Warnes weather in September

In September, Warnes sees average daytime highs of 30°C and overnight lows near 20°C, with 86 mm of rain across 8.2 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 30°C through the month. The sky is clear or mostly clear about 43% of the time in September, and the air most often feels muggy.

Daylight stretches from about 11 h 42 min at the start of September to 12 h 06 min by month's end. Set against the rest of the year, September is Warnes's 3rd-clearest and 3rd-windiest month. For the whole year in context, see Warnes's year-round climate.

Daytime high
30°
5th warmest
Overnight low
20°
5th coldest
Rainfall
86 mm
8.2 wet days
Daylight
11 h 54 min
6:10 AM – 6:04 PM
Cloud cover
52%
3rd clearest
Wind
14 km/h
3rd windiest
Solar energy
5.27 kWh/m²
Travel score
5.2
out of 10

Warnes is city in Bolivia.

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 Warnes 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 35°C. Set against its neighbours, September runs about 2°C warmer than August and on par with October.

10°15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
12919
22919
32919
42919
53019
63019
73019
83019
93019
103020
113020
123020
133020
143020
153020
163020
173020
183020
193020
203020
213020
223020
233020
243020
253020
263020
273020
283121
293121
303121

How September really feels in Warnes

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.

Warnes 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
Jan30° / 23°20922.312.93.4
Feb30° / 22°17619.612.63.6
Mar30° / 22°14518.712.14.0
Apr29° / 20°8613.711.65.1
May26° / 18°7812.411.26.2
Jun25° / 17°6510.8116.7
Jul25° / 16°496.911.17.4
Aug28° / 18°52611.46.9
Sep30° / 20°868.211.95.2
Oct31° / 21°11413.812.44.2
Nov31° / 22°14416.412.83.9
Dec30° / 22°20722.3133.4

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 43% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 17% 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
27030
37030
46832
56832
66733
76733
86634
96535
106436
116436
126337
136238
146238
156040
166040
175842
185842
195743
205644
215545
225446
235446
245347
255248
265050
275149
285050
294951
305050

Chance of precipitation in September

Any precipitation

Warnes gets around 86 mm of rain over 8.2 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 28% and peaks near 36% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
122
222
323
424
524
625
725
826
926
1026
1126
1226
1327
1427
1527
1627
1728
1828
1928
2028
2129
2229
2330
2431
2532
2633
2734
2835
2936
3036

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 28% of days. Sticky, muggy-or-worse air turns up on roughly 47% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
12711192914
22711192914
32711192815
42711192815
52711192815
62711202715
72711202715
82711202715
92711202716
102611202716
112611212716
122511212716
132411212717
142411202717
152311202817
162312202818
172212202818
182212202819
192112202819
202012202820
212012202821
221912202723
231811202724
241711192725
251611192827
261511192828
271411182829
281411182730
291311182731
301211172732

Wind in September

Winds average 14 km/h in September.

Across September, daily wind ranges from about 14 km/h on the calmest days to 14 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
114light breeze
214light breeze
314light breeze
414light breeze
514light breeze
614light breeze
714light breeze
814light breeze
914light breeze
1014light breeze
1114light breeze
1214light breeze
1314light breeze
1414light breeze
1514light breeze
1614light breeze
1714light breeze
1814light breeze
1914light breeze
2014light breeze
2114light breeze
2214light breeze
2314light breeze
2414light breeze
2514light breeze
2614light breeze
2714light breeze
2814light breeze
2914light breeze
3014light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 42 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 24 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)
111.76:236:02
211.76:226:02
311.76:216:02
411.76:206:02
511.76:196:03
611.76:196:03
711.86:186:03
811.86:176:03
911.86:166:03
1011.86:156:03
1111.86:146:03
1211.86:136:04
1311.96:136:04
1411.96:126:04
1511.96:116:04
1611.96:106:04
1711.96:096:04
1811.96:086:04
1912.06:076:04
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 5.27 kWh/m².

For context, solar energy here swings from a low near 3.19 kWh/m² to a high of 5.58 kWh/m² in January across the year — September's 5.27 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
135.2Bright
145.3Bright
155.3Bright
165.3Bright
175.3Bright
185.3Bright
195.3Bright
205.3Bright
215.4Bright
225.4Bright
235.4Bright
245.4Bright
255.4Bright
265.4Bright
275.4Bright
285.4Bright
295.4Bright
305.4Bright
Planning a trip in September

Hazard calendar for Warnes

In seasonPeak

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

Warnes'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 Warnes?

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

5.2
Sightseeing
5th-best month of the year
7.2
Beach & pool
2nd-best month of the year

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

What to pack for Warnes in September

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

In September, Warnes sees daytime highs around 30°C and nights near 20°C. Pack light clothes. Worth having: rain gear and sun protection. About 8 days see rain.

light clothesrain gearsun protection

UV index in Warnes 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 Warnes 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 Warnes 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 Warnes is worst in September — around 52 µg/m³ PM2.5 (poor), about 6.7× the cleanest month (May, 8 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecGoodModeratePoorModerateSep 1749 µg/m³May 118 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb11Good
Mar10Good
Apr8Good
May8Good
Jun10Good
Jul14Moderate
Aug29Moderate
Sep52Poor
Oct33Moderate
Nov17Moderate
Dec10Good
Location & terrain

Where is Warnes?

Warnes sits at 17.5°S, 63.2°W, 340 m above sea level, in Bolivia. The nearest listed city is Montero, 22 km away.

Ascención de GuarayosMizqueSan Ignacio de Velasco

Topography around Warnes

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

Within 3 km, the terrain around Warnes has only modest variations in elevation — a maximum elevation change of 32 m around an average of 335 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 121 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,662 m.

The land around Warnes is covered by grassland (44%), trees (31%) and artificial surfaces (20%) within 3 km, grassland (51%) and trees (28%) within 16 km, and trees (38%), cropland (32%) and grassland (27%) within 80 km.

3 km
32 m
16 km
121 m
80 km
1,662 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Montero 22 km · Santa Cruz 30 km · Cotoca 36 km · El Torno 59 km · Villa Yapacaní 72 km · Ascención de Guarayos 181 km · Mizque 235 km · San Ignacio de Velasco 266 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 Warnes (-17.5163°, -63.1678°, elevation 340 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).