hours, marking the depths of winter. As the month progresses into February, there’s a slight increase to 10 hours, hinting at the longer days to come. March ushers in 11 hours of daylight, a sign of spring’s approach. The trend continues upward through April and May, where daylight stretches to 13 and 14 hours, respectively, showcasing nature's awakening. By June, summer peaks with an impressive 15 hours of daylight, providing ample time for outdoor activities. However, as July fades into August, the daylight begins to wane slightly, with 14 and 13 hours respectively. The descent continues into the fall, with September offering 12 hours and October slightly less at 11 hours. Finally, the year wraps up with the return to 9 hours of daylight in both November and December, closing the cycle of the seasons. This rhythmic ebb and flow of daylight not only marks the passage of time but also reflects the changes in mood and activity levels experienced throughout the year.
In Greenwich, United States, January welcomes brisk air with an average wind speed of 3.5 m/s (8 mph), setting the stage for a subtle decline as winter progresses. Throughout the early months of the year, a slight dip in wind speed can be observed, with February averaging 3.3 m/s (7 mph) and March edging back up to 3.6 m/s (8 mph). As spring unfolds, wind speeds taper further, reaching their lowest in the summer months, with July and August seeing gentle breezes of just 2.5 m/s (6 mph) and 2.4 m/s (5 mph), respectively. A resurgence occurs in the fall, bringing back more invigorating winds around 3.0–3.1 m/s (7 mph), leading to a dynamic seasonal rhythm that captures the changing character of Greenwich's weather.
The weather in Greenwich changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of January's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Greenwich and find detailed weather information for every month.
January and February present a similar cold climate, but February experiences slightly milder conditions overall. January's temperatures range from a minimum of -18°C (0°F) to a maximum of 18°C (64°F), with an average of 0°C (33°F). In contrast, February sees temperatures ranging from -16°C (3°F) to 20°C (68°F), with an average rising to 2°C (35°F). While January has 69 mm (2.7 in) of precipitation over 8 days, February receives more precipitation at 101 mm (4.0 in) across 11 days. Humidity levels remain relatively close, with January at 84% and February slightly lower at 82%. For more detailed information, you can view the Greenwich weather in February.
In January, temperatures can plummet to a minimum of -18°C (0°F), with an average of 0°C (33°F) and a maximum of 18°C (64°F). The month experiences about 69 mm (2.7 in) of precipitation over roughly 8 days, coupled with high humidity at 84%. In contrast, March sees a milder climate with minimum temperatures reaching -10°C (15°F), an average of 5°C (41°F), and a maximum of 24°C (76°F). This month brings slightly more precipitation at 93 mm (3.7 in) over about 10 days, and the humidity decreases slightly to 81%. For more detailed insights on March weather, check out Greenwich weather in March.
January and April present contrasting weather conditions. In January, temperatures can plummet to a minimum of -18°C (0°F), with an average around 0°C (33°F) and a maximum reaching 18°C (64°F). The month experiences a significant amount of precipitation, totaling 69 mm (2.7 in) over about 8 days, accompanied by relatively high humidity at 84%. In contrast, April brings a milder climate with temperatures ranging from a minimum of -2°C (30°F) to an average of 10°C (51°F), peaking at 27°C (81°F). This month also sees an increase in precipitation, totaling 114 mm (4.5 in) over approximately 12 days, while the humidity slightly decreases to 78%. To explore more about the weather in Greenwich during April, you can check out this link: Greenwich weather in April.
In January, the weather is characterized by frigid temperatures, with a minimum of -18°C (0°F) and an average of 0°C (33°F), making it one of the coldest months of the year. The humidity level is high at 84%, contributing to the chilly feel, while precipitation occurs on about 8 days, totaling 69 mm (2.7 in). In contrast, May brings a significant warming trend, with temperatures ranging from a minimum of 2°C (36°F) to a maximum of 31°C (89°F) and an average of 16°C (61°F). Although May has slightly more precipitation at 114 mm (4.5 in) and rain on about 12 days, the humidity is lower at 69%, creating a much more pleasant atmosphere. For more detailed insights on May weather, you can check Greenwich weather in May.
