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SunnyDays

ERA5 almanac — 8 years of real data

The Hamptons in June

The Hamptons in June: 32% of days see measurable rain, 72°F average high, 22% of days historically clear (n=240, ERA5 2018–2025).

The Hamptons in June is historically a poor month for sun: only 22% of days clear across 8 years (n=240, avg high 72°F). July is the clearest month for The Hamptons 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 The Hamptons 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 The Hamptons 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		 10% n=120 72°F
Late June
16th–end		 35% n=120 72°F
Full month average 22% n=240 72°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 The Hamptons 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		 23% n=120
Late June
16th–end		 60% n=120
Full month average 42% n=240
13.2 h median sunshine per day 86% of days exceed 8 h sunshine 32% of days see ≥ 1 mm rain — rain is not hidden
Comparison (old vs new): WMO-code “clear” bar: 22%. Sunshine-based “warm & sunny”: 42%. The 20-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

The Hamptons is mostly overcast in June historically: only 22% of days are clear across 8 years (n=240), avg high 72°F. The two halves differ materially (10% early, 35% late) — favour the late half of the month. If you want sun in The Hamptons, July is historically much better. Most visitors this month will see more clouds than sun.

→ See all destinations in July — historically the best month for sun in The Hamptons.

Every month in The Hamptons

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

Historical clear-sky % for The Hamptons, all months, ERA5 2018–2025.
Month % Clear Sample (n)
January 0% n=248 All destinations →
February 0% n=226 All destinations →
March 0% n=248 All destinations →
April 0% n=240 All destinations →
May 3% n=248 All destinations →
June ← this page 22% n=240 All destinations →
July 44% n=248 All destinations →
August 44% n=248 All destinations →
September 28% n=240 All destinations →
October 3% n=248 All destinations →
November 0% n=240 All destinations →
December 0% n=248 All destinations →

Frequently asked

Does it rain in The Hamptons in June?

Sometimes. The Hamptons sees measurable rain on 32% of days in June historically (n=240 days, ERA5 2018–2025) — not frequent enough to plan around, but not negligible either.

Is The Hamptons good for sun in June?

Not usually. The Hamptons is historically overcast in June: only 22% of days are clear (avg high 72°F, n=240 days, ERA5 2018–2025). July is historically far better for sun here.

How The Hamptons compares in June

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