Chillán Viejo weather in May

In May, Chillán Viejo sees average daytime highs of 15°C and overnight lows near 7°C, with 157 mm of rain across 9.6 wet days and about 10.1 hours of daylight. It is the 9th-warmest and 3rd-wettest month of the year here.

Highs ease over the month, from about 17°C in the first days to 14°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 30 min at the start of May to 9 h 42 min by month's end. Set against the rest of the year, May is Chillán Viejo's 11th-clearest and 12th-windiest month. For the whole year in context, see Chillán Viejo's year-round climate.

Daytime high: 15°; 9th warmest
Overnight low: 7°; 5th coldest
Rainfall: 157 mm; 9.6 wet days
Daylight: 10 h 06 min; 8:43 AM – 6:46 PM
Cloud cover: 63%; 11th clearest
Wind: 10 km/h; 12th windiest
Solar energy: 2.49 kWh/m²
Travel score: 4.8; out of 10

Chillán Viejo is city in Chile.

Density: 3,158/km²; people per km²
Founded: 1895

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

← April Chillán Viejo 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 17°C in the first days to 14°C by the end.

A typical May day in Chillán Viejo reaches about 15°C in the afternoon and slips back to 7°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 18°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)	17	17	17	17	17	17	17	17	16	16	16	16	16	16	15	15	15	15	15	15	15	15	14	14	14	14	14	14	14	14	14
Avg low (°C)	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	7	6	6	6	6	6	6	6	6	6	6	6	6	6	6

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

Chillán Viejo weather by month

How May compares with the rest of the year at a glance. May is the 9th-warmest and 3rd-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	27° / 13°	8	1.1	14.2	8.6
Feb	27° / 12°	18	1.6	13.4	8.6
Mar	24° / 11°	21	2.7	12.3	8.7
Apr	20° / 8°	60	5.2	11.1	7.1
May	15° / 7°	157	9.6	10.1	4.8
Jun	13° / 6°	214	13.3	9.5	3.2
Jul	13° / 4°	159	11.7	9.8	3.3
Aug	14° / 5°	132	11.3	10.6	4.1
Sep	16° / 6°	72	6.9	11.8	5.6
Oct	19° / 8°	49	6.5	12.9	6.8
Nov	22° / 9°	25	3.1	14	8.2
Dec	25° / 11°	16	2.4	14.5	8.7

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 12% of May, with mostly cloudy or overcast conditions the remaining 59%. 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 (%)	52	51	50	50	48	47	46	45	45	44	43	42	40	39	39	38	37	38	37	36	36	36	36	36	36	36	36	37	38	38	37
Cloudier (%)	48	49	50	50	52	53	54	55	55	56	57	58	60	61	61	62	63	62	63	64	64	64	64	64	64	64	64	63	62	62	63

	Clearer (%)	Cloudier (%)
1	52	48
2	51	49
3	50	50
4	50	50
5	48	52
6	47	53
7	46	54
8	45	55
9	45	55
10	44	56
11	43	57
12	42	58
13	40	60
14	39	61
15	39	61
16	38	62
17	37	63
18	38	62
19	37	63
20	36	64
21	36	64
22	36	64
23	36	64
24	36	64
25	36	64
26	36	64
27	36	64
28	37	63
29	38	62
30	38	62
31	37	63

Chance of precipitation in May

Any precipitation

Chillán Viejo gets around 157 mm of rain over 9.6 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 31% and peaks near 40% on the wettest days. 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 (%)	22	22	22	23	23	23	24	24	25	25	26	27	28	29	30	31	32	33	34	35	36	36	37	38	38	38	39	39	39	40	40

	Rain chance (%)
1	22
2	22
3	22
4	23
5	23
6	23
7	24
8	24
9	25
10	25
11	26
12	27
13	28
14	29
15	30
16	31
17	32
18	33
19	34
20	35
21	36
22	36
23	37
24	38
25	38
26	38
27	39
28	39
29	39
30	40
31	40

