March Weather in Greenwich, United States

Last updated: February 24, 2025

March in Greenwich, United States, brings a dynamic shift in weather as temperatures transition from a chilly average of 5°C (41°F) to peaks of 24°C (76°F). As the month progresses, residents experience a striking range, with minimum temperatures dipping to -10°C (15°F). With precipitation totaling 93 mm (3.7 in) over 10 days, March is characterized by a high humidity level of 81%, contributing to a refreshing yet potentially unpredictable climate. This blend of warmth and moisture sets the stage for the vibrant spring ahead.

March Temperature in Greenwich

As March arrives in Greenwich, the lingering chill of winter begins to wane, ushering in a subtle, yet notable shift in temperatures. With minimums dipping to -10°C (15°F), the month starts off crisply cool. However, as spring approaches, the average temperature rises to a refreshing 5°C (41°F), and highs can soar to a delightful 24°C (76°F), marking the transition to warmer days. This upward trend from the colder February, which saw an average of 2°C (35°F), highlights March as a pivotal moment where winter yields to the promise of spring, setting the stage for a vibrant April with its further increases in warmth. The gradual ascent in temperatures fosters a sense of renewal and anticipation, reflecting nature's awakening and the end of winter's grasp.

March Weather in Greenwich: Daily Temperature Highs, Lows, and Averages

The chart illustrates March temperature patterns in Greenwich, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec333541506171777569594637
Data source: Temperature data for Greenwich generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

March Precipitation in Greenwich

March in Greenwich brings a moderate 93 mm (3.7 in) of precipitation, spread over approximately 10 days of rain. This amount showcases a slight decrease from the more substantial 101 mm (4.0 in) of rainfall in February, suggesting a gentle transition as winter melds into spring. Notably, while March experiences fewer precipitation days compared to February, it sets the stage for April's increase as rainfall rises to 114 mm (4.5 in) over 12 days. This gradual uptick in both precipitation and rainy days as the season progresses highlights a typical pattern of spring's emergence, promising the lush greenery that follows soon after.

March Precipitation Trends in Greenwich

The chart displays monthly precipitation patterns in Greenwich, with values for each month alongside March's data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how March's conditions compare to those of other months.
JanFebMarAprMayJunJulAugSepOctNovDec6910193114114911431239813286111
Data source: Precipitation data for March generated using information from the Copernicus Climate Change Service.
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March Humidity in Greenwich

In March, humidity in Greenwich, United States, hovers around 81%, marking a gradual decline from January's 84% and February's 82%. This slight decrease signals the onset of spring, as the region transitions toward warmer months. Notably, humidity continues to decrease in the following months, with April dropping to 78% and May reaching 69%. The trend highlights a clear seasonal shift, where the cooler, wetter winter months give way to the drier atmosphere of late spring and summer. As temperatures rise, the lingering humidity levels in March serve as a reminder of the winter's retreat, paving the way for sunnier, more comfortable days ahead.

March Average Humidity in Greenwich

This chart illustrates the average monthly humidity levels in Greenwich, with March's data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, allowing you to see how March's humidity levels compare to other months.
JanFebMarAprMayJunJulAugSepOctNovDec84%82%81%78%70%69%62%65%68%74%82%80%
Data source: Humidity data for March generated using information from the Copernicus Climate Change Service.

March UV Index in Greenwich

As March rolls into Greenwich, the UV Index marks a notable shift, rising to 6 and falling under the high exposure category. This increase from February's 5 signals a growing need for sun protection, with a burn time now reduced to just 25 minutes. It's a gentle reminder that while winter's chill may linger, the sun is re-emerging, intensifying its rays. Observing a trend from the beginning of the year, UV levels progressively climb, peaking dramatically in the following months, when summer arrives with an intense UV Index of 10. Being mindful of these changes is crucial for skin health; for more detailed information, check out the Greenwich UV Index.

