Climate averages 1991–2020
Porto weather
in January.
A cool, wet month: the coolest and the 9th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
January is a cool month in Porto: daytime highs average 12.8°C and nights cool to about 6.3°C. By daytime temperature it is the coolest month of the year.
Expect about 150 mm of rain on roughly 12 days, which makes January a wet month (the 9th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 9 h 35 min on an average January day.
The nearest other city in this atlas is Braga (47 km away). In January its highs average 11.9°C, 1.0°C cooler than Porto, with 191 mm of rain.
Among the 12 cities listed in Portugal, Porto ranks 10th of 12 for the warmest January highs and 10th of 12 for the driest January (rainfall, lowest first). The mean January high of those 12 cities is 13.7°C; Porto is 0.8°C cooler than that mean.
From January to February, average highs rise by 1.0°C to 13.9°C, and monthly rainfall falls from 150 mm to 103 mm.
The annual picture
January in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Porto climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January, selected | 12.8°C6.3°C | 6.3°C | 150 | 12.2 | 9.610 h |
| February | 13.9°C6.3°C | 6.3°C | 103 | 9.6 | 10.611 h |
| March | 16.3°C8.1°C | 8.1°C | 121 | 10.2 | 11.912 h |
| April | 17.5°C9.7°C | 9.7°C | 121 | 11.8 | 13.313 h |
| May | 20.1°C12.3°C | 12.3°C | 101 | 11.1 | 14.514 h |
| June | 23.2°C15.0°C | 15.0°C | 40 | 6.3 | 15.115 h |
| July | 25.6°C16.7°C | 16.7°C | 23 | 4.0 | 14.815 h |
| August | 26.2°C17.2°C | 17.2°C | 29 | 4.5 | 13.814 h |
| September | 24.1°C15.7°C | 15.7°C | 64 | 6.6 | 12.513 h |
| October | 20.1°C13.1°C | 13.1°C | 166 | 12.7 | 11.111 h |
| November | 15.7°C9.6°C | 9.6°C | 163 | 12.9 | 9.910 h |
| December | 13.5°C7.4°C | 7.4°C | 167 | 12.4 | 9.39 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
January in nearby cities
- Braga in JanuaryPortugal · 47 kmHigh 11.9°C · Low 3.7°C · 191 mm rain
- Aveiro in JanuaryPortugal · 56 kmHigh 13.5°C · Low 6.5°C · 128 mm rain
- Viseu in JanuaryPortugal · 80 kmHigh 10.5°C · Low 3.1°C · 152 mm rain
- Coimbra in JanuaryPortugal · 106 kmHigh 13.6°C · Low 4.9°C · 108 mm rain
- Vigo in JanuarySpain · 121 kmHigh 12.3°C · Low 6.5°C · 221 mm rain
- Pontevedra in JanuarySpain · 143 kmHigh 12.7°C · Low 6.2°C · 197 mm rain
- Ourense in JanuarySpain · 146 kmHigh 11.6°C · Low 3.8°C · 108 mm rain
- Leiria in JanuaryPortugal · 157 kmHigh 14.2°C · Low 7.0°C · 88 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Porto) is explained once on the Porto year overview and on the Sources, method and limits page.