Climate and monthly weather forecastUsulutan, El Salvador
Climate and monthly weather forecast
The climate of Usulutan
According to the Köppen climate classification, Usulutan, El Salvador is identified as a location with a predominantly 'Aw' climate type; a tropical wet and dry or savannah climate. Positioned on the eastern part of El Salvador, Usulutan is characterised by significant variations in temperature and rainfall throughout the year.The climate data reveals a seasonal variation in temperature, with average high temperatures ranging from 30.1°C (86.2°F) in October to 33.2°C (91.8°F) in March. The cooler months, however, do not show much of a drop, with average low temperatures staying above 20°C (68°F) year-round. The highest average low temperatures are observed in April and May at 24.5°C (76.1°F) and 24.3°C (75.7°F), respectively, while the coolest month is December, with a low of 20.7°C (69.3°F).
Usulutan's weather is marked by considerably high humidity levels, which hover from 61 to 83% throughout the year. These levels peak from September to November, creating a more intense heat.
Rainfall patterns in Usulutan reveal a distinctive distribution. The dry season shows rainfall merely touching 1mm (0.04") to 12mm (0.47") from January to March. The weather begins to transition in April with 50mm (1.97") of rain, entering the wet season, which peaks in October with a massive 232mm (9.13") of rainfall.
The best time to visit Usulutan
The ideal time to visit Usulutan is dictated by the visitor’s preference for hot, dry weather or cooler, wet conditions. For those favoring drier conditions, the period from January to March is recommended. With minimal rainfall fluctuating between 1mm (0.04") in January to 12mm (0.47") in March and pleasant warmth ranging from 31.8°C (89.2°F) to 33.2°C (91.8°F), Usulutan provides an inviting atmosphere for outdoor activities.The worst time to visit Usulutan
Travelers looking to avoid heavy rainfall and high humidity levels should steer clear of the period from May to November. Particularly, October stands out as the wettest month, with an average rainfall reaching an abundant 232mm (9.13"). Moreover, the humidity level is at its highest during this period, which could lead to discomfort for some travelers.Spring weather in Usulutan
Usulutan does not experience spring in the conventional sense due to its tropical climate. However, the period from March to May, which coincides with the traditional spring months, stands out due to its high temperatures. The average high temperature peaks at 33.2°C (91.8°F) in March and remains well above 30°C (86°F) into May. Meanwhile, rainfall begins to increase, with May witnessing a significant jump to an average of 206mm (8.11"). This period also sees an increase in humidity levels, making for a warmer and significantly more humid experience compared to the preceding months.Summer weather in Usulutan
Reflecting the tropical savanna climate, Usulutan’s summer period, June through August, is characterized by high humidity and significant rainfall. The average precipitation level reaches a substantial 200mm (7.87") in June and 121mm (4.76") in August. Meanwhile, humidity levels hover around 81% in June and 79% in August. However, the average high temperatures remain relatively stable, ranging from 30.7°C (87.3°F) in June to 31.9°C (89.4°F) in August.Autumn weather in Usulutan
The supposed 'Autumn' months, September to November, present the climax of Usulutan’s wet season. The rainfall level peaks in October at 232mm (9.13") before dropping to 56mm (2.2") in November. On the other hand, temperatures drop slightly with high temperatures going from 30.2°C (86.4°F) in September to 30.8°C (87.4°F) in November. The humidity level also remains high during this period, with November slightly lowering to 75%.Winter weather in Usulutan
In contrast to many geographical locations, the winter months in Usulutan, from December to February, are among the driest and warmest periods of the year. Rainfall levels fall dramatically from 56mm (2.2") in November to just 1mm (0.04") in December and continue to stay low at 6mm (0.24") in February. Despite this, temperatures remain quite warm with average high temperatures ranging from 31.1°C (88°F) in December to 32.3°C (90.1°F) in February proving that Usulutan's winter is anything but cold.Weather in January
In January, Usulutan, El Salvador shows signs of pleasant weather which tends to be consistent during this month. Comfortable temperatures are typically experienced, with the daily highs reaching up to 31.8°C (89.2°F) and the lows dropping to around 21°C (69.8°F). Weather in January »Weather in February
Come February, Usulutan notices a minor escalation in its weather patterns. There's a slight jump in both high and low temperatures - the highs now edge up to 32.3°C (90.1°F) while the lows settle around 21.8°C (71.2°F). Commencing the second month of the year, residents perceive a slight increase in relative humidity. Weather in February »Weather in March
