January in Koper — reliably good (3rd best month)
Good · 7.8/10January 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 95 mm, so plan one flexible day in three; you still get about 19 sunny days and 9.8 hours of daylight.
It scores 7.8/10 here, 3rd of 12 months, against 9.1/10 in the destination's best month.
Expect mid-season pricing, and crowds are light for this destination.
Pack layers you can shed by midday plus one warm layer for the evening, a packable rain layer.
February in Koper — reliably good (4th best month)
Good · 7.8/10February averages 13°C (55°F), the range most people find easiest for walking a city all day without either overheating or losing daylight to weather.
Rainfall runs 95 mm, so plan one flexible day in three; you still get about 19 sunny days and 10.8 hours of daylight.
It scores 7.8/10 here, 4th of 12 months, against 9.1/10 in the destination's best month.
Expect low-season pricing, and crowds are light for this destination. That combination — decent conditions at the lowest rates of the year — is the best value window on this page.
Pack layers you can shed by midday plus one warm layer for the evening, a packable rain layer.
March in Koper — reliably good (5th best month)
Good · 7.8/10March averages 16°C (61°F), the range most people find easiest for walking a city all day without either overheating or losing daylight to weather.
Rainfall runs 95 mm, so plan one flexible day in three; you still get about 19 sunny days and 12 hours of daylight.
It scores 7.8/10 here, 5th of 12 months, against 9.1/10 in the destination's best month.
Expect low-season pricing, and crowds are light for this destination. That combination — decent conditions at the lowest rates of the year — is the best value window on this page.
Pack layers you can shed by midday plus one warm layer for the evening, a packable rain layer.
April in Koper — reliably good (6th best month)
Good · 7.8/10April averages 20°C (68°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.
Rainfall runs 95 mm, so plan one flexible day in three; you still get about 19 sunny days and 13.3 hours of daylight.
It scores 7.8/10 here, 6th of 12 months, against 9.1/10 in the destination's best month.
Expect low-season pricing, and crowds are light for this destination. That combination — decent conditions at the lowest rates of the year — is the best value window on this page.
Pack light clothing, swimwear and real sun protection, a packable rain layer.
May in Koper — the year's strongest window
Best window · 9.1/10May averages 24°C (75°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.
Rainfall runs 75 mm, so plan one flexible day in three; you still get about 20 sunny days and 14.2 hours of daylight.
On our climate-comfort scale this is the top-ranked month of the year for Koper at 9.1/10 — the reference point every other month on this page is measured against.
Expect mid-season pricing, and crowds are moderate.
Pack light clothing, swimwear and real sun protection, a packable rain layer.
June in Koper — reliably good (7th best month)
Good · 7.8/10June averages 27°C (81°F), so the practical pattern is early mornings, a long midday break, and evenings back outside.
Rainfall runs 75 mm, so plan one flexible day in three; you still get about 20 sunny days and 14.5 hours of daylight.
It scores 7.8/10 here, 7th of 12 months, against 9.1/10 in the destination's best month.
Expect low-season pricing, and crowds are light for this destination.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a packable rain layer.
July in Koper — reliably good (8th best month)
Good · 7.8/10July averages 29°C (84°F), so the practical pattern is early mornings, a long midday break, and evenings back outside.
Rainfall runs 75 mm, so plan one flexible day in three; you still get about 20 sunny days and 14.2 hours of daylight.
It scores 7.8/10 here, 8th of 12 months, against 9.1/10 in the destination's best month.
Expect low-season pricing, and crowds are light for this destination.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a packable rain layer.
August in Koper — reliably good (9th best month)
Good · 7.8/10August averages 28°C (82°F), so the practical pattern is early mornings, a long midday break, and evenings back outside.
Rainfall runs 75 mm, so plan one flexible day in three; you still get about 20 sunny days and 13.3 hours of daylight.
It scores 7.8/10 here, 9th of 12 months, against 9.1/10 in the destination's best month.
Expect low-season pricing, and crowds are light for this destination.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a packable rain layer.
September in Koper — the year's strongest window
Best window · 9.1/10September averages 25°C (77°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.
Rainfall runs 75 mm, so plan one flexible day in three; you still get about 20 sunny days and 12 hours of daylight.
On our climate-comfort scale this is the top-ranked month of the year for Koper at 9.1/10 — the reference point every other month on this page is measured against.
Expect mid-season pricing, and crowds are moderate.
Pack light clothing, swimwear and real sun protection, a packable rain layer.
October in Koper — reliably good (10th best month)
Good · 7.8/10October averages 21°C (70°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.
Rainfall runs 95 mm, so plan one flexible day in three; you still get about 19 sunny days and 10.8 hours of daylight.
It scores 7.8/10 here, 10th of 12 months, against 9.1/10 in the destination's best month.
Expect low-season pricing, and crowds are light for this destination.
Pack light clothing, swimwear and real sun protection, a packable rain layer.
November in Koper — reliably good (11th best month)
Good · 7.8/10November averages 17°C (63°F), the range most people find easiest for walking a city all day without either overheating or losing daylight to weather.
Rainfall runs 95 mm, so plan one flexible day in three; you still get about 19 sunny days and 9.8 hours of daylight.
It scores 7.8/10 here, 11th of 12 months, against 9.1/10 in the destination's best month.
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 packable rain layer.
December in Koper — reliably good (12th best month)
Good · 7.8/10December averages 14°C (57°F), the range most people find easiest for walking a city all day without either overheating or losing daylight to weather.
Rainfall runs 95 mm, so plan one flexible day in three; you still get about 19 sunny days and 9.5 hours of daylight.
It scores 7.8/10 here, 12th of 12 months, against 9.1/10 in the destination's best month.
Expect mid-season pricing, and crowds are light for this destination.
Pack layers you can shed by midday plus one warm layer for the evening, a packable rain layer.