In January, the weather is quite severe, with temperatures plunging to a minimum of -18°C (0°F) and averaging around 0°C (33°F). The month experiences significant precipitation, amounting to 69 mm (2.7 in) over approximately 8 days, coupled with a high humidity level of 84%. In stark contrast, June brings milder and more pleasant conditions, with temperatures ranging from a minimum of 9°C (49°F) to a maximum of 34°C (93°F) and averaging 21°C (71°F). While June sees slightly more precipitation at 91 mm (3.6 in) over 12 days, the humidity drops to 69%, creating a comfortable atmosphere. For more details on June conditions, check out Greenwich weather in June.
January and July present starkly contrasting weather conditions. In January, temperatures can plummet to a chilling -18°C (0°F), with an average hovering around 0°C (33°F) and a maximum of 18°C (64°F). This winter month experiences high humidity levels at 84% and sees about 69 mm (2.7 in) of precipitation over 8 days. In sharp contrast, July boasts a much milder climate, with minimum temperatures around 16°C (60°F), averages of 25°C (77°F), and maximums reaching up to 35°C (96°F). The summer month has lower humidity at 62% and receives more precipitation, totaling 143 mm (5.6 in) over approximately 13 days. For more detailed information, check out Greenwich weather in July.
In January, temperatures can plunge as low as -18°C (0°F), with an average of around 0°C (33°F) and occasional highs reaching 18°C (64°F). The month experiences significant precipitation, totaling 69 mm (2.7 in) across about eight days, combined with high humidity levels averaging 84%. In contrast, August brings warmer temperatures, with a minimum of 15°C (59°F) and an average of 24°C (75°F), peaking at 34°C (93°F). Although August is typically warmer, it also sees increased precipitation, amounting to 123 mm (4.8 in) over approximately 14 days, along with lower humidity at around 65%. For more detailed information, you can check Greenwich weather in August.
January and September present stark contrasts in weather conditions. In January, temperatures can plummet to a frigid -18°C (0°F), with an average of 0°C (33°F) and a maximum reaching 18°C (64°F). The month is characterized by high humidity at 84% and relatively low precipitation, totaling 69 mm (2.7 in) over 8 days. In contrast, September brings a much milder climate, with minimum temperatures around 8°C (47°F) and an average of 20°C (69°F), peaking at 33°C (91°F). Although it experiences slightly more rainfall at 98 mm (3.8 in) over 9 days, the humidity is notably lower at 68%. For more information on specific weather patterns during this month, visit Greenwich weather in September.
In January, the weather is characterized by frigid temperatures, with a minimum reaching as low as -18°C (0°F) and an average around freezing at 0°C (33°F). The month experiences significant humidity levels at 84% and receives about 69 mm (2.7 in) of precipitation over approximately 8 days. In stark contrast, October showcases a much warmer climate, with minimum temperatures of 3°C (38°F) and an average of 15°C (60°F), peaking at a maximum of 32°C (90°F). October also sees increased rainfall, totaling 132 mm (5.2 in) over about 11 days, but with lower humidity levels at 74%. For more detailed insights on October weather, check out Greenwich weather in October.
When comparing the weather in January and November, notable differences emerge. January typically experiences much colder temperatures, with minimums plunging to -18°C (0°F) and an average around 0°C (33°F). In contrast, November enjoys milder conditions, featuring a minimum of -9°C (15°F) and an average of 8°C (46°F). Precipitation in November is slightly higher, with 86 mm (3.4 in) across 9 days, compared to January's 69 mm (2.7 in) over 8 days. Humidity levels are similar in both months, with January at 84% and November at 82%. For more specific details on weather trends, you can check Greenwich weather in November.
January's weather is generally colder than December's, with average temperatures ranging from a minimum of -18°C (0°F) to a maximum of 18°C (64°F), compared to December's milder range of -12°C (11°F) to 17°C (63°F). Precipitation is lower in January, amounting to 69 mm (2.7 in) over 8 days, while December experiences more rainfall at 111 mm (4.4 in) across 11 days. Additionally, January has slightly higher humidity at 84%, compared to December's 80%. For a more detailed overview of December weather in Greenwich, you can check Greenwich weather in December.
In January, Greenwich experiences a stark contrast to the mildness of other months, with temperatures dipping to their coldest levels of the year. While winter’s chill can bring maximums of 18°C on the rare sunny day, most of the month is defined by freezing averages near 0°C and occasional lows that plunge well below zero. Coupled with higher humidity levels at 84% and precipitation occurring over roughly a third of the month, January embodies the heart of winter with its brisk winds and damp conditions. For a broader understanding of the climate patterns throughout the year, check out Greenwich Climate.