Imperial weather in May

In May, Imperial sees average daytime highs of 23°C and overnight lows near 16°C, with 1 mm of rain across 0.4 wet days and about 11.4 hours of daylight. It is the 6th-warmest and 8th-wettest month of the year here.

Day-to-day highs hold fairly steady near 23°C through the month. The sky is clear or mostly clear about 68% of the time in May, and the air most often feels comfortable.

Daylight stretches from about 11 h 30 min at the start of May to 11 h 18 min by month's end. Set against the rest of the year, May is Imperial's 5th-clearest and 8th-windiest month. For the whole year in context, see Imperial's year-round climate.

Daytime high: 23°; 6th warmest
Overnight low: 16°; 7th coldest
Rainfall: 1 mm; 0.4 wet days
Daylight: 11 h 24 min; 6:20 AM – 5:44 PM
Cloud cover: 31%; 5th clearest
Wind: 5 km/h; 8th windiest
Solar energy: 5.59 kWh/m²
Travel score: 8.8; out of 10

Imperial is city in Lima, Peru.

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

← April Imperial 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

Day-to-day highs hold fairly steady near 23°C through the month.

A typical May day in Imperial reaches about 23°C in the afternoon and slips back to 16°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 21°C and 24°C. Set against its neighbours, May runs about 1°C cooler than April and about 1°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)	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	22	22	22	22	22	22	22	22	22	22	22	22	22
Avg low (°C)	17	17	17	17	17	17	17	17	17	17	17	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16

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

Imperial weather by month

How May compares with the rest of the year at a glance. May is the 6th-warmest and 8th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	24° / 18°	27	8.2	12.7	6.7
Feb	24° / 19°	44	11.7	12.4	6.0
Mar	24° / 19°	26	7.5	12.1	6.8
Apr	24° / 18°	4	1.4	11.7	8.2
May	23° / 16°	1	0.4	11.4	8.8
Jun	21° / 16°	0	0.1	11.2	8.7
Jul	21° / 15°	1	0.1	11.3	8.7
Aug	21° / 15°	0	0	11.6	8.7
Sep	21° / 15°	0	0.1	11.9	8.6
Oct	22° / 15°	3	0.8	12.3	8.2
Nov	23° / 16°	2	0.4	12.6	8.1
Dec	23° / 17°	7	2.1	12.8	7.7

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 68% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 15% of May, with mostly cloudy or overcast conditions the remaining 17%. Skies tend to open up 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 (%)	78	79	80	82	83	83	84	84	84	84	84	84	84	84	83	83	83	83	83	83	83	83	82	82	83	83	83	83	83	83	83
Cloudier (%)	22	21	20	18	17	17	16	16	16	16	16	16	16	16	17	17	17	17	17	17	17	17	18	18	17	17	17	17	17	17	17

	Clearer (%)	Cloudier (%)
1	78	22
2	79	21
3	80	20
4	82	18
5	83	17
6	83	17
7	84	16
8	84	16
9	84	16
10	84	16
11	84	16
12	84	16
13	84	16
14	84	16
15	83	17
16	83	17
17	83	17
18	83	17
19	83	17
20	83	17
21	83	17
22	83	17
23	82	18
24	82	18
25	83	17
26	83	17
27	83	17
28	83	17
29	83	17
30	83	17
31	83	17

Chance of precipitation in May

Any precipitation

Imperial gets around 1 mm of rain over 0.4 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 1% and peaks near 3% 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 (%)	3	3	3	3	2	2	2	2	2	2	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1

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

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the comfortable band about 66% 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 (%)	3	4	4	5	6	7	8	9	10	11	13	14	16	17	19	20	22	24	26	27	29	32	34	36	38	39	41	43	44	46	47
Comfortable (%)	67	68	69	70	70	71	71	72	72	73	72	72	72	72	71	72	71	70	69	69	67	65	63	61	59	59	57	55	54	52	52
Humid (%)	30	28	27	25	24	22	21	19	18	16	15	14	12	11	10	8	7	6	5	4	4	3	3	3	3	2	2	2	2	2	1

