January in Sintra — reliably good (9th best month)
Good · 7.2/10January averages 11°C (52°F) — jacket weather. Comfortable for walking and museums, too cool for anything water-based.
Rainfall runs 84 mm, so plan one flexible day in three; you still get about 26 days with 6+ hours of sunshine and 9.8 hours of daylight.
It scores 7.2/10 here, 9th of 12 months, against 9.7/10 in the destination's best month.
Figure on mid-season pricing, with crowds are light for this destination.
Pack a mid-weight jacket, long sleeves and shoes you can walk 15 km in, a packable rain layer.
Flexible dates? May scores 2.5 points higher here — enough to change the trip.
February in Sintra: strong conditions, 7th of 12
Good · 8.2/10February averages 12°C (54°F), the range most people find easiest for walking a city all day without either overheating or losing daylight to weather.
Rainfall runs 58 mm, so plan one flexible day in three; you still get about 24 days with 6+ hours of sunshine and 10.8 hours of daylight.
It scores 8.2/10 here, 7th of 12 months, against 9.7/10 in the destination's best month.
Figure on mid-season pricing, with crowds are moderate.
Pack layers you can shed by midday plus one warm layer for the evening, a packable rain layer.
Flexible dates? May scores 1.5 points higher here — enough to change the trip.
March holds up well in Sintra — 10th best month
Good · 7.2/10Temperatures hover around 13°C (55°F) — the kind of month where neither heat nor cold forces the schedule.
116 mm of rain makes this a wet month here, though with about 26 days with 6+ hours of sunshine there is still bright weather between the fronts.
That is 7.2/10 on the same scale — 10th of 12 months, versus 9.7/10 for the best month here.
Expect low-season pricing, and crowds are light for this destination.
Pack layers you can shed by midday plus one warm layer for the evening, a proper rain shell rather than an umbrella.
If your dates are flexible, May is materially better in Sintra — 2.5 points higher on the same scale.
April in Sintra — one of the year's strongest windows (4th)
Best window · 9.3/10April averages 15°C (58°F), the range most people find easiest for walking a city all day without either overheating or losing daylight to weather.
Expect 44 mm of rain — occasional showers rather than washed-out days — alongside about 28 days with 6+ hours of sunshine and 13.2 daylight hours.
A 9.3/10 puts this among the year's best months in Sintra (4th of 12); only May scores higher, at 9.7/10.
Plan for peak pricing, with crowds are moderate.
Pack layers you can shed by midday plus one warm layer for the evening.
May in Sintra — the year's strongest window
Best window · 9.7/10Temperatures hover around 17°C (62°F) — the kind of month where neither heat nor cold forces the schedule.
With around 25 mm of rain, any showers tend to pass through rather than settle in; about 30 days with 6+ hours of sunshine and 14.3 hours of daylight fill the rest.
On our climate-comfort scale this is the top-ranked month of the year for Sintra at 9.7/10 — the reference point every other month on this page is measured against.
Budget for peak pricing, and crowds are moderate. You are paying the year's highest rates for the year's best conditions — book early or shift a few weeks either side.
Pack layers you can shed by midday plus one warm layer for the evening.
June in Sintra — one of the year's strongest windows (5th)
Best window · 9/10June averages 18°C (65°F), the range most people find easiest for walking a city all day without either overheating or losing daylight to weather.
Rainfall runs 50 mm, so plan one flexible day in three; you still get about 29 days with 6+ hours of sunshine and 14.8 hours of daylight.
A 9/10 puts this among the year's best months in Sintra (5th of 12); only May scores higher, at 9.7/10.
Plan for mid-season pricing, with crowds are moderate.
Pack layers you can shed by midday plus one warm layer for the evening, a packable rain layer.
July ranks 2nd of 12 for Sintra — one of the best windows
Best window · 9.6/10July averages 20°C (69°F) — pleasant for mornings and evenings on foot in the city, with a midday break when the sun is strongest.
Rain is a non-issue at 3 mm for the month, with about 31 days with 6+ hours of sunshine and 14.6 hours of daylight to work with.
A 9.6/10 puts this among the year's best months in Sintra (2nd of 12); only May scores higher, at 9.7/10.
Figure on peak pricing, with this is one of the busiest months here. You are paying the year's highest rates for the year's best conditions — book early or shift a few weeks either side.
Pack light clothing, a hat and real sun protection.
August ranks 3rd of 12 for Sintra — one of the best windows
Best window · 9.6/10At 20°C (69°F) this is comfortable city weather in August, with sightseeing easiest before lunch and after the afternoon peak.
At just 1 mm for the month, rain will not shape your plans; you get about 31 days with 6+ hours of sunshine and 13.6 hours of daylight.
On our climate-comfort scale this is one of the strongest months of the year for Sintra at 9.6/10 (3rd of 12), just behind May at 9.7/10.
Budget for peak pricing, and this is one of the busiest months here. You are paying the year's highest rates for the year's best conditions — book early or shift a few weeks either side.
Pack light clothing, a hat and real sun protection.
September in Sintra — one of the year's strongest windows (6th)
Best window · 8.7/10At 19°C (66°F) this is comfortable city weather in September, with sightseeing easiest before lunch and after the afternoon peak.
Budget for roughly 61 mm of rain this month — a flexible day or two helps — with about 27 days with 6+ hours of sunshine and 12.4 hours of daylight to work around it.
On our climate-comfort scale this is one of the strongest months of the year for Sintra at 8.7/10 (6th of 12), just behind May at 9.7/10.
Expect mid-season pricing, and crowds are moderate.
Pack light clothing, a hat and real sun protection, a packable rain layer.
October in Sintra: strong conditions, 11th of 12
Good · 7.2/10October averages 18°C (65°F), the range most people find easiest for walking a city all day without either overheating or losing daylight to weather.
Monthly rainfall reaches 128 mm — wet for this destination — but about 22 days with 6+ hours of sunshine still break through, so keep one indoor fallback in the plan.
It scores 7.2/10 here, 11th of 12 months, against 9.7/10 in the destination's best month.
Plan for low-season pricing, with crowds are light for this destination.
Pack layers you can shed by midday plus one warm layer for the evening, a proper rain shell rather than an umbrella.
Flexible dates? May scores 2.5 points higher here — enough to change the trip.
November in Sintra — reliably good (8th best month)
Good · 7.4/10November averages 15°C (59°F), the range most people find easiest for walking a city all day without either overheating or losing daylight to weather.
Rainfall runs 96 mm, so plan one flexible day in three; you still get about 21 days with 6+ hours of sunshine and 10.1 hours of daylight.
It scores 7.4/10 here, 8th of 12 months, against 9.7/10 in the destination's best month.
Figure on low-season pricing, with crowds are light for this destination.
Pack layers you can shed by midday plus one warm layer for the evening, a packable rain layer.
Flexible dates? May scores 2.3 points higher here — enough to change the trip.
December in Sintra — workable with trade-offs
Trade-offs · 6.6/10Temperatures hover around 12°C (54°F) — the kind of month where neither heat nor cold forces the schedule.
112 mm of rain makes this a wet month here, though with about 23 days with 6+ hours of sunshine there is still bright weather between the fronts.
That is 6.6/10 on the same scale — 12th of 12 months, versus 9.7/10 for the best month here.
Expect low-season pricing, and crowds are light for this destination.
Pack layers you can shed by midday plus one warm layer for the evening, a proper rain shell rather than an umbrella.
If your dates are flexible, May is materially better in Sintra — 3.1 points higher on the same scale.
