San_Ramon_ weather in October

In October, San_Ramon_ sees average daytime highs of 26°C and overnight lows near 20°C, with 503 mm of rain across 30.7 wet days and about 11.8 hours of daylight. It is the 12th-warmest and 1st-wettest month of the year here.

Day-to-day highs hold fairly steady near 26°C through the month. The sky is clear or mostly clear about 0% of the time in October, and the air most often feels muggy.

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_Ramon_'s 11th-clearest and 9th-windiest month. For the whole year in context, see San_Ramon_'s year-round climate.

Daytime high
26°
12th warmest
Overnight low
20°
6th coldest
Rainfall
503 mm
30.7 wet days
Daylight
11 h 48 min
5:30 AM – 5:16 PM
Cloud cover
91%
11th clearest
Wind
3 km/h
9th windiest
Solar energy
3.86 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 26°C through the month.

A typical October day in San_Ramon_ reaches about 26°C in the afternoon and slips back to 20°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 24°C and 28°C. Set against its neighbours, October runs on par with September and on par with November.

15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12720
22720
32620
42620
52620
62620
72620
82620
92620
102620
112620
122620
132620
142620
152620
162620
172620
182620
192620
202620
212620
222620
232620
242620
252620
262620
272620
282620
292620
302620
312620

San_Ramon_ 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
Jan28° / 20°216.711.56.8
Feb29° / 20°154.211.76.4
Mar30° / 20°247.911.95.6
Apr29° / 21°9820.712.24.1
May28° / 21°38129.612.53.3
Jun27° / 21°41729.812.63.3
Jul27° / 21°32029.912.53.3
Aug27° / 21°39830.412.33.3
Sep27° / 20°44229.812.13.3
Oct26° / 20°50330.711.83.3
Nov26° / 20°26726.511.53.9
Dec27° / 20°7516.311.45.7

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 3% of October, with mostly cloudy or overcast conditions the remaining 97%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
1298
2298
3298
4298
5298
6298
7298
8298
9298
10298
11298
12298
13298
14298
15298
16298
17298
18298
19397
20397
21397
22397
23397
24397
25496
26496
27595
28595
29595
30595
31694

Chance of precipitation in October

Any precipitation

San_Ramon_ gets around 503 mm of rain over 30.7 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 99% and peaks near 99% on the wettest days.

0%20%40%60%80%100%151015202531
Rain chance (%)
199
299
399
499
599
699
799
899
999
1099
1199
1299
1399
1499
1599
1699
1799
1899
1999
2099
2199
2299
2399
2499
2599
2699
2799
2899
2998
3098
3198

Humidity in October

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, October lands in the muggy band about 79% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Muggy (%)Oppressive (%)
17822
27822
37822
47822
57822
67822
77822
87822
97723
107723
117723
127723
137624
147624
157624
167723
177723
187723
197723
207822
217822
227921
237921
248020
258119
268119
278218
288317
298416
308515
318515

Wind in October

Winds average 3 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
34calm
44calm
54calm
64calm
74calm
84calm
94calm
104calm
114calm
124calm
134calm
144calm
154calm
164calm
173calm
183calm
193calm
203calm
213calm
223calm
233calm
243calm
253calm
263calm
273calm
283calm
294calm
304calm
314calm

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 5:30 AM to 5:32 AM, and sunset from 5:24 PM to 5:11 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.95:305:24
211.95:295:24
311.95:295:23
411.95:295:22
511.95:295:22
611.95:295:21
711.95:295:21
811.85:295:20
911.85:295:20
1011.85:295:19
1111.85:295:19
1211.85:295:18
1311.85:305:18
1411.85:305:17
1511.85:305:17
1611.85:305:16
1711.85:305:16
1811.85:305:15
1911.75:305:15
2011.75:305:14
2111.75:305:14
2211.75:305:14
2311.75:315:13
2411.75:315:13
2511.75:315:12
2611.75:315:12
2711.75:315:12
2811.75:315:12
2911.75:325:11
3011.75:325:11
3111.65:325:11

Solar energy in October

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in October, about 3.86 kWh/m².

For context, solar energy here swings from a low near 3.82 kWh/m² to a high of 6.19 kWh/m² in March across the year — October's 3.86 kWh/m² sits near the bottom.

012345151015202531
Solar energy (kWh/m²)Level
14.1Bright
24.1Bright
34.1Bright
44.1Bright
54.0Bright
64.0Bright
74.0Moderate
84.0Moderate
93.9Moderate
103.9Moderate
113.9Moderate
123.9Moderate
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_Ramon_

In seasonPeak

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

San_Ramon_'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_Ramon_?

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

3.3
Sightseeing
7th-best month of the year
3.3
Beach & pool
12th-best month of the year

October is a weaker month for outdoor sightseeing in San_Ramon_.

What to pack for San_Ramon_ in October

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

In October, San_Ramon_ sees daytime highs around 26°C and nights near 20°C. Pack rain gear. Worth having: light clothes. About 31 days see rain.

rain gearlight clothes

Sea temperature near San_Ramon_ 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 29 km away) is warmest in April at about 29°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°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan29Tropical
Feb29Tropical
Mar29Tropical
Apr29Tropical
May29Tropical
Jun29Tropical
Jul29Tropical
Aug29Tropical
Sep29Tropical
Oct28Tropical
Nov28Warm
Dec28Tropical

UV index in San_Ramon_ 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_Ramon_ peaks around February 22 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 17 at about 10 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeFeb 22UV 14Dec 17UV 10
UV index (midday)Level
Jan11Extreme
Feb14Extreme
Mar14Extreme
Apr14Extreme
May12Extreme
Jun13Extreme
Jul12Extreme
Aug12Extreme
Sep12Extreme
Oct12Extreme
Nov11Extreme
Dec10Very high

Air quality in San_Ramon_ 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_Ramon_ is worst in May — around 18 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (January, 9 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodMay 1617 µg/m³Jan 19 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb10Good
Mar11Good
Apr16Moderate
May18Moderate
Jun16Moderate
Jul17Moderate
Aug15Moderate
Sep14Moderate
Oct12Moderate
Nov11Good
Dec9Good
Location & terrain

Where is San_Ramon_?

San_Ramon_ sits at 10.1°N, 84.5°W, 0 m above sea level, in Costa Rica. The nearest listed city is Esparza, 24 km away.

EsparzaQuesadaAlajuelaSan Rafael AbajoChacaritaMercedes NorteSan FranciscoHeredia

Topography around San_Ramon_

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

Within 3 km, the terrain around San_Ramon_ has significant variations in elevation — a maximum elevation change of 294 m around an average of 1,066 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,914 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,414 m.

The land around San_Ramon_ is covered by trees (53%), artificial surfaces (25%) and grassland (21%) within 3 km, trees (68%) and grassland (27%) within 16 km, and trees (61%) within 80 km.

3 km
294 m
16 km
1,914 m
80 km
3,414 m
treesgrasslandcroplandartificial surfaceswatermangroves
October weather nearby: Esparza 24 km · Quesada 27 km · Alajuela 29 km · San Rafael Abajo 35 km · Chacarita 36 km · Mercedes Norte 38 km · San Francisco 39 km · Heredia 40 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_Ramon_ (10.088°, -84.4702°, elevation 0 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).