Treinta y Tres weather in May

In May, Treinta y Tres sees average daytime highs of 19°C and overnight lows near 10°C, with 97 mm of rain across 7 wet days and about 10.3 hours of daylight. It is the 8th-warmest and 5th-wettest month of the year here.

Highs ease over the month, from about 21°C in the first days to 18°C by the end. The sky is clear or mostly clear about 29% of the time in May, and the air most often feels dry.

Daylight stretches from about 10 h 42 min at the start of May to 10 hours by month's end. Set against the rest of the year, May is Treinta y Tres's 9th-clearest and 12th-windiest month. For the whole year in context, see Treinta y Tres's year-round climate.

Daytime high: 19°; 8th warmest
Overnight low: 10°; 5th coldest
Rainfall: 97 mm; 7 wet days
Daylight: 10 h 18 min; 8:25 AM – 6:42 PM
Cloud cover: 61%; 9th clearest
Wind: 12 km/h; 12th windiest
Solar energy: 2.64 kWh/m²
Travel score: 6.6; out of 10

Treinta y Tres is city of Treinta y Tres Department, Uruguay.

Density: 1,429/km²; people per km²
Founded: 1853

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

← April Treinta y Tres year-round climate June →Best places to visit in May

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 21°C in the first days to 18°C by the end.

A typical May day in Treinta y Tres reaches about 19°C in the afternoon and slips back to 10°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 15°C and 24°C. Set against its neighbours, May runs about 4°C cooler than April and about 3°C warmer than June.

	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	31
Avg high (°C)	21	21	21	21	21	21	21	21	20	20	20	20	20	20	20	20	19	19	19	19	19	19	19	18	18	18	18	18	18	18	18
Avg low (°C)	12	12	12	11	11	11	11	11	11	11	11	11	11	11	11	11	10	10	10	10	10	10	10	10	10	10	9	9	9	9	9

	Avg high (°C)	Avg low (°C)
1	21	12
2	21	12
3	21	12
4	21	11
5	21	11
6	21	11
7	21	11
8	21	11
9	20	11
10	20	11
11	20	11
12	20	11
13	20	11
14	20	11
15	20	11
16	20	11
17	19	10
18	19	10
19	19	10
20	19	10
21	19	10
22	19	10
23	19	10
24	18	10
25	18	10
26	18	10
27	18	9
28	18	9
29	18	9
30	18	9
31	18	9

Treinta y Tres weather by month

How May compares with the rest of the year at a glance. May is the 8th-warmest and 5th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	29° / 18°	83	8.5	13.9	5.8
Feb	28° / 18°	94	8.9	13.2	6.1
Mar	27° / 16°	82	8.7	12.3	6.8
Apr	23° / 14°	108	8.7	11.2	7.0
May	19° / 10°	97	7	10.3	6.6
Jun	17° / 8°	91	8.1	9.8	5.5
Jul	16° / 7°	89	8	10	5.3
Aug	18° / 8°	103	8.2	10.8	6.1
Sep	19° / 9°	99	8.6	11.8	6.3
Oct	22° / 12°	112	10	12.8	6.6
Nov	25° / 14°	92	8.1	13.7	7.2
Dec	28° / 16°	87	8.4	14.2	6.6

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 29% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 16% of May, with mostly cloudy or overcast conditions the remaining 55%. Skies tend to cloud over as the month goes on.

	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	31
Clearer (%)	49	49	49	49	49	49	49	49	49	48	48	47	47	46	46	44	44	44	43	42	42	42	42	42	42	42	42	41	42	42	43
Cloudier (%)	51	51	51	51	51	51	51	51	51	52	52	53	53	54	54	56	56	56	57	58	58	58	58	58	58	58	58	59	58	58	57

	Clearer (%)	Cloudier (%)
1	49	51
2	49	51
3	49	51
4	49	51
5	49	51
6	49	51
7	49	51
8	49	51
9	49	51
10	48	52
11	48	52
12	47	53
13	47	53
14	46	54
15	46	54
16	44	56
17	44	56
18	44	56
19	43	57
20	42	58
21	42	58
22	42	58
23	42	58
24	42	58
25	42	58
26	42	58
27	42	58
28	41	59
29	42	58
30	42	58
31	43	57

