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What is Oceanside Harbor, CA, Weather Like in October?

During the month of October, Oceanside Harbor, CA, has an average daytime high temperature of 70°F and an average overnight low temperature dropping to 58°F. Around 0.57 inches of precipitation is received during the month, with about 7.94 inches falling in a typical year. Snow is not common in Oceanside Harbor, CA.

October 2025: Actual vs. Average Temperatures

Showing temperatures through today (October 25, 2025)
Actual High Average High Actual Low Average Low

Month Summary
Average High: 68.5 F (-1.2 vs avg)
Average Low: 56.5 F (-2.5 vs avg)

Actual data from: MID_E3174

Oceanside Harbor, CA Daily Weather Averages for October

Recorded at Oceanside Marina (usc00046377), 0.1 miles N of Oceanside Harbor, CA
Day Avg Temps (°F) Precip (in) Snow (in) Degree Days (°F)
Low High Mean Month Year Month Year Heat Cool
10/1 61 F 70 F 66 F 0.01" 7.38" 0.00" 0.00" 0.9 F 1.7 F
10/2 61 F 70 F 66 F 0.01" 7.38" 0.00" 0.00" 1 F 1.6 F
10/3 61 F 70 F 66 F 0.02" 7.39" 0.00" 0.00" 1 F 1.6 F
10/4 61 F 70 F 65 F 0.03" 7.40" 0.00" 0.00" 1.1 F 1.6 F
10/5 61 F 70 F 65 F 0.05" 7.42" 0.00" 0.00" 1.2 F 1.5 F
10/6 60 F 70 F 65 F 0.06" 7.43" 0.00" 0.00" 1.3 F 1.4 F
10/7 60 F 70 F 65 F 0.07" 7.44" 0.00" 0.00" 1.3 F 1.4 F
10/8 60 F 70 F 65 F 0.09" 7.46" 0.00" 0.00" 1.4 F 1.3 F
10/9 60 F 70 F 65 F 0.10" 7.47" 0.00" 0.00" 1.5 F 1.3 F
10/10 60 F 70 F 65 F 0.12" 7.49" 0.00" 0.00" 1.6 F 1.2 F
10/11 59 F 70 F 65 F 0.13" 7.50" 0.00" 0.00" 1.7 F 1.2 F
10/12 59 F 70 F 64 F 0.15" 7.52" 0.00" 0.00" 1.7 F 1.1 F
10/13 59 F 70 F 64 F 0.17" 7.54" 0.00" 0.00" 1.8 F 1.1 F
10/14 59 F 70 F 64 F 0.19" 7.56" 0.00" 0.00" 1.9 F 1 F
10/15 58 F 70 F 64 F 0.20" 7.57" 0.00" 0.00" 2 F 1 F
10/16 58 F 70 F 64 F 0.22" 7.59" 0.00" 0.00" 2.1 F 1 F
10/17 58 F 70 F 64 F 0.25" 7.62" 0.00" 0.00" 2.2 F 0.9 F
10/18 58 F 69 F 64 F 0.27" 7.64" 0.00" 0.00" 2.3 F 0.9 F
10/19 58 F 69 F 64 F 0.29" 7.66" 0.00" 0.00" 2.4 F 0.8 F
10/20 57 F 69 F 63 F 0.31" 7.68" 0.00" 0.00" 2.5 F 0.8 F
10/21 57 F 69 F 63 F 0.33" 7.70" 0.00" 0.00" 2.6 F 0.8 F
10/22 57 F 69 F 63 F 0.36" 7.73" 0.00" 0.00" 2.7 F 0.7 F
10/23 57 F 69 F 63 F 0.38" 7.75" 0.00" 0.00" 2.8 F 0.7 F
10/24 57 F 69 F 63 F 0.40" 7.77" 0.00" 0.00" 2.8 F 0.7 F
10/25 56 F 69 F 63 F 0.42" 7.79" 0.00" 0.00" 2.9 F 0.6 F
10/26 56 F 69 F 63 F 0.45" 7.82" 0.00" 0.00" 3.1 F 0.6 F
10/27 56 F 69 F 62 F 0.47" 7.84" 0.00" 0.00" 3.2 F 0.6 F
10/28 56 F 69 F 62 F 0.49" 7.86" 0.00" 0.00" 3.3 F 0.6 F
10/29 56 F 69 F 62 F 0.52" 7.89" 0.00" 0.00" 3.5 F 0.6 F
10/30 55 F 69 F 62 F 0.54" 7.91" 0.00" 0.00" 3.6 F 0.6 F
10/31 55 F 69 F 62 F 0.57" 7.94" 0.00" 0.00" 3.7 F 0.5 F