The reliable window runs 15 Oct to 28 Apr, when the floor of good outdoor time holds near 11 hours a day (no rain, no oppressive heat, no biting cold). The single most reliable two weeks are 30 Nov – 13 Dec, at a floor of 10 hours a day. The stretch to avoid is 27 May to 15 Sep, when the floor falls away — the limit is oppressive heat. These are floors (held in at least 24 of the last 25 years), not averages — and resolved to the week, and to the hour.
Reliable outdoor hours per day (8am–10pm), week by week. The green band is the reliable window; the red band is the stretch to avoid; the gold marker is the single best fortnight. Source: Forelore analysis of 25 years of NASA & Copernicus satellite record.
| Window | Dates | Reliable floor | What to know |
|---|---|---|---|
| Peak fortnight | 30 Nov – 13 Dec | ~10 h/day | The single most reliable two weeks. |
| Reliable window | 15 Oct – 28 Apr | ~11 h/day | The season to plan an outdoor ceremony in. |
| Falling edge | 29 Apr – 26 May | turning | Turns over within weeks — book only with a backup. |
| Avoid | 27 May – 15 Sep | low | The limit is oppressive heat. |
| Recovering edge | 16 Sep – 14 Oct | rising | Improving but still variable week to week. |
“Reliable floor” = good outdoor hours (8am–10pm) held in at least 24 of the last 25 years. Dates are the observed edges of each window, resolved to the week.
A wedding happens at a time, not just a date. At Savannah the reliable hours shift across the day: the morning is the most reliable time to be outdoors — reliably good about 44% of the block — while the evening (18–22) is the weakest. As the season turns, the evening holds best. A morning ceremony is the most reliable choice.
Share of each daytime block reliably good, week by week. For a specific date, Forelore resolves this to the half-hour — the Inside-the-Day audit.
Every guide names “the best month.” But a reliable window doesn’t end on a month boundary — it turns over inside the month, which is exactly where a monthly average misleads. We resolve it to the week — and, for a specific date, to the hour.
An average hides the year the heat or the rain showed up — the year an outdoor plan fails. Forelore reports the floor: the level of reliably-good outdoor time held in at least 24 of the last 25 years. It’s an audit of the observed record, not a forecast.
Get a free, date-specific reliability check — for Savannah or anywhere. We resolve your date to the hour and email you the read.
Check your date — free →The reliable window runs 15 Oct to 28 Apr, and the single most reliable two weeks are 30 Nov – 13 Dec (a floor of about 10 hours a day).
27 May to 15 Sep — the floor falls away and the limit is oppressive heat.
The morning — the most reliable block year-round (about 44% reliable) versus about 35% for the evening. A morning ceremony is the most reliable choice.
To the week, and to the hour of day — the edges fall inside the month, which is exactly where monthly averages mislead.
From 25 years of NASA GPM IMERG (rain) and Copernicus ERA5-HEAT UTCI (thermal) satellite record. A conservative floor held in at least 24 of the last 25 years — not a typical-year average, and not a forecast.