Custoias in Fall
In fall (September, October and November), Custoias sees average daytime highs around 19°C and overnight lows near 10°C, with 186 mm of rain over about 23 wet days across the season. It is the 2nd-warmest season and the wettest season of the year.
Over the season highs ease from about 27°C in early September to 12°C by late November. The sky is clear or mostly clear about 37% of the time across fall, and the air most often feels dry.
Fall is Custoias's 2nd-best season to visit on our travel score. For the whole year in context, see Custoias's year-round climate.
- Avg daytime high
- 19°C
- 2nd-warmest season
- Avg overnight low
- 10°C
- Rainfall
- 186 mm
- 23 wet days
- Avg wind
- 8 km/h
- Travel score
- 6.0
- 2nd-best season
- Months
- Sep · Oct · Nov
Temperature in Custoias in Fall
Over the season highs ease from about 27°C in early September to 12°C by late November.
A typical fall day in Custoias reaches about 19°C and drops to 10°C overnight. The warmest of the three months is September, the coolest November.
Custoias weather by month
How the three fall 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 | 10° / 3° | 62 | 8.7 | 9.4 | 2.3 |
| Feb | 12° / 3° | 43 | 6.6 | 10.4 | 3.5 |
| Mar | 15° / 5° | 49 | 7.9 | 11.7 | 4.9 |
| Apr | 17° / 7° | 54 | 9.8 | 13.1 | 5.6 |
| May | 21° / 10° | 49 | 9.2 | 14.3 | 6.7 |
| Jun | 26° / 13° | 20 | 4.8 | 14.9 | 7.8 |
| Jul | 29° / 15° | 12 | 2.6 | 14.7 | 7.1 |
| Aug | 29° / 15° | 13 | 3.4 | 13.6 | 7.1 |
| Sep | 25° / 13° | 34 | 4.6 | 12.3 | 7.9 |
| Oct | 19° / 10° | 83 | 9.3 | 10.9 | 6.3 |
| Nov | 13° / 6° | 69 | 9.2 | 9.7 | 3.9 |
| Dec | 10° / 4° | 68 | 8.3 | 9.1 | 2.5 |
Cloud cover in Fall
The sky is clear or mostly clear about 37% of the time across fall.
Chance of precipitation in Fall
Custoias gets around 186 mm of rain over 23 wet days across fall. The line is the day-by-day chance of measurable precipitation.
Humidity in Fall
Most of fall feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Fall
Winds average 8 km/h across fall.
Sunrise & sunset in Fall
Daylight runs from about 13 hours in early September to 9 h 18 min by late November. The lit band spans sunrise to sunset each day.
Solar energy in Fall
Average shortwave solar energy reaching the ground each day across fall, about 3.4 kWh/m².
Is fall a good time to visit Custoias?
Our two travel scores rate fall for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
fall is a reasonable time to visit Custoias for sightseeing.
What to pack for Custoias in Fall
From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In fall, Custoias sees daytime highs around 19°C and nights near 10°C. Worth packing: light clothes, a warm layer, rain gear and sun protection. About 23 days see rain.
UV index in Custoias in Fall
Clear-sky midday UV across fall averages around 4 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Custoias peaks around July 12 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 at about 2 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 2 | 3 | 5 | 6 | 7 | 9 | 9 | 9 | 6 | 5 | 2 | 2 |
| Level | Low | Moderate | High | High | High | Very high | Very high | Very high | High | Moderate | Moderate | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 2 | Low |
| Feb | 3 | Moderate |
| Mar | 5 | High |
| Apr | 6 | High |
| May | 7 | High |
| Jun | 9 | Very high |
| Jul | 9 | Very high |
| Aug | 9 | Very high |
| Sep | 6 | High |
| Oct | 5 | Moderate |
| Nov | 2 | Moderate |
| Dec | 2 | Low |
Air quality in Custoias in Fall
Average fine-particle pollution (PM2.5) through the year — so you can see where fall falls, not just the annual average.
Air quality in Custoias is worst in August — around 22 µg/m³ PM2.5 (moderate), about 3.2× the cleanest month (November, 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) | 10 | 10 | 13 | 11 | 8 | 9 | 12 | 22 | 18 | 13 | 7 | 7 |
| Level | Good | Good | Moderate | Good | Good | Good | Good | Moderate | Moderate | Moderate | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 10 | Good |
| Feb | 10 | Good |
| Mar | 13 | Moderate |
| Apr | 11 | Good |
| May | 8 | Good |
| Jun | 9 | Good |
| Jul | 12 | Good |
| Aug | 22 | Moderate |
| Sep | 18 | Moderate |
| Oct | 13 | Moderate |
| Nov | 7 | Good |
| Dec | 7 | Good |
Where is Custoias?
Custoias sits at 41.1°N, 7.3°W, 569 m above sea level, in Portugal. The nearest listed city is Vila Nova de Foz Côa, 15 km away.
Topography around Custoias
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Custoias.
Within 3 km, the terrain around Custoias has large variations in elevation — a maximum elevation change of 671 m around an average of 479 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 921 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,573 m.
The land around Custoias is covered by shrubs (40%), grassland (30%) and trees (29%) within 3 km, grassland (44%), trees (26%) and shrubs (23%) within 16 km, and grassland (58%) and trees (30%) within 80 km.
Portugal travel facts
- Travel advisory
- Level 1
- Exercise Normal Precautions
- Power plugs
- Type C / E / F
- 230 V · 50 Hz
- Prices
- ≈ 60% of US
- price level, 2025
- GDP per capita
- $32,082
- 2025
- Happiness
- 6.0 / 10
- World Happiness, 2025
- Safe drinking water
- 95%
- of population, 2024
- Homicide rate
- 0.7
- per 100k, 2022
- Road deaths
- 8.2
- per 100k/yr, 2019
- Income group
- High
- World Bank
- English
- Very high
- EF EPI 612
- 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 Custoias (41.1053°, -7.321°, elevation 569 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.