March Weather in Key West, United States

Last updated: February 24, 2025

March weather in Key West, United States showcases a delightful transition into spring, with temperatures ranging from a comfortable 17°C (62°F) to a maximum of 26°C (80°F). The average temperature sits at a pleasant 23°C (74°F), offering ideal conditions for outdoor activities. While the month receives an average of 18 mm (0.7 in) of precipitation over just four days, the humidity remains relatively high at 76%, creating a tropical atmosphere. This combination of warm temperatures and occasional light rainfall makes March an inviting time to explore the vibrant beauty of Key West.

March Temperature in Key West

As March unfolds in Key West, temperatures enjoy a pleasant upswing, with minimums averaging around 17°C (62°F) while averages stabilize at 23°C (74°F), peaking at a delightful 26°C (80°F). This marks a gentle transition from the cooler winter months, as visitors can bask in increasingly mild and comfortable conditions. Trend-wise, the weather in March is characterized by consistently warm days, making it an ideal time to explore the vibrant outdoors before the heat intensifies in April. With its milder evenings, March invites both relaxation and adventure, setting the perfect stage for memorable sunsets and balmy strolls along the coast.

March Weather in Key West: Daily Temperature Highs, Lows, and Averages

The chart illustrates March temperature patterns in Key West, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec717374777982838482817774
Data source: Temperature data for Key West 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 Key West

In March, Key West experiences a noticeable dip in precipitation, with only 18 mm (0.7 in) of rainfall over about 4 days—the least amount recorded since January and February. This trend marks a shift as the area transitions from the drier winter months towards the more humid spring and summer seasons. With rainfall increasing significantly in April to 40 mm (1.6 in) and continuing to rise through May, the early signs of the wet season beckon. March's relatively mild precipitation creates an inviting atmosphere for visitors to explore the island, making it the perfect time to enjoy the picturesque beaches before the heavier rains set in.

March Precipitation Trends in Key West

The chart displays monthly precipitation patterns in Key West, 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.
JanFebMarAprMayJunJulAugSepOctNovDec27271840139941031001721338344
Data source: Precipitation data for March generated using information from the Copernicus Climate Change Service.
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March Humidity in Key West

As March unfolds in Key West, the humidity begins to gently decline, averaging 76%, a subtle dip from the 79% of February. This descent marks the transition into spring, where the air feels increasingly comfortable, paving the way for pleasant outdoor activities. Following March, humidity levels continue to trend downward, reaching their lowest point in June at 69%. The gradual decrease from the winter months showcases Key West's shifting climate, making this a prime time for visitors to enjoy the sun-soaked beaches and vibrant local culture without the heavy humidity of summer. As the seasons progress, one can look forward to warm days balanced by refreshing sea breezes.

March Average Humidity in Key West

This chart illustrates the average monthly humidity levels in Key West, 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.
JanFebMarAprMayJunJulAugSepOctNovDec81%80%76%73%71%70%70%72%76%79%80%81%
Data source: Humidity data for March generated using information from the Copernicus Climate Change Service.

March UV Index in Key West

As spring approaches in Key West, the UV Index soars to 11 in March, categorizing it as extreme and significantly reducing the safe burn time to just 10 minutes. This marks a notable increase from the previous months, where the index stood at 9 in February and 7 in January, highlighting the rapid escalation of sun exposure risk as the month unfolds. With summer on the horizon, patterns predict a continued trend of extreme UV levels, reaching their peak in June. Visitors and locals alike should prepare for this intense sun exposure by taking precautions and enjoying the beautiful Florida sunshine safely. More details on UV levels can be found here: Key West UV Index.

Maximum UV Index Levels in Key West for March

The chart shows the monthly maximum UV Index (UVI) for Key West 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.
JanFebMarAprMayJunJulAugSepOctNovDec79111212131212111086
Data source: Key West 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 Key West

March in Key West marks the beginning of a sun-soaked transition into spring, boasting an impressive 333 hours of sunshine. This delightful month showcases a notable increase from February's 286 hours, making it an ideal time for outdoor activities and exploration. As the days grow longer and warmer, it’s no surprise that the sunshine continues to climb in the months ahead, peaking in July with 351 hours. March not only sets the stage for this gradual rise but also invites visitors to bask in its vibrant atmosphere before the summer heat fully arrives. Whether wandering the lively streets or relaxing by the stunning shoreline, the abundance of sunlight enhances every experience in this tropical paradise.

