Vila Franca de Xira, Portugal Climate
The warmest month is August, with an average high of 28°C; the coldest is January, with an average low of 9°C. A normal year brings 779 mm of precipitation.
Temperature through the year
The normal daily high and low and the record for every date at Lisboa Geofisica, since 1900. The line marks today.
- Normal low
- Normal high
- Record high
- Record low
Normals for Sep 27
- Normal high
- 26°C
- Normal low
- 17°C
- Record high
- 34°Cin 1963
- Record low
- 12°Cin 1942
- Chance of a wet day
- 21%
- Daylight
- 11 h 57 min
Month by month
Averages for 1991-2020. Wet days have at least 1 mm of precipitation in the reanalysis. Each month links to its own page.
| Month | Avg high | Avg low | Record high | Record low | Precipitation | Wet days |
|---|---|---|---|---|---|---|
| January | 15°C | 9°C | 23°C (1913) | 0°C (1938) | 106 mm | 9.3 |
| February | 16°C | 9°C | 25°C (1960) | -1°C (1954) | 73 mm | 8.5 |
| March | 19°C | 11°C | 28°C (1992) | 1°C (2005) | 73 mm | 9.3 |
| April | 20°C | 12°C | 32°C (1997) | 4°C (1911) | 68 mm | 9.0 |
| May | 23°C | 14°C | 35°C (1965) | 6°C (1947) | 57 mm | 6.2 |
| June | 26°C | 17°C | 42°C (1981) | 10°C (1902) | 13 mm | 3.0 |
| July | 28°C | 18°C | 41°C (1991) | 12°C (1956) | 2 mm | 0.0 |
| August | 28°C | 19°C | 42°C (2018) | 11°C (1918) | 7 mm | 3.1 |
| September | 26°C | 18°C | 38°C (2026) | 10°C (1956) | 37 mm | 6.0 |
| October | 23°C | 15°C | 34°C (1955) | 7°C (1935) | 112 mm | 9.3 |
| November | 18°C | 12°C | 28°C (1970) | 3°C (1901) | 124 mm | 12.0 |
| December | 15°C | 10°C | 23°C (1985) | 0°C (1926) | 108 mm | 9.3 |
| Year | 21°C | 14°C | 779 mm | 85 |
Precipitation
Rain and melted snow together. The chance of a wet day is the share of days with at least 1 mm of precipitation in the reanalysis.
779 mm in a normal year, most in November.
Chance of a wet day
- Chance of a wet day
Humidity and comfort
NASA POWER reanalysis, 1991-2020, for the grid cell around Vila Franca de Xira.
The muggiest month is August, when 1 percent of days are muggy or worse, with a mean dew point of 18°C or more.
| Month | Dew point | Humidity | Dry | Comfortable | Humid | Muggy | Oppressive | Miserable |
|---|---|---|---|---|---|---|---|---|
| January | 7°C | 83% | 95% | 5% | 0% | 0% | 0% | 0% |
| February | 7°C | 80% | 98% | 2% | 0% | 0% | 0% | 0% |
| March | 8°C | 75% | 97% | 3% | 0% | 0% | 0% | 0% |
| April | 9°C | 72% | 94% | 5% | 0% | 0% | 0% | 0% |
| May | 11°C | 68% | 76% | 22% | 2% | 0% | 0% | 0% |
| June | 13°C | 64% | 50% | 43% | 7% | 0% | 0% | 0% |
| July | 14°C | 61% | 29% | 59% | 12% | 0% | 0% | 0% |
| August | 14°C | 61% | 29% | 49% | 21% | 1% | 0% | 0% |
| September | 13°C | 66% | 39% | 42% | 19% | 0% | 0% | 0% |
| October | 12°C | 74% | 54% | 32% | 13% | 1% | 0% | 0% |
| November | 9°C | 81% | 80% | 16% | 4% | 0% | 0% | 0% |
| December | 8°C | 84% | 92% | 8% | 0% | 0% | 0% | 0% |
Comfort is judged by the day's mean dew point: dry below 13°C, comfortable to 16°C, humid to 18°C, muggy to 21°C, oppressive to 24°C, miserable above.
Clouds
Average share of the sky covered, from satellite (CERES and GEWEX SRB) by way of NASA POWER, 1991-2020.
The clearest month is August, with the sky 32 percent covered on average; the cloudiest is December, at 60 percent.
Wind
The mean wind speed over the whole day, from the MERRA-2 reanalysis by way of NASA POWER. Gusts run well above it.
The windiest month is July, averaging 16.9 km/h at 10 meters (33 feet) above the ground.
Daylight and sunshine
The longest day is Jun 19, with 14 h 55 min of daylight; the shortest is Dec 18, with 9 h 26 min.
- Day length
Solar energy
Average daily sunshine reaching the ground on a flat surface, in kilowatt-hours per square meter, clouds included.
Month pages
The weather in Vila Franca de Xira in each month, day by day.
What this means
A normal is the average of the thirty years 1991 to 2020, the period the World Meteorological Organization and NOAA use for comparison. It is an average, not a forecast: most days depart from it, and some by a long way.
A record is the highest or lowest value on the date in every year the station has reported, back to 1900. It rests on one station, so a neighbor a few miles away can hold different ones.
Cloud, humidity, wind and sunshine come from a reanalysis: a weather model run over the past with every observation fed in, averaged over a grid cell about 50 km across. It is consistent everywhere on Earth; it smooths local detail such as a lake shore or a valley.
More for this place
Nearby
Sources
Records: NOAA GHCN-Daily, station PO000008535, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.