If you plan to visit San Sebastian in January, the weather is typically alright, with an average high temperature of +54°F during the day and approximately 4 sunny days. Expect some rainy, though, as there are typically 18 rainy days in the month and around 161 mm of precipitation. The weather is changeable so you may have to pack for every eventuality. Search flightsin one click on Avionero.
Good to know:
January is usually the coldest month of the year in San Sebastian;
Average weather
☀️
+54°F
Avg. max. temperature
+21°F
Min.
+73°F
Max.
161 mm
Total precipitation
77%
Avg. humidity
3 m/s
Avg. wind
4 ☀️
Sunny Days
8 ⛅️
Cloudy
18 🌦
Rainy
Our opinion: San Sebastian has OK weather in January.
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Average temperature in San Sebastian in January
Here are the expected maximum, average and minimum temperatures in San Sebastian for January based on the historical data.
Last Year
Historical Data
Going from a maximum of +73°F during the day to a minimum of +30°F during the night, the temperature in January averages around +54°F.
The average maximum temperature goes down 54% by the end of the month, compared with the beginning of the month, from +73°F to +50°F.
Is San Sebastian warm or cold in January?
San Sebastian is typically mild in January.
Maximum temperatures go down compared to the previous month from +55°F to +54°F. The minimum temperature also goes down from +46°F to +45°F.
Pack a light jacket as it will be warm in the day and cool in the evenings.
January is the coldest month in San Sebastian, here is the comparison with other months:
Water temperature in San Sebastian in January
Water in San Sebastian in January is Cold. It varies from +54°F to +56°F, with an average of +55°F.Note that the air temperature is lower than the water temperature, averaging around +54°F.
The water temperature in January is one of the coldest of the entire year:
The warmest water temperatures in San Sebastian are reached in August, when the average sea temperature rises to +70°F. The coldest water temperatures are in February, with an average of +54°F.
Can you swim in San Sebastian in January?
We would not recommend swimming in San Sebastian in January, the water is very cold (+55°F on average). Consider swimming only if you are an experienced cold-water swimmer with proper gear.
🦭
Cold
Below +61°F
🏄♂️
Fresh
61°F - 70°F
🏊
Comfortable
70°F - 77°F
👙
Warm
77°F - 82°F
🔥
Very warm
+82°C and up
You will need a full-body wetsuit, cap, gloves, a warm change of clothes, and a hot drink ready for after your swim.
Climate in San Sebastian in January
San Sebastian weather looks like this, on average, in January and the surrounding months.
December
January
February
Avg. temperature
+55°F
+54°F
+55°F
Min. temperature
+21°F
+21°F
+23°F
Max. temperature
+75°F
+73°F
+79°F
Rainfall
161 mm
161 mm
130 mm
Wind
3 m/s
3 m/s
3 m/s
Avg. water temperature
+58°F
+55°F
+54°F
Humidity
77%
77%
75%
Air pressure
1019 HPa
1020 HPa
1019 HPa
Sunny days
5
4
4
Cloudy days
8
8
6
Rainy days
18
18
16
Snowy days
0
1
1
January weather is still as ok as in December.It’s getting colder in January. From +55°F in the day, the average maximum temperature lowers to +54°F.The rainfall amount in January stays the same as in the previous month with a 161 mm of total precipitation.Humidity levels don’t change as the month goes on, averaging around 77%.The average wind speed doesn’t change much during January, staying around 3 m/s.The days becoming less sunny, going from 5 sunny days in December to 4 in January.
February brings much the same weather, it remains ok.
Wind speed in San Sebastian in January based on historical data.
Last Year
Historical Data
The average wind speed is 3 m/s getting up to 8 m/s which is a medium breeze. You can feel it, especially getting out of the water.
The average wind speed in San Sebastian is gradually decreasing during January, going from 7 m/s to 1 m/s over the course of the month.
Rain
Amount of rainfall in mm during January in San Sebastian based on historical data.
Last Year
Historical Data
Typically, there is a 71% chance of rain on an average day in January, with total rainfall of approximately 262 mm. The maximum amount of rainfall per day is around 61 mm, which is considered heavy rain.January is a pretty wet month with over 22 rainy days, so don’t forget to pack an umbrella, raincoat, and a pair of wellies.
January is one of the rainiest months in San Sebastian, here is a comparison with other months, total mm:
San Sebastian wettest month is November, where a typical day has a 60% chance of precipitation and 191 mm of rainfall per day. July, on the other hand, is the driest month with a mere 52% chance of precipitation and 93 mm of rainfall per day.
How was the weather last January in San Sebastian?
This is the weather in San Sebastian in January 2024:
1 January
☀️
+74°F
2 January
🌧️
+58°F
3 January
☀️
+59°F
4 January
☀️
+63°F
5 January
☁️
+63°F
6 January
☀️
+61°F
7 January
🌧️
+60°F
8 January
🌧️
+61°F
9 January
🌧️
+52°F
10 January
☀️
+63°F
11 January
🌧️
+57°F
12 January
☀️
+59°F
13 January
☁️
+57°F
14 January
☀️
+66°F
15 January
🌧️
+60°F
16 January
🌧️
+51°F
17 January
🌧️
+53°F
18 January
🌧️
+47°F
19 January
🌧️
+55°F
20 January
🌧️
+50°F
21 January
☀️
+48°F
22 January
☀️
+48°F
23 January
🌧️
+41°F
24 January
☁️
+42°F
25 January
☁️
+46°F
26 January
🌧️
+50°F
27 January
🌧️
+45°F
28 January
🌧️
+42°F
29 January
☁️
+42°F
30 January
☁️
+49°F
31 January
☁️
+51°F
In January 2024 San Sebastian had 9 sunny days, 7 cloudy days, and 15 rainy days. The average maximum temperature was +54°F, with an absolute maximum of +73°F and a minimum of +41°F. The average humidity was 75%, with a maximum of 92% and a minimum of 21%. The average wind speed was 3 m/s, with a maximum of 15 m/s and a minimum of 0 m/s.
Are you planning a trip in January?
Climate Change Over the Years
This is how San Sebastian climate has changed over the last 43 years.
The climate in San Sebastian in January has not changed that much over the last 43 years.
The average temperature was the lowest in 1984 (+61°F) and the highest in 2022 (+68°F). The driest year was 1989 with only 973 mm of rainfall, and the wettest year was 2019 with 4351 mm.
FAQ
Frequently asked questions about the weather in San Sebastian in January:
Is January a good time to visit San Sebastian?
It’s always a good time to visit San Sebastian, but the weather is changeable in January, so plan a mix of indoor and outdoor activities and exploring, and pack for every eventuality.
Can you sunbathe in San Sebastian in January?
January has mild temperatures in San Sebastian. Not ideal for sunbathing, but still good for daytime outdoor activities, but plan for cool evenings. Pack a light jacket and shorts!
Can you swim in San Sebastian in January?
Swimming in San Sebastian in January is challenging and not recommended for inexperienced swimmers or without proper equipment and preparation.
Is San Sebastian rainy in January?
San Sebastian is often rainy in January. You may get a bit damp when outside, so pack an umbrella, and maybe even a raincoat.
Is it sunny in San Sebastian in January?
Usually, it’s not very sunny in San Sebastian in January, often it’s pretty cloudy. Pack for any eventuality; layering can help reduce the number of bulky items needed.
For this page, we’ve looked at the typical weather in San Sebastian, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.
