Climate and average weather in San Fermín
In San Fermín, the summers are sweltering, dry, and clear and the winters are cool and partly cloudy.
Over the course of the year, the temperature in San Fermín typically varies from 2°C to 34°C, and is rarely below -3°C or above 38°C. July is the hottest month of the year, while January is the coldest.
Based on the travel score, the best times of year to visit San Fermín for warm-weather activities are from early April to mid June and early September to late October.
- Hottest
- Jul
- 34°
- Coldest
- Jan
- 2°
- Wettest
- Oct
- 57 mm
- Driest
- Jul
- 7 mm
- Rain / yr
- 407 mm
- 67 wet days
- Daylight
- 9.1–14.9 h
- shortest–longest
- Elevation
- 577 m
- 40.4°N
- Clearest
- Jul
- 19% cloud
San Fermín weather by month, at a glance
The whole year in one picture — sky, rain, humidity, temperature and travel score. Click any band to jump to its full chart.
Each stripe is one measure across the whole year, stacked so a single day reads top to bottom. The sky band runs overcast grey on top down to clear blue at the base — more blue means sunnier — followed by the rainfall curve, the humidity band, a temperature strip that tints each stretch of the year by how warm its average high is, and the travel-score line at the foot. Scan straight down any date to read that day across every measure at once; the score climbs highest around early April to mid June.
Temperature through the year
Daily average highs and lows in San Fermín, from 1991–2020 of climate data. The shaded bands show the range most days fall in — 10th to 90th percentile.
The hot season lasts 3.1 months, from June 11 to September 12, with daily high temperatures above 28°C. The hottest month of the year in San Fermín is July, with an average high of 34°C and low of 19°C.
The cool season lasts 3.6 months, from November 13 to March 3, with daily high temperatures below 15°C. The coldest month of the year in San Fermín is January, with an average low of 2°C and high of 11°C.
Days typically run about 11°C warmer than nights, with the widest day–night swing (around 14°C) in July.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 11 | 13 | 17 | 19 | 24 | 30 | 34 | 33 | 28 | 21 | 15 | 11 |
| Avg low (°C) | 2 | 3 | 5 | 8 | 12 | 17 | 19 | 19 | 15 | 11 | 6 | 3 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| Jan | 11 | 2 |
| Feb | 13 | 3 |
| Mar | 17 | 5 |
| Apr | 19 | 8 |
| May | 24 | 12 |
| Jun | 30 | 17 |
| Jul | 34 | 19 |
| Aug | 33 | 19 |
| Sep | 28 | 15 |
| Oct | 21 | 11 |
| Nov | 15 | 6 |
| Dec | 11 | 3 |
How hot and cold San Fermín really feels
The felt-temperature range through the year — heat index on the day's high (summer humidity), wind chill on the night's low (winter wind). The dashed lines are the plain thermometer; the gap is how much hotter or colder it really feels.
On the hottest afternoons, once humidity is folded in, San Fermín feels like about 35°C (around July 24). About 60 days a year carry some heat stress, peaking in July.
On the coldest nights, wind chill pulls the feels-like down to about -1°C (around January 19), with roughly 48 freezing days a year (feels-like at or below 0°C), worst in January.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Feels-like high (°C) | 11 | 13 | 17 | 19 | 24 | 30 | 34 | 33 | 28 | 21 | 15 | 11 |
| Air high (°C) | 11 | 13 | 17 | 19 | 24 | 30 | 34 | 33 | 28 | 21 | 15 | 11 |
| Feels-like low (°C) | -1 | 0 | 3 | 6 | 12 | 16 | 19 | 19 | 15 | 10 | 4 | 1 |
| Air low (°C) | 2 | 3 | 5 | 8 | 12 | 17 | 19 | 19 | 15 | 11 | 6 | 3 |
| Feels-like high (°C) | Air high (°C) | Feels-like low (°C) | Air low (°C) | |
|---|---|---|---|---|
| Jan | 11 | 11 | -1 | 2 |
| Feb | 13 | 13 | 0 | 3 |
| Mar | 17 | 17 | 3 | 5 |
| Apr | 19 | 19 | 6 | 8 |
| May | 24 | 24 | 12 | 12 |
| Jun | 30 | 30 | 16 | 17 |
| Jul | 34 | 34 | 19 | 19 |
| Aug | 33 | 33 | 19 | 19 |
| Sep | 28 | 28 | 15 | 15 |
| Oct | 21 | 21 | 10 | 11 |
| Nov | 15 | 15 | 4 | 6 |
| Dec | 11 | 11 | 1 | 3 |
Average hourly temperature in San Fermín
A compact picture of the whole year, hour by hour: each column is a day, each row an hour, and the color is the modeled average temperature. Darker overlays mark night, lighter ones the civil-twilight hours around sunrise and sunset.