March brings further climatic variation to Usulutan, with an ever so slight warming trend. The bit of warmth experienced ends up being accompanied by the year's first significant rainfall, registering at 12mm (0.47"). The daylight period continues to expand, and the amount of sunshine witnessed increases as well. Weather in March »Weather in April
April in Usulutan marks the real beginning of the warmer season. While there are noticeable fluctuations in temperatures, a not-install increase in humidity and daylight hours, the most remarkable shift is seen in the rainfall. The region registers a significant leap in rainfall, racking up to 50mm (1.97") in April, accompanied by a corresponding rise in rainfall days. Weather in April »Weather in May
May in Usulutan is characterized by the highest rainfall for the year, with the region receiving a significant 206mm (8.11"). This escalated rainfall is often accompanied by thunderstorms, which can be a spectacle to witness for any weather enthusiast. Weather in May »Weather in June
The month of June continues the wet season trend started in May, with significantly high rainfall. Usulutan witnesses a decrease in temperatures compared to the previous months, offering slightly cooler weather. The days see a marginal increase in daylight, and the pleasant warmth of ample sunshine persists. Weather in June »Weather in July
July in Usulutan experiences a decrease in rainfall, falling to roughly 121mm (4.76"). This month marks the beginning of a downward temperature trend, which results in pleasant weather. The humidity in July hovers around the same level as June, promoting steady weather conditions. Weather in July »Weather in August
August sees a steady continuation of the downward temperature trend, and an uptick is noticed in rainfall, registering 165mm (6.5"). Weather in August is quite humid, and the abundant rainfall can lead to increased cloud coverage over Usulutan. Weather in August »Weather in September
September in Usulutan is characterized by heavy rainfall — up to 182mm (7.17"). As the city ventures deeper into the wet season, temperatures continue to descend subtly. There's a notable decrease in daylight matching the reduced amount of sunshine, contributing to the overall gloomy weather conditions. Weather in September »Weather in October
October experiences the highest volume of rainfall for Usulutan with a staggering 232mm (9.13"). The noticeable dip in temperature reaches its climax in this month making it one of the coldest months in Usulutan. Sunshine hours experience a downward curve, and a considerable increase in cloudiness is observed. Weather in October »Weather in November
As November arrives in Usulutan, residents can noticeably detect the end of the wet season, with rainfall drastically decreasing to 56mm (2.2"). This month marks a transition to a drier climate, with the drop in rainfall paving the way for more sunshine. Weather in November »Weather in December
December in Usulutan warmly welcomes the dry season, with minimal rainfall registering at 11mm (0.43"). The dry spell in the climate marks a shift from the recent cooler months, and temperatures move subtly upwards. Less humidity and improved visibility dominate the weather scenario, enhancing the overall sunshine hours. Weather in December »Updated: Jan 29, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
The month with the least rainfall in Usulutan, El Salvador, is January, when the rain falls for 2.6 days and typically collects 1mm (0.04") of precipitation.
Throughout the year, in Usulutan, El Salvador, there are 206.2 rainfall days, and 1242mm (48.9") of precipitation is accumulated.
January through September and December, with an average maximum UV index of 7, are months with the highest UV index.
Usulutan's warmest month, March, generally records average temperatures ranging from a high of 33.2°C (91.8°F) to a low of 22.5°C (72.5°F).
The least humid month in Usulutan, El Salvador, is March, with an average relative humidity of 61%.
April and July, with an average of 11.4h of sunshine, are months with the most sunshine in Usulutan, El Salvador.
The month with the longest days is June, with an average of 12h and 54min of daylight.
October brings the lowest temperatures, with an average high of 30.1°C (86.2°F) and an average low of 22.3°C (72.1°F).
With an average relative humidity of 83%, October is the most humid month.
October is the month with the most rainfall in Usulutan. Rain falls for 26 days and accumulates 232mm (9.13") of precipitation.
The months with the lowest UV index are October and November, with an average maximum UV index of 6.
December has the shortest days of the year, with an average of 11h and 24min of daylight.
Usulutan does not observe Daylight Saving Time (DST). CST timezone is used throughout the entire year.
With an average of 7.6h of sunshine, December has the least sunshine of the year in Usulutan.
Average temperature
Usulutan, El Salvador
The warmest month (with the highest average high temperature) is March (33.2°C).
The month with the lowest average high temperature is October (30.1°C).
The month with the highest average low temperature is April (24.5°C).
The coldest month (with the lowest average low temperature) is December (20.7°C).
