What is Port Chicago, CA, Weather Like in October?

During the month of October, Port Chicago, CA, has an average daytime high temperature of 79°F and an average overnight low temperature dropping to 53°F. Around 0.73 inches of precipitation is received during the month, with about 11.26 inches falling in a typical year. Snow is not common in Port Chicago, CA.

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October 2025: Actual vs. Average Temperatures

Showing temperatures through today (October 27, 2025)

Actual High Average High Actual Low Average Low

Month Summary
Average High: 73.7 F (-5.3 vs avg)
Average Low: 54.6 F (+1.4 vs avg)

Daytime temperatures were significantly below average.

Actual data from: KCCR

Port Chicago, CA Daily Weather Averages for October

Recorded at Concord Buchanan Fld (usw00023254), 3.1 miles SSW of Port Chicago, CA

Day	Avg Temps (°F)			Precip (in)		Snow (in)		Degree Days (°F)
Day	Low	High	Mean	Month	Year	Month	Year	Heat	Cool
10/1	56 F	82 F	69 F	0.01"	10.54"	N/A	N/A	0.5 F	4.6 F
10/2	56 F	82 F	69 F	0.03"	10.56"	N/A	N/A	0.6 F	4.4 F
10/3	55 F	82 F	69 F	0.04"	10.57"	N/A	N/A	0.6 F	4.3 F
10/4	55 F	82 F	68 F	0.05"	10.58"	N/A	N/A	0.7 F	4.1 F
10/5	55 F	82 F	68 F	0.07"	10.60"	N/A	N/A	0.8 F	4 F
10/6	55 F	81 F	68 F	0.08"	10.61"	N/A	N/A	0.9 F	3.9 F
10/7	55 F	81 F	68 F	0.10"	10.63"	N/A	N/A	0.9 F	3.7 F
10/8	54 F	81 F	68 F	0.11"	10.64"	N/A	N/A	1 F	3.6 F
10/9	54 F	81 F	67 F	0.13"	10.66"	N/A	N/A	1.1 F	3.4 F
10/10	54 F	80 F	67 F	0.15"	10.68"	N/A	N/A	1.2 F	3.2 F
10/11	54 F	80 F	67 F	0.16"	10.69"	N/A	N/A	1.2 F	3.1 F
10/12	54 F	80 F	67 F	0.18"	10.71"	N/A	N/A	1.3 F	2.9 F
10/13	53 F	79 F	66 F	0.20"	10.73"	N/A	N/A	1.4 F	2.7 F
10/14	53 F	79 F	66 F	0.23"	10.76"	N/A	N/A	1.5 F	2.5 F
10/15	53 F	79 F	66 F	0.25"	10.78"	N/A	N/A	1.6 F	2.4 F
10/16	53 F	78 F	66 F	0.27"	10.80"	N/A	N/A	1.7 F	2.3 F
10/17	53 F	78 F	65 F	0.30"	10.83"	N/A	N/A	1.8 F	2.1 F
10/18	52 F	78 F	65 F	0.32"	10.85"	N/A	N/A	2 F	2 F
10/19	52 F	77 F	65 F	0.35"	10.88"	N/A	N/A	2.1 F	1.9 F
10/20	52 F	77 F	64 F	0.38"	10.91"	N/A	N/A	2.3 F	1.7 F
10/21	52 F	77 F	64 F	0.41"	10.94"	N/A	N/A	2.4 F	1.5 F
10/22	51 F	76 F	64 F	0.43"	10.96"	N/A	N/A	2.5 F	1.4 F
10/23	51 F	76 F	64 F	0.46"	10.99"	N/A	N/A	2.7 F	1.2 F
10/24	51 F	76 F	63 F	0.50"	11.03"	N/A	N/A	2.9 F	1.1 F
10/25	51 F	75 F	63 F	0.53"	11.06"	N/A	N/A	3.1 F	1 F
10/26	50 F	75 F	63 F	0.56"	11.09"	N/A	N/A	3.3 F	0.9 F
10/27	50 F	74 F	62 F	0.60"	11.13"	N/A	N/A	3.6 F	0.8 F
10/28	50 F	74 F	62 F	0.63"	11.16"	N/A	N/A	3.8 F	0.8 F
10/29	50 F	74 F	62 F	0.66"	11.19"	N/A	N/A	4.1 F	0.7 F
10/30	49 F	73 F	61 F	0.70"	11.23"	N/A	N/A	4.4 F	0.6 F
10/31	49 F	73 F	61 F	0.73"	11.26"	N/A	N/A	4.6 F	0.5 F