Juliaca weather in September

In September, Juliaca sees average daytime highs of 17°C and overnight lows near 1°C, with 46 mm of precipitation across 10.3 wet days and about 11.9 hours of daylight. It is the 3rd-warmest and 8th-wettest month of the year here.

Day-to-day highs hold fairly steady near 17°C through the month. The sky is clear or mostly clear about 34% 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 Juliaca's 5th-clearest and 3rd-windiest month. For the whole year in context, see Juliaca's year-round climate.

Daytime high: 17°; 3rd warmest
Overnight low: 1°; 5th coldest
Precipitation: 46 mm; 10.3 wet days
Daylight: 11 h 54 min; 5:37 AM – 5:32 PM
Cloud cover: 49%; 5th clearest
Wind: 7 km/h; 3rd windiest
Solar energy: 7.23 kWh/m²
Travel score: 5.8; out of 10

Juliaca is capital city of San Román, Puno, Peru.

Founded: 1926

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

← August Juliaca 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 17°C through the month.

A typical September day in Juliaca reaches about 17°C in the afternoon and slips back to 1°C overnight — a 16°C spread between the day's warmth and the night's chill. On most days the high lands between 15°C and 20°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)	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	17	18	18	18	18	18	18	18	18	18	18	18	18
Avg low (°C)	0	0	0	0	0	1	1	1	1	1	1	1	1	1	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2	2

	Avg high (°C)	Avg low (°C)
1	17	0
2	17	0
3	17	0
4	17	0
5	17	0
6	17	1
7	17	1
8	17	1
9	17	1
10	17	1
11	17	1
12	17	1
13	17	1
14	17	1
15	17	2
16	17	2
17	17	2
18	17	2
19	18	2
20	18	2
21	18	2
22	18	2
23	18	2
24	18	2
25	18	2
26	18	2
27	18	2
28	18	2
29	18	2
30	18	2

How September really feels in Juliaca

Once humidity and wind are folded in, September averages 0 days that feel above 32°C and 22 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C

heat index over the day's high

Days feeling ≤ 0°C

wind chill below the day's low

The story in September is cold — wind chill drags the overnight "feels like" below the raw low.

Juliaca weather by month

How September compares with the rest of the year at a glance. September is the 3rd-warmest and 8th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Snow days	Daylight (hours)	Travel score
Jan	15° / 5°	193	26.3	0.8	12.8	2.7
Feb	15° / 5°	181	23.7	0.3	12.5	2.6
Mar	15° / 5°	151	25.2	0.6	12.1	2.9
Apr	15° / 3°	75	15.8	0.2	11.7	4.0
May	16° / -1°	22	5.4	0.1	11.3	5.7
Jun	16° / -2°	7	1.7	0.2	11.1	6.2
Jul	16° / -3°	7	2	0.1	11.2	6.3
Aug	17° / -1°	18	4.8	0.4	11.5	6.3
Sep	17° / 1°	46	10.3	0.5	11.9	5.8
Oct	18° / 3°	78	14.3	0.9	12.4	5.2
Nov	18° / 4°	76	14.1	0.5	12.7	5.0
Dec	16° / 5°	140	21.7	0.5	12.9	3.6

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 34% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 30% of September, with mostly cloudy or overcast conditions the remaining 36%. 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 (%)	76	76	76	75	75	74	73	72	71	70	68	67	65	64	63	61	61	59	59	58	57	56	55	55	54	55	54	54	54	53
Cloudier (%)	24	24	24	25	25	26	27	28	29	30	32	33	35	36	37	39	39	41	41	42	43	44	45	45	46	45	46	46	46	47

	Clearer (%)	Cloudier (%)
1	76	24
2	76	24
3	76	24
4	75	25
5	75	25
6	74	26
7	73	27
8	72	28
9	71	29
10	70	30
11	68	32
12	67	33
13	65	35
14	64	36
15	63	37
16	61	39
17	61	39
18	59	41
19	59	41
20	58	42
21	57	43
22	56	44
23	55	45
24	55	45
25	54	46
26	55	45
27	54	46
28	54	46
29	54	46
30	53	47

Chance of precipitation in September

Any precipitationSnow

Juliaca gets around 46 mm of rain and snow over 10.3 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 34% and peaks near 40% on the wettest days, and about 1 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 (%)	24	25	26	27	27	28	29	30	30	31	31	32	32	33	34	35	35	36	37	37	38	38	39	39	39	40	40	40	40	40
Snow chance (%)	1	1	1	1	1	1	1	1	1	1	1	1	2	2	2	2	2	2	2	2	2	3	3	3	3	3	3	2	2	2

	Rain chance (%)	Snow chance (%)
1	24	1
2	25	1
3	26	1
4	27	1
5	27	1
6	28	1
7	29	1
8	30	1
9	30	1
10	31	1
11	31	1
12	32	1
13	32	2
14	33	2
15	34	2
16	35	2
17	35	2
18	36	2
19	37	2
20	37	2
21	38	2
22	38	3
23	39	3
24	39	3
25	39	3
26	40	3
27	40	3
28	40	2
29	40	2
30	40	2

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 7 km/h in September.