Read left to right for the day of the year and top to bottom for the hour of the day; the color is the modeled temperature, cool blues through to hot reds on the same scale as the other charts. A vertical slice is a single day's swing — coolest just before dawn, warmest in the mid-afternoon — while a horizontal slice follows one hour across the seasons. The darker overlay marks night and the lighter one the twilight around sunrise and sunset. Colors run warmest on July afternoons, near 34°C, and coldest before dawn in January, near 2°C.
San Fermín weather by month
Every month at a glance. Click a month for its detailed page.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 11° / 2° | 37 | 6.8 | 0.4 | 9.5 | 2.8 |
| Feb | 13° / 3° | 33 | 5.7 | 0.5 | 10.4 | 4.0 |
| Mar | 17° / 5° | 39 | 6.8 | 0.2 | 11.7 | 5.9 |
| Apr | 19° / 8° | 46 | 7.5 | 0 | 13 | 6.6 |
| May | 24° / 12° | 41 | 7.3 | 0 | 14.2 | 7.4 |
| Jun | 30° / 17° | 18 | 3.6 | 0 | 14.8 | 6.3 |
| Jul | 34° / 19° | 7 | 1.4 | 0 | 14.6 | 4.1 |
| Aug | 33° / 19° | 10 | 2.4 | 0 | 13.6 | 4.4 |
| Sep | 28° / 15° | 22 | 3.7 | 0 | 12.3 | 7.2 |
| Oct | 21° / 11° | 57 | 7.5 | 0 | 10.9 | 7.0 |
| Nov | 15° / 6° | 52 | 7.4 | 0 | 9.8 | 4.6 |
| Dec | 11° / 3° | 45 | 7.1 | 0.3 | 9.2 | 2.9 |
Chance of rain
How likely it is to rain on a typical day, and how that shifts across the wetter and drier seasons.
San Fermín gets about 407 mm of precipitation a year. On a typical day the chance of rain is some rain, but that rises and falls sharply with the seasons.
The wetter season lasts 7.8 months, from around Oct 6 to May 29, peaking in October at about 28% chance on a given day. The drier stretch runs the rest of the year, bottoming out around Jul 18.
October is the wettest month by volume, with 57 mm over about 8 wet days; July is the driest, with 7 mm.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain on a day (%) | 22 | 21 | 22 | 25 | 23 | 12 | 5 | 7 | 12 | 24 | 25 | 23 |
| Rain days | 7 | 6 | 7 | 8 | 7 | 4 | 1 | 2 | 4 | 8 | 7 | 7 |
| Rain on a day (%) | Rain days | |
|---|---|---|
| Jan | 22 | 7 |
| Feb | 21 | 6 |
| Mar | 22 | 7 |
| Apr | 25 | 8 |
| May | 23 | 7 |
| Jun | 12 | 4 |
| Jul | 5 | 1 |
| Aug | 7 | 2 |
| Sep | 12 | 4 |
| Oct | 24 | 8 |
| Nov | 25 | 7 |
| Dec | 23 | 7 |
Monthly rainfall
Over a full year, San Fermín collects about 407 mm of rain across 67 wet days — roughly 34 mm in an average month.
