Rancagua weather in May

In May, Rancagua sees average daytime highs of 17°C and overnight lows near 4°C, with 99 mm of precipitation across 7.3 wet days and about 10.2 hours of daylight. It is the 9th-warmest and 4th-wettest month of the year here.

Highs ease over the month, from about 18°C in the first days to 15°C by the end. The sky is clear or mostly clear about 40% 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 9 h 54 min by month's end. Set against the rest of the year, May is Rancagua's 10th-clearest and 9th-windiest month. For the whole year in context, see Rancagua's year-round climate.

Daytime high: 17°; 9th warmest
Overnight low: 4°; 5th coldest
Precipitation: 99 mm; 7.3 wet days
Daylight: 10 h 12 min; 8:32 AM – 6:46 PM
Cloud cover: 54%; 10th clearest
Wind: 4 km/h; 9th windiest
Solar energy: 2.89 kWh/m²
Travel score: 5.7; out of 10

Rancagua is city in O'Higgins Region, Chile.

Air quality: High; PM2.5 25.9 µg/m³ · 2019
Density: 4,021/km²; people per km²
Founded: 1743

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

← April Rancagua 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 18°C in the first days to 15°C by the end.

A typical May day in Rancagua reaches about 17°C in the afternoon and slips back to 4°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 13°C and 21°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)	19	18	18	18	18	18	18	18	18	18	17	17	17	17	17	17	16	16	16	16	16	16	16	15	15	15	15	15	15	15	15
Avg low (°C)	5	5	5	5	5	5	5	5	5	5	5	5	5	5	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	3	3

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

Rancagua weather by month

How May compares with the rest of the year at a glance. May is the 9th-warmest and 4th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Snow days	Daylight (hours)	Travel score
Jan	26° / 14°	6	1.4	0	14	8.9
Feb	26° / 13°	7	1.5	0	13.3	8.9
Mar	24° / 11°	11	1.8	0	12.3	9.1
Apr	20° / 7°	44	3.9	0	11.2	7.7
May	17° / 4°	99	7.3	0.1	10.2	5.7
Jun	14° / 2°	167	9.4	1.4	9.8	3.9
Jul	13° / 1°	124	9.2	1.5	10	3.9
Aug	15° / 2°	108	8.6	1.2	10.7	4.7
Sep	17° / 4°	81	10	0.4	11.8	5.5
Oct	19° / 6°	60	8.5	0.2	12.9	6.6
Nov	22° / 9°	26	4.7	0	13.8	8.0
Dec	25° / 12°	13	2	0	14.2	8.9

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 40% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 11% of May, with mostly cloudy or overcast conditions the remaining 49%. 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 (%)	64	64	62	62	60	59	58	57	56	54	53	52	51	50	50	49	48	47	47	46	45	45	45	45	45	45	44	44	44	45	45
Cloudier (%)	36	36	38	38	40	41	42	43	44	46	47	48	49	50	50	51	52	53	53	54	55	55	55	55	55	55	56	56	56	55	55

	Clearer (%)	Cloudier (%)
1	64	36
2	64	36
3	62	38
4	62	38
5	60	40
6	59	41
7	58	42
8	57	43
9	56	44
10	54	46
11	53	47
12	52	48
13	51	49
14	50	50
15	50	50
16	49	51
17	48	52
18	47	53
19	47	53
20	46	54
21	45	55
22	45	55
23	45	55
24	45	55
25	45	55
26	45	55
27	44	56
28	44	56
29	44	56
30	45	55
31	45	55

Chance of precipitation in May

Any precipitationSnow

Rancagua gets around 99 mm of rain and snow over 7.3 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 23% and peaks near 30% on the wettest days, and about 0 day brings snow. The odds climb toward the end of the month.

	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 (%)	16	16	16	16	17	17	17	17	18	18	19	20	20	21	22	23	24	25	26	27	27	28	29	29	30	30	30	30	30	30	30
Snow chance (%)	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	1	1	1	1	1	1	1	2	2	2

	Rain chance (%)	Snow chance (%)
1	16	0
2	16	0
3	16	0
4	16	0
5	17	0
6	17	0
7	17	0
8	17	0
9	18	0
10	18	0
11	19	0
12	20	0
13	20	0
14	21	0
15	22	0
16	23	0
17	24	0
18	25	0
19	26	0
20	27	0
21	27	1
22	28	1
23	29	1
24	29	1
25	30	1
26	30	1
27	30	1
28	30	1
29	30	2
30	30	2
31	30	2

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 100% 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 (%)	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100

Wind in May

Winds average 4 km/h in May.

