Isla del Sol weather in September

In September, Isla del Sol sees average daytime highs of 12°C and overnight lows near 7°C, with 40 mm of precipitation across 8.8 wet days and about 11.9 hours of daylight. It is the 7th-warmest and 8th-wettest month of the year here.

Day-to-day highs hold fairly steady near 12°C through the month. The sky is clear or mostly clear about 61% of the time in September, and the air most often feels dry.

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 Isla del Sol's 4th-clearest and 1st-windiest month. For the whole year in context, see Isla del Sol's year-round climate.

Daytime high: 12°; 7th warmest
Overnight low: 7°; 3rd coldest
Precipitation: 40 mm; 8.8 wet days
Daylight: 11 h 54 min; 6:34 AM – 6:28 PM
Cloud cover: 36%; 4th clearest
Wind: 13 km/h; 1st windiest
Solar energy: 7.2 kWh/m²
Travel score: 3.3; out of 10

Isla del Sol is village on Isla del Sol, Bolivia.

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

← August Isla del Sol year-round climate October →Best places to visit in September

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 12°C through the month.

A typical September day in Isla del Sol reaches about 12°C in the afternoon and slips back to 7°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 10°C and 13°C. Set against its neighbours, September runs on par with August and on par with October.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Avg high (°C)	11	11	11	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12
Avg low (°C)	6	6	6	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7

	Avg high (°C)	Avg low (°C)
1	11	6
2	11	6
3	11	6
4	12	7
5	12	7
6	12	7
7	12	7
8	12	7
9	12	7
10	12	7
11	12	7
12	12	7
13	12	7
14	12	7
15	12	7
16	12	7
17	12	7
18	12	7
19	12	7
20	12	7
21	12	7
22	12	7
23	12	7
24	12	7
25	12	7
26	12	7
27	12	7
28	12	7
29	12	7
30	12	7

Isla del Sol weather by month

How September compares with the rest of the year at a glance. September is the 7th-warmest and 8th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	12° / 8°	280	29.3	12.8	1.7
Feb	12° / 8°	250	25.6	12.5	1.7
Mar	12° / 8°	211	27	12.1	1.9
Apr	12° / 8°	95	16.9	11.6	2.6
May	12° / 7°	28	6.6	11.3	3.5
Jun	11° / 7°	12	3	11.1	3.5
Jul	11° / 6°	14	3.3	11.1	3.3
Aug	11° / 6°	16	4.2	11.5	3.4
Sep	12° / 7°	40	8.8	11.9	3.3
Oct	12° / 7°	76	13.6	12.4	3.2
Nov	13° / 8°	91	15.8	12.7	3.1
Dec	13° / 8°	201	25	12.9	2.2

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 61% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 18% of September, with mostly cloudy or overcast conditions the remaining 21%. Skies tend to cloud over as the month goes on.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Clearer (%)	89	89	88	88	87	86	86	85	85	83	83	81	81	80	79	78	77	76	76	75	74	74	73	73	73	72	71	71	71	70
Cloudier (%)	11	11	12	12	13	14	14	15	15	17	17	19	19	20	21	22	23	24	24	25	26	26	27	27	27	28	29	29	29	30

	Clearer (%)	Cloudier (%)
1	89	11
2	89	11
3	88	12
4	88	12
5	87	13
6	86	14
7	86	14
8	85	15
9	85	15
10	83	17
11	83	17
12	81	19
13	81	19
14	80	20
15	79	21
16	78	22
17	77	23
18	76	24
19	76	24
20	75	25
21	74	26
22	74	26
23	73	27
24	73	27
25	73	27
26	72	28
27	71	29
28	71	29
29	71	29
30	70	30

Chance of precipitation in September

Any precipitation

Isla del Sol gets around 40 mm of rain and snow over 8.8 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 29% and peaks near 37% on the wettest days, and about 0 day brings snow. The odds climb toward the end of the month.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Rain chance (%)	18	19	19	20	21	22	23	24	25	25	26	27	28	28	29	30	31	31	32	33	33	34	34	35	35	35	36	36	37	37

	Rain chance (%)
1	18
2	19
3	19
4	20
5	21
6	22
7	23
8	24
9	25
10	25
11	26
12	27
13	28
14	28
15	29
16	30
17	31
18	31
19	32
20	33
21	33
22	34
23	34
24	35
25	35
26	35
27	36
28	36
29	37
30	37

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the dry band about 100% of days. It rarely turns muggy — the humid and sticky bands barely register.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Dry (%)	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100

Wind in September

Winds average 13 km/h in September, the windiest month of the year.