Maximum UV Index Levels in Greenwich for March

The chart shows the monthly maximum UV Index (UVI) for Greenwich in March, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec35681010998642
Data source: Greenwich March UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

March Sunshine in Greenwich

As March dawns in Greenwich, the sunshine transforms the landscape, marking a significant leap from the colder months. With 252 hours of sunshine, March experiences a notable increase compared to January and February, when residents saw only 149 and 177 hours, respectively. This surge heralds the arrival of Spring, indicating longer days and vibrant blooms ahead. As the month progresses, the sunshine begins to set a trend that peaks in the summer months, with July shining brightest at 339 hours. This upward trajectory not only brings warmth but also energizes the community, inviting outdoor activities and celebrations after the stark winter. The gradual increase in sunlight throughout the year hints at the excellent weather to come, nurturing both the environment and the spirit of those enjoying it.

Monthly Sunshine Duration in Greenwich: March Highlighted

The March sunshine duration represents the total number of hours Greenwich experiences direct sunlight during the month of March, excluding cloudy or obstructed periods. This chart compares the sunshine duration of March with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec149h177h252h241h275h313h339h315h278h218h207h174h
Data source: Greenwich March Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Greenwich During March

March in Greenwich, United States, brings a notable shift in the forecast, with a 56% chance of sunny weather—the highest of the early year months. This increase is a welcome change following the 31% chance in February, hinting at the gradual arrival of spring. As the season progresses, March stands out not only for its potential sunlight but also for setting a more optimistic tone compared to the cold winter months. Following March, the chances dip again in April at 45%, suggesting that while the sun breaks through in March, the unpredictability of early spring weather still reigns. Overall, March marks a pivotal moment where the likelihood of sunshine aligns with the transition into warmer seasons, inviting residents to embrace the outdoors.

Percentage of Sunny Days in March in Greenwich

The chart illustrates the percentage of sunny days in Greenwich throughout the year, with March highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Greenwich experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec49%31%57%45%41%40%41%29%44%38%55%31%
Data source: Greenwich March chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Greenwich in March

As winter transitions into spring, March brings a noticeable increase in daylight duration in Greenwich, United States, with the day stretching to 11 hours—an hour more than February and signifying a shift towards longer, brighter days ahead. This upward trend continues into April, when daylight expands further to 13 hours, and peaks in the summer months, offering as much as 15 hours in June. The gradual increase from the 9 hours of daylight in January to the warmth of May's 14 hours highlights nature's awakening and sets the stage for a vibrant and lively season. As we approach summer, the rhythm of daylight becomes a reminder of the cycles of the year, with shorter days returning after the sun-soaked days of July and August.

Average Daylight Hours in Greenwich for March

The chart illustrates the variation in daylight duration in Greenwich throughout the year, with March highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 35m10h 38m11h 58m13h 20m14h 29m15h 4m14h 45m13h 43m12h 24m11h 3m9h 51m9h 15m
Data source: Greenwich daylight hours, calculated by summing the hours between sunrise and sunset for each day.

March Winds in Greenwich

March in Greenwich, United States, brings a gentle uplift in the wind's embrace, with an average speed of 3.6 m/s (8 mph). This slight increase from February's 3.3 m/s (7 mph) marks the transition into spring, where the breeze often carries the fresh promise of blooming flora and longer days. As winter wanes, the winds gradually shift, ushering in milder temperatures. Interestingly, while the wind speeds continue to taper off over the summer months, March stands out as a notable peak, hinting at the dynamic weather shifts typical of the season. The subsequent months tend to exhibit a downward trend, with average speeds dropping to a calm 2.4 m/s (5 mph) by August, highlighting the seasonal rhythm of Greenwich's winds.

Average March Wind Speed in Greenwich

The chart displays monthly wind speed patterns in Greenwich, with values for each month shown alongside March's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how March's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec3.53.33.6 m/s3.23.12.62.52.43.03.13.03.0
Data source: Greenwich March wind data, generated using information from the Copernicus Climate Change Service.

