VacationSelector
The Outback, with the Tenmile Range in the distance, Keystone
KeystoneThe Outback, with the Tenmile Range in the distance
The Botanical Building, Balboa Park, San Diego
San DiegoThe Botanical Building, Balboa Park

Photos: Keystone by Rudi Riet, CC BY-SA 2.0, cropped; San Diego by Bernard Gagnon, CC BY-SA 3.0, cropped.

Keystone or San Diego?

Our verdict in twelve categories, each scored against the same fixed benchmark cities, and the climate month by month, so you can choose for your trip.

Choose Keystone for

  • nature and the outdoors
  • getting around

What lies behind each score is written up on Keystone’s own page.

Choose San Diego for

  • beaches
  • culture and sights
  • nightlife

What lies behind each score is written up on San Diego’s own page.

Scoreboard

Twelve categories on one fixed scale from 0 to 100. The shaded stretch is the gap between the two.

Beaches & swimming. Keystone 5, San Diego 72: San Diego leads by 67 points.
Food & drink. Keystone 27, San Diego 62: San Diego leads by 35 points.
Culture & sights. Keystone 7, San Diego 50: San Diego leads by 43 points.
Nightlife. Keystone 12, San Diego 48: San Diego leads by 36 points.
Nature & outdoors. Keystone 93, San Diego 77: Keystone leads by 16 points.
Day trips. Keystone 55, San Diego 60: San Diego leads by 5 points.
Good for families. Keystone 66, San Diego 96: San Diego leads by 30 points.
Getting around. Keystone 50, San Diego 38: Keystone leads by 12 points.
Shopping & style. Keystone 22, San Diego 44: San Diego leads by 22 points.
Affordability. Keystone 12, San Diego 26: San Diego leads by 14 points.
Live music & performing arts. Keystone 22, San Diego 56: San Diego leads by 34 points.
Wellness & relaxation. Keystone 32, San Diego 45: San Diego leads by 13 points.
0255075100

What lies behind each score is written up on the two cities’ own pages: Keystone and San Diego.

Your match

Pick a travel style or drag the sliders, and both match scores follow your weighting.

Keystone
34match

Wins on nature and the outdoors and getting around with your weighting.

San Diego
Best match
56match

Wins on beaches and culture and sights with your weighting.

What matters to you?

When should you go?

Pick your month. The climate figures are measured averages, not a forecast.

Keystone in July

21 °Cdaytime high
5 °Cnight-time low
39 mmrain in the month
No seasea
15 hdaylight a day

San Diego in July

24 °Cdaytime high
19 °Cnight-time low
2 mmrain in the month
20 °Csea
14 hdaylight a day

Daytime high, °C

-10°0°10°20°30°JFMAMJJASOND

Rainfall in the month, mm

0204060JFMAMJJASOND
KeystoneSan Diego

Where the figures come from

Keystone's temperatures are measured 51 km from the centre, at Leadville / Stringtown.

Keystone's station stands 232 m above the city centre, so the centre is likely a little warmer than the figures say.

Keystone has no rain gauge within 25 km of the centre, so its rainfall comes from a gridded climate dataset read at the city rather than from a gauge further away.

Temperature and rainfall are climate normals, averaged over the years shown. Keystone: 2006-2020 (rainfall 1991-2020) normals, Leadville / Stringtown (50.8 km from centre). San Diego: 1991-2020 normals, San Diego International Airport (2.8 km from centre).

Before you go

MeasureKeystoneSan Diego
CurrencyUS Dollar (USD)US Dollar (USD)
SocketsAB120 V, 60 HzAB120 V, 60 Hz
Driving sideRightRight
Time zoneUTC-7, UTC-6 in summerUTC-8, UTC-7 in summer
Emergency number911911
Elevation2,796 m129 m
Main airportDenver International Airport (DEN)116 km from centre231 non-stop destinationsSan Diego International Airport (SAN)3 km from centre87 non-stop destinations
Public holidays this year12 days13 days

By the numbers

MeasureKeystoneSan Diego
City population1,3691,386,932
People per km²131,438
Museums within 10 km026
UNESCO World Heritage sites within 50 km00
Swim season, months above 21 °C-1 month

Where else could you go?

Every comparison below shares a destination with this one, so you can follow Keystone or San Diego somewhere new.

Browse every destination

Sources

Structured data from Wikidata (CC0). Weather data by Meteostat. Meteorological data provided by NOAA, DWD and others. Rainfall where no rain gauge is within 25 km is from the TerraClimate 1991-2020 climatology (Abatzoglou et al. 2018, Scientific Data), read at the city. Airport data from OurAirports (public domain). Public holidays from Nager.Date (MIT). Exchange rates via Frankfurter, based on European Central Bank reference rates. Non-stop route lists from the "Airlines and destinations" tables on English Wikipedia airport articles, by Wikipedia contributors, reused under CC BY-SA 4.0. Currency from the ISO 4217 register maintained by SIX, cross-checked against country data from GeoNames (CC BY 4.0). Price level from World Bank open data (PPP conversion factor for private consumption and official exchange rate), CC BY 4.0. Time zones from GeoNames (CC BY 4.0); clock offsets computed from the IANA time zone database. Sea surface temperature from NOAA OISST v2.1, NOAA Physical Sciences Laboratory. Daylight hours computed from each destination's latitude using the NOAA solar position algorithm.

Category scores are our editorial verdict under rubric v3, each placed against the same fixed benchmark cities; the climate figures are measured. How the scores are set. Snapshot generated 2026-11-02. Daily budgets are estimates from country price levels.