San Miguel weather in October

In October, San Miguel sees average daytime highs of 22°C and overnight lows near 15°C, with 537 mm of rain across 30.2 wet days and about 11.8 hours of daylight. It is the 10th-warmest and 1st-wettest month of the year here.

Day-to-day highs hold fairly steady near 22°C through the month. The sky is clear or mostly clear about 0% of the time in October, and the air most often feels humid.

Daylight stretches from about 11 h 54 min at the start of October to 11 h 42 min by month's end. Set against the rest of the year, October is San Miguel's 10th-clearest and 11th-windiest month. For the whole year in context, see San Miguel's year-round climate.

Daytime high
22°
10th warmest
Overnight low
15°
8th coldest
Rainfall
537 mm
30.2 wet days
Daylight
11 h 48 min
5:28 AM – 5:15 PM
Cloud cover
93%
10th clearest
Wind
4 km/h
11th windiest
Solar energy
3.83 kWh/m²
Travel score
3.3
out of 10

Temperature in October

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 22°C through the month.

A typical October day in San Miguel reaches about 22°C in the afternoon and slips back to 15°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 20°C and 23°C. Set against its neighbours, October runs on par with September and on par with November.

10°15°20°25°151015202531
Avg high (°C)Avg low (°C)
12215
22215
32215
42215
52215
62215
72215
82215
92215
102215
112215
122215
132215
142215
152215
162215
172215
182215
192215
202215
212215
222215
232215
242215
252215
262215
272215
282215
292215
302215
312215

San Miguel weather by month

How October compares with the rest of the year at a glance. October is the 10th-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan22° / 14°295.911.57.4
Feb23° / 14°275.611.77.7
Mar23° / 14°409.911.97.0
Apr23° / 15°12319.712.25.1
May22° / 16°45528.812.43.6
Jun22° / 16°45828.912.63.4
Jul22° / 15°34028.112.53.6
Aug22° / 15°43129.312.33.5
Sep22° / 15°50929.912.13.3
Oct22° / 15°53730.211.83.3
Nov21° / 15°29924.911.54.1
Dec22° / 14°8813.111.46.1

Cloud cover in October

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 0% of the time in October.

Beyond those clear spells, partly cloudy skies cover about 2% of October, with mostly cloudy or overcast conditions the remaining 98%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
1298
2298
3199
4199
5199
6199
7199
8199
9199
10199
11199
12199
13199
14199
15199
16298
17298
18397
19397
20397
21397
22397
23397
24397
25496
26496
27496
28496
29595
30595
31595

Chance of precipitation in October

Any precipitation

San Miguel gets around 537 mm of rain over 30.2 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 97% and peaks near 99% on the wettest days.

0%20%40%60%80%100%151015202531
Rain chance (%)
199
299
399
499
599
698
798
898
998
1098
1198
1298
1398
1498
1598
1698
1798
1898
1998
2098
2197
2297
2397
2497
2596
2696
2796
2895
2995
3094
3194

Humidity in October

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, October lands in the humid band about 79% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)
11882
21882
31882
41882
51783
61783
71783
81783
91783
101684
111684
121783
131783
141783
151882
161882
171981
182080
192179
202179
212278
222377
232476
242575
252674
262773
272872
282971
293070
303169
313268

Wind in October

Winds average 4 km/h in October.

Across October, daily wind ranges from about 3 km/h on the calmest days to 4 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
13calm
23calm
33calm
43calm
53calm
63calm
73calm
84calm
94calm
104calm
114calm
124calm
134calm
144calm
154calm
164calm
174calm
184calm
194calm
204calm
214calm
224calm
234calm
244calm
254calm
264calm
274calm
284calm
294calm
304calm
314calm

Sunrise & sunset in October

DaylightNight

Daylight runs from about 11 h 54 min at the start of October to 11 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 12 minutes over October. Sunrise moves from 5:28 AM to 5:30 AM, and sunset from 5:23 PM to 5:09 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.95:285:23
211.95:285:22
311.95:285:21
411.95:285:21
511.95:285:20
611.95:285:20
711.95:285:19
811.85:285:19
911.85:285:18
1011.85:285:18
1111.85:285:17
1211.85:285:17
1311.85:285:16
1411.85:285:16
1511.85:285:15
1611.85:285:15
1711.85:285:14
1811.85:285:14
1911.85:285:13
2011.75:285:13
2111.75:285:12
2211.75:295:12
2311.75:295:12
2411.75:295:11
2511.75:295:11
2611.75:295:11
2711.75:295:10
2811.75:305:10
2911.75:305:10
3011.75:305:10
3111.75:305:09

Solar energy in October

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in October, about 3.83 kWh/m².

