Castelo in Spring
In spring (September, October and November), Castelo sees average daytime highs around 26°C and overnight lows near 17°C, with 358 mm of rain over about 39 wet days across the season. It is the 3rd-warmest season and the 2nd-wettest season.
Across spring, daytime highs hold fairly steady around 26°C. The sky is clear or mostly clear about 21% of the time across spring, and the air most often feels humid.
Spring is Castelo's 2nd-best season to visit on our travel score. For the whole year in context, see Castelo's year-round climate.
- Avg daytime high
- 26°C
- 3rd-warmest season
- Avg overnight low
- 17°C
- Rainfall
- 358 mm
- 39 wet days
- Avg wind
- 7 km/h
- Travel score
- 6.1
- 2nd-best season
- Months
- Sep · Oct · Nov
Temperature in Castelo in Spring
Across spring, daytime highs hold fairly steady around 26°C.
A typical spring day in Castelo reaches about 26°C and drops to 17°C overnight. The warmest of the three months is October, the coolest September.
Castelo 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 | 29° / 20° | 148 | 14.1 | 13.1 | 4.9 |
| Feb | 29° / 20° | 107 | 11.9 | 12.7 | 4.8 |
| Mar | 28° / 19° | 159 | 16.6 | 12.1 | 5.0 |
| Apr | 27° / 18° | 88 | 13.4 | 11.5 | 6.0 |
| May | 25° / 16° | 43 | 8.6 | 11 | 7.1 |
| Jun | 24° / 14° | 23 | 5.5 | 10.8 | 7.8 |
| Jul | 24° / 14° | 24 | 6 | 10.9 | 7.8 |
| Aug | 24° / 14° | 26 | 6.5 | 11.3 | 7.7 |
| Sep | 26° / 16° | 58 | 9.3 | 11.9 | 6.9 |
| Oct | 26° / 17° | 110 | 12.3 | 12.5 | 6.1 |
| Nov | 26° / 18° | 191 | 17.1 | 13 | 5.2 |
| Dec | 28° / 19° | 224 | 19 | 13.2 | 4.8 |
Cloud cover in Spring
The sky is clear or mostly clear about 21% of the time across spring.
Chance of precipitation in Spring
Castelo gets around 358 mm of rain over 39 wet days across spring. The line is the day-by-day chance of measurable precipitation.
Humidity in Spring
Most of spring feels humid — 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 36 min in early September to 13 h 12 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 5.0 kWh/m².
Hazard calendar for Castelo
In spring, Castelo overlaps its rainy season season. The full year is below, with each hazard's peak months called out.
Castelo's rainy season runs October–March, when most of the year's rain falls.
Is spring a good time to visit Castelo?
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 Castelo for sightseeing.
What to pack for Castelo in Spring
From spring's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In spring, Castelo sees daytime highs around 26°C and nights near 17°C. Pack rain gear. Worth having: light clothes and sun protection. About 39 days see rain.
Sea temperature near Castelo in Spring
The nearest coast averages about 23°C across spring — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 66 km away) is warmest in March at about 25°C and coldest in September near 22°C.
The water stays above 20°C all year — warm enough for a swim any month.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 24 | 25 | 25 | 25 | 25 | 23 | 23 | 23 | 22 | 23 | 24 | 24 |
| Comfort | Warm | Warm | Warm | Warm | Warm | Refreshing | Refreshing | Refreshing | Refreshing | Refreshing | Refreshing | Warm |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 24 | Warm |
| Feb | 25 | Warm |
| Mar | 25 | Warm |
| Apr | 25 | Warm |
| May | 25 | Warm |
| Jun | 23 | Refreshing |
| Jul | 23 | Refreshing |
| Aug | 23 | Refreshing |
| Sep | 22 | Refreshing |
| Oct | 23 | Refreshing |
| Nov | 24 | Refreshing |
| Dec | 24 | Warm |
UV index in Castelo in Spring
Clear-sky midday UV across spring averages around 12 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Castelo peaks around February 11 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 20 at about 6 (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) | 14 | 15 | 13 | 10 | 7 | 6 | 7 | 9 | 10 | 12 | 13 | 14 |
| Level | Extreme | Extreme | Extreme | Very high | Very high | High | High | Very high | Very high | Extreme | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 14 | Extreme |
| Feb | 15 | Extreme |
| Mar | 13 | Extreme |
| Apr | 10 | Very high |
| May | 7 | Very high |
| Jun | 6 | High |
| Jul | 7 | High |
| Aug | 9 | Very high |
| Sep | 10 | Very high |
| Oct | 12 | Extreme |
| Nov | 13 | Extreme |
| Dec | 14 | Extreme |
Where is Castelo?
Castelo sits at 20.6°S, 41.2°W, 129 m above sea level, in Brazil. The nearest listed city is Vargem Alta, 20 km away.
Topography around Castelo
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Castelo.
Within 3 km, the terrain around Castelo has large variations in elevation — a maximum elevation change of 768 m around an average of 224 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,935 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,841 m.
The land around Castelo is covered by trees (56%) and grassland (37%) within 3 km, trees (53%) and grassland (46%) within 16 km, and trees (50%) and grassland (41%) 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 Castelo (-20.6036°, -41.1847°, elevation 129 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.