Aosta weather in May

In May, Aosta sees average daytime highs of 8°C and overnight lows near 0°C, with 112 mm of precipitation across 16.3 wet days and about 14.7 hours of daylight. It is the 5th-warmest and 2nd-wettest month of the year here.

Highs climb over the month, from about 6°C in the first days to 10°C by the end. The sky is clear or mostly clear about 20% of the time in May, and the air most often feels dry.

Daylight stretches from about 14 h 06 min at the start of May to 15 h 12 min by month's end. Set against the rest of the year, May is Aosta's 12th-clearest and 3rd-windiest month. For the whole year in context, see Aosta's year-round climate.

Daytime high: 8°; 5th warmest
Overnight low: 0°; 8th coldest
Precipitation: 112 mm; 16.3 wet days
Daylight: 14 h 42 min; 5:06 AM – 7:48 PM
Cloud cover: 65%; 12th clearest
Wind: 4 km/h; 3rd windiest
Solar energy: 6 kWh/m²
Travel score: 1.1; out of 10

Air quality: Moderate; PM2.5 10.5 µg/m³ · 2019

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

← April Aosta 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 climb over the month, from about 6°C in the first days to 10°C by the end.

A typical May day in Aosta reaches about 8°C in the afternoon and slips back to 0°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 3°C and 13°C. Set against its neighbours, May runs about 5°C warmer than April and about 6°C cooler 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)	5	6	6	6	6	6	6	7	7	7	7	7	7	7	8	8	8	8	8	9	9	9	9	9	10	10	10	10	10	11	11
Avg low (°C)	-1	-1	-1	-1	-1	-1	-1	-1	-1	-1	0	0	0	0	0	0	0	0	0	1	1	1	1	1	1	1	2	2	2	2	2

	Avg high (°C)	Avg low (°C)
1	5	-1
2	6	-1
3	6	-1
4	6	-1
5	6	-1
6	6	-1
7	6	-1
8	7	-1
9	7	-1
10	7	-1
11	7	0
12	7	0
13	7	0
14	7	0
15	8	0
16	8	0
17	8	0
18	8	0
19	8	0
20	9	1
21	9	1
22	9	1
23	9	1
24	9	1
25	10	1
26	10	1
27	10	2
28	10	2
29	10	2
30	11	2
31	11	2

How May really feels in Aosta

Once humidity and wind are folded in, May averages 0 days that feel above 32°C and 16 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C

heat index over the day's high

Days feeling ≤ 0°C

wind chill below the day's low

The story in May is cold — wind chill drags the overnight "feels like" below the raw low.

Aosta weather by month

How May compares with the rest of the year at a glance. May is the 5th-warmest and 2nd-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Snow days	Daylight (hours)	Travel score
Jan	-6° / -12°	100	11.9	12.8	8.9	0.0
Feb	-4° / -12°	79	10.9	12	10.1	0.0
Mar	0° / -8°	88	12	13.2	11.6	0.0
Apr	3° / -4°	97	13	13.3	13.3	0.0
May	8° / 0°	112	16.3	8.2	14.7	1.1
Jun	13° / 4°	105	16.7	2.3	15.4	3.3
Jul	16° / 7°	95	15.7	0.8	15.1	4.6
Aug	16° / 6°	87	13.9	0.7	13.9	4.6
Sep	12° / 3°	89	12.7	2.9	12.3	2.9
Oct	7° / -1°	98	12.4	7.9	10.7	0.7
Nov	-0° / -7°	124	13.3	13.6	9.3	0.0
Dec	-5° / -11°	110	12.7	13.6	8.5	0.0

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 20% of the time in May, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 18% of May, with mostly cloudy or overcast conditions the remaining 61%.

	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 (%)	34	34	34	34	34	34	35	35	35	36	36	36	36	37	38	39	39	41	41	41	42	42	42	42	42	42	42	41	41	41	40
Cloudier (%)	66	66	66	66	66	66	65	65	65	64	64	64	64	63	62	61	61	59	59	59	58	58	58	58	58	58	58	59	59	59	60

	Clearer (%)	Cloudier (%)
1	34	66
2	34	66
3	34	66
4	34	66
5	34	66
6	34	66
7	35	65
8	35	65
9	35	65
10	36	64
11	36	64
12	36	64
13	36	64
14	37	63
15	38	62
16	39	61
17	39	61
18	41	59
19	41	59
20	41	59
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	41	59
30	41	59
31	40	60

Chance of precipitation in May

Any precipitationSnow

Aosta gets around 112 mm of rain and snow over 16.3 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 53% and peaks near 58% on the wettest days, and about 8 days bring snow.