Average pressure
Usulutan, El Salvador
- Average pressure in January:
1013mbar - Average pressure in February:
1012.4mbar - Average pressure in March:
1012.2mbar - Average pressure in April:
1011.3mbar - Average pressure in May:
1011.1mbar - Average pressure in June:
1011.3mbar
- Average pressure in July:
1011.9mbar - Average pressure in August:
1011.5mbar - Average pressure in September:
1011.2mbar - Average pressure in October:
1011mbar - Average pressure in November:
1011.8mbar - Average pressure in December:
1012.4mbar
The month with the highest atmospheric pressure is January (1013mbar).
The month with the lowest atmospheric pressure is October (1011mbar).
Average wind speed
Usulutan, El Salvador
- Average wind speed in January:
7.7km/h - Average wind speed in February:
7.6km/h - Average wind speed in March:
7.4km/h - Average wind speed in April:
6.7km/h - Average wind speed in May:
6km/h - Average wind speed in June:
5.9km/h
- Average wind speed in July:
6.5km/h - Average wind speed in August:
6km/h - Average wind speed in September:
5.9km/h - Average wind speed in October:
6km/h - Average wind speed in November:
6.5km/h - Average wind speed in December:
7.1km/h
The windiest month (with the highest average wind speed) is January (7.7km/h).
The calmest months (with the lowest average wind speed) are June and September (5.9km/h).
Average humidity
Usulutan, El Salvador
The month with the highest relative humidity is October (83%).
The month with the lowest relative humidity is March (61%).
Average rainfall
Usulutan, El Salvador
The wettest month (with the highest rainfall) is October (232mm).
The driest month (with the least rainfall) is January (1mm).
Average rainfall days
Usulutan, El Salvador
- Average rainfall days in January:
2.6 days - Average rainfall days in February:
3.8 days - Average rainfall days in March:
8.1 days - Average rainfall days in April:
17.8 days - Average rainfall days in May:
25.7 days - Average rainfall days in June:
26.8 days
- Average rainfall days in July:
24 days - Average rainfall days in August:
26 days - Average rainfall days in September:
27.5 days - Average rainfall days in October:
26 days - Average rainfall days in November:
13.1 days - Average rainfall days in December:
4.8 days
The month with the highest number of rainy days is September (27.5 days).
The month with the least rainy days is January (2.6 days).
Average daylight / Average sunshine
Usulutan, El Salvador
- Average daylight in January:
11h and 24min - Average daylight in February:
11h and 42min - Average daylight in March:
12h and 6min - Average daylight in April:
12h and 24min - Average daylight in May:
12h and 42min - Average daylight in June:
12h and 54min
- Average daylight in July:
12h and 48min - Average daylight in August:
12h and 36min - Average daylight in September:
12h and 12min - Average daylight in October:
11h and 48min - Average daylight in November:
11h and 30min - Average daylight in December:
11h and 24min
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 24min).
- Average sunshine in January:
7h and 42min - Average sunshine in February:
8h and 24min - Average sunshine in March:
10h and 42min - Average sunshine in April:
11h and 24min - Average sunshine in May:
10h and 24min - Average sunshine in June:
10h and 18min
- Average sunshine in July:
11h and 24min - Average sunshine in August:
11h and 0min - Average sunshine in September:
8h and 48min - Average sunshine in October:
8h and 18min - Average sunshine in November:
9h and 30min - Average sunshine in December:
7h and 36min
The months with the most sunshine are April and July (Average sunshine: 11h and 24min).
The month with the least sunshine is December (Average sunshine: 7h and 36min).
Average sunshine days
Usulutan, El Salvador
- Average sunshine days in January:
27.9 days - Average sunshine days in February:
23.6 days - Average sunshine days in March:
22.1 days - Average sunshine days in April:
10.8 days - Average sunshine days in May:
4.8 days - Average sunshine days in June:
2.2 days
- Average sunshine days in July:
5.9 days - Average sunshine days in August:
4.5 days - Average sunshine days in September:
1.8 days - Average sunshine days in October:
4.5 days - Average sunshine days in November:
15.9 days - Average sunshine days in December:
25.6 days
The month with the most sunshine days is January (27.9 days).
The month with the least sunshine days is September (1.8 days).
Average UV index
Usulutan, El Salvador
The months with the highest UV index are January, February, March, April, May, June, July, August, September and December (UV index 7).
The months with the lowest UV index are October and November (UV index 6).
Average cloud cover
Usulutan, El Salvador
The month with the most cloud cover is October (Cloud cover 42).
The month with the least cloud cover is January (Cloud cover 14).
Average visibility
Usulutan, El Salvador
The months with the highest visibility are January, February, March, April, November and December (10km).
The months with the lowest visibility are May, June, July, August, September and October (9km).
