Santa Cruz weather in September

In September, Santa Cruz sees average daytime highs of 30°C and overnight lows near 20°C, with 66 mm of rain across 7 wet days and about 11.9 hours of daylight. It is the 6th-warmest and 7th-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 44% 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 Santa Cruz's 3rd-clearest and 4th-windiest month. For the whole year in context, see Santa Cruz's year-round climate.

Daytime high
30°
6th warmest
Overnight low
20°
5th coldest
Rainfall
66 mm
7 wet days
Daylight
11 h 54 min
6:10 AM – 6:04 PM
Cloud cover
51%
3rd clearest
Wind
15 km/h
4th windiest
Solar energy
5.28 kWh/m²
Travel score
5.5
out of 10

Santa Cruz is city in eastern Bolivia.

Density
3,423/km²
people per km²
Founded
1561

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 30°C through the month.

A typical September day in Santa Cruz reaches about 30°C in the afternoon and slips back to 20°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 24°C and 34°C. Set against its neighbours, September runs about 2°C warmer than August and about 1°C cooler than October.

10°15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
12919
22919
32919
42919
52919
62919
72919
82919
92919
103019
113019
123019
133020
143020
153020
163020
173020
183020
193020
203020
213020
223020
233020
243020
253020
263020
273020
283020
293020
303020

How September really feels in Santa Cruz

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.

Santa Cruz weather by month

How September compares with the rest of the year at a glance. September is the 6th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 22°17218.112.93.8
Feb30° / 22°13916.712.64.0
Mar30° / 22°11814.612.14.4
Apr29° / 20°6510.711.65.6
May26° / 18°6110.411.26.6
Jun24° / 17°538.9117.0
Jul25° / 16°446.1117.6
Aug28° / 18°445.311.47.1
Sep30° / 20°66711.95.5
Oct31° / 21°8510.512.44.5
Nov31° / 22°11813.112.84.2
Dec30° / 22°16517.8133.8

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 44% 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 40%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17129
27129
37129
47030
57030
66832
76733
86733
96535
106535
116436
126337
136238
146139
156040
165941
175941
185842
195743
205644
215545
225545
235446
245248
255248
265149
275050
284951
295050
304951

Chance of precipitation in September

Any precipitation

Santa Cruz gets around 66 mm of rain over 7 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 24% and peaks near 29% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%151015202530
Rain chance (%)
117
218
319
419
520
621
721
822
922
1023
1123
1223
1323
1423
1523
1624
1724
1824
1924
2024
2125
2225
2326
2426
2527
2628
2728
2829
2929
3029

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 41% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1301223305
2301222306
3301222306
4301222306
5301221306
6311221306
7311221306
8301221307
9301221307
10301222307
11291222307
12291222307
13281222308
14281223308
15271223308
16261323308
17261323308
18251323309
19241323319
20241323319
212313233110
222213233211
232113223212
242013223312
251913223313
261812223414
271712213415
281712213416
291612203517
301512203518

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 5:58 AM, and sunset from 6:02 PM to 6:06 PM.

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

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.28 kWh/m².

For context, solar energy here swings from a low near 3.16 kWh/m² to a high of 5.78 kWh/m² in January across the year — September's 5.28 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.0Bright
25.0Bright
35.0Bright
45.1Bright
55.1Bright
65.1Bright
75.1Bright
85.1Bright
95.2Bright
105.2Bright
115.2Bright
125.2Bright
135.3Bright
145.3Bright
155.3Bright
165.3Bright
175.3Bright
185.3Bright
195.4Bright
205.4Bright
215.4Bright
225.4Bright
235.4Bright
245.4Bright
255.4Bright
265.4Bright
275.4Bright
285.4Bright
295.4Bright
305.5Bright
Planning a trip in September

Hazard calendar for Santa Cruz

In seasonPeak

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

Santa Cruz'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 Santa Cruz?

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

5.5
Sightseeing
6th-best month of the year
7.4
Beach & pool
2nd-best month of the year

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

What to pack for Santa Cruz in September

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

In September, Santa Cruz sees daytime highs around 30°C and nights near 20°C. Pack light clothes. Worth having: sun protection. About 7 days see rain.

light clothessun protection

UV index in Santa Cruz in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Santa Cruz peaks around January 18 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 14 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 14UV 7
UV index (midday)Level
Jan15Extreme
Feb14Extreme
Mar14Extreme
Apr11Extreme
May9Very high
Jun7Very high
Jul7High
Aug8Very high
Sep9Very high
Oct8Very high
Nov13Extreme
Dec14Extreme

Air quality in Santa Cruz 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 Santa Cruz 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 Santa Cruz?

Santa Cruz sits at 17.8°S, 63.2°W, 433 m above sea level, in Bolivia. The nearest listed city is Cotoca, 14 km away.

Ascención de GuarayosMizqueCamiri

Topography around Santa Cruz

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

Within 3 km, the terrain around Santa Cruz has only modest variations in elevation — a maximum elevation change of 29 m around an average of 414 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 171 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,022 m.

The land around Santa Cruz is covered by artificial surfaces (89%) within 3 km, trees (36%), grassland (29%) and artificial surfaces (29%) within 16 km, and trees (47%), grassland (25%) and cropland (24%) within 80 km.

3 km
29 m
16 km
171 m
80 km
2,022 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Cotoca 14 km · Warnes 30 km · El Torno 32 km · Montero 50 km · Villa Yapacaní 81 km · Ascención de Guarayos 211 km · Mizque 229 km · Camiri 253 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 Santa Cruz (-17.7863°, -63.1812°, elevation 433 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).