January holds up well in San Diego — 11th best month
Good · 8.1/10January 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 73 mm, so plan one flexible day in three; you still get about 28 days with 6+ hours of sunshine and 10.3 hours of daylight.
It scores 8.1/10 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 packable rain layer.
Flexible dates? April scores 1.6 points higher here — enough to change the trip.
February in San Diego — one of the year's strongest windows (10th)
Best window · 8.6/10February 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 54 mm, so plan one flexible day in three; you still get about 25 days with 6+ hours of sunshine and 11 hours of daylight.
A 8.6/10 puts this among the year's best months in San Diego (10th of 12); only April 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.
March in San Diego: strong conditions, 12th of 12
Good · 8/10Temperatures hover around 13°C (56°F) — the kind of month where neither heat nor cold forces the schedule.
Budget for roughly 85 mm of rain this month — a flexible day or two helps — with about 28 days with 6+ hours of sunshine and 12 hours of daylight to work around it.
That is 8/10 on the same scale — 12th of 12 months, versus 9.7/10 for the best month here.
Budget for 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.
If your dates are flexible, April is materially better in San Diego — 1.7 points higher on the same scale.
April in San Diego — the year's strongest window
Best window · 9.7/10April 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.
Rain is a non-issue at 8 mm for the month, with about 29 days with 6+ hours of sunshine and 13 hours of daylight to work with.
On our climate-comfort scale this is the top-ranked month of the year for San Diego at 9.7/10 — the reference point every other month on this page is measured against.
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 layers you can shed by midday plus one warm layer for the evening.
May is one of the strongest months in San Diego (2nd)
Best window · 9.7/10Temperatures hover around 17°C (62°F) — the kind of month where neither heat nor cold forces the schedule.
At just 6 mm for the month, rain will not shape your plans; you get about 30 days with 6+ hours of sunshine and 13.8 hours of daylight.
On our climate-comfort scale this is one of the strongest months of the year for San Diego at 9.7/10 (2nd of 12), just behind April at 9.7/10.
Expect 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 is one of the strongest months in San Diego (3rd)
Best window · 9.6/10June averages 19°C (65°F), the range most people find easiest for walking a city all day without either overheating or losing daylight to weather.
Rain is a non-issue at 3 mm for the month, with about 29 days with 6+ hours of sunshine and 14.3 hours of daylight to work with.
A 9.6/10 puts this among the year's best months in San Diego (3rd of 12); only April scores higher, at 9.7/10.
Figure on mid-season pricing, with crowds are moderate.
Pack layers you can shed by midday plus one warm layer for the evening.
July is one of the strongest months in San Diego (4th)
Best window · 9.6/10July averages 21°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 4 mm for the month, with about 31 days with 6+ hours of sunshine and 14.1 hours of daylight to work with.
A 9.6/10 puts this among the year's best months in San Diego (4th of 12); only April scores higher, at 9.7/10.
Plan for peak pricing, with this is one of the busiest months here.
Pack light clothing, a hat and real sun protection.
August ranks 5th of 12 for San Diego — one of the best windows
Best window · 9.6/10At 22°C (71°F) this is comfortable city weather in August, with sightseeing easiest before lunch and after the afternoon peak.
At just 13 mm for the month, rain will not shape your plans; you get about 30 days with 6+ hours of sunshine and 13.3 hours of daylight.
On our climate-comfort scale this is one of the strongest months of the year for San Diego at 9.6/10 (5th of 12), just behind April at 9.7/10.
Expect peak pricing, and this is one of the busiest months here.
Pack light clothing, a hat and real sun protection.
September is one of the strongest months in San Diego (6th)
Best window · 9.5/10At 21°C (70°F) this is comfortable city weather in September, with sightseeing easiest before lunch and after the afternoon peak.
With around 24 mm of rain, any showers tend to pass through rather than settle in; about 29 days with 6+ hours of sunshine and 12.4 hours of daylight fill the rest.
On our climate-comfort scale this is one of the strongest months of the year for San Diego at 9.5/10 (6th of 12), just behind April at 9.7/10.
Budget for mid-season pricing, and crowds are moderate.
Pack light clothing, a hat and real sun protection.
October in San Diego — one of the year's strongest windows (7th)
Best window · 9.5/10October averages 19°C (66°F), the range most people find easiest for walking a city all day without either overheating or losing daylight to weather.
Expect 18 mm of rain — occasional showers rather than washed-out days — alongside about 29 days with 6+ hours of sunshine and 11.4 daylight hours.
A 9.5/10 puts this among the year's best months in San Diego (7th of 12); only April scores higher, at 9.7/10.
Figure on mid-season pricing, with crowds are moderate.
Pack layers you can shed by midday plus one warm layer for the evening.
November is one of the strongest months in San Diego (8th)
Best window · 9.4/10November averages 16°C (60°F), the range most people find easiest for walking a city all day without either overheating or losing daylight to weather.
Expect 40 mm of rain — occasional showers rather than washed-out days — alongside about 28 days with 6+ hours of sunshine and 10.5 daylight hours.
A 9.4/10 puts this among the year's best months in San Diego (8th of 12); only April 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.
December is one of the strongest months in San Diego (9th)
Best window · 8.8/10Temperatures hover around 13°C (56°F) — the kind of month where neither heat nor cold forces the schedule.
With around 40 mm of rain, any showers tend to pass through rather than settle in; about 26 days with 6+ hours of sunshine and 10 hours of daylight fill the rest.
On our climate-comfort scale this is one of the strongest months of the year for San Diego at 8.8/10 (9th of 12), just behind April at 9.7/10.
Budget for mid-season pricing, and crowds are moderate.
Pack layers you can shed by midday plus one warm layer for the evening.
