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SunnyDays

ERA5 almanac — 8 years of real data

Coeur d'Alene in August

Coeur d'Alene in August: 12% of days see measurable rain, 85°F average high, 75% of days historically clear (n=248, ERA5 2018–2025).

Historically one of the better months to visit Coeur d'Alene for sun: 75% of days are clear on average (n=248, avg high 85°F). Every percentage here is a historical average from 8 years of ERA5 data — 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 Coeur d'Alene 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 Coeur d'Alene 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		 82% n=120 85°F
Late August
16th–end		 69% n=128 85°F
Full month average 75% n=248 85°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 Coeur d'Alene 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		 95% n=120
Late August
16th–end		 84% n=128
Full month average 89% n=248
13.5 h median sunshine per day 92% of days exceed 8 h sunshine 12% of days see ≥ 1 mm rain — rain is not hidden
Comparison (old vs new): WMO-code “clear” bar: 75%. Sunshine-based “warm & sunny”: 89%. The 14-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

Coeur d'Alene clears solidly in August: 75% of days historically (n=248), avg high 85°F. Most trips here in August will find more sun than cloud.

Every month in Coeur d'Alene

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

Historical clear-sky % for Coeur d'Alene, all months, ERA5 2018–2025.
Month % Clear Sample (n)
January 0% n=248 All destinations →
February 0% n=226 All destinations →
March 1% n=248 All destinations →
April 2% n=240 All destinations →
May 20% n=248 All destinations →
June 44% n=240 All destinations →
July 82% n=248 All destinations →
August ← this page 75% n=248 All destinations →
September 50% n=240 All destinations →
October 10% n=248 All destinations →
November 0% n=240 All destinations →
December 0% n=248 All destinations →

Frequently asked

Does it rain in Coeur d'Alene in August?

Rarely. Only 12% of days in Coeur d'Alene 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 Coeur d'Alene good for sun in August?

Yes. Coeur d'Alene is historically strong for sun in August: 75% of days are clear on average (avg high 85°F, n=248 days, ERA5 2018–2025).

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.