Contents
- Weather in April
- Frequently asked questions
- Average temperature in April
- Average pressure in April
- Average wind speed in April
- Average humidity in April
- Average rainfall in April
- Average rainfall days in April
- Average daylight in April
- Average sunshine in April
- Average sunshine days in April
- Average UV index in April
- Average cloud cover in April
- Average visibility in April
April
Weather in April
Temperature
San Francisco Lempa greets April with an average high-temperature of a still hot 33.8°C (92.8°F), marking a slight deviation from the preceding month. During April, San Francisco Lempa experiences an average low-temperature of 22.3°C (72.1°F) at night.Heat index
The heat index in April is appraised at a blistering 43°C (109.4°F). Stay alert: Heat cramps and heat exhaustion are expected. Heatstroke is a likely outcome of ongoing activity.Records show heat index calculations are tailored for shaded regions and mild winds. A direct sunlight exposure may boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', reflects the feeling of heat when considering both air temperature and humidity. The effect is experienced differently by individuals, hinging on unique characteristics such as body mass, stature, and level of activity. Under direct sun rays, the felt temperature might be heightened, with the heat index increasing by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
To cool down, the human body relies on perspiration, a process where excessive heat is eliminated as sweat evaporates. Elevated relative humidity diminishes evaporation, thereby reducing the body's ability to shed heat and creating a feeling of being too warm. Rising body temperatures due to excess heat retention could signify impending heat disorders.
Humidity
In April, the average relative humidity is 64%.Rainfall
In San Francisco Lempa, in April, it is raining for 14.1 days, with typically 36mm (1.42") of accumulated precipitation. Throughout the year, there are 192.2 rainfall days, and 1062mm (41.81") of precipitation is accumulated.Daylight
The average length of the day in April is 12h and 28min.On the first day of the month, sunrise is at 05:51 and sunset at 18:08. On the last day of April, in San Francisco Lempa, El Salvador, sunrise is at 05:34 and sunset at 18:12 CST.
Sunshine
The month with the most sunshine is April, with an average of 11.4h of sunshine.UV index
The months with the highest UV index are February through May, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health hazard from unprotected exposure to Sun's UV rays for the average person.Note: The UV index of 7 during April translates into the following guidance:
Implement precautions and maintain sun safety methods. Avoidance of sunburn is demanded. Avoid direct Sun exposure and seek shade from 10 a.m. to 4 p.m., the period of highest UV radiation. Remember, however, that not all shade structures offer full protection. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is it in April?
What is the average humidity in April?
How many days does it rain in April?
How many hours of daylight does San Francisco Lempa have in April?
When are sunrise and sunset in April?
What month has the most sunshine?
How many hours of sunshine does San Francisco Lempa have in April?
What are the months with the highest UV index in San Francisco Lempa?
What is the UV index intensity in April?
Average temperature in April
San Francisco Lempa, El Salvador
- Average high temperature in April: 33.8°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 April: 22.3°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 April
San Francisco Lempa, El Salvador
- Average pressure in April: 1011.7mbar
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 April
San Francisco Lempa, El Salvador
- Average wind speed in April: 5.1km/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 April
San Francisco Lempa, El Salvador
- Average humidity in April: 64%
The month with the highest relative humidity is October (83%).
The month with the lowest relative humidity is March (59%).
Average rainfall in April
San Francisco Lempa, El Salvador
- Average rainfall in April: 36mm
The wettest month (with the highest rainfall) is May (242mm).
The driest month (with the least rainfall) is January (1mm).
Average rainfall days in April
San Francisco Lempa, El Salvador
- Average rainfall days in April: 14.1 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 April /
Average sunshine in April
San Francisco Lempa, El Salvador
- Average daylight in April: 12h and 3min
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 April: 11h and 2min
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 April
San Francisco Lempa, El Salvador
- Average sunshine days in April: 14.2 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 April
San Francisco Lempa, El Salvador
- Average UV index in April: 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 April
San Francisco Lempa, El Salvador
- Average cloud cover in April: 27
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 April
San Francisco Lempa, El Salvador
- Average visibility in April: 10km
The months with the highest visibility are January, February, March, April and December (10km).
The month with the lowest visibility is September (7km).
