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What is Half Moon Bay, CA, Weather Like in October?
During the month of October, Half Moon Bay, CA,
has an average daytime high temperature of 67°F and an average overnight low temperature dropping to 48°F.
Around 1.26 inches of precipitation is received during the month,
with about 18.44 inches falling in a typical year.
Snow is not common in Half Moon Bay, 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: 66.3 F
(-0.5 vs avg)
Average Low: 51.8 F
(+3.5 vs avg)
Nighttime temperatures were significantly above average.
Actual data from: MID_G4019
Half Moon Bay, CA Daily Weather Averages for October
Recorded at Half Moon Bay
(usc00043714),
1 miles
NW of
Half Moon Bay, CA
| Day | Avg Temps (°F) | Precip (in) | Snow (in) | Degree Days (°F) | |||||
|---|---|---|---|---|---|---|---|---|---|
| Low | High | Mean | Month | Year | Month | Year | Heat | Cool | |
| 10/1 | 50 F | 67 F | 58 F | 0.02" | 17.20" | 0.00" | 0.00" | 7 F | 0.1 F |
| 10/2 | 49 F | 67 F | 58 F | 0.04" | 17.22" | 0.00" | 0.00" | 7 F | 0.1 F |
| 10/3 | 49 F | 67 F | 58 F | 0.07" | 17.25" | 0.00" | 0.00" | 7.1 F | 0.1 F |
| 10/4 | 49 F | 67 F | 58 F | 0.09" | 17.27" | 0.00" | 0.00" | 7.1 F | 0.1 F |
| 10/5 | 49 F | 67 F | 58 F | 0.12" | 17.30" | 0.00" | 0.00" | 7.2 F | 0.1 F |
| 10/6 | 49 F | 67 F | 58 F | 0.14" | 17.32" | 0.00" | 0.00" | 7.3 F | 0.1 F |
| 10/7 | 49 F | 67 F | 58 F | 0.17" | 17.35" | 0.00" | 0.00" | 7.3 F | 0.1 F |
| 10/8 | 49 F | 67 F | 58 F | 0.20" | 17.38" | 0.00" | 0.00" | 7.4 F | 0.2 F |
| 10/9 | 49 F | 67 F | 58 F | 0.23" | 17.41" | 0.00" | 0.00" | 7.5 F | 0.2 F |
| 10/10 | 49 F | 67 F | 58 F | 0.26" | 17.44" | 0.00" | 0.00" | 7.5 F | 0.2 F |
| 10/11 | 48 F | 67 F | 58 F | 0.29" | 17.47" | 0.00" | 0.00" | 7.6 F | 0.1 F |
| 10/12 | 48 F | 67 F | 58 F | 0.33" | 17.51" | 0.00" | 0.00" | 7.6 F | 0.2 F |
| 10/13 | 48 F | 67 F | 58 F | 0.36" | 17.54" | 0.00" | 0.00" | 7.7 F | 0.2 F |
| 10/14 | 48 F | 67 F | 57 F | 0.40" | 17.58" | 0.00" | 0.00" | 7.8 F | 0.2 F |
| 10/15 | 48 F | 67 F | 57 F | 0.45" | 17.63" | 0.00" | 0.00" | 7.8 F | 0.1 F |
| 10/16 | 48 F | 67 F | 57 F | 0.49" | 17.67" | 0.00" | 0.00" | 7.9 F | 0.1 F |
| 10/17 | 48 F | 67 F | 57 F | 0.53" | 17.71" | 0.00" | 0.00" | 8 F | 0.2 F |
| 10/18 | 48 F | 67 F | 57 F | 0.58" | 17.76" | 0.00" | 0.00" | 8.1 F | 0.2 F |
| 10/19 | 48 F | 67 F | 57 F | 0.63" | 17.81" | 0.00" | 0.00" | 8.2 F | 0.2 F |
| 10/20 | 48 F | 66 F | 57 F | 0.68" | 17.86" | 0.00" | 0.00" | 8.3 F | 0.2 F |
| 10/21 | 47 F | 66 F | 57 F | 0.73" | 17.91" | 0.00" | 0.00" | 8.4 F | 0.2 F |
| 10/22 | 47 F | 66 F | 57 F | 0.78" | 17.96" | 0.00" | 0.00" | 8.5 F | 0.2 F |
| 10/23 | 47 F | 66 F | 57 F | 0.83" | 18.01" | 0.00" | 0.00" | 8.5 F | 0.2 F |
| 10/24 | 47 F | 66 F | 57 F | 0.88" | 18.06" | 0.00" | 0.00" | 8.6 F | 0.2 F |
| 10/25 | 47 F | 66 F | 57 F | 0.93" | 18.11" | 0.00" | 0.00" | 8.7 F | 0.2 F |
| 10/26 | 47 F | 66 F | 56 F | 0.99" | 18.17" | 0.00" | 0.00" | 8.8 F | 0.2 F |
| 10/27 | 47 F | 66 F | 56 F | 1.04" | 18.22" | 0.00" | 0.00" | 8.9 F | 0.2 F |
| 10/28 | 47 F | 66 F | 56 F | 1.10" | 18.28" | 0.00" | 0.00" | 9 F | 0.2 F |
| 10/29 | 47 F | 66 F | 56 F | 1.15" | 18.33" | 0.00" | 0.00" | 9.1 F | 0.2 F |
| 10/30 | 47 F | 65 F | 56 F | 1.21" | 18.39" | 0.00" | 0.00" | 9.2 F | 0.2 F |
| 10/31 | 46 F | 65 F | 56 F | 1.26" | 18.44" | 0.00" | 0.00" | 9.3 F | 0.2 F |
