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SunnyDays

ERA5 almanac — 8 years of real data

Singapore in October

Singapore in October: 86% of days see measurable rain, 86°F average high, 3% of days historically clear (n=248, ERA5 2018–2025).

Singapore in October is historically a poor month for sun: only 3% of days clear across 8 years (n=248, avg high 86°F). February is the clearest month for Singapore 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 Singapore 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 October

Clear-sky percentage for Singapore in October, split by half-month. “n” is the number of days sampled across 8 years (2018–2025).
Period % Clear days Sample (n) Avg high
Early October
1st–15th		 3% n=120 86°F
Late October
16th–end		 3% n=128 86°F
Full month average 3% n=248 86°F

Sunshine & warmth in October

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 Singapore in October. Primary: % of days ≥ 72°F with > 6 h of sunshine.
Period Warm & sunny (≥72°F, >6 h sun) Sample (n)
Early October
1st–15th		 86% n=120
Late October
16th–end		 85% n=128
Full month average 85% n=248
10.1 h median sunshine per day 71% of days exceed 8 h sunshine 86% of days see ≥ 1 mm rain — rain is not hidden
Comparison (old vs new): WMO-code “clear” bar: 3%. Sunshine-based “warm & sunny”: 85%. The 82-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

Singapore is historically almost never clear in October: only 3% of days meet the clear bar across 8 years (n=248). Come back in February if you want clear skies here. Plan entirely around indoor or overcast-friendly activities.

→ See all destinations in February — historically the best month for sun in Singapore.

Every month in Singapore

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

Historical clear-sky % for Singapore, all months, ERA5 2018–2025.
Month % Clear Sample (n)
January 4% n=248 All destinations →
February 10% n=226 All destinations →
March 6% n=248 All destinations →
April 2% n=240 All destinations →
May 3% n=248 All destinations →
June 4% n=240 All destinations →
July 3% n=248 All destinations →
August 2% n=248 All destinations →
September 6% n=240 All destinations →
October ← this page 3% n=248 All destinations →
November 1% n=240 All destinations →
December 1% n=248 All destinations →

Frequently asked

Does it rain in Singapore in October?

Yes, frequently. In Singapore, 86% of days in October see measurable rain, based on 8 years of ERA5 historical data (n=248 days, 2018–2025). This is a historical average, not a forecast.

Is Singapore good for sun in October?

Not usually. Singapore is historically overcast in October: only 3% of days are clear (avg high 86°F, n=248 days, ERA5 2018–2025). February is historically far better for sun here.

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.