Junín weather in September

In September, Junín sees average daytime highs of 10°C and overnight lows near -1°C, with 93 mm of precipitation across 23.7 wet days and about 11.9 hours of daylight. It is the 9th-warmest and 8th-wettest month of the year here.

Day-to-day highs hold fairly steady near 10°C through the month. The sky is clear or mostly clear about 11% of the time in September, and the air most often feels dry.

Daylight stretches from about 11 h 48 min at the start of September to 12 h 06 min by month's end. Set against the rest of the year, September is Junín's 5th-clearest and 3rd-windiest month. For the whole year in context, see Junín's year-round climate.

Daytime high
10°
9th warmest
Overnight low
-1°
4th coldest
Precipitation
93 mm
23.7 wet days
Daylight
11 h 54 min
6:00 AM – 5:56 PM
Cloud cover
68%
5th clearest
Wind
6 km/h
3rd windiest
Solar energy
6.4 kWh/m²
Travel score
1.4
out of 10

Junín is capital city of Junín, Peru.

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 10°C through the month.

A typical September day in Junín reaches about 10°C in the afternoon and slips back to -1°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 8°C and 12°C. Set against its neighbours, September runs on par with August and on par with October.

-5°10°15°151015202530
Avg high (°C)Avg low (°C)
110-1
210-1
310-1
410-1
510-1
610-1
710-1
810-1
910-1
1010-1
1110-1
1210-1
1310-1
1410-1
1510-1
1610-1
1710-1
1810-1
1910-1
20100
21100
22100
23100
24100
25100
26100
27100
28100
29100
30100

How September really feels in Junín

Once humidity and wind are folded in, September averages 0 days that feel above 32°C and 30 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
30
wind chill below the day's low

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

Junín weather by month

How September compares with the rest of the year at a glance. September is the 9th-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan10° / 203288.512.61.4
Feb10° / 20626.68.212.41.3
Mar10° / 20029.37.212.11.3
Apr10° / 11025311.81.4
May10° / -1°6219.51.811.51.8
Jun10° / -2°3311.61.511.42.0
Jul / -2°32112.711.42.0
Aug / -2°5115.9411.61.8
Sep10° / -1°9323.75.111.91.4
Oct10° / 13826.96.112.31.4
Nov11° / 14824.95.212.51.6
Dec11° / 19627.7812.61.5

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 11% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 21% of September, with mostly cloudy or overcast conditions the remaining 69%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15149
24951
34852
44852
54753
64456
74357
84159
93961
103763
113565
123466
133268
143169
152971
162872
172674
182575
192377
202278
212179
222179
232080
242080
252080
262080
272080
282080
292080
301981

Chance of precipitation in September

Any precipitationSnow

Junín gets around 93 mm of rain and snow over 23.7 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 78% and peaks near 87% on the wettest days, and about 5 days bring snow. The odds climb toward the end of the month.

0%20%40%60%80%100%151015202530
Rain chance (%)Snow chance (%)
16613
26713
36713
46813
56914
67014
77114
87215
97315
107416
117516
127617
137617
147818
157918
168018
178119
188219
198319
208319
218420
228520
238520
248520
258619
268619
278619
288720
298720
308720

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.

0%25%50%75%100%151015202530
Dry (%)
1100
2100
3100
4100
5100
6100
7100
8100
9100
10100
11100
12100
13100
14100
15100
16100
17100
18100
19100
20100
21100
22100
23100
24100
25100
26100
27100
28100
29100
30100

Wind in September

Winds average 6 km/h in September.

Across September, daily wind ranges from about 6 km/h on the calmest days to 6 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 48 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 18 minutes over September. Sunrise moves from 6:10 AM to 5:51 AM, and sunset from 5:57 PM to 5:56 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.86:105:57
211.86:105:57
311.86:095:57
411.86:085:57
511.86:085:57
611.86:075:57
711.86:065:57
811.96:065:57
911.96:055:57
1011.96:045:57
1111.96:045:57
1211.96:035:57
1311.96:025:57
1411.96:025:57
1511.96:015:57
1611.96:005:56
1711.95:595:56
1812.05:595:56
1912.05:585:56
2012.05:575:56
2112.05:575:56
2212.05:565:56
2312.05:555:56
2412.05:555:56
2512.05:545:56
2612.05:535:56
2712.15:535:56
2812.15:525:56
2912.15:515:56
3012.15:515:56

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.4 kWh/m².

For context, solar energy here swings from a low near 5.36 kWh/m² to a high of 6.55 kWh/m² in November across the year — September's 6.4 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
16.4Intense
26.4Intense
36.4Intense
46.4Intense
56.4Intense
66.4Intense
76.4Intense
86.4Intense
96.4Intense
106.4Intense
116.4Intense
126.4Intense
136.4Intense
146.4Intense
156.4Intense
166.4Intense
176.4Intense
186.4Intense
196.4Intense
206.4Intense
216.4Intense
226.4Intense
236.4Intense
246.4Intense
256.4Intense
266.4Intense
276.4Intense
286.5Intense
296.5Intense
306.5Intense
Planning a trip in September

Hazard calendar for Junín

In seasonPeak

In September, Junín sits inside its rainy season season. The full year is below, with each hazard's peak months called out.

Junín's rainy season runs September–April, 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 Junín?

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

1.4
Sightseeing
7th-best month of the year
Beach & pool
never really warm enough

September is a weaker month for outdoor sightseeing in Junín.

What to pack for Junín in September

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

In September, Junín sees daytime highs around 10°C and nights near -1°C. Pack a warm layer, rain gear and sun protection. About 24 days see rain.

a warm layerrain gearsun protection

UV index in Junín in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 15 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Junín peaks around February 13 at about 19 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 23 at about 11 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeFeb 13UV 19Jun 23UV 11
UV index (midday)Level
Jan19Extreme
Feb20Extreme
Mar18Extreme
Apr16Extreme
May14Extreme
Jun11Extreme
Jul11Extreme
Aug14Extreme
Sep15Extreme
Oct18Extreme
Nov17Extreme
Dec18Extreme
Location & terrain

Where is Junín?

Junín sits at 11.2°S, 76.0°W, 4,117 m above sea level, in Peru. The nearest listed city is La Oroya, 41 km away.

ChosicaSanta Rosa

Topography around Junín

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

Within 3 km, the terrain around Junín has only modest variations in elevation — a maximum elevation change of 208 m around an average of 4,126 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 759 m; within 80 km, extreme variations in elevation — a maximum elevation change of 4,917 m.

The land around Junín is covered by grassland (47%) and wetland (39%) within 3 km, grassland (77%) within 16 km, and grassland (74%) within 80 km.

3 km
208 m
16 km
759 m
80 km
4,917 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwaterwetland
September weather nearby: La Oroya 41 km · Tarma 44 km · Cerro de Pasco 62 km · Yanacancha 62 km · Jauja 87 km · Chaupimarca 98 km · Chosica 117 km · Santa Rosa 124 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
Catholic 76%Evangelical Christian 16%no religion 5%other religions 3%

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 Junín (-11.159°, -75.993°, elevation 4,117 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).