	Dry (%)	Comfortable (%)	Humid (%)
1	3	67	30
2	4	68	28
3	4	69	27
4	5	70	25
5	6	70	24
6	7	71	22
7	8	71	21
8	9	72	19
9	10	72	18
10	11	73	16
11	13	72	15
12	14	72	14
13	16	72	12
14	17	72	11
15	19	71	10
16	20	72	8
17	22	71	7
18	24	70	6
19	26	69	5
20	27	69	4
21	29	67	4
22	32	65	3
23	34	63	3
24	36	61	3
25	38	59	3
26	39	59	2
27	41	57	2
28	43	55	2
29	44	54	2
30	46	52	2
31	47	52	1

Wind in May

Winds average 5 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)	5	5	5	5	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
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	5	calm
2	5	calm
3	5	calm
4	5	calm
5	5	calm
6	5	calm
7	5	calm
8	5	calm
9	5	calm
10	5	calm
11	5	calm
12	5	calm
13	5	calm
14	5	calm
15	5	calm
16	5	calm
17	5	calm
18	5	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 11 h 30 min at the start of May to 11 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 12 minutes over May. Sunrise moves from 6:16 AM to 6:24 AM, and sunset from 5:49 PM to 5:42 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)	11.5	11.5	11.5	11.5	11.5	11.5	11.5	11.5	11.5	11.5	11.4	11.4	11.4	11.4	11.4	11.4	11.4	11.4	11.4	11.4	11.4	11.4	11.3	11.3	11.3	11.3	11.3	11.3	11.3	11.3	11.3
Sunrise (AM)	6:16	6:17	6:17	6:17	6:17	6:17	6:18	6:18	6:18	6:18	6:18	6:19	6:19	6:19	6:19	6:20	6:20	6:20	6:20	6:21	6:21	6:21	6:22	6:22	6:22	6:22	6:23	6:23	6:23	6:24	6:24
Sunset (PM)	5:49	5:48	5:48	5:48	5:47	5:47	5:46	5:46	5:46	5:45	5:45	5:45	5:44	5:44	5:44	5:44	5:43	5:43	5:43	5:43	5:43	5:42	5:42	5:42	5:42	5:42	5:42	5:42	5:42	5:42	5:42

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	11.5	6:16	5:49
2	11.5	6:17	5:48
3	11.5	6:17	5:48
4	11.5	6:17	5:48
5	11.5	6:17	5:47
6	11.5	6:17	5:47
7	11.5	6:18	5:46
8	11.5	6:18	5:46
9	11.5	6:18	5:46
10	11.5	6:18	5:45
11	11.4	6:18	5:45
12	11.4	6:19	5:45
13	11.4	6:19	5:44
14	11.4	6:19	5:44
15	11.4	6:19	5:44
16	11.4	6:20	5:44
17	11.4	6:20	5:43
18	11.4	6:20	5:43
19	11.4	6:20	5:43
20	11.4	6:21	5:43
21	11.4	6:21	5:43
22	11.4	6:21	5:42
23	11.3	6:22	5:42
24	11.3	6:22	5:42
25	11.3	6:22	5:42
26	11.3	6:22	5:42
27	11.3	6:23	5:42
28	11.3	6:23	5:42
29	11.3	6:23	5:42
30	11.3	6:24	5:42
31	11.3	6:24	5:42

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.59 kWh/m².

For context, solar energy here swings from a low near 5.28 kWh/m² to a high of 7.33 kWh/m² in November across the year — May's 5.59 kWh/m² falls in the middle.