	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 (%)	52	53	53	53	54	54	53	53	53	53	53	52	52	52	52	52	52	52	52	51	51	52	52	52	53	54	54	55	56	57	58
Snow chance (%)	41	41	40	39	38	37	35	34	33	32	31	30	29	28	28	27	26	25	24	23	22	21	20	19	18	17	16	16	15	14	14

	Rain chance (%)	Snow chance (%)
1	52	41
2	53	41
3	53	40
4	53	39
5	54	38
6	54	37
7	53	35
8	53	34
9	53	33
10	53	32
11	53	31
12	52	30
13	52	29
14	52	28
15	52	28
16	52	27
17	52	26
18	52	25
19	52	24
20	51	23
21	51	22
22	52	21
23	52	20
24	52	19
25	53	18
26	54	17
27	54	16
28	55	16
29	56	15
30	57	14
31	58	14

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 4 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	4	4	4	4	4	4	4	4	4	4	4
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	4	calm
22	4	calm
23	4	calm
24	4	calm
25	4	calm
26	4	calm
27	4	calm
28	4	calm
29	4	calm
30	4	calm
31	4	calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 14 h 06 min at the start of May to 15 h 12 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 66 minutes over May. Sunrise moves from 5:26 AM to 4:52 AM, and sunset from 7:29 PM to 8:05 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)	14.1	14.1	14.1	14.2	14.2	14.3	14.3	14.4	14.4	14.5	14.5	14.6	14.6	14.6	14.7	14.7	14.8	14.8	14.8	14.9	14.9	14.9	15.0	15.0	15.0	15.1	15.1	15.1	15.2	15.2	15.2
Sunrise (AM)	5:26	5:25	5:23	5:22	5:20	5:19	5:17	5:16	5:15	5:13	5:12	5:11	5:09	5:08	5:07	5:06	5:04	5:03	5:02	5:01	5:00	4:59	4:58	4:57	4:56	4:55	4:55	4:54	4:53	4:52	4:52
Sunset (PM)	7:29	7:31	7:32	7:33	7:35	7:36	7:37	7:39	7:40	7:41	7:42	7:44	7:45	7:46	7:47	7:48	7:50	7:51	7:52	7:53	7:54	7:55	7:56	7:57	7:59	8:00	8:01	8:02	8:03	8:04	8:05

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	14.1	5:26	7:29
2	14.1	5:25	7:31
3	14.1	5:23	7:32
4	14.2	5:22	7:33
5	14.2	5:20	7:35
6	14.3	5:19	7:36
7	14.3	5:17	7:37
8	14.4	5:16	7:39
9	14.4	5:15	7:40
10	14.5	5:13	7:41
11	14.5	5:12	7:42
12	14.6	5:11	7:44
13	14.6	5:09	7:45
14	14.6	5:08	7:46
15	14.7	5:07	7:47
16	14.7	5:06	7:48
17	14.8	5:04	7:50
18	14.8	5:03	7:51
19	14.8	5:02	7:52
20	14.9	5:01	7:53
21	14.9	5:00	7:54
22	14.9	4:59	7:55
23	15.0	4:58	7:56
24	15.0	4:57	7:57
25	15.0	4:56	7:59
26	15.1	4:55	8:00
27	15.1	4:55	8:01
28	15.1	4:54	8:02
29	15.2	4:53	8:03
30	15.2	4:52	8:04
31	15.2	4:52	8:05

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 6 kWh/m².

For context, solar energy here swings from a low near 1.55 kWh/m² to a high of 6.01 kWh/m² in June across the year — May's 6 kWh/m² sits near the top of that range.

	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)	5.7	5.8	5.8	5.8	5.8	5.8	5.8	5.9	5.9	5.9	5.9	6.0	6.0	6.0	6.0	6.0	6.0	6.1	6.1	6.1	6.1	6.1	6.1	6.1	6.1	6.0	6.0	6.0	6.0	6.0	6.0
Level	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Bright	Bright	Bright

	Solar energy (kWh/m²)	Level
1	5.7	Bright
2	5.8	Bright
3	5.8	Bright
4	5.8	Bright
5	5.8	Bright
6	5.8	Bright
7	5.8	Bright
8	5.9	Bright
9	5.9	Bright
10	5.9	Bright
11	5.9	Bright
12	6.0	Bright
13	6.0	Bright
14	6.0	Intense
15	6.0	Intense
16	6.0	Intense
17	6.0	Intense
18	6.1	Intense
19	6.1	Intense
20	6.1	Intense
21	6.1	Intense
22	6.1	Intense
23	6.1	Intense
24	6.1	Intense
25	6.1	Intense
26	6.0	Intense
27	6.0	Intense
28	6.0	Intense
29	6.0	Bright
30	6.0	Bright
31	6.0	Bright

Planning a trip in May

Is May a good time to visit Aosta?

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

1.1

Sightseeing

5th-best month of the year

—

Beach & pool

never really warm enough

May is a weaker month for outdoor sightseeing in Aosta.

What to pack for Aosta in May

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

In May, Aosta sees daytime highs around 8°C and nights near 0°C. Pack a warm layer, rain gear and sun protection. Worth having: a heavy coat. About 16 days see rain.

a warm layerrain gearsun protectiona heavy coat

UV index in Aosta in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Aosta peaks around July 15 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 at about 2 (low).

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)	2	3	6	8	9	9	10	8	6	4	2	2
Level	Low	Moderate	High	Very high	Very high	Very high	Very high	Very high	High	Moderate	Moderate	Low

	UV index (midday)	Level
Jan	2	Low
Feb	3	Moderate
Mar	6	High
Apr	8	Very high
May	9	Very high
Jun	9	Very high
Jul	10	Very high
Aug	8	Very high
Sep	6	High
Oct	4	Moderate
Nov	2	Moderate
Dec	2	Low

Location & terrain

Where is Aosta?

