March Weather in Southampton, United Kingdom

Last updated: March 17, 2025

March in Southampton, United Kingdom presents a dynamic blend of weather patterns, showcasing a maximum temperature of 20°C (68°F) while averaging around 8°C (46°F). As winter transitions to spring, temperatures can plummet to a minimum of -6°C (22°F), highlighting the variability of the season. Precipitation is also notable, with a total of 67 mm (2.6 in) falling across 13 days, contributing to the city's characteristic 86% humidity. This mix of warmth, cool breezes, and rain defines March as a month of refreshing change, perfect for enjoying the early blooms and vibrant atmosphere of Southampton.

March Temperature in Southampton

As March unfolds in Southampton, temperatures begin to show the first hints of spring, transitioning from the winter chill. The month sees a minimum temperature of -6°C (22°F), while the average nudges up to a refreshing 8°C (46°F), and daytime highs can reach an inviting 20°C (68°F). This rise marks a notable shift from the colder months preceding it, with March offering a more temperate climate that encourages outdoor activities. With average highs increasing significantly compared to January and February, March serves as a reminder of the warmer days to come, making it an appealing time for both locals and visitors to enjoy the blooming landscapes and vibrant atmosphere of the city.

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

The chart illustrates March temperature patterns in Southampton, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec414346495561656359534744
Data source: Temperature data for Southampton generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

March Precipitation in Southampton

March in Southampton ushers in a notable increase in precipitation, with 67 mm (2.6 in) of rain falling over an average of 13 days. This marks a rise from the wetter winter months of January and February, reflecting a trend toward spring's variable weather. With rainfall peaking as spring approaches, March experiences a significant boost in both rainfall volume and rainy days, setting the stage for the lush blooms that characterize the season. This uptick hints at nature's awakening, as April's drier conditions follow, emphasizing the fluctuating patterns of precipitation that Southampton regularly witnesses.

March Precipitation Trends in Southampton

The chart displays monthly precipitation patterns in Southampton, 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.
JanFebMarAprMayJunJulAugSepOctNovDec5260673970835871471036593
Data source: Precipitation data for March generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

March Humidity in Southampton

In March, humidity in Southampton, United Kingdom, tends to decline to 86%, marking a subtle shift from the highs of January and February when levels hovered around 91% and 89% respectively. This gradual decrease indicates the onset of spring, as the air begins to feel fresher and less saturated. Following March, humidity continues to trend downwards, reaching its lowest point in July at 71% before gradually rising again in the autumn months. Overall, March serves as a pivotal month in Southampton's humidity cycle, offering a glimpse of the transitioning weather patterns that shape the region throughout the year.

March Average Humidity in Southampton

This chart illustrates the average monthly humidity levels in Southampton, 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.
JanFebMarAprMayJunJulAugSepOctNovDec91%89%86%85%79%81%71%76%82%91%92%92%
Data source: Humidity data for March generated using information from the Copernicus Climate Change Service.

March UV Index in Southampton

As March unfolds in Southampton, United Kingdom, the UV Index rises to 4, marking a noticeable shift from the previous months. This moderate level of exposure indicates that while sun protection is not yet a top priority, a burn time of just 30 minutes means it's time to start thinking about skin care during outdoor activities. Compared to the preceding winter months, where the UV Index lingered at a low 1 and 2, March's increase signals the approach of spring and more sunlight. Keep an eye out for trends as April's UV Index jumps to 6, reflecting the intensifying sun’s strength. For more information on the UV Index and how to stay safe in the sun, check out Southampton UV Index.