Across September, daily wind ranges from about 7 km/h on the calmest days to 7 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)	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	7	7	7
Feels	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm

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

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 5:49 AM to 5:26 AM, and sunset from 5:31 PM to 5:34 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	11.8	11.8	11.8	11.8	11.8	11.8	11.8	11.9	11.9	11.9	11.9	11.9	11.9	11.9	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.1	12.1	12.1	12.1	12.1
Sunrise (AM)	5:49	5:49	5:48	5:47	5:46	5:46	5:45	5:44	5:43	5:42	5:42	5:41	5:40	5:39	5:38	5:37	5:37	5:36	5:35	5:34	5:33	5:33	5:32	5:31	5:30	5:29	5:29	5:28	5:27	5:26
Sunset (PM)	5:31	5:31	5:31	5:31	5:31	5:32	5:32	5:32	5:32	5:32	5:32	5:32	5:32	5:32	5:32	5:32	5:32	5:32	5:33	5:33	5:33	5:33	5:33	5:33	5:33	5:33	5:33	5:33	5:33	5:34

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	11.7	5:49	5:31
2	11.7	5:49	5:31
3	11.7	5:48	5:31
4	11.7	5:47	5:31
5	11.8	5:46	5:31
6	11.8	5:46	5:32
7	11.8	5:45	5:32
8	11.8	5:44	5:32
9	11.8	5:43	5:32
10	11.8	5:42	5:32
11	11.8	5:42	5:32
12	11.9	5:41	5:32
13	11.9	5:40	5:32
14	11.9	5:39	5:32
15	11.9	5:38	5:32
16	11.9	5:37	5:32
17	11.9	5:37	5:32
18	11.9	5:36	5:32
19	12.0	5:35	5:33
20	12.0	5:34	5:33
21	12.0	5:33	5:33
22	12.0	5:33	5:33
23	12.0	5:32	5:33
24	12.0	5:31	5:33
25	12.0	5:30	5:33
26	12.1	5:29	5:33
27	12.1	5:29	5:33
28	12.1	5:28	5:33
29	12.1	5:27	5:33
30	12.1	5:26	5:34

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 7.23 kWh/m².

For context, solar energy here swings from a low near 5.58 kWh/m² to a high of 8 kWh/m² in November across the year — September's 7.23 kWh/m² falls in the middle.

	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	7.0	7.0	7.0	7.0	7.1	7.1	7.1	7.1	7.2	7.2	7.2	7.2	7.3	7.3	7.3	7.3	7.3	7.4	7.4	7.4	7.4	7.5	7.5	7.5	7.5	7.6	7.6
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	7.0	Intense
5	7.0	Intense
6	7.0	Intense
7	7.0	Intense
8	7.1	Intense
9	7.1	Intense
10	7.1	Intense
11	7.1	Intense
12	7.2	Intense
13	7.2	Intense
14	7.2	Intense
15	7.2	Intense
16	7.3	Intense
17	7.3	Intense
18	7.3	Intense
19	7.3	Intense
20	7.3	Intense
21	7.4	Intense
22	7.4	Intense
23	7.4	Intense
24	7.4	Intense
25	7.5	Intense
26	7.5	Intense
27	7.5	Intense
28	7.5	Intense
29	7.6	Intense
30	7.6	Intense

Planning a trip in September

Hazard calendar for Juliaca

In seasonPeak

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

Juliaca'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 Juliaca?

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

5.8

Sightseeing

4th-best month of the year

1.6

Beach & pool

2nd-best month of the year

September is a reasonable time to visit Juliaca for sightseeing.

What to pack for Juliaca in September

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

In September, Juliaca sees daytime highs around 17°C and nights near 1°C. Pack sun protection. Worth having: a warm layer and rain gear. About 10 days see rain.

sun protectiona warm layerrain gear

UV index in Juliaca 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 Juliaca peaks around February 9 at about 19 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 23 at about 10 (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	17	14	11	10	10	13	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	17	Extreme
Apr	14	Extreme
May	11	Extreme
Jun	10	Very high
Jul	10	Very high
Aug	13	Extreme
Sep	14	Extreme
Oct	16	Extreme
Nov	17	Extreme
Dec	17	Extreme

Location & terrain

Where is Juliaca?

Juliaca sits at 15.5°S, 70.1°W, 3,834 m above sea level, in Peru. The nearest listed city is San Miguel, 3.0 km away.

Topography around Juliaca

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

Within 3 km, the terrain around Juliaca has significant variations in elevation — a maximum elevation change of 271 m around an average of 3,847 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 501 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,579 m.

The land around Juliaca is covered by artificial surfaces (67%) and grassland (25%) within 3 km, grassland (51%) and cropland (39%) within 16 km, and grassland (67%) within 80 km.

