Mollendo weather in September

In September, Mollendo sees average daytime highs of 18°C and overnight lows near 13°C, with 9 mm of rain across 2.7 wet days and about 11.9 hours of daylight. It is the 10th-warmest and 9th-wettest month of the year here.

Day-to-day highs hold fairly steady near 18°C through the month. The sky is clear or mostly clear about 12% of the time in September, and the air most often feels comfortable.

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 Mollendo's 1st-clearest and 2nd-windiest month. For the whole year in context, see Mollendo's year-round climate.

Daytime high: 18°; 10th warmest
Overnight low: 13°; 3rd coldest
Rainfall: 9 mm; 2.7 wet days
Daylight: 11 h 54 min; 5:45 AM – 5:40 PM
Cloud cover: 81%; 1st clearest
Wind: 11 km/h; 2nd windiest
Solar energy: 5.45 kWh/m²
Travel score: 6.5; out of 10

Mollendo is city of Peru.

Founded: 1871

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

← August Mollendo 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 18°C through the month.

A typical September day in Mollendo reaches about 18°C in the afternoon and slips back to 13°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 16°C and 20°C. Set against its neighbours, September runs about 1°C warmer than August and about 1°C cooler than 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)	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	18	19	19	19	19	19	19	19	19	19	19
Avg low (°C)	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	14	14	14	14	14	14	14	14

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

Mollendo weather by month

How September compares with the rest of the year at a glance. September is the 10th-warmest and 9th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	24° / 19°	22	7.5	12.9	6.7
Feb	24° / 19°	20	6.7	12.6	6.7
Mar	24° / 19°	12	3.9	12.1	7.2
Apr	22° / 17°	8	2.3	11.6	7.3
May	21° / 15°	11	3.3	11.2	6.8
Jun	18° / 14°	19	6.9	11	5.8
Jul	17° / 13°	21	7.6	11.1	5.3
Aug	17° / 13°	14	4.9	11.4	5.7
Sep	18° / 13°	9	2.7	11.9	6.5
Oct	20° / 14°	7	1.2	12.4	6.9
Nov	21° / 16°	8	1.9	12.8	7.0
Dec	22° / 17°	14	4.4	13	6.8

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 12% of the time in September, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 9% of September, with mostly cloudy or overcast conditions the remaining 80%.

	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 (%)	22	22	21	21	21	20	20	20	19	18	18	18	17	17	17	18	18	18	19	20	20	21	21	22	22	22	24	24	24	24
Cloudier (%)	78	78	79	79	79	80	80	80	81	82	82	82	83	83	83	82	82	82	81	80	80	79	79	78	78	78	76	76	76	76

	Clearer (%)	Cloudier (%)
1	22	78
2	22	78
3	21	79
4	21	79
5	21	79
6	20	80
7	20	80
8	20	80
9	19	81
10	18	82
11	18	82
12	18	82
13	17	83
14	17	83
15	17	83
16	18	82
17	18	82
18	18	82
19	19	81
20	20	80
21	20	80
22	21	79
23	21	79
24	22	78
25	22	78
26	22	78
27	24	76
28	24	76
29	24	76
30	24	76

Chance of precipitation in September

Any precipitation

Mollendo gets around 9 mm of rain over 2.7 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 8% and peaks near 11% on the wettest days.

	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 (%)	10	9	9	10	10	10	11	11	11	11	11	11	11	11	10	10	10	9	9	8	7	7	6	6	5	5	4	4	4	4

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

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the comfortable band about 58% 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 (%)	45	44	44	43	43	42	42	42	42	42	42	42	42	42	42	42	42	41	41	41	40	39	39	38	37	36	36	35	34	33
Comfortable (%)	55	56	56	57	57	58	58	58	57	57	57	57	57	56	56	56	56	57	56	56	57	58	58	59	60	61	61	62	64	65
Humid (%)	0	0	0	0	0	0	0	0	1	1	1	1	1	2	2	2	2	2	3	3	3	3	3	3	3	3	3	3	2	2

	Dry (%)	Comfortable (%)	Humid (%)
1	45	55	0
2	44	56	0
3	44	56	0
4	43	57	0
5	43	57	0
6	42	58	0
7	42	58	0
8	42	58	0
9	42	57	1
10	42	57	1
11	42	57	1
12	42	57	1
13	42	57	1
14	42	56	2
15	42	56	2
16	42	56	2
17	42	56	2
18	41	57	2
19	41	56	3
20	41	56	3
21	40	57	3
22	39	58	3
23	39	58	3
24	38	59	3
25	37	60	3
26	36	61	3
27	36	61	3
28	35	62	3
29	34	64	2
30	33	65	2

Wind in September

Winds average 11 km/h in September.