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 97% 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 (%)	97	97	97	97	97	97	98	98	98	98	98	98	98	98	98	98	98	98	97	97	97	97	97	97	97	97	97	97	97	97	98
Comfortable (%)	3	3	3	3	3	3	2	2	2	2	2	2	2	2	2	2	2	2	3	3	3	3	3	3	3	3	3	3	3	3	2

	Dry (%)	Comfortable (%)
1	97	3
2	97	3
3	97	3
4	97	3
5	97	3
6	97	3
7	98	2
8	98	2
9	98	2
10	98	2
11	98	2
12	98	2
13	98	2
14	98	2
15	98	2
16	98	2
17	98	2
18	98	2
19	97	3
20	97	3
21	97	3
22	97	3
23	97	3
24	97	3
25	97	3
26	97	3
27	97	3
28	97	3
29	97	3
30	97	3
31	98	2

Wind in May

Winds average 10 km/h in May, the calmest month.

Across May, 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	31
Wind speed (km/h)	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	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	calm

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

Sunrise & sunset in May

DaylightNight

Daylight runs from about 10 h 30 min at the start of May to 9 h 42 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 8:30 AM to 8:55 AM, and sunset from 7:01 PM to 6:37 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)	10.5	10.5	10.5	10.4	10.4	10.4	10.3	10.3	10.3	10.2	10.2	10.2	10.1	10.1	10.1	10.1	10.0	10.0	10.0	9.9	9.9	9.9	9.9	9.9	9.8	9.8	9.8	9.8	9.7	9.7	9.7
Sunrise (AM)	8:30	8:31	8:32	8:33	8:34	8:34	8:35	8:36	8:37	8:38	8:39	8:40	8:41	8:41	8:42	8:43	8:44	8:45	8:46	8:46	8:47	8:48	8:49	8:50	8:50	8:51	8:52	8:53	8:53	8:54	8:55
Sunset (PM)	7:01	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	6:47	6:46	6:46	6:45	6:44	6:43	6:43	6:42	6:41	6:41	6:40	6:40	6:39	6:38	6:38	6:38	6:37

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	10.5	8:30	7:01
2	10.5	8:31	7:00
3	10.5	8:32	6:59
4	10.4	8:33	6:58
5	10.4	8:34	6:57
6	10.4	8:34	6:56
7	10.3	8:35	6:55
8	10.3	8:36	6:54
9	10.3	8:37	6:53
10	10.2	8:38	6:52
11	10.2	8:39	6:51
12	10.2	8:40	6:50
13	10.1	8:41	6:49
14	10.1	8:41	6:48
15	10.1	8:42	6:47
16	10.1	8:43	6:46
17	10.0	8:44	6:46
18	10.0	8:45	6:45
19	10.0	8:46	6:44
20	9.9	8:46	6:43
21	9.9	8:47	6:43
22	9.9	8:48	6:42
23	9.9	8:49	6:41
24	9.9	8:50	6:41
25	9.8	8:50	6:40
26	9.8	8:51	6:40
27	9.8	8:52	6:39
28	9.8	8:53	6:38
29	9.7	8:53	6:38
30	9.7	8:54	6:38
31	9.7	8:55	6:37

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 2.49 kWh/m².

For context, solar energy here swings from a low near 1.85 kWh/m² to a high of 8.63 kWh/m² in January across the year — May's 2.49 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)	3.2	3.1	3.1	3.0	3.0	2.9	2.9	2.8	2.8	2.8	2.7	2.6	2.6	2.6	2.5	2.5	2.4	2.4	2.4	2.3	2.3	2.3	2.2	2.2	2.2	2.1	2.1	2.1	2.1	2.1	2.0
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	3.2	Moderate
2	3.1	Moderate
3	3.1	Moderate
4	3.0	Moderate
5	3.0	Moderate
6	2.9	Moderate
7	2.9	Moderate
8	2.8	Moderate
9	2.8	Moderate
10	2.8	Moderate
11	2.7	Moderate
12	2.6	Moderate
13	2.6	Moderate
14	2.6	Moderate
15	2.5	Moderate
16	2.5	Moderate
17	2.4	Moderate
18	2.4	Moderate
19	2.4	Moderate
20	2.3	Moderate
21	2.3	Moderate
22	2.3	Moderate
23	2.2	Moderate
24	2.2	Moderate
25	2.2	Moderate
26	2.1	Moderate
27	2.1	Moderate
28	2.1	Moderate
29	2.1	Moderate
30	2.1	Moderate
31	2.0	Moderate

Planning a trip in May

Hazard calendar for Chillán Viejo

In seasonPeak

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

Chillán Viejo's rainy season runs May–August, 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 Chillán Viejo?

