Weather Almanac: Simi Valley, CA 93065

🗓️ Historical norms for September 2025

September avg. precipitation
🌧️ 0.16"
September days below freezing
📉 ≈0.0 days
Average September lows ≈57.7°F
USDA Zone
10a
Annual extreme lows 30°F to 35°F
Last Spring Frost (36°F)
🌷 Apr 12
First Fall Frost (36°F)
🍂 Nov 9
Mon. September 1 Labor Day  

🌅 6:28 a.m.

H: ≈85.1°F

L: ≈58.5°F

🌇 7:20 p.m.

Tue. September 2  

🌅 6:29 a.m.

H: ≈85.1°F

L: ≈58.5°F

🌇 7:19 p.m.

Wed. September 3  

🌅 6:30 a.m.

H: ≈85.0°F

L: ≈58.5°F

🌇 7:17 p.m.

Thu. September 4  

🌅 6:30 a.m.

H: ≈85.0°F

L: ≈58.5°F

🌇 7:16 p.m.

Fri. September 5  

🌅 6:31 a.m.

H: ≈84.9°F

L: ≈58.6°F

🌇 7:15 p.m.

Sat. September 6  

🌅 6:32 a.m.

H: ≈84.8°F

L: ≈58.6°F

🌇 7:13 p.m.

Sun. September 7 🌕

🌅 6:32 a.m.

H: ≈84.7°F

L: ≈58.5°F

🌇 7:12 p.m.

Mon. September 8  

🌅 6:33 a.m.

H: ≈84.6°F

L: ≈58.5°F

🌇 7:10 p.m.

Tue. September 9  

🌅 6:34 a.m.

H: ≈84.5°F

L: ≈58.5°F

🌇 7:09 p.m.

Wed. September 10  

🌅 6:35 a.m.

H: ≈84.4°F

L: ≈58.5°F

🌇 7:08 p.m.

Thu. September 11  

🌅 6:35 a.m.

H: ≈84.2°F

L: ≈58.4°F

🌇 7:06 p.m.

Fri. September 12  

🌅 6:36 a.m.

H: ≈84.1°F

L: ≈58.3°F

🌇 7:05 p.m.

Sat. September 13  

🌅 6:37 a.m.

H: ≈83.9°F

L: ≈58.3°F

🌇 7:03 p.m.

Sun. September 14 Holy Cross 🌗

🌅 6:37 a.m.

H: ≈83.7°F

L: ≈58.2°F

🌇 7:02 p.m.

Mon. September 15  

🌅 6:38 a.m.

H: ≈83.5°F

L: ≈58.1°F

🌇 7:01 p.m.

Tue. September 16  

🌅 6:39 a.m.

H: ≈83.3°F

L: ≈58.0°F

🌇 6:59 p.m.

Wed. September 17  

🌅 6:39 a.m.

H: ≈83.1°F

L: ≈57.9°F

🌇 6:58 p.m.

Thu. September 18  

🌅 6:40 a.m.

H: ≈82.9°F

L: ≈57.8°F

🌇 6:56 p.m.

Fri. September 19  

🌅 6:41 a.m.

H: ≈82.7°F

L: ≈57.6°F

🌇 6:55 p.m.

Sat. September 20  

🌅 6:42 a.m.

H: ≈82.4°F

L: ≈57.5°F

🌇 6:54 p.m.

Sun. September 21 🌑

🌅 6:42 a.m.

H: ≈82.2°F

L: ≈57.3°F

🌇 6:52 p.m.

Mon. September 22 Autumn Equinox  

🌅 6:43 a.m.

H: ≈81.9°F

L: ≈57.2°F

🌇 6:51 p.m.

Tue. September 23  

🌅 6:44 a.m.

H: ≈81.7°F

L: ≈57.0°F

🌇 6:49 p.m.

Wed. September 24  

🌅 6:44 a.m.

H: ≈81.5°F

L: ≈56.9°F

🌇 6:48 p.m.

Thu. September 25  

🌅 6:45 a.m.

H: ≈81.2°F

L: ≈56.7°F

🌇 6:46 p.m.

Fri. September 26  

🌅 6:46 a.m.

H: ≈81.0°F

L: ≈56.5°F

🌇 6:45 p.m.

Sat. September 27  

🌅 6:47 a.m.

H: ≈80.7°F

L: ≈56.3°F

🌇 6:44 p.m.

Sun. September 28  

🌅 6:47 a.m.

H: ≈80.5°F

L: ≈56.1°F

🌇 6:42 p.m.

Mon. September 29 🌓

🌅 6:48 a.m.

H: ≈80.2°F

L: ≈56.0°F

🌇 6:41 p.m.

Tue. September 30  

🌅 6:49 a.m.

H: ≈80.0°F

L: ≈55.8°F

🌇 6:40 p.m.


Temperature climatic data from weather station: THOUSAND OAKS 1 SW (USC00048904)

Precipitation climatic data from weather station: PIRU 2 ESE (USC00046940)

Agricultural climatic data from weather station: CANOGA PARK PIERCE CLG (USC00041484)