Formosa in Spring
In spring (September, October and November), Formosa sees average daytime highs around 30°C and overnight lows near 20°C, with 344 mm of rain over about 36 wet days across the season. It is the warmest season of the year and the 2nd-wettest season.
Over the season highs ease from about 31°C in early September to 28°C by late November. The sky is clear or mostly clear about 34% of the time across spring, and the air most often feels muggy.
Spring is Formosa's 3rd-best season to visit on our travel score. For the whole year in context, see Formosa's year-round climate.
- Avg daytime high
- 30°C
- warmest season of the year
- Avg overnight low
- 20°C
- Rainfall
- 344 mm
- 36 wet days
- Avg wind
- 7 km/h
- Travel score
- 4.6
- 3rd-best season
- Months
- Sep · Oct · Nov
Temperature in Formosa in Spring
Over the season highs ease from about 31°C in early September to 28°C by late November.
A typical spring day in Formosa reaches about 30°C and drops to 20°C overnight. The warmest of the three months is September, the coolest September.
Formosa weather by month
How the three spring months (September, October and November) 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 | 28° / 20° | 202 | 18.6 | 12.8 | 4.5 |
| Feb | 29° / 20° | 159 | 16.5 | 12.5 | 4.5 |
| Mar | 29° / 20° | 174 | 18.3 | 12.1 | 4.6 |
| Apr | 29° / 19° | 69 | 10 | 11.7 | 5.7 |
| May | 28° / 17° | 15 | 3 | 11.3 | 7.3 |
| Jun | 27° / 16° | 4 | 0.6 | 11.1 | 8.3 |
| Jul | 28° / 15° | 0 | 0 | 11.2 | 8.5 |
| Aug | 29° / 17° | 4 | 1.1 | 11.5 | 7.1 |
| Sep | 31° / 19° | 23 | 3.8 | 11.9 | 5.3 |
| Oct | 31° / 20° | 103 | 11.6 | 12.4 | 4.4 |
| Nov | 29° / 20° | 218 | 20.8 | 12.7 | 4.1 |
| Dec | 28° / 20° | 244 | 20.6 | 12.9 | 4.3 |
Cloud cover in Spring
The sky is clear or mostly clear about 34% of the time across spring.
Chance of precipitation in Spring
Formosa gets around 344 mm of rain over 36 wet days across spring. The line is the day-by-day chance of measurable precipitation.
Humidity in Spring
Most of spring feels muggy — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Spring
Winds average 7 km/h across spring.
Sunrise & sunset in Spring
Daylight runs from about 11 h 42 min in early September to 12 h 54 min by late November. The lit band spans sunrise to sunset each day.
Solar energy in Spring
Average shortwave solar energy reaching the ground each day across spring, about 6.0 kWh/m².
Hazard calendar for Formosa
In spring, Formosa overlaps its monsoon season. The full year is below, with each hazard's peak months called out.
Formosa's monsoon runs November–March, when most of the year's rain falls.
Is spring a good time to visit Formosa?
Our two travel scores rate spring for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
spring is a reasonable time to visit Formosa for sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Formosa in Spring
From spring's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In spring, Formosa sees daytime highs around 30°C and nights near 20°C. Pack light clothes, rain gear and sun protection. About 36 days see rain.
UV index in Formosa in Spring
Clear-sky midday UV across spring averages around 13 (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 February 15 at about 16 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 10 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 | 15 | 12 | 10 | 8 | 8 | 10 | 12 | 13 | 14 | 13 |
| Level | Extreme | Extreme | Extreme | Extreme | Very high | Very high | Very high | Very high | Extreme | Extreme | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 15 | Extreme |
| Feb | 16 | Extreme |
| Mar | 15 | Extreme |
| Apr | 12 | Extreme |
| May | 10 | Very high |
| Jun | 8 | Very high |
| Jul | 8 | Very high |
| Aug | 10 | Very high |
| Sep | 12 | Extreme |
| Oct | 13 | Extreme |
| Nov | 14 | Extreme |
| Dec | 13 | Extreme |
Air quality in Formosa in Spring
Average fine-particle pollution (PM2.5) through the year — so you can see where spring falls, not just the annual average.
Air quality in Formosa is worst in September — around 24 µg/m³ PM2.5 (moderate), about 3.5× the cleanest month (July, 7 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) | 8 | 9 | 10 | 10 | 9 | 8 | 7 | 10 | 24 | 17 | 9 | 9 |
| Level | Good | Good | Good | Good | Good | Good | Good | Good | Moderate | Moderate | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 8 | Good |
| Feb | 9 | Good |
| Mar | 10 | Good |
| Apr | 10 | Good |
| May | 9 | Good |
| Jun | 8 | Good |
| Jul | 7 | Good |
| Aug | 10 | Good |
| Sep | 24 | Moderate |
| Oct | 17 | Moderate |
| Nov | 9 | Good |
| Dec | 9 | Good |
Where is Formosa?
Formosa sits at 15.5°S, 47.3°W, 915 m above sea level, in Brazil. The nearest listed city is Planaltina, 31 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 176 m around an average of 917 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 610 m; within 80 km, large variations in elevation — a maximum elevation change of 848 m.
The land around Formosa is covered by artificial surfaces (47%) and grassland (25%) within 3 km, grassland (34%), trees (24%) and cropland (20%) within 16 km, and grassland (34%), trees (23%) and cropland (22%) within 80 km.
Brazil travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type C / N
- 127 / 220 V · 60 Hz
- Prices
- ≈ 46% of US
- price level, 2025
- GDP per capita
- $10,713
- 2025
- Happiness
- 6.6 / 10
- World Happiness, 2025
- Safe drinking water
- 89%
- of population, 2024
- Homicide rate
- 19.3
- per 100k, 2023
- Road deaths
- 16
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- English
- Low
- EF EPI 482
- 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 (-15.5372°, -47.3344°, elevation 915 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.