Chalchuapa weather in December

In December, Chalchuapa sees average daytime highs of 28°C and overnight lows near 17°C, with 9 mm of rain across 2 wet days and about 11.2 hours of daylight. It is the 8th-warmest and 10th-wettest month of the year here.

Day-to-day highs hold fairly steady near 28°C through the month. The sky is clear or mostly clear about 72% of the time in December, and the air most often feels humid.

Daylight stretches from about 11 h 12 min at the start of December to 11 h 12 min by month's end. Set against the rest of the year, December is Chalchuapa's 3rd-clearest and 2nd-windiest month. For the whole year in context, see Chalchuapa's year-round climate.

Daytime high
28°
8th warmest
Overnight low
17°
3rd coldest
Rainfall
9 mm
2 wet days
Daylight
11 h 12 min
6:20 AM – 5:30 PM
Cloud cover
29%
3rd clearest
Wind
9 km/h
2nd windiest
Solar energy
5.26 kWh/m²
Travel score
7.4
out of 10

Chalchuapa is district in Western Santa Ana, El Salvador.

Density
195/km²
people per km²

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 28°C through the month.

A typical December day in Chalchuapa reaches about 28°C in the afternoon and slips back to 17°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 30°C. Set against its neighbours, December runs on par with November and on par with January.

10°15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12817
22817
32817
42817
52817
62817
72817
82817
92817
102817
112817
122817
132817
142817
152817
162817
172817
182817
192817
202817
212817
222817
232817
242817
252817
262817
272817
282817
292817
302817
312817

Chalchuapa weather by month

How December compares with the rest of the year at a glance. December is the 8th-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 17°31.111.37.6
Feb30° / 17°31.211.56.8
Mar30° / 18°133.911.95.9
Apr30° / 19°5411.112.34.8
May29° / 20°21023.312.63.7
Jun28° / 20°28625.212.83.6
Jul29° / 20°14216.812.74.4
Aug29° / 20°20321.712.53.9
Sep28° / 19°32126.912.13.5
Oct28° / 19°23120.611.74.7
Nov28° / 18°375.811.46.7
Dec28° / 17°9211.27.4

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 72% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 16% of December, with mostly cloudy or overcast conditions the remaining 12%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
17921
28020
38119
48317
58416
68515
78614
88614
98713
108713
118812
128812
138812
149010
159010
169010
179010
189010
198911
209010
219010
229010
239010
249010
259010
269010
279010
289010
299010
309010
319010

Chance of precipitation in December

Any precipitation

Chalchuapa gets around 9 mm of rain over 2 wet days in December. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 6% and peaks near 8% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
18
27
37
47
56
66
76
86
96
106
116
126
137
147
157
167
177
186
196
206
216
226
236
246
256
266
276
286
296
306
315

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

Most of December feels humid — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, December lands in the humid band about 44% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
17344811
27354810
3736489
4737488
5737487
6738487
7738486
8839485
9839485
10839485
11840484
12840474
13841474
14941474
15942463
16942453
17943453
18944443
191045433
201046413
211047403
221048402
231049392
241049392
251050382
261050382
271050382
281050382
291150372
301150372
311151371

Wind in December

Winds average 9 km/h in December.

Across December, daily wind ranges from about 9 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm
319calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 11 h 12 min at the start of December to 11 h 12 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 0 minutes over December. Sunrise moves from 6:11 AM to 6:26 AM, and sunset from 5:25 PM to 5:37 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.26:115:25
211.26:125:26
311.26:135:26
411.26:135:26
511.26:145:26
611.26:145:27
711.26:155:27
811.26:155:27
911.26:165:28
1011.26:165:28
1111.26:175:28
1211.26:175:29
1311.26:185:29
1411.26:195:29
1511.26:195:30
1611.26:205:30
1711.26:205:31
1811.26:215:31
1911.26:215:32
2011.26:225:32
2111.26:225:32
2211.26:225:33
2311.26:235:33
2411.26:235:34
2511.26:245:34
2611.26:245:35
2711.26:255:35
2811.26:255:36
2911.26:265:36
3011.26:265:37
3111.26:265:37

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 5.26 kWh/m².

