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SunnyDays

ERA5 almanac — 8 years of real data

Door County in July

Door County in July: 29% of days see measurable rain, 77°F average high, 40% of days historically clear (n=248, ERA5 2018–2025).

Door County in July is a mixed month for sun: 40% of days historically clear (n=248, avg high 77°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 Door County 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 July

Clear-sky percentage for Door County in July, split by half-month. “n” is the number of days sampled across 8 years (2018–2025).
Period % Clear days Sample (n) Avg high
Early July
1st–15th		 45% n=120 77°F
Late July
16th–end		 36% n=128 77°F
Full month average 40% n=248 77°F

Sunshine & warmth in July

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 Door County in July. Primary: % of days ≥ 72°F with > 6 h of sunshine.
Period Warm & sunny (≥72°F, >6 h sun) Sample (n)
Early July
1st–15th		 84% n=120
Late July
16th–end		 88% n=128
Full month average 86% n=248
14.0 h median sunshine per day 94% of days exceed 8 h sunshine 29% of days see ≥ 1 mm rain — rain is not hidden
Comparison (old vs new): WMO-code “clear” bar: 40%. Sunshine-based “warm & sunny”: 86%. The 46-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

Door County in July is genuinely mixed: 40% of days historically clear (n=248), avg high 77°F — more cloudy than clear. The outcome varies year to year; don't book if you need guaranteed sun.

Every month in Door County

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

Historical clear-sky % for Door County, 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 4% n=248 All destinations →
June 22% n=240 All destinations →
July ← this page 40% n=248 All destinations →
August 42% n=248 All destinations →
September 18% 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 Door County in July?

Sometimes. Door County sees measurable rain on 29% of days in July historically (n=248 days, ERA5 2018–2025) — not frequent enough to plan around, but not negligible either.

Is Door County good for sun in July?

It's mixed. Door County in July is clear on 40% of days historically (avg high 77°F, n=248 days, ERA5 2018–2025) — the outcome varies year to year.

How Door County compares in July

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