	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	5.7	5.7	5.7	5.7	5.7	5.7	5.7	5.7	5.7	5.6	5.6	5.6	5.6	5.6	5.6	5.6	5.6	5.6	5.5	5.5	5.5	5.5	5.5	5.5	5.5	5.5	5.5	5.4	5.4	5.4
Level	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright

	Solar energy (kWh/m²)	Level
1	5.7	Bright
2	5.7	Bright
3	5.7	Bright
4	5.7	Bright
5	5.7	Bright
6	5.7	Bright
7	5.7	Bright
8	5.7	Bright
9	5.7	Bright
10	5.7	Bright
11	5.6	Bright
12	5.6	Bright
13	5.6	Bright
14	5.6	Bright
15	5.6	Bright
16	5.6	Bright
17	5.6	Bright
18	5.6	Bright
19	5.6	Bright
20	5.5	Bright
21	5.5	Bright
22	5.5	Bright
23	5.5	Bright
24	5.5	Bright
25	5.5	Bright
26	5.5	Bright
27	5.5	Bright
28	5.5	Bright
29	5.4	Bright
30	5.4	Bright
31	5.4	Bright

Planning a trip in May

Is May a good time to visit Imperial?

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

8.8

Sightseeing

1st-best month of the year

6.5

Beach & pool

2nd-best month of the year

May is one of the better times to visit Imperial for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Imperial in May

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

In May, Imperial sees daytime highs around 23°C and nights near 16°C. Worth packing: light clothes and sun protection.

light clothessun protection

Sea temperature near Imperial in May

The nearest coast averages about 19°C in May — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in February at about 21°C and coldest in September near 17°C.

It's comfortable for a long swim from Jan 1 to Apr 21 — about 3.6 months when the water holds above 20°C.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Sea temperature (°C)	21	21	21	20	19	18	18	17	17	17	18	19
Comfort	Refreshing	Refreshing	Refreshing	Refreshing	Cool	Cool	Cool	Cool	Cool	Cool	Cool	Cool

	Sea temperature (°C)	Comfort
Jan	21	Refreshing
Feb	21	Refreshing
Mar	21	Refreshing
Apr	20	Refreshing
May	19	Cool
Jun	18	Cool
Jul	18	Cool
Aug	17	Cool
Sep	17	Cool
Oct	17	Cool
Nov	18	Cool
Dec	19	Cool

UV index in Imperial in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Imperial peaks around February 12 at about 16 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 22 at about 8 (very high).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	15	16	13	12	10	8	8	10	11	13	13	14
Level	Extreme	Extreme	Extreme	Extreme	Very high	Very high	Very high	Extreme	Extreme	Extreme	Extreme	Extreme

	UV index (midday)	Level
Jan	15	Extreme
Feb	16	Extreme
Mar	13	Extreme
Apr	12	Extreme
May	10	Very high
Jun	8	Very high
Jul	8	Very high
Aug	10	Extreme
Sep	11	Extreme
Oct	13	Extreme
Nov	13	Extreme
Dec	14	Extreme

Location & terrain

Where is Imperial?

Imperial sits at 13.1°S, 76.4°W, 91 m above sea level, in Peru. The nearest listed city is San Vicente de Cañete, 4.0 km away.

Topography around Imperial

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

Within 3 km, the terrain around Imperial has only modest variations in elevation — a maximum elevation change of 168 m around an average of 98 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,426 m; within 80 km, extreme variations in elevation — a maximum elevation change of 5,195 m.

The land around Imperial is covered by cropland (42%) and bare terrain (22%) within 3 km, bare terrain (48%) within 16 km, and bare terrain (38%) and water (32%) within 80 km.

3 km

168 m

cropland 42%

16 km

1,426 m

bare terrain 48%

80 km

5,195 m

bare terrain 38%

treesshrubsgrasslandcroplandartificial surfacesbare terrainwater

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

May weather nearby: San Vicente de Cañete 4.0 km · Nuevo Imperial 4.0 km · Chincha Alta 46 km · Mala 54 km · San Clemente 71 km · Pisco 74 km · Paracas 90 km · Villa Poeta José Gálvez Barrenechea 112 km

Peru travel facts

Travel advisory: Level 2; Exercise Increased Caution
Power plugs: Type A / B / C; 220 V · 60 Hz
Prices: ≈ 51% of US; price level, 2025
GDP per capita: $9,684; 2025
Happiness: 6.0 / 10; World Happiness, 2025
Safe drinking water: 49%; of population, 2024
Homicide rate: 8.6; per 100k, 2021
Road deaths: 13.6; per 100k/yr, 2019
Income group: Upper middle; World Bank
English: Moderate; EF EPI 519
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 Imperial (-13.0593°, -76.3527°, elevation 91 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).

