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What is Mercerville, NJ, Weather Like in October?
During the month of October, Mercerville, NJ,
has an average daytime high temperature of 66°F and an average overnight low temperature dropping to 45°F.
Around 3.98 inches of precipitation is received during the month,
with about 39.85 inches falling in a typical year.
Snow is not common in Mercerville, NJ.
October 2025: Actual vs. Average Temperatures
Showing temperatures through today (October 19, 2025)
Actual High
Average High
Actual Low
Average Low
Actual data from: MID_D9142
Mercerville, NJ Daily Weather Averages for October
Recorded at Trenton State College
(usc00288880),
6 miles
WNW of
Mercerville, NJ
| Day | Avg Temps (°F) | Precip (in) | Snow (in) | Degree Days (°F) | |||||
|---|---|---|---|---|---|---|---|---|---|
| Low | High | Mean | Month | Year | Month | Year | Heat | Cool | |
| 10/1 | 50 F | 72 F | 61 F | 0.15" | 36.02" | N/A | N/A | 5.4 F | 1.3 F |
| 10/2 | 50 F | 72 F | 61 F | 0.28" | 36.15" | N/A | N/A | 5.7 F | 1.2 F |
| 10/3 | 49 F | 71 F | 60 F | 0.42" | 36.29" | N/A | N/A | 6 F | 1.1 F |
| 10/4 | 49 F | 71 F | 60 F | 0.55" | 36.42" | N/A | N/A | 6.3 F | 1 F |
| 10/5 | 48 F | 70 F | 59 F | 0.69" | 36.56" | N/A | N/A | 6.6 F | 0.9 F |
| 10/6 | 48 F | 70 F | 59 F | 0.83" | 36.70" | N/A | N/A | 7 F | 0.9 F |
| 10/7 | 48 F | 70 F | 59 F | 0.97" | 36.84" | N/A | N/A | 7.3 F | 0.8 F |
| 10/8 | 47 F | 69 F | 58 F | 1.11" | 36.98" | N/A | N/A | 7.6 F | 0.7 F |
| 10/9 | 47 F | 69 F | 58 F | 1.25" | 37.12" | N/A | N/A | 8 F | 0.7 F |
| 10/10 | 46 F | 68 F | 57 F | 1.37" | 37.24" | N/A | N/A | 8.3 F | 0.6 F |
| 10/11 | 46 F | 68 F | 57 F | 1.49" | 37.36" | N/A | N/A | 8.6 F | 0.5 F |
| 10/12 | 46 F | 68 F | 57 F | 1.60" | 37.47" | N/A | N/A | 8.8 F | 0.4 F |
| 10/13 | 45 F | 67 F | 56 F | 1.72" | 37.59" | N/A | N/A | 9.1 F | 0.3 F |
| 10/14 | 45 F | 67 F | 56 F | 1.84" | 37.71" | N/A | N/A | 9.4 F | 0.2 F |
| 10/15 | 45 F | 66 F | 56 F | 1.96" | 37.83" | N/A | N/A | 9.7 F | 0.2 F |
| 10/16 | 44 F | 66 F | 55 F | 2.09" | 37.96" | N/A | N/A | 10 F | 0.1 F |
| 10/17 | 44 F | 66 F | 55 F | 2.21" | 38.08" | N/A | N/A | 10.4 F | 0.1 F |
| 10/18 | 44 F | 65 F | 54 F | 2.34" | 38.21" | N/A | N/A | 10.7 F | 0.1 F |
| 10/19 | 43 F | 65 F | 54 F | 2.48" | 38.35" | N/A | N/A | 11 F | 0.1 F |
| 10/20 | 43 F | 65 F | 54 F | 2.61" | 38.48" | N/A | N/A | 11.4 F | 0.1 F |
| 10/21 | 43 F | 64 F | 53 F | 2.74" | 38.61" | N/A | N/A | 11.7 F | N/A |
| 10/22 | 42 F | 64 F | 53 F | 2.88" | 38.75" | N/A | N/A | 12 F | N/A |
| 10/23 | 42 F | 63 F | 53 F | 3.00" | 38.87" | N/A | N/A | 12.3 F | N/A |
| 10/24 | 42 F | 63 F | 52 F | 3.13" | 39.00" | N/A | N/A | 12.7 F | N/A |
| 10/25 | 41 F | 63 F | 52 F | 3.25" | 39.12" | N/A | N/A | 13 F | N/A |
| 10/26 | 41 F | 62 F | 52 F | 3.37" | 39.24" | N/A | N/A | 13.3 F | N/A |
| 10/27 | 41 F | 62 F | 51 F | 3.48" | 39.35" | N/A | N/A | 13.7 F | N/A |
| 10/28 | 40 F | 62 F | 51 F | 3.61" | 39.48" | N/A | N/A | 14 F | N/A |
| 10/29 | 40 F | 61 F | 51 F | 3.73" | 39.60" | N/A | N/A | 14.3 F | N/A |
| 10/30 | 40 F | 61 F | 50 F | 3.85" | 39.72" | N/A | N/A | 14.6 F | N/A |
| 10/31 | 40 F | 61 F | 50 F | 3.98" | 39.85" | N/A | N/A | 15 F | N/A |
Weather data provided by Xweather