Aosta sits at 45.7°N, 7.3°E, 583 m above sea level, in Italy. The nearest listed city is Chamonix, 40 km away.

Topography around Aosta

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

Within 3 km, the terrain around Aosta has large variations in elevation — a maximum elevation change of 983 m around an average of 764 m above sea level; within 16 km, extreme variations in elevation — a maximum elevation change of 3,150 m; within 80 km, extreme variations in elevation — a maximum elevation change of 4,625 m.

The land around Aosta is covered by trees (48%), grassland (27%) and artificial surfaces (23%) within 3 km, trees (48%) and grassland (35%) within 16 km, and trees (42%) and grassland (32%) within 80 km.

3 km

983 m

trees 48%

16 km

3,150 m

trees 48%

80 km

4,625 m

trees 42%

treesgrasslandcroplandartificial surfacesbare terrainsnow and icewatermoss and lichen

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

May weather nearby: Chamonix 40 km · Martigny-Ville 45 km · Zermatt 46 km · Ivrea 53 km · Sitten 55 km · Sallanches 58 km · Ciriè 60 km · Biella 61 km

Italy travel facts

Travel advisory: Level 2; Exercise Increased Caution
Power plugs: Type C / F / L; 230 V · 50 Hz
Prices: ≈ 69% of US; price level, 2025
GDP per capita: $43,309; 2025
Happiness: 6.6 / 10; World Happiness, 2025
Safe drinking water: 97%; of population, 2024
Homicide rate: 0.6; per 100k, 2023
Road deaths: 5.3; per 100k/yr, 2019
Income group: High; World Bank
English: Moderate; EF EPI 513
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 Aosta (45.7376°, 7.3172°, elevation 583 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	5	-1
2	6	-1
3	6	-1
4	6	-1
5	6	-1
6	6	-1
7	6	-1
8	7	-1
9	7	-1
10	7	-1
11	7	0
12	7	0
13	7	0
14	7	0
15	8	0
16	8	0
17	8	0
18	8	0
19	8	0
20	9	1
21	9	1
22	9	1
23	9	1
24	9	1
25	10	1
26	10	1
27	10	2
28	10	2
29	10	2
30	11	2
31	11	2

	Clearer (%)	Cloudier (%)
1	34	66
2	34	66
3	34	66
4	34	66
5	34	66
6	34	66
7	35	65
8	35	65
9	35	65
10	36	64
11	36	64
12	36	64
13	36	64
14	37	63
15	38	62
16	39	61
17	39	61
18	41	59
19	41	59
20	41	59
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	41	59
30	41	59
31	40	60

	Rain chance (%)	Snow chance (%)
1	52	41
2	53	41
3	53	40
4	53	39
5	54	38
6	54	37
7	53	35
8	53	34
9	53	33
10	53	32
11	53	31
12	52	30
13	52	29
14	52	28
15	52	28
16	52	27
17	52	26
18	52	25
19	52	24
20	51	23
21	51	22
22	52	21
23	52	20
24	52	19
25	53	18
26	54	17
27	54	16
28	55	16
29	56	15
30	57	14
31	58	14

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

	Clearer (%)	Cloudier (%)
1	34	66
2	34	66
3	34	66
4	34	66
5	34	66
6	34	66
7	35	65
8	35	65
9	35	65
10	36	64
11	36	64
12	36	64
13	36	64
14	37	63
15	38	62
16	39	61
17	39	61
18	41	59
19	41	59
20	41	59
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	41	59
30	41	59
31	40	60

	Rain chance (%)	Snow chance (%)
1	52	41
2	53	41
3	53	40
4	53	39
5	54	38
6	54	37
7	53	35
8	53	34
9	53	33
10	53	32
11	53	31
12	52	30
13	52	29
14	52	28
15	52	28
16	52	27
17	52	26
18	52	25
19	52	24
20	51	23
21	51	22
22	52	21
23	52	20
24	52	19
25	53	18
26	54	17
27	54	16
28	55	16
29	56	15
30	57	14
31	58	14

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

	Clearer (%)	Cloudier (%)
1	34	66
2	34	66
3	34	66
4	34	66
5	34	66
6	34	66
7	35	65
8	35	65
9	35	65
10	36	64
11	36	64
12	36	64
13	36	64
14	37	63
15	38	62
16	39	61
17	39	61
18	41	59
19	41	59
20	41	59
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	41	59
30	41	59
31	40	60

	Rain chance (%)	Snow chance (%)
1	52	41
2	53	41
3	53	40
4	53	39
5	54	38
6	54	37
7	53	35
8	53	34
9	53	33
10	53	32
11	53	31
12	52	30
13	52	29
14	52	28
15	52	28
16	52	27
17	52	26
18	52	25
19	52	24
20	51	23
21	51	22
22	52	21
23	52	20
24	52	19
25	53	18
26	54	17
27	54	16
28	55	16
29	56	15
30	57	14
31	58	14

	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