Monthly Sunshine Duration in Key West: March Highlighted

The March sunshine duration represents the total number of hours Key West 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.
JanFebMarAprMayJunJulAugSepOctNovDec228h286h333h340h335h323h351h340h320h305h286h288h
Data source: Key West March Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Key West During March

As March rolls into Key West, the likelihood of basking in sunny weather peaks at an impressive 72%, making it one of the sunniest months of the year. This favorable trend builds upon the solid 68% chance of sunshine in February and holds its ground with a higher probability than the following month, April, which sees a drop to 64%. March's radiant conditions serve as a delightful prelude to spring, inviting both locals and visitors to revel in outdoor activities. While the summer months plummet to a mere 21% and 40%, March remains a prime time to soak up the sun in this tropical paradise.

Percentage of Sunny Days in March in Key West

The chart illustrates the percentage of sunny days in Key West 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 Key West experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec43%68%72%64%58%21%40%28%36%49%50%73%
Data source: Key West March chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Key West in March

As March unfolds in Key West, the island enjoys an inviting 12 hours of daylight, marking a significant increase from the 11 hours of February. This upward trend in daylight hours highlights the transition to spring, inviting both locals and visitors to bask in the sun's warmth. Following March, the daylight duration plateaus at 12 hours in April before increasing again in May to 13 hours, setting the stage for vibrant summer days. The gradual progression through shorter winter days to longer, sunnier spring and summer highlights Key West's appeal, making it a perfect escape for those seeking sunshine and outdoor adventures.

Average Daylight Hours in Key West for March

The chart illustrates the variation in daylight duration in Key West throughout the year, with March highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec10h 47m11h 19m12h 1m12h 44m13h 20m13h 37m13h 27m12h 56m12h 15m11h 32m10h 55m10h 37m
Data source: Key West daylight hours, calculated by summing the hours between sunrise and sunset for each day.

March Winds in Key West

In March, Key West experiences a delightful uptick in wind speed, averaging 6.8 m/s (15 mph), making it one of the breeziest months of the year. This invigorating wind signals the transition from cooler winter months, where winds hover around 5.6 m/s (13 mph) in January and 6.1 m/s (14 mph) in February, to a more dynamic spring climate. Despite a slight decline in April and May, where winds decrease to 6.0 m/s (14 mph) and 6.1 m/s (14 mph) respectively, March stands out as a pivotal time when the refreshing breezes invigorate the island atmosphere. As summer approaches, wind speeds begin to taper off, hinting at a seasonal change, yet March remains a favorite for those looking to bask in the lively charm of the island's springtime winds.

Average March Wind Speed in Key West

The chart displays monthly wind speed patterns in Key West, 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.
JanFebMarAprMayJunJulAugSepOctNovDec5.66.16.8 m/s6.06.15.84.75.63.65.36.35.5
Data source: Key West March wind data, generated using information from the Copernicus Climate Change Service.

How March Weather in Key West Compares to Other Months

The weather in Key West 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 Key West and find detailed weather information for every month.

In comparison to January, March in Key West experiences slightly warmer temperatures, with a minimum of 17°C (62°F) compared to January's 12°C (55°F). Both months have a maximum temperature of 26°C (80°F), but March boasts a higher average of 23°C (74°F), making it feel a bit more pleasant overall. Precipitation is lower in March at 18 mm (0.7 in) over 4 days, while January sees more rain, totaling 27 mm (1.1 in) across 5 days. Humidity levels also drop slightly in March to 76%, compared to January's 81%. For more detailed information about January weather, check out Key West weather in January.

In comparing the weather between February and March, it is evident that both months share similar average temperatures, with March experiencing a slightly higher minimum temperature of 17°C (62°F) compared to February's 14°C (58°F). However, February sees more precipitation, with 27 mm (1.1 in) compared to March's 18 mm (0.7 in), despite both months having rain on four days. Humidity levels remain quite close, with February at 79% and March at 76%. For more detailed insights, you can check out the Key West weather in February.

March and April weather shows a noticeable warming trend as spring progresses. In March, temperatures range from a minimum of 17°C (62°F) to a maximum of 26°C (80°F), with an average of 23°C (74°F). The month experiences relatively low precipitation, totaling 18 mm (0.7 in) over just four days, coupled with a humidity level of 76%.

By April, the temperatures rise slightly, with a minimum of 19°C (67°F) and a maximum of 29°C (84°F), leading to an average of 25°C (77°F). However, rainfall increases significantly, with 40 mm (1.6 in) of precipitation recorded over seven days, while humidity slightly decreases to 73%. For more detailed information, you can check out Key West weather in April.

When comparing March and May weather, March typically enjoys milder temperatures with a minimum of 17°C (62°F) and an average of 23°C (74°F), peaking at a maximum of 26°C (80°F). It experiences relatively low precipitation at 18 mm (0.7 in) over just 4 days, coupled with higher humidity at 76%. In contrast, May sees warmer conditions with a minimum of 22°C (72°F), average temperatures around 26°C (79°F), and a maximum of 29°C (84°F). However, it has significantly higher precipitation, totaling 139 mm (5.5 in) over 11 days, with slightly lower humidity at 71%. For more details on the climate specifics of May, you can refer to Key West weather in May.

