San Martin in Winter
In winter (June, July and August), San Martin sees average daytime highs around 27°C and overnight lows near 18°C, with 4 mm of rain over about 1 wet days across the season. It is the coldest season of the year and the driest season of the year.
Over the season highs ease from about 29°C in early June to 26°C by late August. The sky is clear or mostly clear about 62% of the time across winter, and the air most often feels humid.
Winter is San Martin's best season of the year to visit on our travel score. For the whole year in context, see San Martin's year-round climate.
- Avg daytime high
- 27°C
- coldest season of the year
- Avg overnight low
- 18°C
- Rainfall
- 4 mm
- 1 wet days
- Avg wind
- 13 km/h
- Travel score
- 8.4
- best season of the year
- Months
- Jun · Jul · Aug
Temperature in San Martin in Winter
Over the season highs ease from about 29°C in early June to 26°C by late August.
A typical winter day in San Martin reaches about 27°C and drops to 18°C overnight. The warmest of the three months is June, the coolest August.
How winter really feels in San Martin
Once humidity and wind are folded in, winter brings about 0 days that feel above 32°C and 0 that feel at or below 0°C.
winter sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
San Martin weather by month
How the three winter months (June, July and August) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 31° / 22° | 37 | 5.5 | 12.3 | 4.6 |
| Feb | 32° / 23° | 62 | 9.4 | 12.2 | 3.7 |
| Mar | 32° / 23° | 107 | 11.2 | 12 | 3.5 |
| Apr | 32° / 22° | 38 | 6.4 | 11.9 | 4.5 |
| May | 30° / 20° | 7 | 2.3 | 11.8 | 6.0 |
| Jun | 28° / 19° | 3 | 0.9 | 11.7 | 7.9 |
| Jul | 26° / 18° | 1 | 0.2 | 11.7 | 8.5 |
| Aug | 26° / 17° | 0 | 0.1 | 11.8 | 8.8 |
| Sep | 27° / 17° | 2 | 0.6 | 12 | 8.3 |
| Oct | 27° / 18° | 4 | 1.5 | 12.1 | 7.8 |
| Nov | 28° / 18° | 8 | 2.2 | 12.2 | 7.0 |
| Dec | 30° / 20° | 21 | 4.9 | 12.3 | 5.7 |
Cloud cover in Winter
The sky is clear or mostly clear about 62% of the time across winter.
Chance of precipitation in Winter
San Martin gets around 4 mm of rain over 1 wet days across winter. The line is the day-by-day chance of measurable precipitation.
Humidity in Winter
Most of winter feels humid — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Winter
Winds average 13 km/h across winter.
Sunrise & sunset in Winter
Daylight runs from about 11 h 42 min in early June to 11 h 54 min by late August. The lit band spans sunrise to sunset each day.
Solar energy in Winter
Average shortwave solar energy reaching the ground each day across winter, about 5.7 kWh/m².
Is winter a good time to visit San Martin?
Our two travel scores rate winter for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
winter is one of the better times to visit San Martin for general sightseeing. The water and warmth also suit a beach or pool day.
What to pack for San Martin in Winter
From winter's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In winter, San Martin sees daytime highs around 27°C and nights near 18°C. Pack light clothes and sun protection.
Sea temperature near San Martin in Winter
The nearest coast averages about 18°C across winter — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 54 km away) is warmest in February at about 23°C and coldest in September near 18°C.
It's comfortable for a long swim from Dec 25 to May 15 — about 4.7 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 21 | 23 | 23 | 21 | 20 | 19 | 18 | 18 | 18 | 18 | 19 | 20 |
| Comfort | Refreshing | Refreshing | Refreshing | Refreshing | Refreshing | Cool | Cool | Cool | Cool | Cool | Cool | Cool |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 21 | Refreshing |
| Feb | 23 | Refreshing |
| Mar | 23 | Refreshing |
| Apr | 21 | Refreshing |
| May | 20 | Refreshing |
| Jun | 19 | Cool |
| Jul | 18 | Cool |
| Aug | 18 | Cool |
| Sep | 18 | Cool |
| Oct | 18 | Cool |
| Nov | 19 | Cool |
| Dec | 20 | Cool |
UV index in San Martin in Winter
Clear-sky midday UV across winter averages 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 San Martin peaks around February 19 at about 16 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 22 at about 10 (extreme).
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 | 16 | 13 | 12 | 10 | 10 | 11 | 12 | 14 | 13 | 13 |
| Level | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 15 | Extreme |
| Feb | 16 | Extreme |
| Mar | 16 | Extreme |
| Apr | 13 | Extreme |
| May | 12 | Extreme |
| Jun | 10 | Very high |
| Jul | 10 | Extreme |
| Aug | 11 | Extreme |
| Sep | 12 | Extreme |
| Oct | 14 | Extreme |
| Nov | 13 | Extreme |
| Dec | 13 | Extreme |
Where is San Martin?
San Martin sits at 5.2°S, 80.7°W, 35 m above sea level, in Peru. The nearest listed city is Piura, 1.0 km away.
Topography around San Martin
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of San Martin.
Within 3 km, the terrain around San Martin has only modest variations in elevation — a maximum elevation change of 26 m around an average of 35 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 127 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,178 m.
The land around San Martin is covered by artificial surfaces (57%) and bare terrain (25%) within 3 km, bare terrain (58%) within 16 km, and bare terrain (36%) and shrubs (26%) within 80 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 San Martin (-5.1859°, -80.6693°, elevation 35 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.