Weather Almanac: Diamond Bar, CA 91765

🗓️ Historical norms for July 2026

June August

Jan. Feb. Mar. Apr. May. Jun. Jul. Aug. Sep. Oct. Nov. Dec.

July avg. precipitation

🌧️ 0.01"

July days below freezing

📉 ≈0.0 days

Average July lows ≈62.1°F

USDA Zone

10a

Annual extreme lows 30°F to 35°F

Last Spring Frost (36°F)

🌷 Jan 31

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First Fall Frost (36°F)

🍂 Dec 20

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F: Forecast

H: Normal High Temp

L: Normal Low Temp

Sunday

Monday

Tuesday

Wednesday

Thursday

Friday

Saturday

Wed. July 1

🌅 5:43 a.m.

H: ≈83.5°F

L: ≈60.4°F

🌇 8:06 p.m.

Thu. July 2

🌅 5:44 a.m.

H: ≈83.7°F

L: ≈60.6°F

🌇 8:06 p.m.

Fri. July 3 Independence Day (observed)

🌅 5:44 a.m.

H: ≈84.0°F

L: ≈60.8°F

🌇 8:06 p.m.

Sat. July 4 Independence Day

🌅 5:45 a.m.

H: ≈84.2°F

L: ≈60.9°F

🌇 8:06 p.m.

Sun. July 5

🌅 5:45 a.m.

H: ≈84.4°F

L: ≈61.1°F

🌇 8:06 p.m.

Mon. July 6

🌅 5:46 a.m.

H: ≈84.6°F

L: ≈61.2°F

🌇 8:05 p.m.

Tue. July 7

🌅 5:46 a.m.

H: ≈84.8°F

L: ≈61.3°F

🌇 8:05 p.m.

Wed. July 8

🌅 5:47 a.m.

H: ≈85.0°F

L: ≈61.5°F

🌇 8:05 p.m.

Thu. July 9

🌅 5:47 a.m.

H: ≈85.2°F

L: ≈61.6°F

🌇 8:05 p.m.

Fri. July 10

🌅 5:48 a.m.

H: ≈85.4°F

L: ≈61.7°F

🌇 8:04 p.m.

Sat. July 11

🌅 5:48 a.m.

H: ≈85.5°F

L: ≈61.8°F

🌇 8:04 p.m.

Sun. July 12

🌅 5:49 a.m.

H: ≈85.7°F

L: ≈62.0°F

🌇 8:04 p.m.

Mon. July 13

🌅 5:50 a.m.

H: ≈85.8°F

L: ≈62.1°F

🌇 8:03 p.m.

Tue. July 14

🌅 5:50 a.m.

H: ≈86.0°F

L: ≈62.2°F

🌇 8:03 p.m.

Wed. July 15

🌅 5:51 a.m.

H: ≈86.1°F

L: ≈62.2°F

🌇 8:02 p.m.

Thu. July 16

🌅 5:51 a.m.

H: ≈86.3°F

L: ≈62.3°F

🌇 8:02 p.m.

Fri. July 17

🌅 5:52 a.m.

H: ≈86.4°F

L: ≈62.4°F

🌇 8:02 p.m.

Sat. July 18

🌅 5:53 a.m.

H: ≈86.5°F

L: ≈62.5°F

🌇 8:01 p.m.

Sun. July 19

🌅 5:53 a.m.

H: ≈86.6°F

L: ≈62.5°F

🌇 8:01 p.m.

Mon. July 20

🌅 5:54 a.m.

H: ≈86.7°F

L: ≈62.6°F

🌇 8:00 p.m.

Tue. July 21

🌅 5:55 a.m.

H: ≈86.8°F

L: ≈62.7°F

🌇 7:59 p.m.

Wed. July 22

🌅 5:55 a.m.

H: ≈86.9°F

L: ≈62.7°F

🌇 7:59 p.m.

Thu. July 23

🌅 5:56 a.m.

H: ≈87.0°F

L: ≈62.8°F

🌇 7:58 p.m.

Fri. July 24

🌅 5:57 a.m.

H: ≈87.1°F

L: ≈62.8°F

🌇 7:57 p.m.

Sat. July 25

🌅 5:57 a.m.

H: ≈87.2°F

L: ≈62.8°F

🌇 7:57 p.m.

Sun. July 26

🌅 5:58 a.m.

H: ≈87.3°F

L: ≈62.9°F

🌇 7:56 p.m.

Mon. July 27

🌅 5:59 a.m.

H: ≈87.3°F

L: ≈62.9°F

🌇 7:55 p.m.

Tue. July 28

🌅 6:00 a.m.

H: ≈87.4°F

L: ≈62.9°F

🌇 7:55 p.m.

Wed. July 29

🌅 6:00 a.m.

H: ≈87.5°F

L: ≈62.9°F

🌇 7:54 p.m.

Thu. July 30

🌅 6:01 a.m.

H: ≈87.5°F

L: ≈63.0°F

🌇 7:53 p.m.

Fri. July 31

🌅 6:02 a.m.

H: ≈87.6°F

L: ≈63.0°F

🌇 7:52 p.m.

June August

Jan. Feb. Mar. Apr. May. Jun. Jul. Aug. Sep. Oct. Nov. Dec.

Temperature climatic data from weather station: YORBA LINDA (USC00049847)

Precipitation climatic data from weather station: WALNUT NI FC102C (USC00049431)

Agricultural climatic data from weather station: ANAHEIM (USC00040192)