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SunnyDays

ERA5 almanac — 8 years of real data

Seville in May

Seville in May: 14% of days see measurable rain, 84°F average high, 74% of days historically clear (n=248, ERA5 2018–2025).

Historically one of the better months to visit Seville for sun: 74% of days are clear on average (n=248, avg high 84°F). Every percentage here is a historical average from 8 years of ERA5 data — not a forecast.

What you are reading: 8-year historical averages from the ERA5 reanalysis, not a forecast. A month that is historically 90% clear can still be overcast on your specific trip. For this week’s actual forecast, see the live Seville page. Both can be true at once: “historically strong in this month; this particular week is not.” We label which is which.

Early vs. Late May

Clear-sky percentage for Seville in May, split by half-month. “n” is the number of days sampled across 8 years (2018–2025).
Period % Clear days Sample (n) Avg high
Early May
1st–15th		 71% n=120 84°F
Late May
16th–end		 76% n=128 84°F
Full month average 74% n=248 84°F

Sunshine & warmth in May

A second measure using actual sunshine hours (ERA5 sunshine_duration), not the daily weather code. A Lowcountry day with 12 hours of sun and a 25-minute afternoon storm is counted below as a warm, sunny day — because it was. How we define this.

Sunshine-based metrics for Seville in May. Primary: % of days ≥ 72°F with > 6 h of sunshine.
Period Warm & sunny (≥72°F, >6 h sun) Sample (n)
Early May
1st–15th		 82% n=120
Late May
16th–end		 94% n=128
Full month average 88% n=248
13.1 h median sunshine per day 97% of days exceed 8 h sunshine 14% of days see ≥ 1 mm rain — rain is not hidden
Comparison (old vs new): WMO-code “clear” bar: 74%. Sunshine-based “warm & sunny”: 88%. The 14-point gap is from brief afternoon convective storms that stamp the whole day as “rain” in the WMO code but leave the bulk of the sunshine untouched.

Bottom line

Seville clears solidly in May: 74% of days historically (n=248), avg high 84°F. Most trips here in May will find more sun than cloud.

Every month in Seville

Compare across all months with data. Numbers are historical clear-sky %.

Historical clear-sky % for Seville, all months, ERA5 2018–2025.
Month % Clear Sample (n)
January 1% n=248 All destinations →
February 11% n=226 All destinations →
March 26% n=248 All destinations →
April 40% n=240 All destinations →
May ← this page 74% n=248 All destinations →
June 82% n=240 All destinations →
July 99% n=248 All destinations →
August 96% n=248 All destinations →
September 76% n=240 All destinations →
October 63% n=248 All destinations →
November 16% n=240 All destinations →
December 0% n=248 All destinations →

Frequently asked

Does it rain in Seville in May?

Rarely. Only 14% of days in Seville see measurable rain in May, based on 8 years of ERA5 historical data (n=248 days, 2018–2025). This is a historical average, not a forecast.

Is Seville good for sun in May?

Yes. Seville is historically strong for sun in May: 74% of days are clear on average (avg high 84°F, n=248 days, ERA5 2018–2025).

How Seville compares in May

Head-to-head clear-sky comparisons against destinations travelers plausibly weigh against Seville this month — same passport tier, similar flight distance, both sides from the same 8-year ERA5 record.

All percentages are historical averages from the ERA5 reanalysis via Open-Meteo, 8 full years (2018–2025). “Clear” means avg high ≥ 72 °F, precipitation < 1 mm, and a non-precipitation weather code. This is history, not a forecast. The live 7-day outlook for any destination is on its own page and may differ from the long-run average. Data from Open-Meteo.