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SunnyDays

ERA5 almanac — 8 years of real data

Mexico City in June

Mexico City in June: 62% of days see measurable rain, 78°F average high, 18% of days historically clear (n=240, ERA5 2018–2025).

Mexico City in June is historically a poor month for sun: only 18% of days clear across 8 years (n=240, avg high 78°F). February is the clearest month for Mexico City historically. 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 Mexico City 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 Mexico City 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		 22% n=120 78°F
Late June
16th–end		 13% n=120 78°F
Full month average 18% n=240 78°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 Mexico City 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		 86% n=120
Late June
16th–end		 59% n=120
Full month average 72% n=240
11.6 h median sunshine per day 85% of days exceed 8 h sunshine 62% of days see ≥ 1 mm rain — rain is not hidden
Comparison (old vs new): WMO-code “clear” bar: 18%. Sunshine-based “warm & sunny”: 72%. The 54-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

Mexico City is a poor choice for sun in June: just 18% of days clear historically (n=240). February is the historically strongest month for sun here. The 8-year record is consistent — this is not a fluke bad stretch.

→ See all destinations in February — historically the best month for sun in Mexico City.

Every month in Mexico City

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

Historical clear-sky % for Mexico City, all months, ERA5 2018–2025.
Month % Clear Sample (n)
January 52% n=248 All destinations →
February 71% n=226 All destinations →
March 71% n=248 All destinations →
April 51% n=240 All destinations →
May 33% n=248 All destinations →
June ← this page 18% n=240 All destinations →
July 1% n=248 All destinations →
August 2% n=248 All destinations →
September 4% n=240 All destinations →
October 20% n=248 All destinations →
November 52% n=240 All destinations →
December 50% n=248 All destinations →

Frequently asked

Does it rain in Mexico City in June?

Yes, frequently. In Mexico City, 62% of days in June see measurable rain, based on 8 years of ERA5 historical data (n=240 days, 2018–2025). This is a historical average, not a forecast.

Is Mexico City good for sun in June?

Not usually. Mexico City is historically overcast in June: only 18% of days are clear (avg high 78°F, n=240 days, ERA5 2018–2025). February is historically far better for sun here.

How Mexico City compares in June

Head-to-head clear-sky comparisons against destinations travelers plausibly weigh against Mexico City 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.