Maximum UV Index Levels in Southampton for March

The chart shows the monthly maximum UV Index (UVI) for Southampton 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.
JanFebMarAprMayJunJulAugSepOctNovDec124678876421
Data source: Southampton 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 Southampton

March in Southampton heralds the arrival of longer, sunnier days, breaking away from the winter gloom with an impressive 193 hours of sunshine. This marks a significant increase from January's mere 98 hours and February's 138 hours, signaling a delightful transition into spring. As residents shake off the chill, March sets the stage for an exuberant April, which boasts even more sunshine at 316 hours. This upward trend continues into the warmer months, peaking in July with 395 hours, and offers a stunning contrast to the drizzles that dominate the later autumn months. Overall, March serves as a vibrant reminder of the seasonal shift, inviting everyone in Southampton to embrace the sun-filled days ahead.

Monthly Sunshine Duration in Southampton: March Highlighted

The March sunshine duration represents the total number of hours Southampton 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.
JanFebMarAprMayJunJulAugSepOctNovDec98h138h193h316h384h373h395h354h287h233h141h108h
Data source: Southampton March Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Southampton During March

As March unfolds in Southampton, the likelihood of sunny weather begins to brighten the outlook, with a 33% chance of sunshine, a notable increase from the previous winter months. This trend signals a gradual transition towards spring, as the probabilities for sunlight rise significantly in April, reaching 55%—a stark contrast to the dreary 22% in January. While March still lingers in the cooler season, its relatively higher sunshine potential hints at the longer, more vibrant days that await. Interestingly, although May boasts a 36% chance of sunshine, it isn't quite as favorable as the peak of April, suggesting that early spring may offer more delightful sunny spells than later in the season. The data collectively illustrates a clear upward trajectory, with each month moving toward sunnier days as the year progresses.

Percentage of Sunny Days in March in Southampton

The chart illustrates the percentage of sunny days in Southampton 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 Southampton experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec22%25%33%55%36%29%38%28%30%27%34%21%
Data source: Southampton March chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Southampton in March

As March rolls into Southampton, a noticeable shift in daylight duration marks the approach of spring. With 11 hours of daylight, March serves as a bridge between the winter's shorter days and the longer, sun-drenched hours that follow in April, which boasts 13 hours. This gradual increase in daylight not only brightens the landscape but also uplifts spirits, hinting at the warmer months ahead. As nature awakens, each passing day brings an extra hour of light, fostering a sense of renewal and anticipation. The steady climb from January's 8 hours to March's 11 reflects a comforting rhythm of seasonal change, signaling that brighter days are just around the corner.

Average Daylight Hours in Southampton for March

The chart illustrates the variation in daylight duration in Southampton throughout the year, with March highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec8h 28m10h 1m11h 55m13h 52m15h 33m16h 26m15h 58m14h 27m12h 34m10h 38m8h 54m7h 59m
Data source: Southampton daylight hours, calculated by summing the hours between sunrise and sunset for each day.

March Winds in Southampton

March in Southampton brings a refreshing breeze with an average wind speed of 4.5 m/s (10 mph), slightly lower than February's gusts but on par with May's winds. This transitional month marks a shift from winter’s briskness, as the winter months of January and February exhibit higher winds of 4.6 m/s and 5.2 m/s, respectively. As spring unfolds, the winds gradually ease, dipping to their lowest in April at 3.4 m/s (8 mph). This pattern suggests a seasonal trend where early months showcase stronger winds, while warmer months tend to bring a quieter atmosphere, ideal for enjoying the burgeoning signs of spring. Embracing March's winds prepares Southampton’s residents for the gentle, calming shifts ahead.

Average March Wind Speed in Southampton

The chart displays monthly wind speed patterns in Southampton, 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.
JanFebMarAprMayJunJulAugSepOctNovDec4.65.24.5 m/s3.44.53.23.43.83.54.53.84.6
Data source: Southampton March wind data, generated using information from the Copernicus Climate Change Service.

How March Weather in Southampton Compares to Other Months

The weather in Southampton 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 Southampton and find detailed weather information for every month.

