Cotoca weather in September

In September, Cotoca sees average daytime highs of 31°C and overnight lows near 20°C, with 70 mm of rain across 7.3 wet days and about 11.9 hours of daylight. It is the 5th-warmest and 7th-wettest month of the year here.

Day-to-day highs hold fairly steady near 31°C through the month. The sky is clear or mostly clear about 45% of the time in September, and the air most often feels muggy.

Daylight stretches from about 11 h 36 min at the start of September to 12 h 06 min by month's end. Set against the rest of the year, September is Cotoca's 3rd-clearest and 2nd-windiest month. For the whole year in context, see Cotoca's year-round climate.

Daytime high
31°
5th warmest
Overnight low
20°
5th coldest
Rainfall
70 mm
7.3 wet days
Daylight
11 h 54 min
6:10 AM – 6:04 PM
Cloud cover
50%
3rd clearest
Wind
15 km/h
2nd windiest
Solar energy
5.32 kWh/m²
Travel score
5.1
out of 10

Cotoca is Town and municipality in the Santa Cruz Department, Bolivia.

Density
2,197/km²
people per km²

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 31°C through the month.

A typical September day in Cotoca reaches about 31°C in the afternoon and slips back to 20°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 24°C and 36°C. Set against its neighbours, September runs about 2°C warmer than August and about 1°C cooler than October.

10°20°30°40°151015202530
Avg high (°C)Avg low (°C)
13019
23019
33019
43019
53019
63019
73019
83020
93020
103020
113020
123020
133120
143120
153120
163120
173120
183120
193120
203120
213120
223120
233120
243120
253120
263121
273121
283121
293121
303121

How September really feels in Cotoca

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

September sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Cotoca weather by month

How September compares with the rest of the year at a glance. September is the 5th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 23°16817.112.93.6
Feb30° / 23°13816.212.63.8
Mar30° / 22°12414.412.14.2
Apr29° / 21°7010.711.65.3
May26° / 18°6110.311.26.5
Jun25° / 17°518.3117.0
Jul26° / 16°425.7117.5
Aug29° / 18°465.211.46.7
Sep31° / 20°707.311.95.1
Oct31° / 22°8810.512.44.2
Nov31° / 22°12112.812.84.0
Dec31° / 23°16516.9133.7

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 45% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 16% of September, with mostly cloudy or overcast conditions the remaining 39%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17129
27129
37129
47030
57030
66931
76733
86733
96634
106535
116535
126337
136337
146238
156139
166040
175941
185941
195842
205743
215743
225644
235545
245545
255446
265347
275248
285248
295149
305248

Chance of precipitation in September

Any precipitation

Cotoca gets around 70 mm of rain over 7.3 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 25% and peaks near 30% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%151015202530
Rain chance (%)
118
219
320
420
521
622
723
823
924
1024
1124
1224
1324
1424
1525
1625
1725
1825
1925
2025
2125
2226
2326
2427
2527
2628
2729
2829
2929
3030

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 31% of days. Sticky, muggy-or-worse air turns up on roughly 44% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1301021318
2301021319
3301020319
4301020319
5301020319
62911203110
72911203110
82911203010
92911203010
102812203010
112712203011
122712203011
132613203011
142513203012
152513203012
162414203012
172314203012
182314203013
192214203013
202114203014
212014203015
222014203116
231913203117
241813203118
251713203119
261612203220
271512193222
281512193223
291411193224
301311193125

Wind in September

Winds average 15 km/h in September.

Across September, daily wind ranges from about 15 km/h on the calmest days to 15 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
115light breeze
215light breeze
315light breeze
415light breeze
515light breeze
615light breeze
715light breeze
815light breeze
915light breeze
1015light breeze
1115light breeze
1215light breeze
1315light breeze
1415light breeze
1515light breeze
1615light breeze
1715light breeze
1815light breeze
1915light breeze
2015light breeze
2115light breeze
2215light breeze
2315light breeze
2415light breeze
2515light breeze
2615light breeze
2715light breeze
2815light breeze
2915light breeze
3015light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 36 min at the start of September to 12 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 30 minutes over September. Sunrise moves from 6:23 AM to 5:57 AM, and sunset from 6:01 PM to 6:06 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.66:236:01
211.76:226:01
311.76:216:02
411.76:206:02
511.76:196:02
611.76:186:02
711.76:176:02
811.86:176:02
911.86:166:03
1011.86:156:03
1111.86:146:03
1211.86:136:03
1311.86:126:03
1411.96:116:03
1511.96:106:03
1611.96:106:04
1711.96:096:04
1811.96:086:04
1912.06:076:04
2012.06:066:04
2112.06:056:04
2212.06:046:04
2312.06:036:05
2412.06:026:05
2512.16:026:05
2612.16:016:05
2712.16:006:05
2812.15:596:05
2912.15:586:06
3012.15:576:06

