San Marcos weather in October

In October, San Marcos sees average daytime highs of 30°C and overnight lows near 22°C, with 318 mm of rain across 26.7 wet days and about 11.7 hours of daylight. It is the 12th-warmest and 1st-wettest month of the year here.

Day-to-day highs hold fairly steady near 30°C through the month. The sky is clear or mostly clear about 8% of the time in October, and the air most often feels oppressive.

Daylight stretches from about 11 h 54 min at the start of October to 11 h 36 min by month's end. Set against the rest of the year, October is San Marcos's 10th-clearest and 12th-windiest month. For the whole year in context, see San Marcos's year-round climate.

Daytime high
30°
12th warmest
Overnight low
22°
6th coldest
Rainfall
318 mm
26.7 wet days
Daylight
11 h 42 min
5:38 AM – 5:22 PM
Cloud cover
78%
10th clearest
Wind
7 km/h
12th windiest
Solar energy
4.83 kWh/m²
Travel score
3.1
out of 10

San Marcos is urban area and municipal seat Carazo Department, Nicaragua.

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

Temperature in October

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 30°C through the month.

A typical October day in San Marcos reaches about 30°C in the afternoon and slips back to 22°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 31°C. Set against its neighbours, October runs on par with September and on par with November.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13023
23023
33023
43023
53023
63023
73023
83023
93023
103023
113022
123022
133022
143022
153022
163022
173022
183022
193022
203022
213022
223022
233022
243022
253022
263022
273022
283022
293022
303022
313022

How October really feels in San Marcos

Once humidity and wind are folded in, October averages 31 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
31
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

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

San Marcos weather by month

How October compares with the rest of the year at a glance. October is the 12th-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 22°40.911.46.0
Feb32° / 22°30.711.65.5
Mar33° / 22°51.311.94.6
Apr34° / 23°325.712.33.5
May32° / 24°23820.112.52.9
Jun30° / 23°28124.712.73.0
Jul30° / 23°17621.212.63.5
Aug31° / 23°23224.312.43.1
Sep30° / 23°3182812.12.7
Oct30° / 22°31826.711.73.1
Nov30° / 22°1021311.54.6
Dec30° / 22°132.611.35.9

Cloud cover in October

ClearMostly clearPartly cloudyMostly cloudyOvercast

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

Beyond those clear spells, partly cloudy skies cover about 12% of October, with mostly cloudy or overcast conditions the remaining 79%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
11486
21486
31486
41486
51486
61486
71486
81486
91486
101486
111486
121585
131585
141585
151684
161882
171981
182080
192179
202278
212476
222476
232674
242872
252872
262971
273268
283268
293367
303466
313565

Chance of precipitation in October

Any precipitation

San Marcos gets around 318 mm of rain over 26.7 wet days in October, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 86% and peaks near 94% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%100%151015202531
Rain chance (%)
194
294
393
493
593
692
792
892
991
1091
1191
1290
1390
1489
1589
1689
1788
1887
1986
2085
2184
2283
2382
2481
2579
2678
2777
2875
2974
3072
3169

Humidity in October

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, October lands in the oppressive band about 95% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
100991
200991
300991
401981
501981
601981
701981
801981
901981
1001981
1101981
1201981
1302971
1402971
1502971
1603961
1703961
1804951
1904951
2005941
2105941
2206931
2306931
2407921
2508911
2608911
2709901
28010891
29110881
30111871
31113851

Wind in October

Winds average 7 km/h in October, the calmest month.

Across October, daily wind ranges from about 7 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
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
309calm
319calm

Sunrise & sunset in October

DaylightNight

Daylight runs from about 11 h 54 min at the start of October to 11 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 18 minutes over October. Sunrise moves from 5:37 AM to 5:41 AM, and sunset from 5:31 PM to 5:16 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.95:375:31
211.95:375:30
311.95:375:29
411.95:375:29
511.95:375:28
611.85:375:27
711.85:375:27
811.85:375:26
911.85:375:26
1011.85:375:25
1111.85:375:24
1211.85:375:24
1311.85:385:23
1411.85:385:23
1511.75:385:22
1611.75:385:22
1711.75:385:21
1811.75:385:21
1911.75:385:20
2011.75:395:20
2111.75:395:19
2211.75:395:19
2311.75:395:19
2411.65:395:18
2511.65:405:18
2611.65:405:17
2711.65:405:17
2811.65:405:17
2911.65:405:16
3011.65:415:16
3111.65:415:16

Solar energy in October

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in October, about 4.83 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 4.83 kWh/m² to a high of 6.8 kWh/m² in April across the year — October's 4.83 kWh/m² sits near the bottom.