Chance of precipitation in May

Any precipitation

Treinta y Tres gets around 97 mm of rain over 7 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 23% and peaks near 25% 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	31
Rain chance (%)	25	25	24	24	23	23	22	22	21	21	21	21	21	21	21	21	22	22	22	22	23	23	23	23	24	24	24	24	24	24	24

	Rain chance (%)
1	25
2	25
3	24
4	24
5	23
6	23
7	22
8	22
9	21
10	21
11	21
12	21
13	21
14	21
15	21
16	21
17	22
18	22
19	22
20	22
21	23
22	23
23	23
24	23
25	24
26	24
27	24
28	24
29	24
30	24
31	24

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the dry band about 65% 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	31
Dry (%)	56	59	59	60	60	61	62	62	64	63	63	63	63	63	63	63	64	65	65	65	67	66	67	69	69	71	72	74	74	76	77
Comfortable (%)	22	21	21	21	21	21	21	21	21	22	22	22	22	22	22	22	22	21	21	21	20	20	19	18	18	17	16	15	15	14	14
Humid (%)	17	16	16	15	15	15	14	14	13	13	13	13	13	13	13	13	13	13	13	13	12	12	12	11	11	10	10	9	9	8	7
Muggy (%)	5	4	4	4	4	3	3	3	2	2	2	2	2	2	2	2	1	1	1	1	1	2	2	2	2	2	2	2	2	2	2

	Dry (%)	Comfortable (%)	Humid (%)	Muggy (%)
1	56	22	17	5
2	59	21	16	4
3	59	21	16	4
4	60	21	15	4
5	60	21	15	4
6	61	21	15	3
7	62	21	14	3
8	62	21	14	3
9	64	21	13	2
10	63	22	13	2
11	63	22	13	2
12	63	22	13	2
13	63	22	13	2
14	63	22	13	2
15	63	22	13	2
16	63	22	13	2
17	64	22	13	1
18	65	21	13	1
19	65	21	13	1
20	65	21	13	1
21	67	20	12	1
22	66	20	12	2
23	67	19	12	2
24	69	18	11	2
25	69	18	11	2
26	71	17	10	2
27	72	16	10	2
28	74	15	9	2
29	74	15	9	2
30	76	14	8	2
31	77	14	7	2

Wind in May

Winds average 12 km/h in May, the calmest month.

Across May, daily wind ranges from about 12 km/h on the calmest days to 12 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	31
Wind speed (km/h)	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12
Feels	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze

	Wind speed (km/h)	Feels
1	12	calm
2	12	calm
3	12	calm
4	12	calm
5	12	calm
6	12	calm
7	12	calm
8	12	calm
9	12	calm
10	12	calm
11	12	calm
12	12	calm
13	12	calm
14	12	calm
15	12	calm
16	12	calm
17	12	calm
18	12	calm
19	12	calm
20	12	calm
21	12	calm
22	12	calm
23	12	calm
24	12	light breeze
25	12	light breeze
26	12	light breeze
27	12	light breeze
28	12	light breeze
29	12	light breeze
30	12	light breeze
31	12	light breeze

Sunrise & sunset in May

DaylightNight

Daylight runs from about 10 h 42 min at the start of May to 10 hours by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 42 minutes over May. Sunrise moves from 8:14 AM to 8:35 AM, and sunset from 6:56 PM to 6:34 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	31
Daylight (h)	10.7	10.7	10.6	10.6	10.6	10.6	10.5	10.5	10.5	10.4	10.4	10.4	10.4	10.3	10.3	10.3	10.3	10.2	10.2	10.2	10.2	10.2	10.1	10.1	10.1	10.1	10.1	10.0	10.0	10.0	10.0
Sunrise (AM)	8:14	8:15	8:15	8:16	8:17	8:18	8:18	8:19	8:20	8:21	8:21	8:22	8:23	8:24	8:24	8:25	8:26	8:27	8:27	8:28	8:29	8:29	8:30	8:31	8:32	8:32	8:33	8:33	8:34	8:35	8:35
Sunset (PM)	6:56	6:55	6:54	6:53	6:52	6:51	6:50	6:49	6:48	6:47	6:46	6:46	6:45	6:44	6:43	6:42	6:42	6:41	6:40	6:40	6:39	6:39	6:38	6:38	6:37	6:37	6:36	6:36	6:35	6:35	6:34