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.32 kWh/m².

For context, solar energy here swings from a low near 3.21 kWh/m² to a high of 5.82 kWh/m² in January across the year — September's 5.32 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.0Bright
25.1Bright
35.1Bright
45.1Bright
55.1Bright
65.1Bright
75.2Bright
85.2Bright
95.2Bright
105.2Bright
115.3Bright
125.3Bright
135.3Bright
145.3Bright
155.3Bright
165.4Bright
175.4Bright
185.4Bright
195.4Bright
205.4Bright
215.4Bright
225.4Bright
235.5Bright
245.5Bright
255.5Bright
265.5Bright
275.5Bright
285.5Bright
295.5Bright
305.5Bright
Planning a trip in September

Hazard calendar for Cotoca

In seasonPeak

None of Cotoca's seasonal hazards are active in September. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Cotoca's rainy season runs October–March, when most of the year's rain falls.

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

Is September a good time to visit Cotoca?

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

5.1
Sightseeing
6th-best month of the year
7.2
Beach & pool
2nd-best month of the year

September is a reasonable time to visit Cotoca for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Cotoca in September

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

In September, Cotoca sees daytime highs around 31°C and nights near 20°C. Pack light clothes. Worth having: sun protection. About 7 days see rain.

light clothessun protection

UV index in Cotoca in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Cotoca peaks around January 18 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 12 at about 7 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highVery highExtremeJan 18UV 15Jul 12UV 7
UV index (midday)Level
Jan16Extreme
Feb14Extreme
Mar15Extreme
Apr11Extreme
May9Very high
Jun7Very high
Jul7High
Aug9Very high
Sep10Very high
Oct10Very high
Nov13Extreme
Dec14Extreme

Air quality in Cotoca 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 Cotoca is worst in September — around 37 µg/m³ PM2.5 (poor), about 4.8× the cleanest month (May, 8 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateModerateSep 1935 µg/m³May 138 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb11Good
Mar10Good
Apr8Good
May8Good
Jun9Good
Jul11Good
Aug21Moderate
Sep37Poor
Oct29Moderate
Nov18Moderate
Dec11Good
Location & terrain

Where is Cotoca?

Cotoca sits at 17.8°S, 63.0°W, 387 m above sea level, in Bolivia. The nearest listed city is Santa Cruz, 14 km away.

Villa YapacaníAscención de GuarayosMizqueCamiri

Topography around Cotoca

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

Within 3 km, the terrain around Cotoca has only modest variations in elevation — a maximum elevation change of 24 m around an average of 379 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 105 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,646 m.

The land around Cotoca is covered by grassland (45%) and trees (44%) within 3 km, grassland (37%), trees (31%) and artificial surfaces (22%) within 16 km, and trees (41%), cropland (27%) and grassland (26%) within 80 km.

3 km
24 m
16 km
105 m
80 km
1,646 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Santa Cruz 14 km · Warnes 36 km · El Torno 41 km · Montero 57 km · Villa Yapacaní 95 km · Ascención de Guarayos 214 km · Mizque 243 km · Camiri 252 km

Bolivia travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type A / B / C
230 V · 50 Hz
Prices
≈ 40% of US
price level, 2025
GDP per capita
$5,148
2025
Happiness
5.8 / 10
World Happiness, 2025
Homicide rate
4.4
per 100k, 2023
Road deaths
21.1
per 100k/yr, 2019
Income group
Lower middle
World Bank
English
Moderate
EF EPI 521
Religion
Roman Catholic 65%Protestant 20%none 6%other 5%

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 Cotoca (-17.8167°, -63.05°, elevation 387 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. 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).