3 km

271 m

artificial surfaces 67%

16 km

501 m

grassland 51%

80 km

1,579 m

grassland 67%

grasslandcroplandartificial surfacesbare terrainwaterwetland

← August Juliaca year-round climate October →Best places to visit in September

September weather nearby: San Miguel 3.0 km · Puno 40 km · Ilave 82 km · Ayaviri 84 km · Isla del Sol 121 km · La Rinconada 122 km · Copacabana 135 km · Yauri 158 km

Peru travel facts

Travel advisory: Level 2; Exercise Increased Caution
Power plugs: Type A / B / C; 220 V · 60 Hz
Prices: ≈ 51% of US; price level, 2025
GDP per capita: $9,684; 2025
Happiness: 6.0 / 10; World Happiness, 2025
Safe drinking water: 49%; of population, 2024
Homicide rate: 8.6; per 100k, 2021
Road deaths: 13.6; per 100k/yr, 2019
Income group: Upper middle; World Bank
English: Moderate; EF EPI 519
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 Juliaca (-15.5°, -70.1333°, elevation 3,834 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	17	0
2	17	0
3	17	0
4	17	0
5	17	0
6	17	1
7	17	1
8	17	1
9	17	1
10	17	1
11	17	1
12	17	1
13	17	1
14	17	1
15	17	2
16	17	2
17	17	2
18	17	2
19	18	2
20	18	2
21	18	2
22	18	2
23	18	2
24	18	2
25	18	2
26	18	2
27	18	2
28	18	2
29	18	2
30	18	2

	Clearer (%)	Cloudier (%)
1	76	24
2	76	24
3	76	24
4	75	25
5	75	25
6	74	26
7	73	27
8	72	28
9	71	29
10	70	30
11	68	32
12	67	33
13	65	35
14	64	36
15	63	37
16	61	39
17	61	39
18	59	41
19	59	41
20	58	42
21	57	43
22	56	44
23	55	45
24	55	45
25	54	46
26	55	45
27	54	46
28	54	46
29	54	46
30	53	47

	Rain chance (%)	Snow chance (%)
1	24	1
2	25	1
3	26	1
4	27	1
5	27	1
6	28	1
7	29	1
8	30	1
9	30	1
10	31	1
11	31	1
12	32	1
13	32	2
14	33	2
15	34	2
16	35	2
17	35	2
18	36	2
19	37	2
20	37	2
21	38	2
22	38	3
23	39	3
24	39	3
25	39	3
26	40	3
27	40	3
28	40	2
29	40	2
30	40	2

	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	17	0
2	17	0
3	17	0
4	17	0
5	17	0
6	17	1
7	17	1
8	17	1
9	17	1
10	17	1
11	17	1
12	17	1
13	17	1
14	17	1
15	17	2
16	17	2
17	17	2
18	17	2
19	18	2
20	18	2
21	18	2
22	18	2
23	18	2
24	18	2
25	18	2
26	18	2
27	18	2
28	18	2
29	18	2
30	18	2

	Clearer (%)	Cloudier (%)
1	76	24
2	76	24
3	76	24
4	75	25
5	75	25
6	74	26
7	73	27
8	72	28
9	71	29
10	70	30
11	68	32
12	67	33
13	65	35
14	64	36
15	63	37
16	61	39
17	61	39
18	59	41
19	59	41
20	58	42
21	57	43
22	56	44
23	55	45
24	55	45
25	54	46
26	55	45
27	54	46
28	54	46
29	54	46
30	53	47

	Rain chance (%)	Snow chance (%)
1	24	1
2	25	1
3	26	1
4	27	1
5	27	1
6	28	1
7	29	1
8	30	1
9	30	1
10	31	1
11	31	1
12	32	1
13	32	2
14	33	2
15	34	2
16	35	2
17	35	2
18	36	2
19	37	2
20	37	2
21	38	2
22	38	3
23	39	3
24	39	3
25	39	3
26	40	3
27	40	3
28	40	2
29	40	2
30	40	2

	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	17	0
2	17	0
3	17	0
4	17	0
5	17	0
6	17	1
7	17	1
8	17	1
9	17	1
10	17	1
11	17	1
12	17	1
13	17	1
14	17	1
15	17	2
16	17	2
17	17	2
18	17	2
19	18	2
20	18	2
21	18	2
22	18	2
23	18	2
24	18	2
25	18	2
26	18	2
27	18	2
28	18	2
29	18	2
30	18	2

	Clearer (%)	Cloudier (%)
1	76	24
2	76	24
3	76	24
4	75	25
5	75	25
6	74	26
7	73	27
8	72	28
9	71	29
10	70	30
11	68	32
12	67	33
13	65	35
14	64	36
15	63	37
16	61	39
17	61	39
18	59	41
19	59	41
20	58	42
21	57	43
22	56	44
23	55	45
24	55	45
25	54	46
26	55	45
27	54	46
28	54	46
29	54	46
30	53	47

	Rain chance (%)	Snow chance (%)
1	24	1
2	25	1
3	26	1
4	27	1
5	27	1
6	28	1
7	29	1
8	30	1
9	30	1
10	31	1
11	31	1
12	32	1
13	32	2
14	33	2
15	34	2
16	35	2
17	35	2
18	36	2
19	37	2
20	37	2
21	38	2
22	38	3
23	39	3
24	39	3
25	39	3
26	40	3
27	40	3
28	40	2
29	40	2
30	40	2

	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