Skip to main content
SunnyDays

ERA5 almanac — 8 years of real data

Birmingham in June

Birmingham in June: 44% of days see measurable rain, 87°F average high, 30% of days historically clear (n=240, ERA5 2018–2025).

Birmingham in June is historically a poor month for sun: only 30% of days clear across 8 years (n=240, avg high 87°F). 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 Birmingham 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 Birmingham 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		 37% n=120 87°F
Late June
16th–end		 23% n=120 87°F
Full month average 30% n=240 87°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 Birmingham 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		 93% n=120
Late June
16th–end		 95% n=120
Full month average 94% n=240
12.6 h median sunshine per day 89% of days exceed 8 h sunshine 44% of days see ≥ 1 mm rain — rain is not hidden
Comparison (old vs new): WMO-code “clear” bar: 30%. Sunshine-based “warm & sunny”: 94%. The 64-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

Birmingham is mostly overcast in June historically: only 30% of days are clear across 8 years (n=240), avg high 87°F. Most visitors this month will see more clouds than sun.

Every month in Birmingham

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

Historical clear-sky % for Birmingham, all months, ERA5 2018–2025.
Month % Clear Sample (n)
January 0% n=248 All destinations →
February 1% n=226 All destinations →
March 9% n=248 All destinations →
April 27% n=240 All destinations →
May 36% n=248 All destinations →
June ← this page 30% n=240 All destinations →
July 17% n=248 All destinations →
August 28% n=248 All destinations →
September 49% n=240 All destinations →
October 44% n=248 All destinations →
November 14% n=240 All destinations →
December 1% n=248 All destinations →

Frequently asked

Does it rain in Birmingham in June?

Sometimes. Birmingham sees measurable rain on 44% of days in June historically (n=240 days, ERA5 2018–2025) — not frequent enough to plan around, but not negligible either.

Is Birmingham good for sun in June?

It's mixed. Birmingham in June is clear on 30% of days historically (avg high 87°F, n=240 days, ERA5 2018–2025) — the outcome varies year to year.

How Birmingham compares in June

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