Porto in January
In January, Porto has 133.3 mm (5.25 in) of rain, a daily high of 14.1 °C (57.4 °F) and a daily low of 6.4 °C (43.5 °F), as 1991-2020 model estimates; figures in brackets are converted. The daily high is a model estimate, adjusted against station records.
Last updated : first sourced version.
Best time to visit Porto: January misses our rule: days are 1.9 °C under our 16 °C and nights are 1.6 °C under our 8 °C (model estimates). Expect 10.7 rain days (model estimate) and days that grow by 46 min.
What January is like in Porto
- Each January, as is the custom, folk groups walk Porto's streets singing the traditional Janeiras. One year, a route ran down Rua das Flores. Source: Câmara Municipal do Porto (Porto city council), checked .
- On New Year's Day, by tradition, a free concert of classical music plays on Avenida dos Aliados. Source: Câmara Municipal do Porto (Porto city council), checked .
- Into early January, people skate on natural ice in Praça de D. João I. A second rink stands at the Boavista roundabout. Source: Câmara Municipal do Porto (Porto city council), checked .
Key figures
Weather in January, 1991-2020 model estimates
- Daily high
- 14.1 °C (57.4 °F)
- Daily low
- 6.4 °C (43.5 °F)
- Rain
- 133.3 mm (5.25 in) in the month
- Sunshine
- no data
Model estimate 1991-2020, not a weather station: ERA5-Land model estimates (Copernicus), computed by City by Month for the grid cell nearest the city. Daily high and Days with rain: model estimate, adjusted against station records. Licence: CC BY 4.0. Checked . How we make and test model estimates
Model estimate for the ERA5-Land grid cell at 41.1° N, 8.6° W, 6 km from the city centre point.
How we define and convert these figures
Notes. Sunshine: Not in our ERA5-Land estimates.
Daylight on 15 January 2026
- Sunrise
- 07:58 local time
- Sunset
- 17:30 local time
- Day length
- 9 h 33 min
Day length 1-31 January: 9 h 17 min to 10 h 03 min, +46 min.
Source: NOAA Solar Calculator equations, checked .
Month by month
Each month: daily high in °C, then rain in mm, 1991-2020 model estimates.
ERA5-Land model estimates 1991-2020, as above, checked .
This month against the year
| Measure | January | Rank |
|---|---|---|
| Daily high | 14.1 °C | coldest |
| Daily low | 6.4 °C | equal coldest |
| Rain | 133.3 mm | 4th wettest |
| Sunshine | no data | no data |
| Day length | 9 h 33 min | 2nd shortest |
Equal values share a rank. How we rank months
Porto in January, on average: 10.7 rain days (1 mm or more). Model estimate, adjusted against station records.
ERA5-Land model estimates 1991-2020, as above, checked .
Day length: NOAA solar equations, checked .
Public holidays this month
| Date | Holiday |
|---|---|
| Thursday | New Year's Day |
Typed from the official list and re-checked, .
January 2027: no data. No official page gives the 2027 Easter and Corpus Christi dates yet.
English names are from the holidays library where the official list gives none. How we check holidays
Source: Official public holiday list (dgaj.justica.gov.pt), checked ; holidays Python library, checked . Library: holidays 0.105.
Same month in 8 model-estimate cities
Porto is warmer than 1 of our 8 model-estimate cities in January by mean daily high. How we rank cities
Closest high and low in January: Lisbon (2.0 °C apart), Istanbul (3.7), Delhi (4.2).
| City | Gap from Porto, °C | High, °C | Low, °C | Rain, mm | Sunshine, hours |
|---|---|---|---|---|---|
| Porto (this page) | — | 14.1 | 6.4 | 133.3 | no data |
| Lisbon (closest) | 2.0 | 14.9 | 9.5 | 66.5 | no data |
| Istanbul (closest) | 3.7 | 9.3 | 3.9 | 86.3 | no data |
| Delhi (closest) | 4.2 | 21.0 | 7.8 | no data | no data |
| Melbourne | 10.5 | 26.6 | 14.8 | 52.5 | no data |
| Sydney | 13.3 | 27.1 | 19.9 | 76.1 | no data |
| Mumbai | 14.5 | 30.4 | 19.0 | no data | no data |
| Bangkok | 16.8 | 31.9 | 22.1 | no data | no data |
Sources (1991-2020): ERA5-Land model estimates, checked . Each city's page names its grid cell. All sources in full on Methodology.
Sources
- Attribution: Copernicus Climate Change Service (2025): ERA5 Land hourly time-series data from 1950 to present. Copernicus Climate Change Service (C3S) Climate Data Store (CDS). DOI: 10.24381/ee82e357. Accessed on the check date shown. Generated using or contains modified Copernicus Climate Change Service information 2025. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains. Licence: CC BY 4.0. Checked .
- NOAA Solar Calculator equations, computed locally, NOAA Global Monitoring Laboratory (method); City by Month (computation). Attribution: Computed with the NOAA Solar Calculator method (no NOAA endorsement implied). Licence: Method, not data. Checked .
- holidays Python library, run locally. Attribution: holidays library, Vacanza team. Licence: MIT. Checked .
Official sources
Cite this page: City by Month. "Porto in January: weather, daylight, holidays". https://citybymonth.com/cities/portugal/porto/january/. Last updated 8 November 2026.