January in Cardiff — the hardest end of the year
Hardest · 4.2/10January averages 5°C (41°F) — jacket weather. Comfortable for walking and museums, too cool for anything water-based.
Rainfall runs 74 mm, so plan one flexible day in three; you still get about 0 sunny days and 8.1 hours of daylight.
It scores 4.2/10 here, 10th of 12 months, against 9/10 in the destination's best month.
Expect mid-season pricing, and 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.
If your dates are flexible, June is materially better in Cardiff — 4.8 points higher on the same scale.
February in Cardiff — the hardest end of the year
Hardest · 4.3/10February averages 7°C (44°F) — jacket weather. Comfortable for walking and museums, too cool for anything water-based.
Rainfall runs 94 mm, so plan one flexible day in three; you still get about 0 sunny days and 9.6 hours of daylight.
It scores 4.3/10 here, 9th of 12 months, against 9/10 in the destination's best month.
Expect low-season pricing, and 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.
If your dates are flexible, June is materially better in Cardiff — 4.7 points higher on the same scale.
March in Cardiff — the hardest end of the year
Hardest · 4.8/10March averages 7°C (45°F) — jacket weather. Comfortable for walking and museums, too cool for anything water-based.
At 101 mm this is a genuinely wet month: about 3 sunny days in total, and outdoor plans need an indoor fallback.
It scores 4.8/10 here, 8th of 12 months, against 9/10 in the destination's best month.
Expect low-season pricing, and crowds are light for this destination.
Pack a mid-weight jacket, long sleeves and shoes you can walk 15 km in, a proper rain shell rather than an umbrella.
If your dates are flexible, June is materially better in Cardiff — 4.2 points higher on the same scale.
April in Cardiff — workable with trade-offs
Trade-offs · 6.8/10April averages 9°C (48°F) — jacket weather. Comfortable for walking and museums, too cool for anything water-based.
Rainfall runs 64 mm, so plan one flexible day in three; you still get about 12 sunny days and 13.6 hours of daylight.
It scores 6.8/10 here, 5th of 12 months, against 9/10 in the destination's best month.
Expect mid-season pricing, and crowds are moderate.
Pack a mid-weight jacket, long sleeves and shoes you can walk 15 km in, a packable rain layer.
If your dates are flexible, June is materially better in Cardiff — 2.2 points higher on the same scale.
May in Cardiff — reliably good (4th best month)
Good · 8/10May 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 71 mm, so plan one flexible day in three; you still get about 22 sunny days and 15.4 hours of daylight.
It scores 8/10 here, 4th of 12 months, against 9/10 in the destination's best month.
Expect mid-season pricing, and crowds are moderate.
Pack layers you can shed by midday plus one warm layer for the evening, a packable rain layer.
June in Cardiff — the year's strongest window
Best window · 9/10June averages 15°C (60°F), the range most people find easiest for walking a city all day without either overheating or losing daylight to weather.
Rainfall runs 49 mm, so plan one flexible day in three; you still get about 26 sunny days and 16.4 hours of daylight.
On our climate-comfort scale this is the top-ranked month of the year for Cardiff at 9/10 — the reference point every other month on this page is measured against.
Expect mid-season pricing, and crowds are moderate.
Pack layers you can shed by midday plus one warm layer for the evening, a packable rain layer.
July in Cardiff — reliably good (3rd best month)
Good · 8.2/10July averages 17°C (62°F), the range most people find easiest for walking a city all day without either overheating or losing daylight to weather.
Rainfall runs 77 mm, so plan one flexible day in three; you still get about 20 sunny days and 16 hours of daylight.
It scores 8.2/10 here, 3rd of 12 months, against 9/10 in the destination's best month.
Expect 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 layers you can shed by midday plus one warm layer for the evening, a packable rain layer.
August in Cardiff — the year's strongest window
Best window · 8.5/10August 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 54 mm, so plan one flexible day in three; you still get about 16 sunny days and 14.4 hours of daylight.
On our climate-comfort scale this is the top-ranked month of the year for Cardiff at 8.5/10 — the reference point every other month on this page is measured against.
Expect 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 layers you can shed by midday plus one warm layer for the evening, a packable rain layer.
September in Cardiff — workable with trade-offs
Trade-offs · 6.7/10September averages 15°C (60°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 6 sunny days and 12.4 hours of daylight.
It scores 6.7/10 here, 6th of 12 months, against 9/10 in the destination's best month.
Expect mid-season pricing, and crowds are moderate.
Pack layers you can shed by midday plus one warm layer for the evening, a packable rain layer.
If your dates are flexible, June is materially better in Cardiff — 2.3 points higher on the same scale.
October in Cardiff — workable with trade-offs
Trade-offs · 5.1/10October 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.
At 116 mm this is a genuinely wet month: about 0 sunny days in total, and outdoor plans need an indoor fallback.
It scores 5.1/10 here, 7th of 12 months, against 9/10 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 proper rain shell rather than an umbrella.
If your dates are flexible, June is materially better in Cardiff — 3.9 points higher on the same scale.
November in Cardiff — the hardest end of the year
Hardest · 4.1/10November averages 9°C (48°F) — jacket weather. Comfortable for walking and museums, too cool for anything water-based.
At 121 mm this is a genuinely wet month: about 0 sunny days in total, and outdoor plans need an indoor fallback.
It scores 4.1/10 here, 11th of 12 months, against 9/10 in the destination's best month.
Expect low-season pricing, and crowds are light for this destination.
Pack a mid-weight jacket, long sleeves and shoes you can walk 15 km in, a proper rain shell rather than an umbrella.
If your dates are flexible, June is materially better in Cardiff — 4.9 points higher on the same scale.
December in Cardiff — the hardest end of the year
Hardest · 3.6/10December averages 7°C (44°F) — jacket weather. Comfortable for walking and museums, too cool for anything water-based.
At 115 mm this is a genuinely wet month: about 0 sunny days in total, and outdoor plans need an indoor fallback.
It scores 3.6/10 here, 12th of 12 months, against 9/10 in the destination's best month.
Expect mid-season pricing, and crowds are light for this destination.
Pack a mid-weight jacket, long sleeves and shoes you can walk 15 km in, a proper rain shell rather than an umbrella.
If your dates are flexible, June is materially better in Cardiff — 5.4 points higher on the same scale.