For context, solar energy here swings from a low near 4.83 kWh/m² to a high of 6.42 kWh/m² in March across the year — December's 5.26 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.2Bright
25.2Bright
35.2Bright
45.2Bright
55.2Bright
65.2Bright
75.2Bright
85.2Bright
95.2Bright
105.2Bright
115.2Bright
125.2Bright
135.2Bright
145.2Bright
155.2Bright
165.2Bright
175.2Bright
185.2Bright
195.2Bright
205.2Bright
215.3Bright
225.3Bright
235.3Bright
245.3Bright
255.3Bright
265.3Bright
275.3Bright
285.3Bright
295.3Bright
305.3Bright
315.3Bright
Planning a trip in December

Hazard calendar for Chalchuapa

In seasonPeak

None of Chalchuapa's seasonal hazards are active in December. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Chalchuapa sits in the Atlantic hurricane belt; the season peaks August–October.

Chalchuapa's monsoon runs August–October, when most of the year's rain falls.

Atlantic hurricane
Monsoon
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is December a good time to visit Chalchuapa?

Our two travel scores rate December for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

7.4
Sightseeing
2nd-best month of the year
8.7
Beach & pool
3rd-best month of the year

December is one of the better times to visit Chalchuapa for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Chalchuapa in December

From December's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In December, Chalchuapa sees daytime highs around 28°C and nights near 17°C. Pack light clothes. Worth having: sun protection.

light clothessun protection

Sea temperature near Chalchuapa in December

The nearest coast averages about 29°C in December — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 45 km away) is warmest in August at about 30°C and coldest in January near 28°C.

The water stays above 20°C all year — warm enough for a swim any month.

26°28°30°32°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan28Tropical
Feb28Tropical
Mar29Tropical
Apr30Tropical
May30Tropical
Jun30Tropical
Jul30Tropical
Aug30Tropical
Sep30Tropical
Oct29Tropical
Nov29Tropical
Dec29Tropical

UV index in Chalchuapa in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Chalchuapa peaks around April 13 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near November 23 at about 9 (very high).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highApr 13UV 14Nov 23UV 9
UV index (midday)Level
Jan10Very high
Feb13Extreme
Mar13Extreme
Apr14Extreme
May12Extreme
Jun13Extreme
Jul13Extreme
Aug12Extreme
Sep12Extreme
Oct11Extreme
Nov9Very high
Dec9Very high

Air quality in Chalchuapa in December

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where December falls, not just the annual average.

Air quality in Chalchuapa is worst in April — around 34 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (January, 16 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateApr 2233 µg/m³Jan 1416 µg/m³
PM2.5 (µg/m³)Level
Jan16Moderate
Feb17Moderate
Mar21Moderate
Apr34Moderate
May32Moderate
Jun23Moderate
Jul23Moderate
Aug21Moderate
Sep21Moderate
Oct21Moderate
Nov20Moderate
Dec17Moderate
Location & terrain

Where is Chalchuapa?

Chalchuapa sits at 14.0°N, 89.7°W, 710 m above sea level, in El Salvador. The nearest listed city is Santa Ana, 13 km away.

AhuachapanIzalcoSonzacateSonsonateAsunción MitaJalpataguaJutiapa

Topography around Chalchuapa

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Chalchuapa.

Within 3 km, the terrain around Chalchuapa has significant variations in elevation — a maximum elevation change of 256 m around an average of 721 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,953 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,703 m.

The land around Chalchuapa is covered by trees (44%) and grassland (20%) within 3 km, trees (65%) within 16 km, and trees (48%) and grassland (23%) within 80 km.

3 km
256 m
16 km
1,953 m
80 km
2,703 m
treesshrubsgrasslandcroplandartificial surfaceswater
December weather nearby: Santa Ana 13 km · Ahuachapan 19 km · Izalco 27 km · Sonzacate 28 km · Sonsonate 30 km · Asunción Mita 39 km · Jalpatagua 39 km · Jutiapa 40 km

El Salvador travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type A / B
115 V · 60 Hz
Prices
≈ 41% of US
price level, 2025
GDP per capita
$5,767
2025
Happiness
6.6 / 10
World Happiness, 2025
Homicide rate
7.9
per 100k, 2022
Road deaths
20.9
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Moderate
EF EPI 523
Religion
Roman Catholic 44%Protestant 40%none 16%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Chalchuapa (13.9867°, -89.6811°, elevation 710 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).