Jaén weather in September

In September, Jaén sees average daytime highs of 28°C and overnight lows near 19°C, with 39 mm of rain across 9.9 wet days and about 12 hours of daylight. It is the 8th-warmest and 10th-wettest month of the year here.

Day-to-day highs hold fairly steady near 28°C through the month. The sky is clear or mostly clear about 22% of the time in September, and the air most often feels humid.

Daylight stretches from about 11 h 54 min at the start of September to 12 hours by month's end. Set against the rest of the year, September is Jaén's 4th-clearest and 5th-windiest month. For the whole year in context, see Jaén's year-round climate.

Daytime high
28°
8th warmest
Overnight low
19°
4th coldest
Rainfall
39 mm
9.9 wet days
Daylight
12 hours
6:10 AM – 6:09 PM
Cloud cover
61%
4th clearest
Wind
3 km/h
5th windiest
Solar energy
5.19 kWh/m²
Travel score
6.1
out of 10

Jaén is capital city of Jaén, Peru.

Density
1/km²
people per km²
Founded
1549

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 28°C through the month.

A typical September day in Jaén reaches about 28°C in the afternoon and slips back to 19°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 25°C and 31°C. Set against its neighbours, September runs about 2°C warmer than August and about 2°C cooler than October.

15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
12719
22719
32719
42719
52719
62719
72719
82719
92819
102819
112819
122819
132819
142819
152819
162819
172819
182819
192819
202819
212819
222819
232819
242819
252819
262919
272919
282919
292920
302920

Jaén weather by month

How September compares with the rest of the year at a glance. September is the 8th-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 21°479.812.34.7
Feb30° / 21°6212.412.24.4
Mar30° / 21°7114.3124.4
Apr29° / 20°8317.111.94.4
May28° / 20°8416.911.75.3
Jun26° / 19°7516.611.75.6
Jul26° / 18°6717.411.75.7
Aug26° / 19°5313.311.86.2
Sep28° / 19°399.9126.1
Oct30° / 20°368.312.15.2
Nov31° / 21°317.612.34.6
Dec30° / 21°4310.112.34.6

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 22% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 27% of September, with mostly cloudy or overcast conditions the remaining 51%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15743
25644
35644
45644
55545
65446
75446
85347
95347
105248
115248
125149
135050
144951
154852
164852
174753
184654
194654
204555
214555
224555
234456
244456
254456
264456
274357
284357
294357
304357

Chance of precipitation in September

Any precipitation

Jaén gets around 39 mm of rain over 9.9 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 33% and peaks near 39% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
139
238
338
437
537
636
735
835
934
1034
1133
1233
1332
1432
1532
1631
1731
1832
1932
2032
2132
2232
2332
2432
2531
2631
2731
2831
2930
3030

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the humid band about 80% of days. Sticky, muggy-or-worse air turns up on roughly 10% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1197911
2197911
3197911
4098110
5098110
6098110
7098110
809829
909829
1009829
1109829
1209829
1309838
1409838
1509838
1609838
17010819
18010819
19010819
20010819
210108010
220117910
230117910
240117811
250127711
260127612
270127612
280127612
290127513
300127513

Wind in September

Winds average 3 km/h in September.

Across September, daily wind ranges from about 3 km/h on the calmest days to 3 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
13calm
23calm
33calm
43calm
53calm
63calm
73calm
83calm
93calm
103calm
113calm
123calm
133calm
143calm
153calm
163calm
173calm
183calm
193calm
203calm
213calm
223calm
233calm
243calm
253calm
263calm
273calm
283calm
293calm
303calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 54 min at the start of September to 12 hours by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 6 minutes over September. Sunrise moves from 6:18 AM to 6:03 AM, and sunset from 6:12 PM to 6:06 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.96:186:12
211.96:186:11
311.96:176:11
411.96:176:11
511.96:166:11
611.96:166:11
711.96:156:11
811.96:156:10
911.96:146:10
1011.96:146:10
1111.96:136:10
1211.96:136:09
1312.06:126:09
1412.06:126:09
1512.06:116:09
1612.06:106:09
1712.06:106:08
1812.06:096:08
1912.06:096:08
2012.06:086:08
2112.06:086:08
2212.06:076:07
2312.06:076:07
2412.06:066:07
2512.06:066:07
2612.06:056:07
2712.06:056:06
2812.06:046:06
2912.06:046:06
3012.06:036:06

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.19 kWh/m².

For context, solar energy here swings from a low near 3.82 kWh/m² to a high of 5.78 kWh/m² in November across the year — September's 5.19 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
14.9Bright
24.9Bright
35.0Bright
45.0Bright
55.0Bright
65.0Bright
75.0Bright
85.1Bright
95.1Bright
105.1Bright
115.1Bright
125.1Bright
135.2Bright
145.2Bright
155.2Bright
165.2Bright
175.2Bright
185.3Bright
195.3Bright
205.3Bright
215.3Bright
225.3Bright
235.3Bright
245.3Bright
255.3Bright
265.4Bright
275.4Bright
285.4Bright
295.4Bright
305.4Bright
Planning a trip in September

Is September a good time to visit Jaén?

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

6.1
Sightseeing
2nd-best month of the year
6.7
Beach & pool
2nd-best month of the year

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

What to pack for Jaén in September

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

In September, Jaén sees daytime highs around 28°C and nights near 19°C. Pack light clothes. Worth having: rain gear and sun protection. About 10 days see rain.

light clothesrain gearsun protection

UV index in Jaén in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Jaén peaks around February 15 at about 17 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 13 at about 11 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeFeb 15UV 17Jul 13UV 11
UV index (midday)Level
Jan16Extreme
Feb17Extreme
Mar16Extreme
Apr13Extreme
May13Extreme
Jun11Extreme
Jul11Extreme
Aug11Extreme
Sep13Extreme
Oct15Extreme
Nov13Extreme
Dec13Extreme

Air quality in Jaén 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 Jaén is worst in November — around 18 µg/m³ PM2.5 (moderate), about 2.3× the cleanest month (July, 8 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateNov 1418 µg/m³Jul 108 µg/m³
PM2.5 (µg/m³)Level
Jan12Good
Feb13Moderate
Mar13Moderate
Apr12Moderate
May10Good
Jun8Good
Jul8Good
Aug12Good
Sep18Moderate
Oct14Moderate
Nov18Moderate
Dec12Good
Location & terrain

Where is Jaén?

Jaén sits at 5.7°S, 78.8°W, 730 m above sea level, in Peru. The nearest listed city is Bagua Grande, 41 km away.

ChachapoyasChongoyapePátapoFerreñafePicsiSaña

Topography around Jaén

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

Within 3 km, the terrain around Jaén has large variations in elevation — a maximum elevation change of 752 m around an average of 860 m above sea level; within 16 km, extreme variations in elevation — a maximum elevation change of 2,515 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,781 m.

The land around Jaén is covered by trees (35%), grassland (34%) and artificial surfaces (21%) within 3 km, trees (54%) and grassland (39%) within 16 km, and trees (60%) and grassland (38%) within 80 km.

3 km
752 m
16 km
2,515 m
80 km
3,781 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Bagua Grande 41 km · La Peca 43 km · Chachapoyas 119 km · Chongoyape 122 km · Pátapo 146 km · Ferreñafe 150 km · Picsi 155 km · Saña 160 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 Jaén (-5.7073°, -78.8079°, elevation 730 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).