California, United States
Diamond Bar
Diamond Bar is a town in California, United States. It has a population of about 55,072 (2020). The climate is classified as hot-summer Mediterranean (Köppen Csa), with dry, sunny summers and mild, wetter winters.
Now58°F
Best timeApr–May · Nov
Population55,072
Local time08:18
34.03° N, 117.81° WElevation 696 ftUTC−7 · Pacific Daylight Time
Postal code91765October: high / low82° / 56°
Rain this month24mm
Best timeApr–May · Nov
Best: Apr–May · Nov. Warmth, sunshine and dry days, month by month.
Diamond Bar at a glance
Sunrise · sunset07:03 · 18:1011 h 07 min of daylightThe moon tonightWaxing gibbous85% · Moonrise 16:09Next holiday8 NovemberDiwaliNext eclipse17 Aug 2027Penumbral lunar eclipse
Best time to visitApr–May · Nov
The months with the highest weather score
Warmest month91°F
Average high in August
Coolest month44°F
Average low in December
Wettest monthFebruary
123 mm of rain
Driest monthJuly
2 mm of rain
Monuments nearby10+
within 13 km
Weather in Diamond Bar
Now and the next ten days. The 14 and 30-day outlooks are one click away.
58°F
Today hour by hourRain · wind 5 km/h · humidity 97%
Today22 Oct68°55°8 mm
Fri23 Oct72°53°
Sat24 Oct76°52°
Sun25 Oct80°55°
Mon26 Oct82°56°
Tue27 Oct81°54°
Wed28 Oct78°53°
Thu29 Oct77°55°
Fri30 Oct76°55°
When to go to Diamond Bar
Each month's weather score (warmth, sun, dry days) with its temperatures and rain.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Score | 89 | 84 | 89 | 94 | 95 | 85 | 69 | 66 | 71 | 85 | 93 | 87 |
| High | 68° | 69° | 72° | 75° | 78° | 83° | 89° | 91° | 89° | 82° | 74° | 68° |
| Low | 45° | 46° | 49° | 51° | 55° | 59° | 64° | 64° | 62° | 56° | 49° | 44° |
| Rain (mm) | 109 | 123 | 79 | 43 | 11 | 4 | 2 | 2 | 8 | 24 | 54 | 87 |
| Wet days | 5 | 6 | 5 | 3 | 1 | 0 | 1 | 1 | 1 | 2 | 3 | 5 |
What's on in Diamond Bar
Concerts, football matches, the public holidays ahead and the town's festivals through the year.
Monuments and museums in Diamond Bar
Outdoors around Diamond Bar
Hiking routes from the town, and what there is to do within 15 km: huts, viewpoints, climbing, camping, ski areas and dive sites.
Fairplex RV ParkCamp sites
1.3 kmBullwinkle'sTheme parks
1.6 kmThe Industry Hills Golf Club (Dwight D Eisenhower & Babe Zaharias)Golf courses
2 kmBonelli Bluffs RV Resort & CampgroundCamp sites · 1,112 ft
2.4 kmLos Serranos Golf & Country ClubGolf courses
5.1 kmMullins OverlookViewpoints
5.3 kmMt. Baldy ResortSki area · 15 km of pistes · 4 lifts
33 kmNature around Diamond Bar
Wildlife in October
The birds and mammals of United States seen most this month, compared with the rest of their year.
The sky over Diamond Bar
Earthquakes around Diamond Bar
The last 30 days within 300 km, and the record since 1950.
Last 30 days26magnitude 2.5+ within 300 kmSince 195069magnitude 5+ within 150 kmSignificant earthquakes on record55within 300 km
Strongest nearby since 1950
7.3Pioneertown 7 km ↗1992 · 128 km
6.7Hidden Hills 12 km ↗1994 · 70 km
6.6Agua Dulce 10 km ↙1971 · 67 km
6.3Big Bear Lake 9 km ↘1992 · 93 km
Towns and villages around Diamond Bar
Each with its own page: weather, climate and the best time to visit.