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

	Clearer (%)	Cloudier (%)
1	78	22
2	79	21
3	80	20
4	82	18
5	83	17
6	83	17
7	84	16
8	84	16
9	84	16
10	84	16
11	84	16
12	84	16
13	84	16
14	84	16
15	83	17
16	83	17
17	83	17
18	83	17
19	83	17
20	83	17
21	83	17
22	83	17
23	82	18
24	82	18
25	83	17
26	83	17
27	83	17
28	83	17
29	83	17
30	83	17
31	83	17

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

	Dry (%)	Comfortable (%)	Humid (%)
1	3	67	30
2	4	68	28
3	4	69	27
4	5	70	25
5	6	70	24
6	7	71	22
7	8	71	21
8	9	72	19
9	10	72	18
10	11	73	16
11	13	72	15
12	14	72	14
13	16	72	12
14	17	72	11
15	19	71	10
16	20	72	8
17	22	71	7
18	24	70	6
19	26	69	5
20	27	69	4
21	29	67	4
22	32	65	3
23	34	63	3
24	36	61	3
25	38	59	3
26	39	59	2
27	41	57	2
28	43	55	2
29	44	54	2
30	46	52	2
31	47	52	1

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

	Clearer (%)	Cloudier (%)
1	78	22
2	79	21
3	80	20
4	82	18
5	83	17
6	83	17
7	84	16
8	84	16
9	84	16
10	84	16
11	84	16
12	84	16
13	84	16
14	84	16
15	83	17
16	83	17
17	83	17
18	83	17
19	83	17
20	83	17
21	83	17
22	83	17
23	82	18
24	82	18
25	83	17
26	83	17
27	83	17
28	83	17
29	83	17
30	83	17
31	83	17

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

	Dry (%)	Comfortable (%)	Humid (%)
1	3	67	30
2	4	68	28
3	4	69	27
4	5	70	25
5	6	70	24
6	7	71	22
7	8	71	21
8	9	72	19
9	10	72	18
10	11	73	16
11	13	72	15
12	14	72	14
13	16	72	12
14	17	72	11
15	19	71	10
16	20	72	8
17	22	71	7
18	24	70	6
19	26	69	5
20	27	69	4
21	29	67	4
22	32	65	3
23	34	63	3
24	36	61	3
25	38	59	3
26	39	59	2
27	41	57	2
28	43	55	2
29	44	54	2
30	46	52	2
31	47	52	1

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

	Clearer (%)	Cloudier (%)
1	78	22
2	79	21
3	80	20
4	82	18
5	83	17
6	83	17
7	84	16
8	84	16
9	84	16
10	84	16
11	84	16
12	84	16
13	84	16
14	84	16
15	83	17
16	83	17
17	83	17
18	83	17
19	83	17
20	83	17
21	83	17
22	83	17
23	82	18
24	82	18
25	83	17
26	83	17
27	83	17
28	83	17
29	83	17
30	83	17
31	83	17

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

	Dry (%)	Comfortable (%)	Humid (%)
1	3	67	30
2	4	68	28
3	4	69	27
4	5	70	25
5	6	70	24
6	7	71	22
7	8	71	21
8	9	72	19
9	10	72	18
10	11	73	16
11	13	72	15
12	14	72	14
13	16	72	12
14	17	72	11
15	19	71	10
16	20	72	8
17	22	71	7
18	24	70	6
19	26	69	5
20	27	69	4
21	29	67	4
22	32	65	3
23	34	63	3
24	36	61	3
25	38	59	3
26	39	59	2
27	41	57	2
28	43	55	2
29	44	54	2
30	46	52	2
31	47	52	1