Mercer County (Princeton)
October
Weather in Mercer County for October 2025
Your guide to Mercer County weather in October - trends and predictions
In general, the average temperature in Mercer County at the beginning of October is 20.6 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 16.6 °F by the end of October.
With an average of 2 rainy days, Mercer County experiences minimal rainfall in October.
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Temperatures
Rain 🌧️
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29
Dry days
2
Rainy days
0
Snow days
19°/8°
Temperatures
17 km/h
Avg max wind
66 %
Avg humidity
Mercer County in October average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  19° | 2 17° | 3  21° | 4  23° | 5  22° | ||
| 6 22° | 7  20° | 8 18° | 9  18° | 10 16° | 11 19° | 12 21° |
| 13 21° | 14 19° | 15 12° | 16 15° | 17 14° | 18 19° | 19 21° |
| 20 22° | 21 25° | 22 28° | 23 24° | 24 15° | 25 16° | 26  17° |
| 27 12° | 28 15° | 29 14° | 30 19° | 31 23° |
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Temperatures trend during October in Mercer County
See the weather trend as well as the moving average line
October weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Oct. 1 | Overcast | 19° /14° | 0 mm | 4 | |
| Oct. 2 | Overcast | 17° /14° | 0 mm | 4 | |
| Oct. 3 | Cloudy | 21° /14° | 0 mm | 5 | |
| Oct. 4 | Fog | 23° /16° | 0 mm | 5 | |
| Oct. 5 | Partly cloudy | 22° /15° | 0 mm | 6 | |
| Oct. 6 | Partly cloudy | 22° /11° | 0 mm | 6 | |
| Oct. 7 | Moderate or heavy rain with thunder | 20° /12° | 8.3 mm | 5 | |
| Oct. 8 | Cloudy | 18° /8° | 0 mm | 4 | |
| Oct. 9 | Sunny | 18° /9° | 0 mm | 5 | |
| Oct. 10 | Sunny | 16° /6° | 0 mm | 5 | |
| Oct. 11 | Sunny | 19° /3° | 0 mm | 5 | |
| Oct. 12 | Overcast | 21° /10° | 0 mm | 5 | |
| Oct. 13 | Overcast | 21° /10° | 0 mm | 5 | |
| Oct. 14 | Partly cloudy | 19° /6° | 0 mm | 5 | |
| Oct. 15 | Cloudy | 12° /3° | 0 mm | 3 | |
| Oct. 16 | Sunny | 15° /3° | 0 mm | 5 | |
| Oct. 17 | Sunny | 14° /2° | 0 mm | 4 | |
| Oct. 18 | Sunny | 19° /5° | 0 mm | 5 | |
| Oct. 19 | Sunny | 21° /6° | 0 mm | 6 | |
| Oct. 20 | Mist | 22° /7° | 0 mm | 5 | |
| Oct. 21 | Sunny | 25° /8° | 0 mm | 7 | |
| Oct. 22 | Sunny | 28° /11° | 0 mm | 7 | |
| Oct. 23 | Mist | 24° /8° | 0 mm | 5 | |
| Oct. 24 | Overcast | 15° /6° | 0 mm | 4 | |
| Oct. 25 | Sunny | 16° /2° | 0 mm | 5 | |
| Oct. 26 | Light rain shower | 17° /9° | 1 mm | 4 | |
| Oct. 27 | Overcast | 12° /5° | 0 mm | 3 | |
| Oct. 28 | Sunny | 15° /1° | 0 mm | 5 | |
| Oct. 29 | Overcast | 14° /4° | 0 mm | 3 | |
| Oct. 30 | Fog | 19° /10° | 0 mm | 4 | |
| Oct. 31 | Fog | 23° /10° | 0 mm | 5 | |
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Important Notice
Our weather forecast for Mercer County in October is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Mercer County forecast closer to your planned date for the most up-to-date weather information.
Mercer County in October - FAQ
What are the expected maximum and minimum temperatures in Mercer County during October?
Enjoy moderate daytime temperatures of up to 19° and cooler nights around 8°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Mercer County during October?
Rainfall in Mercer County during October is rare to nonexistent, with the total expected rainfall being less than 10 mm and approximately 2 days seeing any precipitation. Planning without the concern for rain is generally straightforward during this very dry period.
What are the typical wind conditions in Mercer County during October?
The average wind speed in Mercer County during October is 17 km/h, suggesting breezy to windy conditions, depending on your activities.
October rainfall patterns in Mercer County
Explore the daily rainfall trends and prepare for Mercer Countys October weather 💧
UV exposure in Mercer County during October
Stay informed about UV levels for safe outdoor activities throughout the month of October ☀️
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Where is Mercer County?Get accurate weather forecasts for Mercer County, located at latitude 40.349 and longitude -74.659. Stay updated with localized weather information tailored for Mercer County.
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