Walnut5.2 kmPomona6.1 kmEast San Gabriel Valley7.6 kmOtterbein8.2 kmSan Dimas8.7 kmSouth San Jose Hills8.9 kmCharter Oak8.9 kmLa Verne8.9 kmMarne9.2 kmCovina10 kmRowland Heights11 kmClaremont11 kmRowland11 kmCitrus12 kmWest Covina13 kmLa Puente13 kmGlendora13 kmIndustry14 kmLa Fetra14 kmOrange Avenue Junction14 kmIrwindale14 kmAzusa15 kmWest Puente Valley15 kmLa Habra Heights15 km
Diamond Bar from above
Around Diamond Bar37 places to see, do and reach nearby
Puddingstone ReservoirNature4.3 miArnold ReservoirNature2.9 miTemescal CreekNature14 miMorris Reservoir, CaliforniaNature11 miWalnut Creek (Southern California)Nature11 miSanta Anita CreekNature13 miMount San AntonioMountain20 miMount HarwoodMountain20 miMount Baden-PowellMountain23 miThroop PeakMountain22 miMount BurnhamMountain23 miTelegraph PeakMountain20 miMt. Baldy ResortSki area20 miScripps CollegeMonument7.7 miClaremontMonument7.0 miSan Dimas HotelMonument5.5 miPhillips MansionMonument2.1 miLa Puente Valley Woman's ClubMonument8.1 miLa Casa AlvaradoMonument4.4 miPomona City StablesMonument3.6 miYgnacio Palomares AdobeMonument5.8 miBenton Museum of ArtMuseum7.2 miRailGiants Train MuseumMuseum4.4 miWally Parks NHRA Motorsports MuseumMuseum4.4 miWorkman and Temple Family Homestead MuseumMuseum8.8 miRaymond M. Alf Museum of PaleontologyMuseum7.7 miIndustryStation2.5 miPomona–DowntownStation4.0 miPomona–NorthStation5.5 miFrontierland LandingFerry port16 miDavy Crocket's Explorer CanoesFerry port16 miAnaheimPlace15 miOntarioPlace9.4 miRancho CucamongaPlace14 miPomonaPlace3.8 miFullertonPlace13 miEl MontePlace13 mi
Postal code
91765
Getting to Diamond Bar
Ontario International AirportONT
20 kmLong Beach International AirportLGB
39 kmJohn Wayne Orange County International AirportSNA
40 kmIndustryRailway station
4 kmPomona–DowntownRailway station
6.4 kmPomona–NorthRailway station
8.9 kmFrontierland LandingFerry port
26 kmDavy Crocket's Explorer CanoesFrontierland
26 kmPlaces near Diamond Bar
Places with a climate like Diamond Bar
Matched month by month on temperature, rain and sunshine.
92% alikeLakeside
United States
82° / 55°Apr–May · Nov
91% alikeSantee
United States
81° / 55°Apr–Jun
91% alike
El Cajon
United States
81° / 55°Apr–Jun
91% alike
Winter Gardens
United States
81° / 55°Apr–May · Nov
92% alike
Granite Hills
United States
82° / 55°Apr–May · Nov
91% alike
Eucalyptus Hills
United States
82° / 54°Apr–May · Nov
Frequently asked questions
When is the best time to visit Diamond Bar?
Based on 30-year climate normals, April, May and November offer the best balance of comfortable temperatures, low rainfall and sunshine in Diamond Bar.
What is the hottest month in Diamond Bar?
August is the warmest month, with average highs of 91°F and lows of 64°F.
What is the coldest month in Diamond Bar?
December is the coldest month, with average highs of 68°F and lows of 44°F.
What is the rainiest month in Diamond Bar?
February is the wettest month with about 4.8 in of precipitation on 6 wet days.
What is the postal code of Diamond Bar?
The postal code of Diamond Bar is 91765.