Zarumilla weather in September

In September, Zarumilla sees average daytime highs of 28°C and overnight lows near 21°C, with 6 mm of rain across 1.2 wet days and about 12 hours of daylight. It is the 10th-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 13% of the time in September, and the air most often feels muggy.

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 Zarumilla's 4th-clearest and 3rd-windiest month. For the whole year in context, see Zarumilla's year-round climate.

Daytime high
28°
10th warmest
Overnight low
21°
2nd coldest
Rainfall
6 mm
1.2 wet days
Daylight
12 hours
6:16 AM – 6:15 PM
Cloud cover
69%
4th clearest
Wind
7 km/h
3rd windiest
Solar energy
5.52 kWh/m²
Travel score
7.0
out of 10

Zarumilla is capital city of Zarumilla, Tumbes, Peru.

Founded
1871

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 Zarumilla reaches about 28°C in the afternoon and slips back to 21°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 30°C. Set against its neighbours, September runs on par with August and on par with October.

15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
12821
22821
32821
42821
52821
62821
72821
82821
92821
102821
112821
122821
132821
142821
152821
162821
172821
182821
192821
202821
212821
222821
232821
242821
252821
262821
272821
282821
292821
302821

How September really feels in Zarumilla

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

September sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Zarumilla weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 24°8413.412.24.2
Feb30° / 24°17718.312.13.5
Mar30° / 24°20417.5123.7
Apr30° / 24°11512.911.94.2
May30° / 23°487.111.85.1
Jun29° / 22°102.211.86.3
Jul28° / 21°41.111.87.3
Aug28° / 21°10.211.97.7
Sep28° / 21°61.2127.0
Oct29° / 21°8212.16.3
Nov29° / 22°163.512.25.9
Dec30° / 23°376.212.25.1

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 13% 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 66%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14258
24159
34159
44159
54159
63961
73961
83961
93862
103763
113763
123664
133565
143466
153367
163367
173268
183169
193169
203169
213070
223070
232971
242971
252971
262971
272971
282872
292872
302773

Chance of precipitation in September

Any precipitation

Zarumilla gets around 6 mm of rain over 1.2 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 4% and peaks near 6% on the wettest days.

0%10%20%30%151015202530
Rain chance (%)
12
22
32
43
53
63
73
83
93
103
113
123
133
143
153
164
174
184
194
204
215
225
235
245
256
266
276
286
296
306

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the muggy band about 85% of days. Sticky, muggy-or-worse air turns up on roughly 88% of them.

0%25%50%75%100%151015202530
Humid (%)Muggy (%)Oppressive (%)
115823
215823
314833
414833
514833
614833
713843
813843
913843
1013843
1113843
1213843
1313843
1413843
1513843
1612853
1712853
1812853
1912853
2011863
2111863
2210873
2310873
249883
259883
268884
278884
288884
297894
307894

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.

0246810151015202530
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm

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 6:23 AM to 6:10 AM, and sunset from 6:19 PM to 6:11 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.96:236:19
211.96:226:19
311.96:226:18
411.96:226:18
511.96:216:18
611.96:216:18
712.06:206:17
812.06:206:17
912.06:196:17
1012.06:196:16
1112.06:186:16
1212.06:186:16
1312.06:176:16
1412.06:176:15
1512.06:166:15
1612.06:166:15
1712.06:166:15
1812.06:156:14
1912.06:156:14
2012.06:146:14
2112.06:146:13
2212.06:136:13
2312.06:136:13
2412.06:126:13
2512.06:126:12
2612.06:116:12
2712.06:116:12
2812.06:106:12
2912.06:106:11
3012.06:106:11

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.52 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 4.52 kWh/m² to a high of 5.52 kWh/m² in September across the year — September's 5.52 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
15.5Bright
25.5Bright
35.5Bright
45.5Bright
55.5Bright
65.5Bright
75.5Bright
85.5Bright
95.5Bright
105.5Bright
115.5Bright
125.5Bright
135.5Bright
145.5Bright
155.5Bright
165.5Bright
175.5Bright
185.5Bright
195.5Bright
205.5Bright
215.5Bright
225.5Bright
235.5Bright
245.5Bright
255.5Bright
265.5Bright
275.5Bright
285.5Bright
295.5Bright
305.5Bright
Planning a trip in September

Hazard calendar for Zarumilla

In seasonPeak

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

Zarumilla's monsoon runs February–April, 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 Zarumilla?

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

7.0
Sightseeing
3rd-best month of the year
7.9
Beach & pool
3rd-best month of the year

September is one of the better times to visit Zarumilla for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Zarumilla in September

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

In September, Zarumilla sees daytime highs around 28°C and nights near 21°C. Pack light clothes. Worth having: sun protection.

light clothessun protection

Sea temperature near Zarumilla in September

The nearest coast averages about 23°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 18 km away) is warmest in March at about 27°C and coldest in September near 23°C.

The water stays above 20°C all year — warm enough for a swim any month.

22°24°26°28°JanFebMarAprMayJunJulAugSepOctNovDecrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan26Warm
Feb26Warm
Mar27Warm
Apr26Warm
May26Warm
Jun25Warm
Jul24Refreshing
Aug23Refreshing
Sep23Refreshing
Oct23Refreshing
Nov24Refreshing
Dec25Warm

UV index in Zarumilla in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 12 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Zarumilla peaks around February 19 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 11 at about 10 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeFeb 19UV 15Jul 11UV 10
UV index (midday)Level
Jan14Extreme
Feb15Extreme
Mar15Extreme
Apr12Extreme
May12Extreme
Jun10Very high
Jul10Very high
Aug11Extreme
Sep12Extreme
Oct13Extreme
Nov12Extreme
Dec12Extreme

Air quality in Zarumilla 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 Zarumilla is worst in December — around 29 µg/m³ PM2.5 (moderate), about 3.1× the cleanest month (August, 9 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateDec 1128 µg/m³Aug 219 µg/m³
PM2.5 (µg/m³)Level
Jan15Moderate
Feb14Moderate
Mar14Moderate
Apr15Moderate
May15Moderate
Jun15Moderate
Jul12Moderate
Aug9Good
Sep10Good
Oct14Moderate
Nov27Moderate
Dec29Moderate
Location & terrain

Where is Zarumilla?

Zarumilla sits at 3.5°S, 80.3°W, 14 m above sea level, in Peru. The nearest listed city is Huaquillas, 6.0 km away.

Topography around Zarumilla

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

Within 3 km, the terrain around Zarumilla has only modest variations in elevation — a maximum elevation change of 29 m around an average of 11 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 116 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,804 m.

The land around Zarumilla is covered by grassland (49%) and artificial surfaces (21%) within 3 km, water (28%) and shrubs (27%) within 16 km, and water (38%) and trees (35%) within 80 km.

3 km
29 m
16 km
116 m
80 km
3,804 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwatermangroves
September weather nearby: Huaquillas 6.0 km · Tumbes 20 km · Arenillas 24 km · Santa Rosa 35 km · Machala 44 km · Pasaje 55 km · Guabo 57 km · Piñas 69 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 Zarumilla (-3.5031°, -80.2731°, elevation 14 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. 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).