Across May, daily wind ranges from about 4 km/h on the calmest days to 5 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)	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	4	5	5	5	5	5	5	5	5	5	5	5
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	calm

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

Sunrise & sunset in May

DaylightNight

Daylight runs from about 10 h 42 min at the start of May to 9 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 48 minutes over May. Sunrise moves from 8:21 AM to 8:43 AM, and sunset from 7:00 PM to 6:38 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	10.6	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	10.1	10.1	10.1	10.1	10.0	10.0	10.0	10.0	10.0	9.9	9.9	9.9
Sunrise (AM)	8:21	8:21	8:22	8:23	8:24	8:25	8:25	8:26	8:27	8:28	8:29	8:29	8:30	8:31	8:32	8:32	8:33	8:34	8:35	8:35	8:36	8:37	8:38	8:38	8:39	8:40	8:40	8:41	8:42	8:42	8:43
Sunset (PM)	7:00	6:59	6:58	6:57	6:56	6:55	6:54	6:53	6:52	6:51	6:50	6:49	6:48	6:48	6:47	6:46	6:45	6:45	6:44	6:43	6:43	6:42	6:41	6:41	6:40	6:40	6:39	6:39	6:38	6:38	6:38

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	10.7	8:21	7:00
2	10.6	8:21	6:59
3	10.6	8:22	6:58
4	10.6	8:23	6:57
5	10.5	8:24	6:56
6	10.5	8:25	6:55
7	10.5	8:25	6:54
8	10.4	8:26	6:53
9	10.4	8:27	6:52
10	10.4	8:28	6:51
11	10.4	8:29	6:50
12	10.3	8:29	6:49
13	10.3	8:30	6:48
14	10.3	8:31	6:48
15	10.3	8:32	6:47
16	10.2	8:32	6:46
17	10.2	8:33	6:45
18	10.2	8:34	6:45
19	10.2	8:35	6:44
20	10.1	8:35	6:43
21	10.1	8:36	6:43
22	10.1	8:37	6:42
23	10.1	8:38	6:41
24	10.0	8:38	6:41
25	10.0	8:39	6:40
26	10.0	8:40	6:40
27	10.0	8:40	6:39
28	10.0	8:41	6:39
29	9.9	8:42	6:38
30	9.9	8:42	6:38
31	9.9	8:43	6:38

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 2.89 kWh/m².

For context, solar energy here swings from a low near 2.16 kWh/m² to a high of 8.81 kWh/m² in January across the year — May's 2.89 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)	3.6	3.6	3.5	3.5	3.4	3.4	3.4	3.3	3.3	3.2	3.1	3.1	3.0	3.0	2.9	2.9	2.8	2.8	2.7	2.7	2.6	2.6	2.6	2.5	2.5	2.5	2.4	2.4	2.4	2.4	2.4
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	3.6	Moderate
2	3.6	Moderate
3	3.5	Moderate
4	3.5	Moderate
5	3.4	Moderate
6	3.4	Moderate
7	3.4	Moderate
8	3.3	Moderate
9	3.3	Moderate
10	3.2	Moderate
11	3.1	Moderate
12	3.1	Moderate
13	3.0	Moderate
14	3.0	Moderate
15	2.9	Moderate
16	2.9	Moderate
17	2.8	Moderate
18	2.8	Moderate
19	2.7	Moderate
20	2.7	Moderate
21	2.6	Moderate
22	2.6	Moderate
23	2.6	Moderate
24	2.5	Moderate
25	2.5	Moderate
26	2.5	Moderate
27	2.4	Moderate
28	2.4	Moderate
29	2.4	Moderate
30	2.4	Moderate
31	2.4	Moderate

Planning a trip in May

Hazard calendar for Rancagua

In seasonPeak

In May, Rancagua sits inside its rainy season season. The full year is below, with each hazard's peak months called out.

Rancagua's rainy season runs May–September, when most of the year's rain falls.

Rainy season

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Is May a good time to visit Rancagua?

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

5.7

Sightseeing

8th-best month of the year

1.2

Beach & pool

9th-best month of the year

May is a reasonable time to visit Rancagua for sightseeing.

What to pack for Rancagua in May

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

In May, Rancagua sees daytime highs around 17°C and nights near 4°C. Worth packing: a warm layer. About 7 days see rain.

a warm layer

UV index in Rancagua in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 3. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Rancagua peaks around January 16 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near May 24 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	13	12	10	5	3	3	3	3	6	9	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	5	High
May	3	Moderate
Jun	3	Moderate
Jul	3	Moderate
Aug	3	Moderate
Sep	6	High
Oct	9	Very high
Nov	11	Extreme
Dec	12	Extreme

Air quality in Rancagua in May

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where May falls, not just the annual average.

Air quality in Rancagua is worst in July — around 35 µg/m³ PM2.5 (poor), about 2.1× the cleanest month (December, 17 µg/m³).

Seasonal pattern from CAMS reanalysis, scaled to Rancagua's WHO annual average of 25.9 µg/m³.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
PM2.5 (µg/m³)	22	19	18	25	34	34	35	34	31	24	18	17
Level	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Poor	Moderate	Moderate	Moderate	Moderate	Moderate

	PM2.5 (µg/m³)	Level
Jan	22	Moderate
Feb	19	Moderate
Mar	18	Moderate
Apr	25	Moderate
May	34	Moderate
Jun	34	Moderate
Jul	35	Poor
Aug	34	Moderate
Sep	31	Moderate
Oct	24	Moderate
Nov	18	Moderate
Dec	17	Moderate

Location & terrain

Where is Rancagua?