Across September, daily wind ranges from about 13 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Wind speed (km/h)	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13
Feels	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze

	Wind speed (km/h)	Feels
1	13	light breeze
2	13	light breeze
3	13	light breeze
4	13	light breeze
5	13	light breeze
6	13	light breeze
7	13	light breeze
8	13	light breeze
9	13	light breeze
10	13	light breeze
11	13	light breeze
12	13	light breeze
13	13	light breeze
14	13	light breeze
15	13	light breeze
16	13	light breeze
17	13	light breeze
18	13	light breeze
19	13	light breeze
20	13	light breeze
21	13	light breeze
22	13	light breeze
23	13	light breeze
24	13	light breeze
25	13	light breeze
26	13	light breeze
27	13	light breeze
28	13	light breeze
29	13	light breeze
30	13	light 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 6:46 AM to 6:22 AM, and sunset from 6:27 PM to 6:30 PM.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Daylight (h)	11.7	11.7	11.7	11.7	11.7	11.8	11.8	11.8	11.8	11.8	11.8	11.8	11.9	11.9	11.9	11.9	11.9	11.9	12.0	12.0	12.0	12.0	12.0	12.0	12.1	12.1	12.1	12.1	12.1	12.1
Sunrise (AM)	6:46	6:45	6:44	6:43	6:43	6:42	6:41	6:40	6:39	6:39	6:38	6:37	6:36	6:35	6:34	6:34	6:33	6:32	6:31	6:30	6:29	6:29	6:28	6:27	6:26	6:25	6:24	6:24	6:23	6:22
Sunset (PM)	6:27	6:27	6:27	6:27	6:27	6:27	6:27	6:28	6:28	6:28	6:28	6:28	6:28	6:28	6:28	6:28	6:28	6:28	6:29	6:29	6:29	6:29	6:29	6:29	6:29	6:29	6:29	6:29	6:30	6:30

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	11.7	6:46	6:27
2	11.7	6:45	6:27
3	11.7	6:44	6:27
4	11.7	6:43	6:27
5	11.7	6:43	6:27
6	11.8	6:42	6:27
7	11.8	6:41	6:27
8	11.8	6:40	6:28
9	11.8	6:39	6:28
10	11.8	6:39	6:28
11	11.8	6:38	6:28
12	11.8	6:37	6:28
13	11.9	6:36	6:28
14	11.9	6:35	6:28
15	11.9	6:34	6:28
16	11.9	6:34	6:28
17	11.9	6:33	6:28
18	11.9	6:32	6:28
19	12.0	6:31	6:29
20	12.0	6:30	6:29
21	12.0	6:29	6:29
22	12.0	6:29	6:29
23	12.0	6:28	6:29
24	12.0	6:27	6:29
25	12.1	6:26	6:29
26	12.1	6:25	6:29
27	12.1	6:24	6:29
28	12.1	6:24	6:29
29	12.1	6:23	6:30
30	12.1	6:22	6:30

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 7.2 kWh/m².

For context, solar energy here swings from a low near 5.44 kWh/m² to a high of 7.83 kWh/m² in November across the year — September's 7.2 kWh/m² sits near the top of that range.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Solar energy (kWh/m²)	6.9	6.9	6.9	6.9	7.0	7.0	7.0	7.0	7.0	7.1	7.1	7.1	7.1	7.2	7.2	7.2	7.2	7.2	7.3	7.3	7.3	7.3	7.4	7.4	7.4	7.4	7.5	7.5	7.5	7.5
Level	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense

	Solar energy (kWh/m²)	Level
1	6.9	Intense
2	6.9	Intense
3	6.9	Intense
4	6.9	Intense
5	7.0	Intense
6	7.0	Intense
7	7.0	Intense
8	7.0	Intense
9	7.0	Intense
10	7.1	Intense
11	7.1	Intense
12	7.1	Intense
13	7.1	Intense
14	7.2	Intense
15	7.2	Intense
16	7.2	Intense
17	7.2	Intense
18	7.2	Intense
19	7.3	Intense
20	7.3	Intense
21	7.3	Intense
22	7.3	Intense
23	7.4	Intense
24	7.4	Intense
25	7.4	Intense
26	7.4	Intense
27	7.5	Intense
28	7.5	Intense
29	7.5	Intense
30	7.5	Intense

Planning a trip in September

Hazard calendar for Isla del Sol

In seasonPeak

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

Isla del Sol's monsoon runs December–March, when most of the year's rain falls.

Monsoon

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Is September a good time to visit Isla del Sol?

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

3.3

Sightseeing

4th-best month of the year

—

Beach & pool

never really warm enough

September is a weaker month for outdoor sightseeing in Isla del Sol.

What to pack for Isla del Sol in September

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

In September, Isla del Sol sees daytime highs around 12°C and nights near 7°C. Pack a warm layer and sun protection. Worth having: rain gear. About 9 days see rain.

a warm layersun protectionrain gear

UV index in Isla del Sol in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 14 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Isla del Sol peaks around February 8 at about 19 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 23 at about 9 (very high).

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

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	19	19	16	14	11	9	9	12	14	16	17	17
Level	Extreme	Extreme	Extreme	Extreme	Extreme	Very high	Very high	Extreme	Extreme	Extreme	Extreme	Extreme

	UV index (midday)	Level
Jan	19	Extreme
Feb	19	Extreme
Mar	16	Extreme
Apr	14	Extreme
May	11	Extreme
Jun	9	Very high
Jul	9	Very high
Aug	12	Extreme
Sep	14	Extreme
Oct	16	Extreme
Nov	17	Extreme
Dec	17	Extreme

Location & terrain

Where is Isla del Sol?

