ERA5 almanac — 8 years of real data

Mazatlán in June

Mazatlán in June: 16% of days see measurable rain, 86°F average high, 62% of days historically clear (n=240, ERA5 2018–2025).

Mazatlán in June is a mixed month for sun: 62% of days historically clear (n=240, avg high 86°F). The outcome varies year to year — check the early/late split below. Historical average, 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 Mazatlán 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 June

Clear-sky percentage for Mazatlán in June, split by half-month. “n” is the number of days sampled across 8 years (2018–2025).
Period	% Clear days	Sample (n)	Avg high
Early June 1st–15th	67%	n=120	86°F
Late June 16th–end	58%	n=120	86°F
Full month average	62%	n=240	86°F

Sunshine & warmth in June

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 Mazatlán in June. Primary: % of days ≥ 72°F with > 6 h of sunshine.
Period	Warm & sunny (≥72°F, >6 h sun)	Sample (n)
Early June 1st–15th	98%	n=120
Late June 16th–end	98%	n=120
Full month average	98%	n=240

12.6 h median sunshine per day 94% of days exceed 8 h sunshine 16% of days see ≥ 1 mm rain — rain is not hidden

Comparison (old vs new): WMO-code “clear” bar: 62%. Sunshine-based “warm & sunny”: 98%. The 36-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

Mazatlán clears solidly in June: 62% of days historically (n=240), avg high 86°F. Most trips here in June will find more sun than cloud.

Every month in Mazatlán

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

Historical clear-sky % for Mazatlán, all months, ERA5 2018–2025.
Month	% Clear	Sample (n)
January	91%	n=248	All destinations →
February	85%	n=226	All destinations →
March	98%	n=248	All destinations →
April	98%	n=240	All destinations →
May	97%	n=248	All destinations →
June ← this page	62%	n=240	All destinations →
July	33%	n=248	All destinations →
August	16%	n=248	All destinations →
September	15%	n=240	All destinations →
October	58%	n=248	All destinations →
November	90%	n=240	All destinations →
December	93%	n=248	All destinations →

Frequently asked

Does it rain in Mazatlán in June?

Rarely. Only 16% of days in Mazatlán see measurable rain in June, based on 8 years of ERA5 historical data (n=240 days, 2018–2025). This is a historical average, not a forecast.

Is Mazatlán good for sun in June?

Yes. Mazatlán is historically strong for sun in June: 62% of days are clear on average (avg high 86°F, n=240 days, ERA5 2018–2025).

How Mazatlán compares in June

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

→ Mazatlán vs Laguna Beach in June — Laguna Beach is 60% clear historically
→ Mazatlán vs Taos in June — Taos is 64% clear historically
→ Mazatlán vs Santa Fe in June — Santa Fe is 58% clear historically

→ Mazatlán live forecast — this week’s actual 7-day weather, not historical
→ Best destinations in June — all destinations ranked by June clear-sky %
→ All destinations
→ Raw data (JSON) — buckets, n, source

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.