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	10.7	8:14	6:56
2	10.7	8:15	6:55
3	10.6	8:15	6:54
4	10.6	8:16	6:53
5	10.6	8:17	6:52
6	10.6	8:18	6:51
7	10.5	8:18	6:50
8	10.5	8:19	6:49
9	10.5	8:20	6:48
10	10.4	8:21	6:47
11	10.4	8:21	6:46
12	10.4	8:22	6:46
13	10.4	8:23	6:45
14	10.3	8:24	6:44
15	10.3	8:24	6:43
16	10.3	8:25	6:42
17	10.3	8:26	6:42
18	10.2	8:27	6:41
19	10.2	8:27	6:40
20	10.2	8:28	6:40
21	10.2	8:29	6:39
22	10.2	8:29	6:39
23	10.1	8:30	6:38
24	10.1	8:31	6:38
25	10.1	8:32	6:37
26	10.1	8:32	6:37
27	10.1	8:33	6:36
28	10.0	8:33	6:36
29	10.0	8:34	6:35
30	10.0	8:35	6:35
31	10.0	8:35	6:34

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 2.64 kWh/m².

For context, solar energy here swings from a low near 2.21 kWh/m² to a high of 7 kWh/m² in December across the year — May's 2.64 kWh/m² sits near the bottom.

	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	31
Solar energy (kWh/m²)	3.1	3.1	3.0	3.0	3.0	3.0	2.9	2.9	2.9	2.8	2.8	2.7	2.7	2.7	2.6	2.6	2.6	2.5	2.5	2.5	2.5	2.5	2.4	2.4	2.4	2.4	2.4	2.4	2.4	2.3	2.3
Level	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate

	Solar energy (kWh/m²)	Level
1	3.1	Moderate
2	3.1	Moderate
3	3.0	Moderate
4	3.0	Moderate
5	3.0	Moderate
6	3.0	Moderate
7	2.9	Moderate
8	2.9	Moderate
9	2.9	Moderate
10	2.8	Moderate
11	2.8	Moderate
12	2.7	Moderate
13	2.7	Moderate
14	2.7	Moderate
15	2.6	Moderate
16	2.6	Moderate
17	2.6	Moderate
18	2.5	Moderate
19	2.5	Moderate
20	2.5	Moderate
21	2.5	Moderate
22	2.5	Moderate
23	2.4	Moderate
24	2.4	Moderate
25	2.4	Moderate
26	2.4	Moderate
27	2.4	Moderate
28	2.4	Moderate
29	2.4	Moderate
30	2.3	Moderate
31	2.3	Moderate

Planning a trip in May

Is May a good time to visit Treinta y Tres?

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

6.6

Sightseeing

4th-best month of the year

3.1

Beach & pool

8th-best month of the year

May is a reasonable time to visit Treinta y Tres for sightseeing.

What to pack for Treinta y Tres in May

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

In May, Treinta y Tres sees daytime highs around 19°C and nights near 10°C. Little to plan around — just the basics. About 7 days see rain.

UV index in Treinta y Tres in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 4 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Treinta y Tres peaks around January 15 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.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	13	12	10	6	4	3	3	4	6	8	11	12
Level	Extreme	Extreme	Very high	High	Moderate	Moderate	Moderate	Moderate	High	Very high	Extreme	Extreme

	UV index (midday)	Level
Jan	13	Extreme
Feb	12	Extreme
Mar	10	Very high
Apr	6	High
May	4	Moderate
Jun	3	Moderate
Jul	3	Moderate
Aug	4	Moderate
Sep	6	High
Oct	8	Very high
Nov	11	Extreme
Dec	12	Extreme

Location & terrain

Where is Treinta y Tres?