Across September, daily wind ranges from about 10 km/h on the calmest days to 11 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)	10	10	10	10	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11	11
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	10	calm
2	10	calm
3	10	calm
4	10	calm
5	11	calm
6	11	calm
7	11	calm
8	11	calm
9	11	calm
10	11	calm
11	11	calm
12	11	calm
13	11	calm
14	11	calm
15	11	calm
16	11	calm
17	11	calm
18	11	calm
19	11	calm
20	11	calm
21	11	calm
22	11	calm
23	11	calm
24	11	calm
25	11	calm
26	11	calm
27	11	calm
28	11	calm
29	11	calm
30	11	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 5:58 AM to 5:33 AM, and sunset from 5:38 PM to 5:41 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	11.7	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)	5:58	5:57	5:56	5:55	5:55	5:54	5:53	5:52	5:51	5:50	5:50	5:49	5:48	5:47	5:46	5:45	5:44	5:43	5:43	5:42	5:41	5:40	5:39	5:38	5:37	5:37	5:36	5:35	5:34	5:33
Sunset (PM)	5:38	5:38	5:38	5:38	5:38	5:38	5:38	5:39	5:39	5:39	5:39	5:39	5:39	5:39	5:39	5:40	5:40	5:40	5:40	5:40	5:40	5:40	5:40	5:41	5:41	5:41	5:41	5:41	5:41	5:41

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	11.7	5:58	5:38
2	11.7	5:57	5:38
3	11.7	5:56	5:38
4	11.7	5:55	5:38
5	11.7	5:55	5:38
6	11.7	5:54	5:38
7	11.8	5:53	5:38
8	11.8	5:52	5:39
9	11.8	5:51	5:39
10	11.8	5:50	5:39
11	11.8	5:50	5:39
12	11.8	5:49	5:39
13	11.9	5:48	5:39
14	11.9	5:47	5:39
15	11.9	5:46	5:39
16	11.9	5:45	5:40
17	11.9	5:44	5:40
18	11.9	5:43	5:40
19	12.0	5:43	5:40
20	12.0	5:42	5:40
21	12.0	5:41	5:40
22	12.0	5:40	5:40
23	12.0	5:39	5:40
24	12.0	5:38	5:41
25	12.1	5:37	5:41
26	12.1	5:37	5:41
27	12.1	5:36	5:41
28	12.1	5:35	5:41
29	12.1	5:34	5:41
30	12.1	5:33	5:41

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.45 kWh/m².

For context, solar energy here swings from a low near 3.83 kWh/m² to a high of 6.77 kWh/m² in December across the year — September's 5.45 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)	5.1	5.1	5.1	5.2	5.2	5.2	5.2	5.3	5.3	5.3	5.3	5.4	5.4	5.4	5.4	5.5	5.5	5.5	5.6	5.6	5.6	5.6	5.7	5.7	5.7	5.7	5.8	5.8	5.8	5.8
Level	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright

	Solar energy (kWh/m²)	Level
1	5.1	Bright
2	5.1	Bright
3	5.1	Bright
4	5.2	Bright
5	5.2	Bright
6	5.2	Bright
7	5.2	Bright
8	5.3	Bright
9	5.3	Bright
10	5.3	Bright
11	5.3	Bright
12	5.4	Bright
13	5.4	Bright
14	5.4	Bright
15	5.4	Bright
16	5.5	Bright
17	5.5	Bright
18	5.5	Bright
19	5.6	Bright
20	5.6	Bright
21	5.6	Bright
22	5.6	Bright
23	5.7	Bright
24	5.7	Bright
25	5.7	Bright
26	5.7	Bright
27	5.8	Bright
28	5.8	Bright
29	5.8	Bright
30	5.8	Bright

Planning a trip in September

Is September a good time to visit Mollendo?

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

6.5

Sightseeing

9th-best month of the year

2.4

Beach & pool

9th-best month of the year

September is a reasonable time to visit Mollendo for sightseeing.

What to pack for Mollendo in September

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

In September, Mollendo sees daytime highs around 18°C and nights near 13°C. Worth packing: sun protection.

sun protection

Sea temperature near Mollendo in September

The nearest coast averages about 17°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 16 km away) is warmest in February at about 23°C and coldest in August near 17°C.

It's comfortable for a long swim from Nov 29 to May 6 — about 5.2 months when the water holds above 20°C.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Sea temperature (°C)	22	23	22	21	20	19	18	17	17	18	20	21
Comfort	Refreshing	Refreshing	Refreshing	Refreshing	Cool	Cool	Cool	Cool	Cool	Cool	Cool	Refreshing

	Sea temperature (°C)	Comfort
Jan	22	Refreshing
Feb	23	Refreshing
Mar	22	Refreshing
Apr	21	Refreshing
May	20	Cool
Jun	19	Cool
Jul	18	Cool
Aug	17	Cool
Sep	17	Cool
Oct	18	Cool
Nov	20	Cool
Dec	21	Refreshing

UV index in Mollendo in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Mollendo peaks around February 9 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 10 at about 7 (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)	15	15	12	11	9	7	7	9	11	13	13	14
Level	Extreme	Extreme	Extreme	Extreme	Very high	Very high	High	Very high	Extreme	Extreme	Extreme	Extreme

	UV index (midday)	Level
Jan	15	Extreme
Feb	15	Extreme
Mar	12	Extreme
Apr	11	Extreme
May	9	Very high
Jun	7	Very high
Jul	7	High
Aug	9	Very high
Sep	11	Extreme
Oct	13	Extreme
Nov	13	Extreme
Dec	14	Extreme

Location & terrain

Where is Mollendo?