How March Weather in Greenwich Compares to Other Months

The weather in Greenwich changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of March'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.

In comparing the weather of January and March, we can see a significant shift in temperatures and conditions. January experiences colder temperatures, with a minimum of -18°C (0°F) and an average of 0°C (33°F), while March brings a milder climate, where the average temperature rises to 5°C (41°F) and can reach up to 24°C (76°F). The overall precipitation in March is higher at 93 mm (3.7 in) over 10 days compared to January's 69 mm (2.7 in) over 8 days, suggesting a wetter month as spring approaches. Additionally, humidity levels are slightly lower in March at 81% compared to 84% in January, indicating a more comfortable atmosphere as winter begins to relent. For more detailed information, you can check Greenwich weather in January.

March and February present a noticeable shift in weather patterns. In March, temperatures begin to rise, with a minimum of -10°C (15°F) and an average of 5°C (41°F), compared to February's colder min of -16°C (3°F) and average of 2°C (35°F). The maximum temperatures also increase, reaching up to 24°C (76°F) in March, while in February, the highs cap at 20°C (68°F). Interestingly, both months experience substantial precipitation, with March totaling 93 mm (3.7 in) over 10 days and February slightly higher at 101 mm (4.0 in) over 11 days. Humidity levels remain relatively stable, with March at 81% and February at 82%. For a more detailed overview of February weather, you can visit Greenwich weather in February.

March and April show notable differences in weather patterns, with April typically experiencing warmer temperatures. In March, the minimum temperature can dip as low as -10°C (15°F) and averages around 5°C (41°F), while April sees milder lows of -2°C (30°F) and an average of 10°C (51°F). The maximum temperatures also rise in April, reaching up to 27°C (81°F) compared to March's peak of 24°C (76°F). Precipitation is slightly higher in April at 114 mm (4.5 in) over 12 days, compared to March's 93 mm (3.7 in) over 10 days, although humidity remains relatively similar, at 81% for March and 78% for April. For more detailed weather insights, visit Greenwich weather in April.

March and May showcase a noticeable transition in weather patterns. In March, temperatures can drop to as low as -10°C (15°F) but can rise to a comfortable maximum of 24°C (76°F), with an average temperature of 5°C (41°F). The month experiences relatively high humidity at 81% and receives about 93 mm (3.7 in) of precipitation over 10 days. By contrast, May brings more temperate conditions, with minimums around 2°C (36°F) and maximums reaching 31°C (89°F), showcasing an average of 16°C (61°F). The precipitation increases slightly to 114 mm (4.5 in) across 12 days, but humidity levels drop to 69%. For more details on the weather in May, check out Greenwich weather in May.

March and June present strikingly different weather patterns. In March, temperatures can plummet as low as -10°C (15°F), with an average of 5°C (41°F) and peaks reaching 24°C (76°F), resulting in a chilly transition into spring. The month also sees significant precipitation, amounting to 93 mm (3.7 in) over about 10 days, coupled with higher humidity at 81%. In contrast, June ushers in warmer temperatures, with a minimum of 9°C (49°F), an average of 21°C (71°F), and highs soaring up to 34°C (93°F). The precipitation slightly decreases to 91 mm (3.6 in) over 12 days, and humidity drops to a more comfortable 69%. For a detailed look at weather specifics, consider checking Greenwich weather in June.

In March, temperatures range from a chilly -10°C (15°F) at their lowest to a pleasant 24°C (76°F) at their highest, with an average of around 5°C (41°F). The month experiences considerable precipitation, totaling 93 mm (3.7 in) over about 10 days, contributing to a humidity level of 81%. In stark contrast, July boasts much warmer temperatures, with a minimum of 16°C (60°F), an average of 25°C (77°F), and a peak reaching 35°C (96°F). Additionally, July experiences higher precipitation at 143 mm (5.6 in) over 13 days, but the humidity drops to a more comfortable 62%. For a detailed look at July's weather in Greenwich, visit Greenwich weather in July.