Treinta y Tres sits at 33.2°S, 54.4°W, 55 m above sea level, in Uruguay. The nearest listed city is Melo, 98 km away.

Topography around Treinta y Tres

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

Within 3 km, the terrain around Treinta y Tres has only modest variations in elevation — a maximum elevation change of 44 m around an average of 40 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 144 m; within 80 km, significant variations in elevation — a maximum elevation change of 375 m.

The land around Treinta y Tres is covered by grassland (38%), trees (35%) and artificial surfaces (24%) within 3 km, grassland (72%) within 16 km, and grassland (69%) within 80 km.

3 km

44 m

grassland 38%

16 km

144 m

grassland 72%

80 km

375 m

grassland 69%

treesgrasslandcroplandartificial surfaceswaterwetland

← April Treinta y Tres year-round climate June →Best places to visit in May

May weather nearby: Melo 98 km · Santa Vitória do Palmar 100 km · Jaguarão 120 km · Rocha 139 km · Minas 150 km · La Paloma 161 km · Arroio Grande 164 km · San Carlos 180 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

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 Treinta y Tres (-33.231°, -54.3858°, elevation 55 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).

	Avg high (°C)	Avg low (°C)
1	21	12
2	21	12
3	21	12
4	21	11
5	21	11
6	21	11
7	21	11
8	21	11
9	20	11
10	20	11
11	20	11
12	20	11
13	20	11
14	20	11
15	20	11
16	20	11
17	19	10
18	19	10
19	19	10
20	19	10
21	19	10
22	19	10
23	19	10
24	18	10
25	18	10
26	18	10
27	18	9
28	18	9
29	18	9
30	18	9
31	18	9

	Clearer (%)	Cloudier (%)
1	49	51
2	49	51
3	49	51
4	49	51
5	49	51
6	49	51
7	49	51
8	49	51
9	49	51
10	48	52
11	48	52
12	47	53
13	47	53
14	46	54
15	46	54
16	44	56
17	44	56
18	44	56
19	43	57
20	42	58
21	42	58
22	42	58
23	42	58
24	42	58
25	42	58
26	42	58
27	42	58
28	41	59
29	42	58
30	42	58
31	43	57

	Rain chance (%)
1	25
2	25
3	24
4	24
5	23
6	23
7	22
8	22
9	21
10	21
11	21
12	21
13	21
14	21
15	21
16	21
17	22
18	22
19	22
20	22
21	23
22	23
23	23
24	23
25	24
26	24
27	24
28	24
29	24
30	24
31	24

	Dry (%)	Comfortable (%)	Humid (%)	Muggy (%)
1	56	22	17	5
2	59	21	16	4
3	59	21	16	4
4	60	21	15	4
5	60	21	15	4
6	61	21	15	3
7	62	21	14	3
8	62	21	14	3
9	64	21	13	2
10	63	22	13	2
11	63	22	13	2
12	63	22	13	2
13	63	22	13	2
14	63	22	13	2
15	63	22	13	2
16	63	22	13	2
17	64	22	13	1
18	65	21	13	1
19	65	21	13	1
20	65	21	13	1
21	67	20	12	1
22	66	20	12	2
23	67	19	12	2
24	69	18	11	2
25	69	18	11	2
26	71	17	10	2
27	72	16	10	2
28	74	15	9	2
29	74	15	9	2
30	76	14	8	2
31	77	14	7	2

	Avg high (°C)	Avg low (°C)
1	21	12
2	21	12
3	21	12
4	21	11
5	21	11
6	21	11
7	21	11
8	21	11
9	20	11
10	20	11
11	20	11
12	20	11
13	20	11
14	20	11
15	20	11
16	20	11
17	19	10
18	19	10
19	19	10
20	19	10
21	19	10
22	19	10
23	19	10
24	18	10
25	18	10
26	18	10
27	18	9
28	18	9
29	18	9
30	18	9
31	18	9

