Quesada weather in September

In September, Quesada sees average daytime highs of 25°C and overnight lows near 18°C, with 315 mm of rain across 29.4 wet days and about 12.1 hours of daylight. It is the 5th-warmest and 2nd-wettest month of the year here.

Day-to-day highs hold fairly steady near 25°C through the month. The sky is clear or mostly clear about 0% of the time in September, and the air most often feels muggy.

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 Quesada's 10th-clearest and 12th-windiest month. For the whole year in context, see Quesada's year-round climate.

Daytime high
25°
5th warmest
Overnight low
18°
8th coldest
Rainfall
315 mm
29.4 wet days
Daylight
12 h 06 min
5:30 AM – 5:34 PM
Cloud cover
92%
10th clearest
Wind
5 km/h
12th windiest
Solar energy
4.29 kWh/m²
Travel score
3.5
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 25°C through the month.

A typical September day in Quesada reaches about 25°C in the afternoon and slips back to 18°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 23°C and 27°C. Set against its neighbours, September runs on par with August and on par with October.

15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12518
22518
32518
42518
52518
62518
72518
82518
92518
102518
112518
122518
132518
142518
152518
162518
172518
182518
192518
202518
212518
222518
232518
242518
252518
262518
272518
282518
292518
302518

Quesada weather by month

How September compares with the rest of the year at a glance. September is the 5th-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan23° / 16°8013.711.56.3
Feb24° / 16°509.511.77.0
Mar25° / 17°4410.511.96.8
Apr26° / 17°8016.412.25.5
May26° / 18°29727.612.53.8
Jun25° / 19°30329.212.63.5
Jul25° / 18°23428.312.53.7
Aug25° / 18°25828.812.33.7
Sep25° / 18°31529.412.13.5
Oct24° / 18°35230.311.83.5
Nov24° / 18°25126.111.54.1
Dec23° / 17°13719.111.45.4

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

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

Beyond those clear spells, partly cloudy skies cover about 1% of September, with mostly cloudy or overcast conditions the remaining 98%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
1298
2298
3298
4298
5298
6298
7298
8298
9298
10298
11298
12199
13199
14199
15199
16199
17199
18199
19199
20199
21199
22199
23199
24199
25199
26199
27199
28199
29199
30199

Chance of precipitation in September

Any precipitation

Quesada gets around 315 mm of rain over 29.4 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 98% and peaks near 99% on the wettest days.

0%20%40%60%80%100%151015202530
Rain chance (%)
196
296
396
497
597
697
797
897
998
1098
1198
1298
1398
1498
1598
1698
1798
1898
1998
2098
2198
2298
2398
2499
2599
2699
2799
2899
2999
3099

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the muggy band about 92% of days. Sticky, muggy-or-worse air turns up on roughly 92% of them.

0%25%50%75%100%151015202530
Humid (%)Muggy (%)
1991
2892
3892
4892
5892
6892
7892
8892
9892
10892
11991
12991
13991
14991
15991
16892
17892
18892
19892
20892
21892
22892
23892
24892
25892
26892
27892
28991
29991
30991

Wind in September

Winds average 5 km/h in September, the calmest month.

Across September, daily wind ranges from about 4 km/h on the calmest days to 5 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
194calm
204calm
214calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm

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 5:31 AM to 5:29 AM, and sunset from 5:43 PM to 5:25 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.25:315:43
212.25:315:43
312.25:315:42
412.25:315:42
512.25:315:41
612.25:315:40
712.15:315:40
812.15:315:39
912.15:315:38
1012.15:315:38
1112.15:315:37
1212.15:315:36
1312.15:315:36
1412.15:315:35
1512.15:305:34
1612.15:305:34
1712.05:305:33
1812.05:305:32
1912.05:305:32
2012.05:305:31
2112.05:305:30
2212.05:305:30
2312.05:305:29
2412.05:305:28
2512.05:305:28
2612.05:305:27
2711.95:305:27
2811.95:305:26
2911.95:305:25
3011.95:295:25

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.29 kWh/m².

For context, solar energy here swings from a low near 3.72 kWh/m² to a high of 6 kWh/m² in March across the year — September's 4.29 kWh/m² falls in the middle.

012345151015202530
Solar energy (kWh/m²)Level
14.5Bright
24.4Bright
34.4Bright
44.4Bright
54.4Bright
64.4Bright
74.4Bright
84.4Bright
94.4Bright
104.4Bright
114.3Bright
124.3Bright
134.3Bright
144.3Bright
154.3Bright
164.3Bright
174.3Bright
184.2Bright
194.2Bright
204.2Bright
214.2Bright
224.2Bright
234.2Bright
244.2Bright
254.2Bright
264.1Bright
274.1Bright
284.1Bright
294.1Bright
304.1Bright
Planning a trip in September

Is September a good time to visit Quesada?

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

3.5
Sightseeing
10th-best month of the year
3.2
Beach & pool
11th-best month of the year

September is a weaker month for outdoor sightseeing in Quesada.

What to pack for Quesada in September

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

In September, Quesada sees daytime highs around 25°C and nights near 18°C. Pack rain gear. Worth having: light clothes. About 29 days see rain.

rain gearlight clothes

Sea temperature near Quesada in September

The nearest coast averages about 29°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 54 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 Quesada in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Quesada peaks around March 19 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeMar 19UV 14Dec 17UV 10
UV index (midday)Level
Jan11Extreme
Feb13Extreme
Mar14Extreme
Apr14Extreme
May13Extreme
Jun13Extreme
Jul12Extreme
Aug13Extreme
Sep13Extreme
Oct12Extreme
Nov11Extreme
Dec10Very high

Air quality in Quesada 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 Quesada is worst in May — around 23 µg/m³ PM2.5 (moderate), about 2.5× the cleanest month (January, 10 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodMay 1623 µg/m³Jan 1210 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb11Good
Mar13Moderate
Apr21Moderate
May23Moderate
Jun21Moderate
Jul22Moderate
Aug20Moderate
Sep18Moderate
Oct15Moderate
Nov12Good
Dec10Good
Location & terrain

Where is Quesada?

Quesada sits at 10.3°N, 84.4°W, 616 m above sea level, in Costa Rica. The nearest listed city is San_Ramon_, 27 km away.

San_Ramon_La FortunaMonteverdeAlajuelaEsparzaMercedes NorteSan FranciscoHeredia

Topography around Quesada

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

Within 3 km, the terrain around Quesada has significant variations in elevation — a maximum elevation change of 559 m around an average of 669 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 2,252 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,407 m.

The land around Quesada is covered by trees (47%) and grassland (38%) within 3 km, trees (59%) and grassland (39%) within 16 km, and trees (67%) and grassland (23%) within 80 km.

3 km
559 m
16 km
2,252 m
80 km
3,407 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: San_Ramon_ 27 km · La Fortuna 28 km · Monteverde 41 km · Alajuela 42 km · Esparza 45 km · Mercedes Norte 49 km · San Francisco 50 km · Heredia 50 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 Quesada (10.3266°, -84.432°, elevation 616 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).