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

4.8

Sightseeing

9th-best month of the year

0.5

Beach & pool

9th-best month of the year

May is a reasonable time to visit Chillán Viejo for sightseeing.

What to pack for Chillán Viejo in May

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

In May, Chillán Viejo sees daytime highs around 15°C and nights near 7°C. Worth packing: a warm layer and rain gear. About 10 days see rain.

a warm layerrain gear

UV index in Chillán Viejo 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 Chillán Viejo peaks around January 14 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 16 at about 2 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 9 months of the year.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	13	11	9	5	3	2	3	3	5	8	10	12
Level	Extreme	Extreme	Very high	Moderate	Moderate	Moderate	Moderate	Moderate	High	Very high	Extreme	Extreme

	UV index (midday)	Level
Jan	13	Extreme
Feb	11	Extreme
Mar	9	Very high
Apr	5	Moderate
May	3	Moderate
Jun	2	Moderate
Jul	3	Moderate
Aug	3	Moderate
Sep	5	High
Oct	8	Very high
Nov	10	Extreme
Dec	12	Extreme

Air quality in Chillán Viejo 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 Chillán Viejo is worst in April — around 40 µg/m³ PM2.5 (poor), about 4.6× the cleanest month (December, 9 µg/m³).

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

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
PM2.5 (µg/m³)	14	25	30	40	27	15	15	14	13	12	10	9
Level	Moderate	Moderate	Moderate	Poor	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Good	Good

	PM2.5 (µg/m³)	Level
Jan	14	Moderate
Feb	25	Moderate
Mar	30	Moderate
Apr	40	Poor
May	27	Moderate
Jun	15	Moderate
Jul	15	Moderate
Aug	14	Moderate
Sep	13	Moderate
Oct	12	Moderate
Nov	10	Good
Dec	9	Good

Location & terrain

Where is Chillán Viejo?

Chillán Viejo sits at 36.6°S, 72.1°W, 117 m above sea level, in Chile. The nearest listed city is Chillán, 3.0 km away.

Topography around Chillán Viejo

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

Within 3 km, the terrain around Chillán Viejo has only modest variations in elevation — a maximum elevation change of 50 m around an average of 105 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 189 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,164 m.

The land around Chillán Viejo is covered by artificial surfaces (39%), grassland (25%) and cropland (20%) within 3 km, trees (33%), grassland (33%) and cropland (26%) within 16 km, and trees (50%) and grassland (26%) within 80 km.

3 km

50 m

artificial surfaces 39%

16 km

189 m

trees 33%

80 km

3,164 m

trees 50%

treesshrubsgrasslandcroplandartificial surfacesbare terrainwater

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

May weather nearby: Chillán 3.0 km · Coihueco 27 km · San Carlos 27 km · Quillón 33 km · Cabrero 52 km · Coelemu 53 km · Parral 60 km · Tomé 74 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 Chillán Viejo (-36.623°, -72.1319°, elevation 117 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	17	7
2	17	7
3	17	7
4	17	7
5	17	7
6	17	7
7	17	7
8	17	7
9	16	7
10	16	7
11	16	7
12	16	7
13	16	7
14	16	7
15	15	7
16	15	7
17	15	7
18	15	6
19	15	6
20	15	6
21	15	6
22	15	6
23	14	6
24	14	6
25	14	6
26	14	6
27	14	6
28	14	6
29	14	6
30	14	6
31	14	6

