El Viejo weather in September

In September, El Viejo sees average daytime highs of 32°C and overnight lows near 24°C, with 384 mm of rain across 26.9 wet days and about 12.1 hours of daylight. It is the 11th-warmest and 1st-wettest month of the year here.

Day-to-day highs hold fairly steady near 32°C through the month. The sky is clear or mostly clear about 8% of the time in September, and the air most often feels miserable.

Daylight stretches from about 12 h 12 min at the start of September to 11 h 54 min by month's end. Set against the rest of the year, September is El Viejo's 11th-clearest and 11th-windiest month. For the whole year in context, see El Viejo's year-round climate.

Daytime high
32°
11th warmest
Overnight low
24°
5th coldest
Rainfall
384 mm
26.9 wet days
Daylight
12 h 06 min
5:41 AM – 5:45 PM
Cloud cover
77%
11th clearest
Wind
6 km/h
11th windiest
Solar energy
5.59 kWh/m²
Travel score
2.4
out of 10

El Viejo is town in Nicaragua, seat of the Municipio de El Viejo.

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 32°C through the month.

A typical September day in El Viejo reaches about 32°C in the afternoon and slips back to 24°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 29°C and 34°C. Set against its neighbours, September runs about 1°C cooler than August and on par with October.

20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
13224
23224
33224
43224
53224
63224
73224
83224
93224
103224
113224
123224
133224
143224
153224
163224
173224
183224
193224
203224
213124
223124
233124
243124
253124
263124
273124
283124
293124
303124

How September really feels in El Viejo

Once humidity and wind are folded in, September averages 30 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
30
5 feel dangerously hot (≥ 39°C)
Days feeling ≤ C
0
wind chill below the day's low

The story in September is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

El Viejo weather by month

How September compares with the rest of the year at a glance. September is the 11th-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan34° / 24°20.511.33.6
Feb35° / 24°20.611.63.1
Mar36° / 25°51.611.92.5
Apr36° / 26°367.512.32.2
May34° / 25°26621.512.62.2
Jun33° / 25°3262312.72.5
Jul34° / 25°16717.212.72.6
Aug33° / 25°24922.512.42.4
Sep32° / 24°38426.912.12.4
Oct31° / 24°37324.911.72.9
Nov32° / 24°809.211.44.1
Dec34° / 24°61.711.34.1

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 8% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 13% of September, with mostly cloudy or overcast conditions the remaining 79%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
12476
22476
32476
42476
52476
62476
72476
82476
92476
102476
112476
122476
132278
142278
152278
162080
172080
182080
192080
201981
211882
221882
231783
241783
251783
261783
271882
281981
291981
301981

Chance of precipitation in September

Any precipitation

El Viejo gets around 384 mm of rain over 26.9 wet days in September, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 89% and peaks near 93% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%100%151015202530
Rain chance (%)
186
286
387
487
587
687
787
887
987
1087
1187
1287
1387
1488
1588
1689
1789
1890
1990
2091
2191
2292
2392
2493
2593
2693
2793
2893
2992
3092

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the miserable band about 66% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Muggy (%)Oppressive (%)Miserable (%)
113762
203763
303763
403763
503763
603763
703763
803763
903664
1003664
1103565
1203565
1303466
1403367
1503268
1603268
1703169
1803169
1903070
2003070
2103169
2203169
2303169
2403268
2503268
2603367
2703466
2803466
2903565
3003664

Wind in September

Winds average 6 km/h in September.

Across September, daily wind ranges from about 6 km/h on the calmest days to 6 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 12 min at the start of September to 11 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 18 minutes over September. Sunrise moves from 5:41 AM to 5:41 AM, and sunset from 5:56 PM to 5:35 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.25:415:56
212.25:415:55
312.25:415:54
412.25:415:54
512.25:415:53
612.25:415:52
712.25:415:52
812.25:415:51
912.25:415:50
1012.15:415:49
1112.15:415:49
1212.15:415:48
1312.15:415:47
1412.15:415:47
1512.15:415:46
1612.15:415:45
1712.15:415:44
1812.05:415:44
1912.05:415:43
2012.05:415:42
2112.05:415:41
2212.05:415:41
2312.05:415:40
2412.05:415:39
2512.05:415:39
2611.95:415:38
2711.95:415:37
2811.95:415:36
2911.95:415:36
3011.95:415:35

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.59 kWh/m².

