Canelones weather in September

In September, Canelones sees average daytime highs of 18°C and overnight lows near 9°C, with 84 mm of rain across 7.9 wet days and about 11.8 hours of daylight. It is the 9th-warmest and 8th-wettest month of the year here.

Highs climb over the month, from about 18°C in the first days to 19°C by the end. The sky is clear or mostly clear about 32% of the time in September, and the air most often feels dry.

Daylight stretches from about 11 h 12 min at the start of September to 12 h 18 min by month's end. Set against the rest of the year, September is Canelones's 8th-clearest and 1st-windiest month. For the whole year in context, see Canelones's year-round climate.

Daytime high
18°
9th warmest
Overnight low
4th coldest
Rainfall
84 mm
7.9 wet days
Daylight
11 h 48 min
7:46 AM – 7:33 PM
Cloud cover
58%
8th clearest
Wind
14 km/h
1st windiest
Solar energy
4.33 kWh/m²
Travel score
6.3
out of 10

Canelones is city in Uruguay.

Density
2,089/km²
people per km²
Founded
1782

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 18°C in the first days to 19°C by the end.

A typical September day in Canelones reaches about 18°C in the afternoon and slips back to 9°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 13°C and 24°C. Set against its neighbours, September runs about 1°C warmer than August and about 3°C cooler than October.

10°15°20°25°151015202530
Avg high (°C)Avg low (°C)
1189
2189
3189
4189
5189
6189
7189
8189
9189
10189
11189
12189
13189
14189
15189
16189
17199
18199
19199
20199
21199
22199
23199
24199
251910
261910
271910
281910
291910
302010

Canelones 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 daysDaylight (hours)Travel score
Jan29° / 18°797.5146.1
Feb28° / 18°1018.313.36.5
Mar26° / 16°988.412.37.1
Apr22° / 13°1018.111.27.1
May19° / 10°836.910.26.4
Jun16° / 817.49.75.1
Jul15° / 817.49.94.8
Aug17° / 917.710.75.8
Sep18° / 847.911.86.3
Oct21° / 12°1159.712.96.6
Nov24° / 14°998.113.87.3
Dec27° / 16°858.114.36.8

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 32% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 14% of September, with mostly cloudy or overcast conditions the remaining 54%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14357
24357
34357
44357
54456
64555
74555
84555
94654
104753
114852
124951
134951
144852
154951
164951
174951
184852
194852
204852
214753
224753
234753
244654
254555
264555
274357
284357
294357
304258

Chance of precipitation in September

Any precipitation

Canelones gets around 84 mm of rain over 7.9 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 26% and peaks near 29% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
129
229
329
428
528
628
728
827
927
1026
1126
1225
1325
1425
1524
1624
1724
1824
1924
2024
2124
2225
2325
2425
2525
2626
2726
2826
2926
3026

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 81% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1811441
2811441
3821341
4821341
5821341
6821341
7811351
8811351
9821251
10821251
11821251
12821251
13821251
14821251
15821251
16821251
17831151
18831151
19821251
20821251
21831241
22821341
23821341
24811441
25801541
26791641
27791641
28781741
29771841
30761941

Wind in September

Winds average 14 km/h in September, the windiest month of the year.

Across September, daily wind ranges from about 14 km/h on the calmest days to 14 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
114light breeze
214light breeze
314light breeze
414light breeze
514light breeze
614light breeze
714light breeze
814light breeze
914light breeze
1014light breeze
1114light breeze
1214light breeze
1314light breeze
1414light breeze
1514light breeze
1614light breeze
1714light breeze
1814light breeze
1914light breeze
2014light breeze
2114light breeze
2214light breeze
2314light breeze
2414light breeze
2514light breeze
2614light breeze
2714light breeze
2814light breeze
2914light breeze
3014light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 12 min at the start of September to 12 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 66 minutes over September. Sunrise moves from 8:08 AM to 7:25 AM, and sunset from 7:22 PM to 7:44 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.28:087:22
211.38:067:23
311.38:057:24
411.38:037:24
511.48:027:25
611.48:007:26
711.57:597:26
811.57:587:27
911.57:567:28
1011.67:557:29
1111.67:537:29
1211.67:527:30
1311.77:507:31
1411.77:497:32
1511.87:477:32
1611.87:467:33
1711.87:447:34
1811.97:437:35
1911.97:417:35
2011.97:407:36
2112.07:387:37
2212.07:377:38
2312.07:357:38
2412.17:347:39
2512.17:337:40
2612.27:317:41
2712.27:307:41
2812.27:287:42
2912.37:277:43
3012.37:257:44

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.33 kWh/m².

