Miami Weather in May
As spring progresses into May, the weather at Miami, Florida becomes noticeably hotter and wetter. But the month's climate is still mainly sunny with comparatively low humidity.
This page gives detailed information on the typical May temperature, precipitation, sun, humidity, wind and storms for Miami. The numbers here are historical averages based on climate data gathered at the Miami International Airport, located five miles west of downtown Miami.
Temperature
| 87 °F | May average high | 30 °C |
| 73 °F | May average low | 23 °C |
| 6 days | 90 °F max. or more (32 °C) |
| 5 days | 70 °F min. or less (21 °C) |
The temperature usually rises every day in May to over 80 degrees Fahrenheit (27 degrees Celsius) in Miami. Temperatures above 100 °F (38 °C) are not expected here this month.
About once a decade the thermometer dips to 60 °F (16 °C) or below in May, but it does not normally get as cold as 50 °F (10 °C).
Rain
| 6.3 in | total precipitation | 161 mm |
| 11 days | of rain |
Half the time, Miami receives 2.8 to 8.3 inches (70 to 211 mm) of rainfall in May. One in four years has drier weather, while another one in four is wetter.
Sun
| 72 % | sunshine |
| 6 days | clear skies |
The sun's rays reach the ground in Miami during 72 percent of daylight hours on average in May, for a total of 300 hours in the month. Typically on 6 days this month the sky is mainly clear, with at most 30 percent cloud cover.
Sunlight in May at Miami lasts for 13 hours and 24 minutes a day on average. The shortest day of the month is the 1st with 13 hours and 8 minutes of daylight. By the end of the month, the days have lengthened to 13:38 from sunrise to sunset. These durations can vary by a minute or two from year to year.
Humidity
| 72 % | May average humidity |
The relative humidity in Miami during May usually peaks at 83 percent in the morning then drops to 59 percent by early afternoon.
| Local Time | 1 am | 4 am | 7 am | 10 am | 1 pm | 4 pm | 7 pm | 10 pm | Humidity % | 79 | 83 | 81 | 64 | 59 | 62 | 69 | 75 |
Wind
| 9.5 mph | May wind speed average | 15.3 kph |
May is a little windier than most other months in Miami.
Storms
| 4 days | rainfall of 0.5 inches (13 mm) or more |
| 7 days | with thunderstorms in May |
Reference
The weather data here are long-term averages provided by the US National Centers for Environmental Information (NCEI). Temperature and precipitation are 1991-2020 normals while humidity and thunderstorms are 1961-1990 normals.