For context, solar energy here swings from a low near 5.08 kWh/m² to a high of 6.78 kWh/m² in April across the year — September's 5.59 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.9Bright
25.9Bright
35.9Bright
45.9Bright
55.9Bright
65.8Bright
75.8Bright
85.8Bright
95.8Bright
105.8Bright
115.8Bright
125.7Bright
135.7Bright
145.7Bright
155.6Bright
165.6Bright
175.6Bright
185.5Bright
195.5Bright
205.5Bright
215.4Bright
225.4Bright
235.4Bright
245.3Bright
255.3Bright
265.3Bright
275.3Bright
285.2Bright
295.2Bright
305.2Bright
Planning a trip in September

Hazard calendar for El Viejo

In seasonPeak

In September, El Viejo sits inside its atlantic hurricane and monsoon season. The full year is below, with each hazard's peak months called out.

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

El Viejo'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 September a good time to visit El Viejo?

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

2.4
Sightseeing
9th-best month of the year
3.8
Beach & pool
12th-best month of the year

September is a weaker month for outdoor sightseeing in El Viejo.

What to pack for El Viejo in September

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

In September, El Viejo sees daytime highs around 32°C and nights near 24°C. Pack light clothes and rain gear. Worth having: sun protection. About 27 days see rain.

light clothesrain gearsun protection

Sea temperature near El Viejo in September

The nearest coast averages about 30°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 23 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
Jan28Warm
Feb28Warm
Mar28Tropical
Apr29Tropical
May29Tropical
Jun30Tropical
Jul30Tropical
Aug30Tropical
Sep30Tropical
Oct29Tropical
Nov29Tropical
Dec28Tropical

UV index in El Viejo in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 12 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in El Viejo peaks around March 22 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 14 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 highMar 22UV 13Dec 14UV 9
UV index (midday)Level
Jan10Extreme
Feb12Extreme
Mar13Extreme
Apr13Extreme
May12Extreme
Jun13Extreme
Jul12Extreme
Aug12Extreme
Sep12Extreme
Oct11Extreme
Nov9Very high
Dec9Very high

Air quality in El Viejo in September

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in El Viejo is worst in April — around 35 µg/m³ PM2.5 (moderate), about 3.2× the cleanest month (January, 11 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateApr 2234 µg/m³Jan 1511 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb13Moderate
Mar19Moderate
Apr35Moderate
May33Moderate
Jun24Moderate
Jul26Moderate
Aug22Moderate
Sep19Moderate
Oct18Moderate
Nov17Moderate
Dec12Moderate
Location & terrain

Where is El Viejo?

El Viejo sits at 12.7°N, 87.2°W, 49 m above sea level, in Nicaragua. The nearest listed city is Chinandega, 5.0 km away.

LeónSomotilloLa Paz CentroMarcoviaCiudad Choluteca

Topography around El Viejo

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

Within 3 km, the terrain around El Viejo has only modest variations in elevation — a maximum elevation change of 60 m around an average of 49 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,091 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,751 m.

The land around El Viejo is covered by cropland (43%) and trees (39%) within 3 km, trees (43%) and cropland (39%) within 16 km, and water (39%), trees (27%) and grassland (20%) within 80 km.

3 km
60 m
16 km
1,091 m
80 km
1,751 m
treesgrasslandcroplandartificial surfaceswatermangroves
September weather nearby: Chinandega 5.0 km · Chichigalpa 18 km · Corinto 20 km · León 40 km · Somotillo 51 km · La Paz Centro 64 km · Marcovia 71 km · Ciudad Choluteca 71 km

Nicaragua travel facts

Travel advisory
Level 3
Reconsider Travel
Power plugs
Type A / B
120 V · 60 Hz
Prices
≈ 34% of US
price level, 2025
GDP per capita
$3,173
2025
Happiness
6.3 / 10
World Happiness, 2025
Homicide rate
11.3
per 100k, 2021
Road deaths
16.9
per 100k/yr, 2019
Income group
Lower middle
World Bank
English
Moderate
EF EPI 512
Religion
Roman Catholic 45%Protestant 39%none 14%other 1%

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 El Viejo (12.6635°, -87.1666°, elevation 49 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).