In comparing the weather between March and January, March generally presents a milder climate with an average temperature of 8°C (46°F) compared to January’s cooler average of 5°C (42°F). While both months experience low temperatures, January’s minimum of -3°C (27°F) is slightly warmer than March’s -6°C (22°F). March also sees more variability in temperatures, with a maximum of 20°C (68°F), whereas January peaks at 14°C (57°F). In terms of precipitation, March has a slightly higher total of 67 mm (2.6 in) over 13 days, compared to January's 52 mm (2.1 in) across 10 days. Humidity levels are fairly high in both months, with March at 86% and January slightly higher at 91%. For more detailed insights, you can check Southampton weather in January.

When comparing the weather in March and February, March tends to be slightly warmer with an average temperature of 8°C (46°F) compared to February's average of 6°C (44°F). Both months experience minimum temperatures around -6°C (22°F) to -6°C (21°F), but March can reach a higher maximum temperature of 20°C (68°F), whereas February peaks at 16°C (62°F). In terms of precipitation, March records a bit more with 67 mm (2.6 in) over 13 days, compared to February's 60 mm (2.4 in) over 11 days. Humidity levels remain relatively high in both months, with March at 86% and February at 89%. For more detailed information on February's weather, you can visit Southampton weather in February.

March and April display a notable shift in weather conditions. In March, the temperatures range from a chilly minimum of -6°C (22°F) to a maximum of 20°C (68°F), with an average temperature of 8°C (46°F). This month also experiences more precipitation, totaling 67 mm (2.6 in) over 13 days, coupled with a higher humidity level of 86%.

In contrast, April brings milder temperatures with a minimum of -3°C (27°F) and a maximum of 24°C (76°F), leading to a more pleasant average of 10°C (49°F). Rainfall decreases significantly to 39 mm (1.5 in) over just 7 days, while humidity remains relatively stable at 85%. Overall, April offers a welcome transition, with warmer and drier weather compared to March. For more specifics about the weather in April, you can visit Southampton weather in April.

March and May present quite a contrast in weather conditions. In March, temperatures can range from a chilly -6°C (22°F) at night to a mild 20°C (68°F) during the day, with an average temperature of 8°C (46°F). This month experiences significant precipitation, totaling 67 mm (2.6 in) over approximately 13 days, coupled with high humidity at 86%. In comparison, May offers a more pleasant climate with minimum temperatures of 1°C (33°F) and maximums reaching 25°C (77°F), averaging around 13°C (55°F). Though May sees slightly more rainfall at 70 mm (2.8 in) over just 10 days, the humidity is lower at 79%, making for a more enjoyable outdoor experience. For more detailed insights, check out Southampton weather in May.

March and June present notably different weather patterns. In March, temperatures range from a chilly minimum of -6°C (22°F) to a pleasant maximum of 20°C (68°F), with an average of 8°C (46°F). The month sees a fair amount of precipitation, totaling 67 mm (2.6 in) over 13 days, and high humidity at 86%. In contrast, June experiences milder temperatures with a minimum of 6°C (43°F) and a maximum of 30°C (87°F), averaging 16°C (61°F). Although June has slightly more precipitation at 83 mm (3.3 in), it falls over fewer days (10), with humidity reduced to 80%. For more insights on June weather specifics, check Southampton weather in June.

March and July present distinctly different weather patterns. In March, temperatures range from a chilly minimum of -6°C (22°F) to an average of 8°C (46°F), peaking at 20°C (68°F). The month tends to be quite humid, with an average humidity of 86% and precipitation occurring on 13 days, totaling 67 mm (2.6 in). In contrast, July warms up considerably, with a minimum temperature of 7°C (46°F), an average of 18°C (65°F), and a maximum reaching 31°C (88°F). This summer month sees less humidity at 71% and slightly lower precipitation of 58 mm (2.3 in) over 11 days. For more detailed insights into July's weather, visit Southampton weather in July.