Mollendo sits at 17.0°S, 72.0°W, 70 m above sea level, in Peru. The nearest listed city is El Pedregal, 76 km away.

Topography around Mollendo

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

Within 3 km, the terrain around Mollendo has significant variations in elevation — a maximum elevation change of 407 m around an average of 82 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,294 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,397 m.

The land around Mollendo is covered by bare terrain (45%) and water (36%) within 3 km, water (44%) and bare terrain (43%) within 16 km, and bare terrain (59%) and water (36%) within 80 km.

3 km

407 m

bare terrain 45%

16 km

1,294 m

water 44%

80 km

3,397 m

bare terrain 59%

treesshrubsgrasslandcroplandartificial surfacesbare terrainwater

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

September weather nearby: El Pedregal 76 km · Jacobo Hunter 81 km · Ciudad Satelite 84 km · Arequipa 86 km · Camaná 86 km · Selva Alegre 89 km · Cono Norte 90 km · Ilo 98 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 Mollendo (-17.0231°, -72.0147°, elevation 70 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. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. 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	18	13
2	18	13
3	18	13
4	18	13
5	18	13
6	18	13
7	18	13
8	18	13
9	18	13
10	18	13
11	18	13
12	18	13
13	18	13
14	18	13
15	18	13
16	18	13
17	18	13
18	18	13
19	18	13
20	18	13
21	19	13
22	19	13
23	19	14
24	19	14
25	19	14
26	19	14
27	19	14
28	19	14
29	19	14
30	19	14

	Clearer (%)	Cloudier (%)
1	22	78
2	22	78
3	21	79
4	21	79
5	21	79
6	20	80
7	20	80
8	20	80
9	19	81
10	18	82
11	18	82
12	18	82
13	17	83
14	17	83
15	17	83
16	18	82
17	18	82
18	18	82
19	19	81
20	20	80
21	20	80
22	21	79
23	21	79
24	22	78
25	22	78
26	22	78
27	24	76
28	24	76
29	24	76
30	24	76

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

	Dry (%)	Comfortable (%)	Humid (%)
1	45	55	0
2	44	56	0
3	44	56	0
4	43	57	0
5	43	57	0
6	42	58	0
7	42	58	0
8	42	58	0
9	42	57	1
10	42	57	1
11	42	57	1
12	42	57	1
13	42	57	1
14	42	56	2
15	42	56	2
16	42	56	2
17	42	56	2
18	41	57	2
19	41	56	3
20	41	56	3
21	40	57	3
22	39	58	3
23	39	58	3
24	38	59	3
25	37	60	3
26	36	61	3
27	36	61	3
28	35	62	3
29	34	64	2
30	33	65	2

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

	Clearer (%)	Cloudier (%)
1	22	78
2	22	78
3	21	79
4	21	79
5	21	79
6	20	80
7	20	80
8	20	80
9	19	81
10	18	82
11	18	82
12	18	82
13	17	83
14	17	83
15	17	83
16	18	82
17	18	82
18	18	82
19	19	81
20	20	80
21	20	80
22	21	79
23	21	79
24	22	78
25	22	78
26	22	78
27	24	76
28	24	76
29	24	76
30	24	76

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

	Dry (%)	Comfortable (%)	Humid (%)
1	45	55	0
2	44	56	0
3	44	56	0
4	43	57	0
5	43	57	0
6	42	58	0
7	42	58	0
8	42	58	0
9	42	57	1
10	42	57	1
11	42	57	1
12	42	57	1
13	42	57	1
14	42	56	2
15	42	56	2
16	42	56	2
17	42	56	2
18	41	57	2
19	41	56	3
20	41	56	3
21	40	57	3
22	39	58	3
23	39	58	3
24	38	59	3
25	37	60	3
26	36	61	3
27	36	61	3
28	35	62	3
29	34	64	2
30	33	65	2

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

	Clearer (%)	Cloudier (%)
1	22	78
2	22	78
3	21	79
4	21	79
5	21	79
6	20	80
7	20	80
8	20	80
9	19	81
10	18	82
11	18	82
12	18	82
13	17	83
14	17	83
15	17	83
16	18	82
17	18	82
18	18	82
19	19	81
20	20	80
21	20	80
22	21	79
23	21	79
24	22	78
25	22	78
26	22	78
27	24	76
28	24	76
29	24	76
30	24	76

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

	Dry (%)	Comfortable (%)	Humid (%)
1	45	55	0
2	44	56	0
3	44	56	0
4	43	57	0
5	43	57	0
6	42	58	0
7	42	58	0
8	42	58	0
9	42	57	1
10	42	57	1
11	42	57	1
12	42	57	1
13	42	57	1
14	42	56	2
15	42	56	2
16	42	56	2
17	42	56	2
18	41	57	2
19	41	56	3
20	41	56	3
21	40	57	3
22	39	58	3
23	39	58	3
24	38	59	3
25	37	60	3
26	36	61	3
27	36	61	3
28	35	62	3
29	34	64	2
30	33	65	2