Ilopango climate — normals and trends
Ilopango (El Salvador) has a tropical savanna climate (Aw) under the Köppen-Geiger classification. Its mean annual temperature is 25.2 °C and it receives 1,527 mm of precipitation per year.
These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.
The warmest month is April (26.6 °C on average) and the coldest is December (24.3 °C). Rainfall peaks in September.
Ilopango averages 0 frost days, 258 hot days (≥ 30 °C) and 182 rainy days per year.
Ilopango has warmed by +2.1 °C between 1940 and 2025, or +0.24 °C per decade. This trend is statistically significant.
The hottest day of the period reached 38.7 °C (on 19 February 2020) and the coldest 10.4 °C (on 6 December 1945).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Climate normals · ERA5
IlopangoSan Salvador Department
- coords
- 13.70°, -89.11°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
25.2°C
Average daily high
31.0°C
Average daily low
20.9°C
Annual rainfall
1,527mm
Sunshine / day
10.6h
Mean relative humidity
71%
Average peak wind
9.2km/h
Seasonal range
2.3°C
Frost days (< 0 °C)
0 d/yr
Hot days (≥ 30 °C)
258 d/yr
Rainy days (≥ 1 mm)
182 d/yr
Annual snowfall
0.0 cm
Average feels-like high
34.5 °C
Average feels-like low
23.4 °C
Average peak gust
30.6 km/h
Tropical nights (≥ 20 °C)
279 d/yr
Solar radiation
20.0 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.1 °C
since 1940
+0.2 °C per decade · r² = 0.73 · p = < 0.001
Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).
A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.
Records for the period
Hottest day
38.7 °C
19 February 2020
Coldest day
10.4 °C
6 December 1945
Wettest day
202 mm
4 September 1969
Windiest day
28.5 km/h
17 January 1965
Strongest gust
74.9 km/h
17 January 1965
Hottest feels-like
41.9 °C
28 May 2024
Coldest feels-like
8.9 °C
6 December 1945
Sunniest day
12.2 h
8 June 1941
Normals computed over complete calendar years 1940–2025.
A specific year
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Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 33.1 °C | +1.7 °C | 9 mm | +5 mm |
| Feb | 34.0 °C | +1.6 °C | 11 mm | +7 mm |
| Mar | 34.0 °C | +1.0 °C | 16 mm | -0 mm |
| Apr | 33.7 °C | +1.0 °C | 65 mm | +6 mm |
| May | 32.9 °C | +1.6 °C | 113 mm | -93 mm |
| Jun | 31.4 °C | +1.5 °C | 373 mm | +97 mm |
| Jul | 33.2 °C | +2.3 °C | 142 mm | -42 mm |
| Aug | 32.9 °C | +2.1 °C | 174 mm | -38 mm |
| Sep | 31.4 °C | +1.9 °C | 255 mm | -35 mm |
| Oct | 30.6 °C | +1.2 °C | 276 mm | +60 mm |
| Nov | 32.1 °C | +2.0 °C | 20 mm | -29 mm |
| Dec | 32.3 °C | +1.5 °C | 33 mm | +24 mm |
The year's extremes
What was the weather like that day?
Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.
Frequently asked questions
What is the climate of Ilopango?
Ilopango has a tropical savanna climate (Köppen Aw). Over 1940-2025, the average annual temperature is 25.2 °C and it receives 1,527 mm of precipitation per year.
What is the hottest day ever recorded in Ilopango?
The hottest day measured in Ilopango between 1940 and 2025 was 19 February 2020, reaching 38.7 °C.
What is the coldest day in Ilopango?
The coldest day measured in Ilopango between 1940 and 2025 was 6 December 1945, at 10.4 °C.
Does it snow in Ilopango?
Almost never: Ilopango sees virtually no snow, with about 0 frost days per year.
Has the climate of Ilopango warmed?
Yes: Ilopango warmed by +2.1 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Ilopango?
The wettest day measured in Ilopango between 1940 and 2025 was 4 September 1969, with 202 mm of rain in 24 hours.
What was the windiest day in Ilopango?
The windiest day measured in Ilopango between 1940 and 2025 was 17 January 1965, with winds reaching 28.5 km/h.
What is the warmest month in Ilopango?
The warmest month in Ilopango is April (26.6 °C on average); the coldest is December (24.3 °C).
How much does it rain in Ilopango?
Ilopango receives on average 1,527 mm of precipitation per year, spread over about 182 rainy days.
Is it sunny in Ilopango?
Ilopango gets on average 10.6 hours of sunshine per day, roughly 3,869 hours per year over 1940-2025.
Are there tropical nights in Ilopango?
Yes: Ilopango has on average 279 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Ilopango?
In Ilopango, between 1940 and 2025, the highest apparent temperature reached 41.9 °C on 28 May 2024, and the lowest was 8.9 °C on 6 December 1945.
Compare Ilopango with another city
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Nearby cities
The climate around Ilopango