March and August exhibit distinct contrasts in weather patterns. In March, temperatures range from a chilly minimum of -6°C (22°F) to a pleasant maximum of 20°C (68°F), with an average temperature of 8°C (46°F). The month is characterized by higher humidity at 86% and receives around 67 mm (2.6 in) of precipitation across 13 days. In contrast, August experiences milder temperatures, with a minimum of 7°C (45°F) and a maximum reaching up to 31°C (89°F), resulting in an average temperature of 17°C (63°F). Precipitation increases slightly to 71 mm (2.8 in), occurring over 12 days, while humidity levels drop to 76%. For more detailed information, check Southampton weather in August.

The weather in March and September shows a notable contrast, particularly in temperature and precipitation levels. March typically experiences colder temperatures, with a minimum of -6°C (22°F) and an average of 8°C (46°F), whereas September's temperatures are milder, ranging from a minimum of 3°C (37°F) to an average of 15°C (59°F). Additionally, September boasts warmer maximum temperatures of up to 28°C (82°F), in stark contrast to March's maximum of 20°C (68°F). Precipitation is also less frequent in September, with only 47 mm (1.9 in) over 9 days, compared to March's 67 mm (2.6 in) over 13 days. Humidity levels show only a slight difference, with March at 86% and September at 82%. For more specific details, you can check out Southampton weather in September.

March and October exhibit distinct weather patterns, reflecting the transition between winter and autumn. In March, temperatures range from a chilly -6°C (22°F) at night to a mild 20°C (68°F) during the day, with an average of 8°C (46°F). This month sees around 67 mm (2.6 in) of precipitation over approximately 13 days and maintains a high humidity level of 86%. In contrast, October features slightly warmer temperatures, with a minimum of 0°C (32°F) and a maximum of 21°C (71°F), averaging 12°C (54°F). However, it experiences more substantial rainfall, totaling 103 mm (4.1 in) over the same number of rainy days, and a humidity level of 90%. For those interested in detailed October weather patterns, visit Southampton weather in October.

March and November exhibit some notable similarities and differences in weather patterns. In March, temperatures range from a minimum of -6°C (22°F) to a maximum of 20°C (68°F), with an average temperature of 8°C (46°F). The month typically experiences approximately 67 mm (2.6 in) of precipitation over about 13 days, accompanied by a humidity level of 86%. In contrast, November features milder temperatures, with a minimum of -2°C (28°F) and a maximum of 16°C (61°F), also averaging 8°C (47°F). Precipitation in November is slightly lower at 65 mm (2.6 in), spread across around 11 days, and the humidity rises to 92%. Both months contribute to a wet climate, but November tends to be more humid and has a narrower temperature range. For more specific details, you can refer to Southampton weather in November.

When comparing the weather in March and December, both months exhibit chilly temperatures, but March tends to be slightly warmer overall. In March, temperatures range from a minimum of -6°C (22°F) to a maximum of 20°C (68°F), averaging around 8°C (46°F). In contrast, December's temperatures fluctuate between -3°C (27°F) and 14°C (58°F), with an average of 7°C (45°F). Additionally, December experiences more precipitation at 93 mm (3.7 in) compared to March's 67 mm (2.6 in), even though both months have precipitation on approximately 13 days. Humidity levels are also higher in December at 92%, compared to 86% in March. For a more detailed look at December weather, you can check Southampton weather in December.

Compare Southampton's Climate with Cities Worldwide

Conclusion: What to Expect From March Weather in Southampton

As March unfolds in Southampton, the weather begins to transition from the cold grip of winter to the more temperate days of spring. While temperatures can still dip to chilly lows, the maximums reach a mild 20°C, offering a refreshing contrast. This month is characterized by significant humidity levels at 86%, creating a damp feel, especially during the 13 days of precipitation, which collectively contributes to a total of 67 mm of rainfall. Unlike the preceding months, March invites blossoms and budding life, making it a month of change and renewal. For detailed insights into how the weather patterns continue to evolve, visit Southampton Climate.