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SunnyDays

ERA5 almanac — 8 years of real data

McCall in August

McCall in August: 14% of days see measurable rain, 79°F average high, 65% of days historically clear (n=248, ERA5 2018–2025).

McCall in August is a mixed month for sun: 65% of days historically clear (n=248, avg high 79°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 McCall 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 August

Clear-sky percentage for McCall in August, split by half-month. “n” is the number of days sampled across 8 years (2018–2025).
Period % Clear days Sample (n) Avg high
Early August
1st–15th		 69% n=120 79°F
Late August
16th–end		 61% n=128 79°F
Full month average 65% n=248 79°F

Sunshine & warmth in August

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 McCall in August. Primary: % of days ≥ 72°F with > 6 h of sunshine.
Period Warm & sunny (≥72°F, >6 h sun) Sample (n)
Early August
1st–15th		 92% n=120
Late August
16th–end		 76% n=128
Full month average 84% n=248
13.4 h median sunshine per day 96% of days exceed 8 h sunshine 14% of days see ≥ 1 mm rain — rain is not hidden
Comparison (old vs new): WMO-code “clear” bar: 65%. Sunshine-based “warm & sunny”: 84%. The 19-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

McCall clears solidly in August: 65% of days historically (n=248), avg high 79°F. Most trips here in August will find more sun than cloud.

Every month in McCall

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

Historical clear-sky % for McCall, 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 5% n=248 All destinations →
June 30% n=240 All destinations →
July 76% n=248 All destinations →
August ← this page 65% n=248 All destinations →
September 34% n=240 All destinations →
October 1% n=248 All destinations →
November 0% n=240 All destinations →
December 0% n=248 All destinations →

Frequently asked

Does it rain in McCall in August?

Rarely. Only 14% of days in McCall see measurable rain in August, based on 8 years of ERA5 historical data (n=248 days, 2018–2025). This is a historical average, not a forecast.

Is McCall good for sun in August?

Yes. McCall is historically strong for sun in August: 65% of days are clear on average (avg high 79°F, n=248 days, ERA5 2018–2025).

How McCall compares in August

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