	Clearer (%)	Cloudier (%)
1	49	51
2	49	51
3	49	51
4	49	51
5	49	51
6	49	51
7	49	51
8	49	51
9	49	51
10	48	52
11	48	52
12	47	53
13	47	53
14	46	54
15	46	54
16	44	56
17	44	56
18	44	56
19	43	57
20	42	58
21	42	58
22	42	58
23	42	58
24	42	58
25	42	58
26	42	58
27	42	58
28	41	59
29	42	58
30	42	58
31	43	57

	Rain chance (%)
1	25
2	25
3	24
4	24
5	23
6	23
7	22
8	22
9	21
10	21
11	21
12	21
13	21
14	21
15	21
16	21
17	22
18	22
19	22
20	22
21	23
22	23
23	23
24	23
25	24
26	24
27	24
28	24
29	24
30	24
31	24

	Dry (%)	Comfortable (%)	Humid (%)	Muggy (%)
1	56	22	17	5
2	59	21	16	4
3	59	21	16	4
4	60	21	15	4
5	60	21	15	4
6	61	21	15	3
7	62	21	14	3
8	62	21	14	3
9	64	21	13	2
10	63	22	13	2
11	63	22	13	2
12	63	22	13	2
13	63	22	13	2
14	63	22	13	2
15	63	22	13	2
16	63	22	13	2
17	64	22	13	1
18	65	21	13	1
19	65	21	13	1
20	65	21	13	1
21	67	20	12	1
22	66	20	12	2
23	67	19	12	2
24	69	18	11	2
25	69	18	11	2
26	71	17	10	2
27	72	16	10	2
28	74	15	9	2
29	74	15	9	2
30	76	14	8	2
31	77	14	7	2

	Avg high (°C)	Avg low (°C)
1	21	12
2	21	12
3	21	12
4	21	11
5	21	11
6	21	11
7	21	11
8	21	11
9	20	11
10	20	11
11	20	11
12	20	11
13	20	11
14	20	11
15	20	11
16	20	11
17	19	10
18	19	10
19	19	10
20	19	10
21	19	10
22	19	10
23	19	10
24	18	10
25	18	10
26	18	10
27	18	9
28	18	9
29	18	9
30	18	9
31	18	9

	Clearer (%)	Cloudier (%)
1	49	51
2	49	51
3	49	51
4	49	51
5	49	51
6	49	51
7	49	51
8	49	51
9	49	51
10	48	52
11	48	52
12	47	53
13	47	53
14	46	54
15	46	54
16	44	56
17	44	56
18	44	56
19	43	57
20	42	58
21	42	58
22	42	58
23	42	58
24	42	58
25	42	58
26	42	58
27	42	58
28	41	59
29	42	58
30	42	58
31	43	57

	Rain chance (%)
1	25
2	25
3	24
4	24
5	23
6	23
7	22
8	22
9	21
10	21
11	21
12	21
13	21
14	21
15	21
16	21
17	22
18	22
19	22
20	22
21	23
22	23
23	23
24	23
25	24
26	24
27	24
28	24
29	24
30	24
31	24

	Dry (%)	Comfortable (%)	Humid (%)	Muggy (%)
1	56	22	17	5
2	59	21	16	4
3	59	21	16	4
4	60	21	15	4
5	60	21	15	4
6	61	21	15	3
7	62	21	14	3
8	62	21	14	3
9	64	21	13	2
10	63	22	13	2
11	63	22	13	2
12	63	22	13	2
13	63	22	13	2
14	63	22	13	2
15	63	22	13	2
16	63	22	13	2
17	64	22	13	1
18	65	21	13	1
19	65	21	13	1
20	65	21	13	1
21	67	20	12	1
22	66	20	12	2
23	67	19	12	2
24	69	18	11	2
25	69	18	11	2
26	71	17	10	2
27	72	16	10	2
28	74	15	9	2
29	74	15	9	2
30	76	14	8	2
31	77	14	7	2