024151015202531
Solar energy (kWh/m²)Level
15.0Bright
25.0Bright
35.0Bright
44.9Bright
54.9Bright
64.9Bright
74.9Bright
84.9Bright
94.8Bright
104.8Bright
114.8Bright
124.8Bright
134.8Bright
144.8Bright
154.8Bright
164.8Bright
174.8Bright
184.8Bright
194.8Bright
204.8Bright
214.8Bright
224.8Bright
234.8Bright
244.8Bright
254.8Bright
264.8Bright
274.9Bright
284.9Bright
294.9Bright
304.9Bright
314.9Bright
Planning a trip in October

Hazard calendar for San Marcos

In seasonPeak

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

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

San Marcos's monsoon runs May–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 October a good time to visit San Marcos?

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

3.1
Sightseeing
8th-best month of the year
4.2
Beach & pool
11th-best month of the year

October is a weaker month for outdoor sightseeing in San Marcos.

What to pack for San Marcos in October

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

In October, San Marcos sees daytime highs around 30°C and nights near 22°C. Pack light clothes and rain gear. Worth having: sun protection. About 27 days see rain.

light clothesrain gearsun protection

Sea temperature near San Marcos in October

The nearest coast averages about 28°C in October — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 37 km away) is warmest in September at about 29°C and coldest in February near 26°C.

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

24°26°28°30°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan27Warm
Feb26Warm
Mar26Warm
Apr27Warm
May29Tropical
Jun29Tropical
Jul28Tropical
Aug29Tropical
Sep29Tropical
Oct28Tropical
Nov28Warm
Dec27Warm

UV index in San Marcos in October

LowModerateHighVery highExtreme

Clear-sky midday UV in October peaks around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in San Marcos peaks around March 22 at about 14 (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 14Dec 14UV 9
UV index (midday)Level
Jan11Extreme
Feb13Extreme
Mar14Extreme
Apr13Extreme
May12Extreme
Jun13Extreme
Jul12Extreme
Aug12Extreme
Sep12Extreme
Oct11Extreme
Nov10Very high
Dec9Very high

Air quality in San Marcos in October

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in San Marcos is worst in July — around 25 µg/m³ PM2.5 (moderate), about 3.5× the cleanest month (January, 7 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1625 µg/m³Jan 187 µg/m³
PM2.5 (µg/m³)Level
Jan7Good
Feb9Good
Mar10Good
Apr21Moderate
May24Moderate
Jun21Moderate
Jul25Moderate
Aug20Moderate
Sep15Moderate
Oct13Moderate
Nov11Good
Dec10Good
Location & terrain

Where is San Marcos?

San Marcos sits at 11.9°N, 86.2°W, 554 m above sea level, in Nicaragua. The nearest listed city is Masatepe, 6.0 km away.

Topography around San Marcos

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

Within 3 km, the terrain around San Marcos has significant variations in elevation — a maximum elevation change of 278 m around an average of 556 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 863 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,591 m.

The land around San Marcos is covered by trees (85%) within 3 km, trees (77%) within 16 km, and water (43%), trees (31%) and grassland (20%) within 80 km.

3 km
278 m
16 km
863 m
80 km
1,591 m
treesgrasslandcroplandartificial surfaceswater
October weather nearby: Masatepe 6.0 km · Jinotepe 7.0 km · Diriamba 7.0 km · Masaya 14 km · El Crucero 15 km · Nandaime 24 km · Managua 25 km · San Rafael del Sur 26 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 San Marcos (11.9095°, -86.2035°, elevation 554 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).