Isla del Sol sits at 16.0°S, 69.1°W, 0 m above sea level, in Bolivia. The nearest listed city is Copacabana, 17 km away.

Topography around Isla del Sol

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

Within 3 km, the terrain around Isla del Sol has significant variations in elevation — a maximum elevation change of 250 m around an average of 3,837 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 581 m; within 80 km, extreme variations in elevation — a maximum elevation change of 5,093 m.

The land around Isla del Sol is covered by water (71%) and grassland (25%) within 3 km, water (91%) within 16 km, and grassland (54%) and water (32%) within 80 km.

3 km

250 m

water 71%

16 km

581 m

water 91%

80 km

5,093 m

grassland 54%

treesgrasslandcroplandbare terrainsnow and icewaterwetland

← August Isla del Sol year-round climate October →Best places to visit in September

September weather nearby: Copacabana 17 km · Ilave 56 km · Sorata 61 km · Tiahuanaco 76 km · Puno 96 km · Laja 99 km · Viacha 113 km · La Paz 118 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

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 Isla del Sol (-16.0357°, -69.1484°, 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. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).

	Avg high (°C)	Avg low (°C)
1	11	6
2	11	6
3	11	6
4	12	7
5	12	7
6	12	7
7	12	7
8	12	7
9	12	7
10	12	7
11	12	7
12	12	7
13	12	7
14	12	7
15	12	7
16	12	7
17	12	7
18	12	7
19	12	7
20	12	7
21	12	7
22	12	7
23	12	7
24	12	7
25	12	7
26	12	7
27	12	7
28	12	7
29	12	7
30	12	7

	Clearer (%)	Cloudier (%)
1	89	11
2	89	11
3	88	12
4	88	12
5	87	13
6	86	14
7	86	14
8	85	15
9	85	15
10	83	17
11	83	17
12	81	19
13	81	19
14	80	20
15	79	21
16	78	22
17	77	23
18	76	24
19	76	24
20	75	25
21	74	26
22	74	26
23	73	27
24	73	27
25	73	27
26	72	28
27	71	29
28	71	29
29	71	29
30	70	30

	Rain chance (%)
1	18
2	19
3	19
4	20
5	21
6	22
7	23
8	24
9	25
10	25
11	26
12	27
13	28
14	28
15	29
16	30
17	31
18	31
19	32
20	33
21	33
22	34
23	34
24	35
25	35
26	35
27	36
28	36
29	37
30	37

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100

	Avg high (°C)	Avg low (°C)
1	11	6
2	11	6
3	11	6
4	12	7
5	12	7
6	12	7
7	12	7
8	12	7
9	12	7
10	12	7
11	12	7
12	12	7
13	12	7
14	12	7
15	12	7
16	12	7
17	12	7
18	12	7
19	12	7
20	12	7
21	12	7
22	12	7
23	12	7
24	12	7
25	12	7
26	12	7
27	12	7
28	12	7
29	12	7
30	12	7

	Clearer (%)	Cloudier (%)
1	89	11
2	89	11
3	88	12
4	88	12
5	87	13
6	86	14
7	86	14
8	85	15
9	85	15
10	83	17
11	83	17
12	81	19
13	81	19
14	80	20
15	79	21
16	78	22
17	77	23
18	76	24
19	76	24
20	75	25
21	74	26
22	74	26
23	73	27
24	73	27
25	73	27
26	72	28
27	71	29
28	71	29
29	71	29
30	70	30

	Rain chance (%)
1	18
2	19
3	19
4	20
5	21
6	22
7	23
8	24
9	25
10	25
11	26
12	27
13	28
14	28
15	29
16	30
17	31
18	31
19	32
20	33
21	33
22	34
23	34
24	35
25	35
26	35
27	36
28	36
29	37
30	37

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100

	Avg high (°C)	Avg low (°C)
1	11	6
2	11	6
3	11	6
4	12	7
5	12	7
6	12	7
7	12	7
8	12	7
9	12	7
10	12	7
11	12	7
12	12	7
13	12	7
14	12	7
15	12	7
16	12	7
17	12	7
18	12	7
19	12	7
20	12	7
21	12	7
22	12	7
23	12	7
24	12	7
25	12	7
26	12	7
27	12	7
28	12	7
29	12	7
30	12	7

	Clearer (%)	Cloudier (%)
1	89	11
2	89	11
3	88	12
4	88	12
5	87	13
6	86	14
7	86	14
8	85	15
9	85	15
10	83	17
11	83	17
12	81	19
13	81	19
14	80	20
15	79	21
16	78	22
17	77	23
18	76	24
19	76	24
20	75	25
21	74	26
22	74	26
23	73	27
24	73	27
25	73	27
26	72	28
27	71	29
28	71	29
29	71	29
30	70	30

	Rain chance (%)
1	18
2	19
3	19
4	20
5	21
6	22
7	23
8	24
9	25
10	25
11	26
12	27
13	28
14	28
15	29
16	30
17	31
18	31
19	32
20	33
21	33
22	34
23	34
24	35
25	35
26	35
27	36
28	36
29	37
30	37

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100