Contents
- Weather in May
- Frequently asked questions
- Average temperature in May
- Average pressure in May
- Average wind speed in May
- Average humidity in May
- Average rainfall in May
- Average rainfall days in May
- Average daylight in May
- Average sunshine in May
- Average sunshine days in May
- Average UV index in May
- Average cloud cover in May
- Average visibility in May
May
Weather in May
Temperature
The initiation of May records an average high-temperature of a still tropical 32.1°C (89.8°F), displaying a near consistency with the previous month. In May, the nighttime temperature lowers to an average of 22.2°C (72°F).Heat index
In May, the average heat index is appraised at an extremely hot 43°C (109.4°F). Remain alert: Heat exhaustion and heat cramps are predicted. Extended effort can lead to heatstroke.In terms of the heat index, values are set with light wind and shade conditions in mind. If directly exposed to the sun, the heat index could rise by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', represents the fusion of temperature and moisture in the air to suggest how warm it feels. The effect is personal, with varied weather perceptions among individuals due to differences in body mass, stature, and physical activity. It is essential to realize that direct sunlight can escalate the perceived temperature, increasing the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Juveniles often do not understand the need to recuperate and rehydrate. Thirst is a delayed symptom of dehydration - hence, it is vital to maintain hydration, particularly during ongoing physical activities.
To combat high temperatures, the human body perspires and relies on sweat evaporation for cooling. With higher relative humidity, the rate of evaporation is reduced, resulting in increased heat retention in the body compared to drier air. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.
Humidity
In San Francisco Lempa, the average relative humidity in May is 75%.Rainfall
The month with the most rainfall is May, when the rain falls for 25.4 days and typically aggregates up to 242mm (9.53") of precipitation.Daylight
In San Francisco Lempa, the average length of the day in May is 12h and 47min.On the first day of May, sunrise is at 05:33 and sunset at 18:12. On the last day of the month, sunrise is at 05:26 and sunset at 18:20 CST.
Sunshine
In May, the average sunshine is 10.7h.UV index
February through May, with an average maximum UV index of 7, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high health hazard from unsafe exposure to UV radiation for average individuals.Note: The maximum daily UV index of 7 during May translates into the following directions:
Ward off overexposure. Defence against solar harm is crucial. UV radiation from the Sun is most intense between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. Tightly woven clothing, when worn loosely, shields effectively against the Sun.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot does it get in May?
What is the average humidity in May?
What is the wettest month?
How much does it rain in May?
How many hours of daylight does San Francisco Lempa have in May?
When are sunrise and sunset in May?
How many hours of sunshine does San Francisco Lempa have in May?
What is the month with the highest UV index in San Francisco Lempa?
How high is the UV index in May?
Average temperature in May
San Francisco Lempa, El Salvador
- Average high temperature in May: 32.1°C
The warmest month (with the highest average high temperature) is March (34.1°C).
The month with the lowest average high temperature is October (29.6°C).
- Average low temperature in May: 22.2°C
The month with the highest average low temperature is April (22.3°C).
The coldest month (with the lowest average low temperature) is December (18.6°C).
Average pressure in May
San Francisco Lempa, El Salvador
- Average pressure in May: 1011.4mbar
The month with the highest atmospheric pressure is January (1013.7mbar).
The months with the lowest atmospheric pressure are May and October (1011.4mbar).
Average wind speed in May
San Francisco Lempa, El Salvador
- Average wind speed in May: 4.4km/h
The windiest month (with the highest average wind speed) is January (7.5km/h).
The calmest month (with the lowest average wind speed) is June (4.2km/h).
Average humidity in May
San Francisco Lempa, El Salvador
- Average humidity in May: 75%
The month with the highest relative humidity is October (83%).
The month with the lowest relative humidity is March (59%).
Average rainfall in May
San Francisco Lempa, El Salvador
- Average rainfall in May: 242mm
The wettest month (with the highest rainfall) is May (242mm).
The driest month (with the least rainfall) is January (1mm).
Average rainfall days in May
San Francisco Lempa, El Salvador
- Average rainfall days in May: 25.4 days
The month with the highest number of rainy days is September (27.5 days).
The month with the least rainy days is January (1.5 days).
Average daylight in May /
Average sunshine in May
San Francisco Lempa, El Salvador
- Average daylight in May: 12h and 5min
The month with the longest days is June (Average daylight: 12h and 54min).
The month with the shortest days is December (Average daylight: 11h and 18min).
- Average sunshine in May: 10h and 4min
The month with the most sunshine is April (Average sunshine: 11h and 24min).
The months with the least sunshine are January and December (Average sunshine: 7h and 42min).
Average sunshine days in May
San Francisco Lempa, El Salvador
- Average sunshine days in May: 4.1 days
The month with the most sunshine days is January (29 days).
The month with the least sunshine days is September (1.3 days).
Average UV index in May
San Francisco Lempa, El Salvador
- Average UV index in May: 7
The months with the highest UV index are February, March, April and May (UV index 7).
The months with the lowest UV index are January, June, July, August, September, October, November and December (UV index 6).
Average cloud cover in May
San Francisco Lempa, El Salvador
- Average cloud cover in May: 37
The month with the most cloud cover is September (Cloud cover 44).
The months with the least cloud cover are January and December (Cloud cover 14).
Average visibility in May
San Francisco Lempa, El Salvador
- Average visibility in May: 9km
The months with the highest visibility are January, February, March, April and December (10km).
The month with the lowest visibility is September (7km).