For context, solar energy here swings from a low near 2.18 kWh/m² to a high of 7.39 kWh/m² in December across the year — September's 4.33 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
13.6Moderate
23.7Moderate
33.7Moderate
43.8Moderate
53.8Moderate
63.9Moderate
73.9Moderate
84.0Moderate
94.0Bright
104.1Bright
114.1Bright
124.2Bright
134.2Bright
144.3Bright
154.3Bright
164.4Bright
174.4Bright
184.5Bright
194.5Bright
204.5Bright
214.6Bright
224.6Bright
234.7Bright
244.7Bright
254.7Bright
264.7Bright
274.8Bright
284.8Bright
294.8Bright
304.8Bright
Planning a trip in September

Is September a good time to visit Canelones?

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

6.3
Sightseeing
8th-best month of the year
2.4
Beach & pool
9th-best month of the year

September is a reasonable time to visit Canelones for sightseeing.

What to pack for Canelones in September

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

In September, Canelones sees daytime highs around 18°C and nights near 9°C. Little to plan around — just the basics. About 8 days see rain.

Sea temperature near Canelones in September

The nearest coast averages about 14°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 40 km away) is warmest in January at about 24°C and coldest in July near 11°C.

It's comfortable for a long swim from Nov 23 to Apr 9 — about 4.5 months when the water holds above 20°C.

10°15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan24Refreshing
Feb24Refreshing
Mar23Refreshing
Apr19Cool
May16Cool
Jun13Bracing
Jul11Bracing
Aug12Bracing
Sep14Bracing
Oct17Cool
Nov19Cool
Dec22Refreshing

UV index in Canelones in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Canelones peaks around January 16 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 18 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 11 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highModerateHighVery highExtremeJan 16UV 13Jun 18UV 3
UV index (midday)Level
Jan13Extreme
Feb11Extreme
Mar10Very high
Apr6High
May3Moderate
Jun3Moderate
Jul3Moderate
Aug4Moderate
Sep6High
Oct8Very high
Nov11Extreme
Dec11Extreme
Location & terrain

Where is Canelones?

Canelones sits at 34.5°S, 56.3°W, 29 m above sea level, in Uruguay. The nearest listed city is Santa Lucía, 13 km away.

Barros BlancosPandoPaso de Carrasco

Topography around Canelones

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

Within 3 km, the terrain around Canelones has only modest variations in elevation — a maximum elevation change of 37 m around an average of 21 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 74 m; within 80 km, only modest variations in elevation — a maximum elevation change of 184 m.

The land around Canelones is covered by grassland (47%) and trees (23%) within 3 km, grassland (50%) and cropland (32%) within 16 km, and grassland (38%), water (28%) and cropland (25%) within 80 km.

3 km
37 m
16 km
74 m
80 km
184 m
treesgrasslandcroplandartificial surfaceswaterwetland
September weather nearby: Santa Lucía 13 km · Progreso 17 km · Las Piedras 24 km · La Paz 27 km · Delta del Tigre 28 km · Barros Blancos 36 km · Pando 37 km · Paso de Carrasco 43 km

Uruguay travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / F / I / L
230 V · 50 Hz
Prices
≈ 66% of US
price level, 2025
GDP per capita
$25,216
2025
Happiness
6.6 / 10
World Happiness, 2025
Homicide rate
11.2
per 100k, 2023
Road deaths
14.8
per 100k/yr, 2019
Income group
High
World Bank
English
Moderate
EF EPI 542
Religion
none 47%Roman Catholic 37%Protestant 15%atheist 10%

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 Canelones (-34.5238°, -56.2822°, elevation 29 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).