Rancagua sits at 34.2°S, 70.7°W, 520 m above sea level, in Chile. The nearest listed city is Machalí, 8.0 km away.

Topography around Rancagua

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

Within 3 km, the terrain around Rancagua has only modest variations in elevation — a maximum elevation change of 70 m around an average of 502 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,373 m; within 80 km, extreme variations in elevation — a maximum elevation change of 5,124 m.

The land around Rancagua is covered by artificial surfaces (74%) within 3 km, shrubs (28%), cropland (25%) and trees (22%) within 16 km, and bare terrain (24%) and trees (20%) within 80 km.

3 km

70 m

artificial surfaces 74%

16 km

1,373 m

shrubs 28%

80 km

5,124 m

bare terrain 24%

treesshrubsgrasslandcroplandartificial surfacesbare terrainsnow and icewater

← April Rancagua year-round climate June →Best places to visit in May

May weather nearby: Machalí 8.0 km · Graneros 11 km · Rengo 29 km · Paine 40 km · San Vicente 43 km · San Vicente de Tagua Tagua 43 km · Buin 49 km · Talagante 59 km

Chile travel facts

Travel advisory: Level 2; Exercise Increased Caution
Power plugs: Type C / F / L; 220 V · 50 Hz
Prices: ≈ 48% of US; price level, 2025
GDP per capita: $17,995; 2025
Happiness: 6.3 / 10; World Happiness, 2025
Safe drinking water: 98%; of population, 2024
Homicide rate: 6.3; per 100k, 2023
Road deaths: 14.9; per 100k/yr, 2019
Income group: High; World Bank
English: Moderate; EF EPI 517
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 Rancagua (-34.1691°, -70.7405°, elevation 520 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).

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

	Clearer (%)	Cloudier (%)
1	64	36
2	64	36
3	62	38
4	62	38
5	60	40
6	59	41
7	58	42
8	57	43
9	56	44
10	54	46
11	53	47
12	52	48
13	51	49
14	50	50
15	50	50
16	49	51
17	48	52
18	47	53
19	47	53
20	46	54
21	45	55
22	45	55
23	45	55
24	45	55
25	45	55
26	45	55
27	44	56
28	44	56
29	44	56
30	45	55
31	45	55

	Rain chance (%)	Snow chance (%)
1	16	0
2	16	0
3	16	0
4	16	0
5	17	0
6	17	0
7	17	0
8	17	0
9	18	0
10	18	0
11	19	0
12	20	0
13	20	0
14	21	0
15	22	0
16	23	0
17	24	0
18	25	0
19	26	0
20	27	0
21	27	1
22	28	1
23	29	1
24	29	1
25	30	1
26	30	1
27	30	1
28	30	1
29	30	2
30	30	2
31	30	2

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100

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

	Clearer (%)	Cloudier (%)
1	64	36
2	64	36
3	62	38
4	62	38
5	60	40
6	59	41
7	58	42
8	57	43
9	56	44
10	54	46
11	53	47
12	52	48
13	51	49
14	50	50
15	50	50
16	49	51
17	48	52
18	47	53
19	47	53
20	46	54
21	45	55
22	45	55
23	45	55
24	45	55
25	45	55
26	45	55
27	44	56
28	44	56
29	44	56
30	45	55
31	45	55

	Rain chance (%)	Snow chance (%)
1	16	0
2	16	0
3	16	0
4	16	0
5	17	0
6	17	0
7	17	0
8	17	0
9	18	0
10	18	0
11	19	0
12	20	0
13	20	0
14	21	0
15	22	0
16	23	0
17	24	0
18	25	0
19	26	0
20	27	0
21	27	1
22	28	1
23	29	1
24	29	1
25	30	1
26	30	1
27	30	1
28	30	1
29	30	2
30	30	2
31	30	2

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100

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

	Clearer (%)	Cloudier (%)
1	64	36
2	64	36
3	62	38
4	62	38
5	60	40
6	59	41
7	58	42
8	57	43
9	56	44
10	54	46
11	53	47
12	52	48
13	51	49
14	50	50
15	50	50
16	49	51
17	48	52
18	47	53
19	47	53
20	46	54
21	45	55
22	45	55
23	45	55
24	45	55
25	45	55
26	45	55
27	44	56
28	44	56
29	44	56
30	45	55
31	45	55

	Rain chance (%)	Snow chance (%)
1	16	0
2	16	0
3	16	0
4	16	0
5	17	0
6	17	0
7	17	0
8	17	0
9	18	0
10	18	0
11	19	0
12	20	0
13	20	0
14	21	0
15	22	0
16	23	0
17	24	0
18	25	0
19	26	0
20	27	0
21	27	1
22	28	1
23	29	1
24	29	1
25	30	1
26	30	1
27	30	1
28	30	1
29	30	2
30	30	2
31	30	2

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100