For context, solar energy here swings from a low near 3.74 kWh/m² to a high of 6.04 kWh/m² in March across the year — October's 3.83 kWh/m² sits near the bottom.

012345151015202531
Solar energy (kWh/m²)Level
14.1Bright
24.0Bright
34.0Bright
44.0Bright
54.0Moderate
64.0Moderate
73.9Moderate
83.9Moderate
93.9Moderate
103.9Moderate
113.8Moderate
123.8Moderate
133.8Moderate
143.8Moderate
153.8Moderate
163.8Moderate
173.8Moderate
183.8Moderate
193.8Moderate
203.8Moderate
213.8Moderate
223.8Moderate
233.8Moderate
243.8Moderate
253.8Moderate
263.8Moderate
273.8Moderate
283.8Moderate
293.8Moderate
303.8Moderate
313.8Moderate
Planning a trip in October

Hazard calendar for San Miguel

In seasonPeak

In October, San Miguel sits inside its rainy season season. The full year is below, with each hazard's peak months called out.

San Miguel's rainy season runs May–November, when most of the year's rain falls.

Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is October a good time to visit San Miguel?

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

3.3
Sightseeing
11th-best month of the year
2.3
Beach & pool
12th-best month of the year

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

What to pack for San Miguel in October

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

In October, San Miguel sees daytime highs around 22°C and nights near 15°C. Pack rain gear. About 30 days see rain.

rain gear

Sea temperature near San Miguel 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 56 km away) is warmest in March at about 30°C and coldest in November 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
Jan29Tropical
Feb29Tropical
Mar30Tropical
Apr30Tropical
May29Tropical
Jun29Tropical
Jul29Tropical
Aug29Tropical
Sep29Tropical
Oct28Tropical
Nov28Warm
Dec28Tropical

UV index in San Miguel in October

LowModerateHighVery highExtreme

Clear-sky midday UV in October 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 San Miguel peaks around March 19 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 16 at about 10 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeMar 19UV 15Dec 16UV 10
UV index (midday)Level
Jan12Extreme
Feb14Extreme
Mar15Extreme
Apr14Extreme
May13Extreme
Jun13Extreme
Jul13Extreme
Aug13Extreme
Sep13Extreme
Oct12Extreme
Nov12Extreme
Dec10Extreme

Air quality in San Miguel 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 Miguel is worst in May — around 19 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (January, 9 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodMay 1718 µg/m³Jan 149 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb10Good
Mar11Good
Apr17Moderate
May19Moderate
Jun17Moderate
Jul18Moderate
Aug17Moderate
Sep16Moderate
Oct14Moderate
Nov12Good
Dec10Good
Location & terrain

Where is San Miguel?

San Miguel sits at 9.9°N, 84.1°W, 1,216 m above sea level, in Costa Rica. The nearest listed city is San Rafael Arriba, 2.0 km away.

Topography around San Miguel

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

Within 3 km, the terrain around San Miguel has significant variations in elevation — a maximum elevation change of 370 m around an average of 1,248 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,798 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,764 m.

The land around San Miguel is covered by trees (46%) and artificial surfaces (42%) within 3 km, trees (61%) and artificial surfaces (24%) within 16 km, and trees (68%) within 80 km.

3 km
370 m
16 km
1,798 m
80 km
3,764 m
treesgrasslandcroplandartificial surfacesbare terrainwater
October weather nearby: San Rafael Arriba 2.0 km · San Juan de Dios 3.0 km · Patarrá 3.0 km · Aserrí 4.0 km · Curridabat 5.0 km · San Felipe 6.0 km · San Pedro 6.0 km · San Diego 7.0 km

Costa Rica travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type A / B
120 V · 60 Hz
Prices
≈ 59% of US
price level, 2025
GDP per capita
$19,970
2025
Happiness
7.4 / 10
World Happiness, 2025
Safe drinking water
81%
of population, 2024
Homicide rate
17.7
per 100k, 2023
Road deaths
14.8
per 100k/yr, 2019
Income group
High
World Bank
English
Moderate
EF EPI 516
Religion
Roman Catholic 48%none 27%Evangelical and Pentecostal 20%other 3%

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 Miguel (9.8712°, -84.0608°, elevation 1,216 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. 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).