It doesn’t fall evenly. October is the wettest month with 57 mm, while July is the driest at just 7 mm. The three wettest months alone bring about 38% of the year’s total, and some of the cold-season precipitation falls as snow.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rainfall (mm) | 37 | 33 | 39 | 46 | 41 | 18 | 7 | 10 | 22 | 57 | 52 | 45 |
| Rain days | 7 | 6 | 7 | 8 | 7 | 4 | 1 | 2 | 4 | 8 | 7 | 7 |
| Snow days | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Rainfall (mm) | Rain days | Snow days | |
|---|---|---|---|
| Jan | 37 | 7 | 0 |
| Feb | 33 | 6 | 1 |
| Mar | 39 | 7 | 0 |
| Apr | 46 | 8 | 0 |
| May | 41 | 7 | 0 |
| Jun | 18 | 4 | 0 |
| Jul | 7 | 1 | 0 |
| Aug | 10 | 2 | 0 |
| Sep | 22 | 4 | 0 |
| Oct | 57 | 8 | 0 |
| Nov | 52 | 7 | 0 |
| Dec | 45 | 7 | 0 |
Clouds and sunshine
How often the daytime sky is clear, partly cloudy or overcast.
In San Fermín, the average share of the sky covered by clouds shows significant seasonal variation over the course of the year.
The clearer part of the year begins around May 22 and lasts for 4.5 months, ending around October 6. The clearest month is July, when the sky is clear, mostly clear, or partly cloudy 92% of the time on average.
The cloudier part of the year begins around October 7 and lasts for 7.5 months, ending around May 21. The cloudiest month is December, when it is overcast or mostly cloudy 52% of the time.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 51 | 54 | 55 | 51 | 59 | 77 | 92 | 90 | 75 | 55 | 52 | 48 |
| Cloudier (%) | 49 | 46 | 45 | 49 | 41 | 23 | 8 | 10 | 25 | 45 | 48 | 52 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| Jan | 51 | 49 |
| Feb | 54 | 46 |
| Mar | 55 | 45 |
| Apr | 51 | 49 |
| May | 59 | 41 |
| Jun | 77 | 23 |
| Jul | 92 | 8 |
| Aug | 90 | 10 |
| Sep | 75 | 25 |
| Oct | 55 | 45 |
| Nov | 52 | 48 |
| Dec | 48 | 52 |
Daylight, sunrise and sunset
Hours of daylight through the year, with sunrise and sunset times.
The gold band is daylight — sunrise runs along its lower edge, sunset along the upper — so it widens toward summer and pinches toward winter, with night the dark area above and below. The longest day, around June 15, brings about 14 h 54 min of light; the shortest, around December 14, only 9 h 06 min — a swing of roughly 5 h 48 min.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 9.5 | 10.4 | 11.7 | 13.0 | 14.2 | 14.8 | 14.6 | 13.6 | 12.3 | 10.9 | 9.8 | 9.2 |
| Sunrise (AM) | 8:41 | 8:17 | 7:34 | 6:43 | 6:04 | 5:49 | 6:02 | 6:30 | 7:01 | 7:33 | 8:08 | 8:37 |
| Sunset (PM) | 6:07 | 6:42 | 7:14 | 7:47 | 8:18 | 8:41 | 8:39 | 8:07 | 7:17 | 6:27 | 5:52 | 5:45 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| Jan | 9.5 | 8:41 | 6:07 |
| Feb | 10.4 | 8:17 | 6:42 |
| Mar | 11.7 | 7:34 | 7:14 |
| Apr | 13.0 | 6:43 | 7:47 |
| May | 14.2 | 6:04 | 8:18 |
| Jun | 14.8 | 5:49 | 8:41 |
| Jul | 14.6 | 6:02 | 8:39 |
| Aug | 13.6 | 6:30 | 8:07 |
| Sep | 12.3 | 7:01 | 7:17 |
| Oct | 10.9 | 7:33 | 6:27 |
| Nov | 9.8 | 8:08 | 5:52 |
| Dec | 9.2 | 8:37 | 5:45 |
Sunny days
How many genuinely sunny days each month brings — days the sky stays clear or mostly clear — banded into plain-language zones.
San Fermín averages about 15 sunny days a month — counting the days the sky stays clear or mostly clear — with a clear seasonal swing between 9 and 26 days.