	Clearer (%)	Cloudier (%)
1	52	48
2	51	49
3	50	50
4	50	50
5	48	52
6	47	53
7	46	54
8	45	55
9	45	55
10	44	56
11	43	57
12	42	58
13	40	60
14	39	61
15	39	61
16	38	62
17	37	63
18	38	62
19	37	63
20	36	64
21	36	64
22	36	64
23	36	64
24	36	64
25	36	64
26	36	64
27	36	64
28	37	63
29	38	62
30	38	62
31	37	63

	Rain chance (%)
1	22
2	22
3	22
4	23
5	23
6	23
7	24
8	24
9	25
10	25
11	26
12	27
13	28
14	29
15	30
16	31
17	32
18	33
19	34
20	35
21	36
22	36
23	37
24	38
25	38
26	38
27	39
28	39
29	39
30	40
31	40

	Dry (%)	Comfortable (%)
1	97	3
2	97	3
3	97	3
4	97	3
5	97	3
6	97	3
7	98	2
8	98	2
9	98	2
10	98	2
11	98	2
12	98	2
13	98	2
14	98	2
15	98	2
16	98	2
17	98	2
18	98	2
19	97	3
20	97	3
21	97	3
22	97	3
23	97	3
24	97	3
25	97	3
26	97	3
27	97	3
28	97	3
29	97	3
30	97	3
31	98	2

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

	Clearer (%)	Cloudier (%)
1	52	48
2	51	49
3	50	50
4	50	50
5	48	52
6	47	53
7	46	54
8	45	55
9	45	55
10	44	56
11	43	57
12	42	58
13	40	60
14	39	61
15	39	61
16	38	62
17	37	63
18	38	62
19	37	63
20	36	64
21	36	64
22	36	64
23	36	64
24	36	64
25	36	64
26	36	64
27	36	64
28	37	63
29	38	62
30	38	62
31	37	63

	Rain chance (%)
1	22
2	22
3	22
4	23
5	23
6	23
7	24
8	24
9	25
10	25
11	26
12	27
13	28
14	29
15	30
16	31
17	32
18	33
19	34
20	35
21	36
22	36
23	37
24	38
25	38
26	38
27	39
28	39
29	39
30	40
31	40

	Dry (%)	Comfortable (%)
1	97	3
2	97	3
3	97	3
4	97	3
5	97	3
6	97	3
7	98	2
8	98	2
9	98	2
10	98	2
11	98	2
12	98	2
13	98	2
14	98	2
15	98	2
16	98	2
17	98	2
18	98	2
19	97	3
20	97	3
21	97	3
22	97	3
23	97	3
24	97	3
25	97	3
26	97	3
27	97	3
28	97	3
29	97	3
30	97	3
31	98	2

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

	Clearer (%)	Cloudier (%)
1	52	48
2	51	49
3	50	50
4	50	50
5	48	52
6	47	53
7	46	54
8	45	55
9	45	55
10	44	56
11	43	57
12	42	58
13	40	60
14	39	61
15	39	61
16	38	62
17	37	63
18	38	62
19	37	63
20	36	64
21	36	64
22	36	64
23	36	64
24	36	64
25	36	64
26	36	64
27	36	64
28	37	63
29	38	62
30	38	62
31	37	63

	Rain chance (%)
1	22
2	22
3	22
4	23
5	23
6	23
7	24
8	24
9	25
10	25
11	26
12	27
13	28
14	29
15	30
16	31
17	32
18	33
19	34
20	35
21	36
22	36
23	37
24	38
25	38
26	38
27	39
28	39
29	39
30	40
31	40

	Dry (%)	Comfortable (%)
1	97	3
2	97	3
3	97	3
4	97	3
5	97	3
6	97	3
7	98	2
8	98	2
9	98	2
10	98	2
11	98	2
12	98	2
13	98	2
14	98	2
15	98	2
16	98	2
17	98	2
18	98	2
19	97	3
20	97	3
21	97	3
22	97	3
23	97	3
24	97	3
25	97	3
26	97	3
27	97	3
28	97	3
29	97	3
30	97	3
31	98	2