In March, temperatures can plunge as low as -10°C (15°F), with average highs only reaching around 5°C (41°F), making it a much chillier month compared to August, where temperatures start at a comfortable minimum of 15°C (59°F) and peak at a warm 34°C (93°F). March experiences a notable amount of precipitation, totaling 93 mm (3.7 in) over about 10 days, while August sees slightly higher total rainfall at 123 mm (4.8 in) over 14 days. Additionally, March's higher humidity level of 81% contrasts with the more moderate 65% humidity seen in August, which influences the overall comfort level during these two months. For more detailed insights into August weather, visit Greenwich weather in August.

March and September exhibit contrasting weather patterns, with March experiencing a wider range of temperatures, from a chilly -10°C (15°F) to a mild 24°C (76°F) and an average temperature of 5°C (41°F). The humidity in March is relatively high at 81%, accompanied by considerable precipitation of 93 mm (3.7 in) over about 10 days. In contrast, September enjoys warmer temperatures, with a minimum of 8°C (47°F) and a maximum of 33°C (91°F), averaging about 20°C (69°F). The humidity drops to 68%, and although precipitation is slightly higher at 98 mm (3.8 in), it occurs over just 9 days. For a more detailed insight into September weather trends, you can check Greenwich weather in September.

March and October present contrasting weather patterns. In March, temperatures can vary significantly, with a minimum of -10°C (15°F) and an average of 5°C (41°F), reaching up to a maximum of 24°C (76°F). The month sees approximately 93 mm (3.7 in) of precipitation over about 10 days, contributing to a higher humidity level of 81%. In stark comparison, October offers milder conditions, where temperatures range from a minimum of 3°C (38°F) to an average of 15°C (60°F), peaking at 32°C (90°F). The month experiences more precipitation at 132 mm (5.2 in) across 11 days, but with slightly lower humidity at 74%. For more specific details about the October climate, you can visit Greenwich weather in October.

Comparing the weather in March and November reveals some interesting similarities and differences. Both months experience a range of temperatures, with March averaging around 5°C (41°F) and November slightly warmer at 8°C (46°F). The maximum temperatures are quite similar as well, reaching up to 24°C (76°F) in March and 23°C (74°F) in November. Precipitation levels are relatively close, with March receiving 93 mm (3.7 in) over 10 days, while November has slightly less at 86 mm (3.4 in) over 9 days. Humidity levels are also comparable, with March at 81% and November at 82%. For more specific details about November weather, you can check out Greenwich weather in November.

When comparing the weather in March and December, we see notable differences in temperature and precipitation patterns. In March, temperatures range from a minimum of -10°C (15°F) to a maximum of 24°C (76°F), presenting a more diverse weather profile with an average of 5°C (41°F). The month also experiences 93 mm (3.7 in) of precipitation over about 10 days, coupled with a high humidity level of 81%. In contrast, December has slightly colder temperatures, with a minimum of -12°C (11°F) and a maximum of 17°C (63°F), averaging around 3°C (38°F). Precipitation is slightly higher at 111 mm (4.4 in) over 11 days, and humidity remains comparable at 80%. For a detailed look at December weather patterns, check out Greenwich weather in December.

Compare Greenwich's Climate with Cities Worldwide

Conclusion: What to Expect From March Weather in Greenwich

As winter gives way to spring, March in Greenwich brings a refreshing change with fluctuating temperatures and increased precipitation. While the average temperature begins to rise, the month can still swing dramatically from chilly nights to pleasantly warm afternoons, making it a transitional period for residents. With humidity levels remaining relatively high and about ten days of rain, March might feel unpredictable compared to the more stable temperatures of the upcoming months. This month sets the stage for a vibrant spring, so if you want to know more about how the climate evolves, check out Greenwich Climate.