The sunnier stretch runs 4.3 months, from around May 28 to Oct 4. The sunniest month is July, with roughly 25 sunny days (brilliant).
The greyest month is May, down near 12 sunny days — about 53% fewer than the July peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sunny days | 12 | 11 | 12 | 10 | 12 | 18 | 25 | 24 | 17 | 12 | 11 | 11 |
| Sky | Mixed | Mixed | Mixed | Mixed | Mixed | Bright | Brilliant | Brilliant | Bright | Mixed | Mixed | Mixed |
| Sunny days | Sky | |
|---|---|---|
| Jan | 12 | Mixed |
| Feb | 11 | Mixed |
| Mar | 12 | Mixed |
| Apr | 10 | Mixed |
| May | 12 | Mixed |
| Jun | 18 | Bright |
| Jul | 25 | Brilliant |
| Aug | 24 | Brilliant |
| Sep | 17 | Bright |
| Oct | 12 | Mixed |
| Nov | 11 | Mixed |
| Dec | 11 | Mixed |
Humidity comfort
Share of days at each humidity comfort level, based on the dew point — the measure that tracks how muggy it actually feels.
Humidity comfort is graded by the dew point — the temperature at which the air would be fully saturated — because it tracks how muggy it actually feels far better than relative humidity does. A low dew point feels dry and crisp; a high one feels sticky and oppressive no matter the reading on a humidity gauge.
In San Fermín, the air stays dry or comfortable essentially all year. Even in September, the muggiest month, it feels humid or worse only about 1% of the time — humidity is not something you need to plan around here.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 100 | 100 | 100 | 100 | 97 | 92 | 95 | 88 | 86 | 89 | 99 | 100 |
| Comfortable (%) | 0 | 0 | 0 | 0 | 3 | 8 | 5 | 10 | 13 | 11 | 1 | 0 |
| Humid (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 0 |
| Dry (%) | Comfortable (%) | Humid (%) | |
|---|---|---|---|
| Jan | 100 | 0 | 0 |
| Feb | 100 | 0 | 0 |
| Mar | 100 | 0 | 0 |
| Apr | 100 | 0 | 0 |
| May | 97 | 3 | 0 |
| Jun | 92 | 8 | 0 |
| Jul | 95 | 5 | 0 |
| Aug | 88 | 10 | 1 |
| Sep | 86 | 13 | 1 |
| Oct | 89 | 11 | 0 |
| Nov | 99 | 1 | 0 |
| Dec | 100 | 0 | 0 |
Wind
Average wind speed through the year, banded into plain-language speed zones so a number reads as 'breezy' or 'calm' without knowing the scale.
This is the average sustained wind speed at the standard 10 metres above open ground — the steady flow a weather station reports, not the sharper gusts that come and go, which can run half again as fast. It's the number that says whether a place is generally breezy or calm.
Wind in San Fermín is steady company: average speeds sit near 9 km/h — calm — in every month of the year, with no meaningful windy or calm season.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 9 | 9 | 10 | 10 | 9 | 9 | 9 | 9 | 8 | 9 | 9 | 8 |
| Feels | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm |
| Wind speed (km/h) | Feels | |
|---|---|---|
| Jan | 9 | calm |
| Feb | 9 | calm |
| Mar | 10 | calm |
| Apr | 10 | calm |
| May | 9 | calm |
| Jun | 9 | calm |
| Jul | 9 | calm |
| Aug | 9 | calm |
| Sep | 8 | calm |
| Oct | 9 | calm |
| Nov | 9 | calm |
| Dec | 8 | calm |
Best time to visit San Fermín
To characterize how pleasant the weather is in San Fermín throughout the year, we compute two travel scores — one for general sightseeing, one for beach and pool weather.
Around mid April, San Fermín is still near the start of its best-weather window — great conditions with the peak-season crowds not yet at full swing.
Inferred from the travel-score curve; month-by-month visitor numbers are a planned addition.
The travel score favors clear, rainless days with daytime highs between 18°C and 28°C. Based on this score, the best times of year to visit San Fermín for general outdoor tourist activities run from early April to mid June and again from early September to late October, with a peak score in the last week of September.
