Formosa in Summer
In summer (December, January and February), Formosa sees average daytime highs around 32°C and overnight lows near 22°C, with 418 mm of rain over about 34 wet days across the season. It is the warmest season of the year and the 2nd-wettest season.
Across summer, daytime highs hold fairly steady around 32°C. The sky is clear or mostly clear about 44% of the time across summer, and the air most often feels oppressive.
Summer is Formosa's weakest season of the year to visit on our travel score. For the whole year in context, see Formosa's year-round climate.
- Avg daytime high
- 32°C
- warmest season of the year
- Avg overnight low
- 22°C
- Rainfall
- 418 mm
- 34 wet days
- Avg wind
- 12 km/h
- Travel score
- 3.8
- weakest season of the year
- Months
- Dec · Jan · Feb
Temperature in Formosa in Summer
Across summer, daytime highs hold fairly steady around 32°C.
A typical summer day in Formosa reaches about 32°C and drops to 22°C overnight. The warmest of the three months is January, the coolest December.
How summer really feels in Formosa
Once humidity and wind are folded in, summer brings about 90 days that feel above 32°C and 0 that feel at or below 0°C.
The story in summer is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Formosa weather by month
How the three summer months (December, January and February) 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 | 33° / 23° | 119 | 11.1 | 13.5 | 3.5 |
| Feb | 32° / 23° | 137 | 11.5 | 12.9 | 3.8 |
| Mar | 31° / 21° | 128 | 10.9 | 12.2 | 4.7 |
| Apr | 28° / 18° | 153 | 9.5 | 11.4 | 6.3 |
| May | 24° / 15° | 128 | 8.4 | 10.7 | 7.2 |
| Jun | 22° / 14° | 99 | 8.4 | 10.4 | 7.0 |
| Jul | 22° / 12° | 78 | 7.5 | 10.5 | 7.3 |
| Aug | 24° / 14° | 64 | 6.6 | 11.1 | 7.8 |
| Sep | 26° / 16° | 111 | 8.6 | 11.8 | 7.1 |
| Oct | 29° / 18° | 184 | 11.5 | 12.6 | 5.7 |
| Nov | 30° / 20° | 182 | 10.6 | 13.3 | 5.0 |
| Dec | 32° / 22° | 162 | 11.4 | 13.6 | 4.0 |
Cloud cover in Summer
The sky is clear or mostly clear about 44% of the time across summer.
Chance of precipitation in Summer
Formosa gets around 418 mm of rain over 34 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 12 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 13 h 30 min in early December to 12 h 36 min by late February. The lit band spans sunrise to sunset each day.
Solar energy in Summer
Average shortwave solar energy reaching the ground each day across summer, about 6.5 kWh/m².
Is summer a good time to visit Formosa?
Our two travel scores rate summer for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
summer is a weaker month for outdoor sightseeing in Formosa. The water and warmth also suit a beach or pool day.
What to pack for Formosa in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Formosa sees daytime highs around 32°C and nights near 22°C. Pack light clothes and sun protection. Worth having: rain gear. About 34 days see rain.
UV index in Formosa in Summer
Clear-sky midday UV across summer averages around 14 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Formosa peaks around January 18 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 21 at about 4 (moderate).
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 | 14 | 11 | 8 | 6 | 4 | 5 | 5 | 8 | 7 | 12 | 13 |
| Level | Extreme | Extreme | Extreme | Very high | High | Moderate | Moderate | Moderate | Very high | Very high | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 15 | Extreme |
| Feb | 14 | Extreme |
| Mar | 11 | Extreme |
| Apr | 8 | Very high |
| May | 6 | High |
| Jun | 4 | Moderate |
| Jul | 5 | Moderate |
| Aug | 5 | Moderate |
| Sep | 8 | Very high |
| Oct | 7 | Very high |
| Nov | 12 | Extreme |
| Dec | 13 | Extreme |
Air quality in Formosa in Summer
Average fine-particle pollution (PM2.5) through the year — so you can see where summer falls, not just the annual average.
Air quality in Formosa is worst in September — around 23 µg/m³ PM2.5 (moderate), about 2.9× the cleanest month (May, 8 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) | 16 | 13 | 13 | 10 | 8 | 9 | 12 | 21 | 23 | 15 | 10 | 9 |
| Level | Moderate | Moderate | Moderate | Good | Good | Good | Good | Moderate | Moderate | Moderate | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 16 | Moderate |
| Feb | 13 | Moderate |
| Mar | 13 | Moderate |
| Apr | 10 | Good |
| May | 8 | Good |
| Jun | 9 | Good |
| Jul | 12 | Good |
| Aug | 21 | Moderate |
| Sep | 23 | Moderate |
| Oct | 15 | Moderate |
| Nov | 10 | Good |
| Dec | 9 | Good |
Where is Formosa?
Formosa sits at 26.2°S, 58.2°W, 67 m above sea level, in Argentina. The nearest listed city is Pilar, 76 km away.
Topography around Formosa
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Formosa.
Within 3 km, the terrain around Formosa has only modest variations in elevation — a maximum elevation change of 17 m around an average of 58 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 23 m; within 80 km, only modest variations in elevation — a maximum elevation change of 182 m.
The land around Formosa is covered by artificial surfaces (50%) and trees (29%) within 3 km, trees (44%) and grassland (39%) within 16 km, and grassland (49%) and trees (36%) within 80 km.
Argentina travel facts
- Travel advisory
- Level 1
- Exercise Normal Precautions
- Power plugs
- Type C / I
- 220 V · 50 Hz
- Prices
- ≈ 46% of US
- price level, 2025
- GDP per capita
- $14,898
- 2025
- Happiness
- 6.4 / 10
- World Happiness, 2025
- Homicide rate
- 4.5
- per 100k, 2023
- Road deaths
- 14.1
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- English
- High
- EF EPI 575
- 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 Formosa (-26.1849°, -58.1731°, elevation 67 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.