In March, Key West experiences mild temperatures, with a minimum of 17°C (62°F) and a maximum reaching 26°C (80°F), while the average temperature sits at around 23°C (74°F). This month sees relatively light precipitation, totaling 18 mm (0.7 in) over just 4 days and a humidity level of 76%. In contrast, June offers a warmer climate with minimum temperatures of 24°C (76°F) and maximums hitting 30°C (87°F), averaging at 28°C (82°F). However, June is notably wetter, with 94 mm (3.7 in) of precipitation spread across 14 days, accompanied by lower humidity at 69%. For more details on the June weather in Key West, you can visit Key West weather in June.

In March, the weather is pleasantly mild, with average temperatures ranging from a minimum of 17°C (62°F) to a maximum of 26°C (80°F). The humidity is relatively high at 76%, but overall, there is less rain, averaging just 18 mm over four days. In contrast, July brings significantly warmer temperatures, with averages between 25°C (78°F) and 30°C (87°F). However, this month also sees increased rainfall, with about 103 mm of precipitation over 15 days and lower humidity at 70%. For more details on July weather, you can check out Key West weather in July.

When comparing the weather in March and August, it's clear that August experiences warmer temperatures, with a minimum of 25°C (78°F) and an average of 29°C (84°F), compared to March's milder minimum of 17°C (62°F) and average of 23°C (74°F). Additionally, August tends to be wetter, receiving about 100 mm (3.9 in) of precipitation over 15 days, whereas March has only 18 mm (0.7 in) over just 4 days. Humidity levels are relatively similar, with March at 76% and August slightly lower at 72%. For a more detailed look at the weather patterns, check out Key West weather in August.

March and September in Key West showcase distinct weather patterns. In March, temperatures are more moderate, with a minimum of 17°C (62°F) and a maximum of 26°C (80°F), while precipitation is relatively low at 18 mm (0.7 in) over just 4 days. In contrast, September experiences warmer temperatures, with a minimum of 25°C (77°F) and a maximum of 30°C (86°F), and significantly higher rainfall totaling 172 mm (6.8 in) across 17 days. Despite both months having a humidity level of 76%, September's weather is characterized by notable heat and increased precipitation. For more detailed insights, check out the link for Key West weather in September.

March offers mild temperatures with a minimum of 17°C (62°F) and an average of 23°C (74°F), peaking at 26°C (80°F). The month is relatively dry, receiving only 18 mm (0.7 in) of precipitation over about 4 days, and humidity levels sit at 76%. In contrast, October sees warmer conditions with a minimum temperature of 20°C (69°F) and an average of 27°C (81°F), reaching a maximum of 29°C (85°F). However, it experiences significantly more rainfall, totaling 133 mm (5.2 in) across 18 days, and humidity climbs slightly to 79%. For a closer look at the specific weather conditions in October, check out Key West weather in October.

March and November in Key West showcase a shift in weather patterns. March typically enjoys warmer temperatures, with a minimum of 17°C (62°F) and an average of 23°C (74°F), while November sees slightly higher lows, starting at 18°C (65°F) and averaging 25°C (77°F). However, March is generally drier, with only 18 mm (0.7 in) of precipitation over about 4 days, compared to November, which experiences significantly more rainfall at 83 mm (3.3 in) spread over 10 days. Both months feature high humidity levels, with March at 76% and November slightly higher at 80%. For more details on November weather, you can visit Key West weather in November.

In March, the weather in Key West features a comfortable range of temperatures, with a minimum of 17°C (62°F) and a maximum of 26°C (80°F), resulting in an average temperature of 23°C (74°F). This month experiences relatively low precipitation, totaling 18 mm (0.7 in) over about 4 days, and humidity levels average around 76%.

In contrast, December sees slightly cooler temperatures, with a minimum of 15°C (59°F) and a maximum of 27°C (80°F), while maintaining the same average temperature of 23°C (74°F). However, December is wetter, with 44 mm (1.7 in) of precipitation spread over 5 days and higher humidity at 81%. For more detailed information, visit Key West weather in December.

Compare Key West's Climate with Cities Worldwide

Conclusion: What to Expect From March Weather in Key West

March in Key West offers a delightful transition into spring, with mild temperatures and relatively low precipitation, making it an ideal time for outdoor activities. The warmth starts to increase compared to the cooler winter months, fostering a pleasant atmosphere that invites exploration of the island's scenic beauty. Humidity trends slightly higher than in winter, yet it remains comfortable, ensuring that visitors can fully enjoy the locality's vibrant culture without the oppressive heat of summer. For those curious about the broader patterns in this tropical paradise, a deeper dive into the climate can be found here: Key West Climate.