The travel score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Travel score (0–10) | 2.8 | 4.0 | 5.8 | 6.6 | 7.3 | 6.3 | 4.2 | 4.5 | 7.1 | 6.9 | 4.7 | 2.9 |
| Rating | poor | fair | good | good | good | good | fair | fair | good | good | fair | poor |
| Travel score (0–10) | Rating | |
|---|---|---|
| Jan | 2.8 | poor |
| Feb | 4.0 | fair |
| Mar | 5.8 | good |
| Apr | 6.6 | good |
| May | 7.3 | good |
| Jun | 6.3 | good |
| Jul | 4.2 | fair |
| Aug | 4.5 | fair |
| Sep | 7.1 | good |
| Oct | 6.9 | good |
| Nov | 4.7 | fair |
| Dec | 2.9 | poor |
The beach/pool score favors clear, rainless days with daytime highs between 24°C and 34°C. Based on this score, the best time of year to visit San Fermín for hot-weather activities is from late May to early October, with a peak score in the first week of September.
The beach/pool score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).
What to pack for San Fermín, by month
Month by month, what's worth putting in the bag — from the temperature range, rain chance, sun and wind. Tap a month for a quick packing note.
For a warm-season trip around July (highs near 34°C), the essentials are light clothes and sun protection. In the cold season around January (highs near 11°C), pack a warm layer.
In July, San Fermín sees daytime highs around 34°C and nights near 19°C. Pack light clothes and sun protection.
UV index (midday) in San Fermín by month
Clear-sky midday UV index through the year, shaded by the WHO exposure levels — how much sun protection each month calls for.
Under clear skies, the midday UV index in San Fermín peaks around July 15 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 19 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 | 2 | 6 | 7 | 7 | 9 | 10 | 9 | 6 | 4 | 2 | 2 |
| Level | Moderate | Moderate | High | High | High | Very high | Very high | Very high | High | Moderate | Moderate | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 2 | Moderate |
| Feb | 2 | Moderate |
| Mar | 6 | High |
| Apr | 7 | High |
| May | 7 | High |
| Jun | 9 | Very high |
| Jul | 10 | Very high |
| Aug | 9 | Very high |
| Sep | 6 | High |
| Oct | 4 | Moderate |
| Nov | 2 | Moderate |
| Dec | 2 | Low |
Average hourly UV index in San Fermín
Modeled clear-sky UV for every hour of every day — when in the day sun protection actually matters.
The whole year hour by hour: each column is a day, each row an hour, and the color is the modeled clear-sky UV index — the midday peak scaled down as the sun sits lower in the sky. Darker overlays mark night, lighter ones the civil-twilight hours around sunrise and sunset.
UV falls off far faster than brightness as the sun drops, so even in July the burn window is concentrated in the middle of the day: about 8.5 hours a day reach index 3 (protection recommended), and 6 hours reach 6 or more. Mornings and late afternoons stay comparatively gentle year round.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV ≥ 3 (h/day) | 0 | 0 | 5.5 | 7 | 7 | 8.5 | 8.5 | 8 | 6 | 4 | 0 | 0 |
| UV ≥ 6 (h/day) | 0 | 0 | 0 | 2.5 | 3 | 5.5 | 6 | 5 | 2 | 0 | 0 | 0 |
| UV ≥ 3 (h/day) | UV ≥ 6 (h/day) | |
|---|---|---|
| Jan | 0 | 0 |
| Feb | 0 | 0 |
| Mar | 5.5 | 0 |
| Apr | 7 | 2.5 |
| May | 7 | 3 |
| Jun | 8.5 | 5.5 |
| Jul | 8.5 | 6 |
| Aug | 8 | 5 |
| Sep | 6 | 2 |
| Oct | 4 | 0 |
| Nov | 0 | 0 |
| Dec | 0 | 0 |
Growing season
San Fermín is mild enough that a frost-free day stays more likely than not even in midwinter. Nights are reliably above freezing from about March 4 to November 21 (263 days); outside that window a hard frost is an occasional risk.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Frost-free chance (%) | 71 | 80 | 96 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 94 | 77 |
| Frost nights | 31 | 28 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 9 | 31 |
| Frost-free chance (%) | Frost nights | |
|---|---|---|
| Jan | 71 | 31 |
| Feb | 80 | 28 |
| Mar | 96 | 4 |
| Apr | 100 | 0 |
| May | 100 | 0 |
| Jun | 100 | 0 |
| Jul | 100 | 0 |
| Aug | 100 | 0 |
| Sep | 100 | 0 |
| Oct | 100 | 0 |
| Nov | 94 | 9 |
| Dec | 77 | 31 |
Growing degree days
Growing degree days tally heat above 10°C: each day adds however many degrees its average temperature runs over that threshold, and cold days add nothing. San Fermín banks about 2,323 degree days a year, and the running total — which growers use to time plantings and predict maturity — climbs fastest around July.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Growing degree days (°C·days) | 0 | 0 | 34 | 105 | 240 | 391 | 513 | 497 | 342 | 179 | 22 | 0 |
| Growing degree days (°C·days) | |
|---|---|
| Jan | 0 |
| Feb | 0 |
| Mar | 34 |
| Apr | 105 |
| May | 240 |
| Jun | 391 |
| Jul | 513 |
| Aug | 497 |
| Sep | 342 |
| Oct | 179 |
| Nov | 22 |
| Dec | 0 |
Solar energy
Average daily shortwave solar energy reaching the ground, banded into brightness zones so the number means something at a glance.
Solar energy is how much sunlight actually reaches the ground each day, measured in kilowatt-hours per square metre (kWh/m²) — the combined effect of how long the sun is up, how high it climbs, and how much cloud gets in the way. It's the raw fuel a solar panel has to work with: for scale, 1 kWh/m² a day is dim and wintry, while 7+ is desert-bright.
San Fermín receives about 4.8 kWh/m² a day of solar energy on average — bright — with a clear seasonal swing between 1.9 and 7.9 kWh/m².
The brighter stretch of the year lasts 6.1 months, from around Mar 22 to Sep 23. The brightest month is July, averaging about 7.8 kWh/m² (intense).
The dimmest month is December, down near 1.9 kWh/m² — roughly 76% less than the July peak.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 2.2 | 3.2 | 4.6 | 5.8 | 6.8 | 7.6 | 7.8 | 6.9 | 5.3 | 3.6 | 2.4 | 1.9 |
| Level | Moderate | Moderate | Bright | Bright | Intense | Intense | Intense | Intense | Bright | Moderate | Moderate | Dim |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| Jan | 2.2 | Moderate |
| Feb | 3.2 | Moderate |
| Mar | 4.6 | Bright |
| Apr | 5.8 | Bright |
| May | 6.8 | Intense |
| Jun | 7.6 | Intense |
| Jul | 7.8 | Intense |
| Aug | 6.9 | Intense |
| Sep | 5.3 | Bright |
| Oct | 3.6 | Moderate |
| Nov | 2.4 | Moderate |
| Dec | 1.9 | Dim |
Where is San Fermín?
San Fermín sits at 40.4°N, 3.7°W, 577 m above sea level, in Spain. The nearest listed city is Entrevías, 2.0 km away.
Topography around San Fermín
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of San Fermín.
Within 3 km, the terrain around San Fermín has only modest variations in elevation — a maximum elevation change of 114 m around an average of 596 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 237 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,006 m.
The land around San Fermín is covered by artificial surfaces (70%) within 3 km, artificial surfaces (43%) and grassland (24%) within 16 km, and cropland (39%), grassland (34%) and trees (20%) within 80 km.
Spain travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type C / F
- 230 V · 50 Hz
- Prices
- ≈ 65% of US
- price level, 2025
- GDP per capita
- $38,627
- 2025
- Happiness
- 6.5 / 10
- World Happiness, 2025
- Safe drinking water
- 99%
- of population, 2024
- Homicide rate
- 0.7
- per 100k, 2023
- Road deaths
- 3.9
- per 100k/yr, 2019
- Income group
- High
- World Bank
- English
- Moderate
- EF EPI 540
- 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 San Fermín (40.3706°, -3.6891°, elevation 577 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. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).