Weather in New Castle County, Delaware for October 2026
Until now, October 2026 in New Castle County has been nearly identical to the historical average, with a temperature of 21.6 °F (showing only a slight deviation of 0.1 °F).
Expect cooler weather in the next days in New Castle County with the forecast suggesting a temperature of 17.5 °F, lower than the historical average.
In general, the average temperature in New Castle County at the beginning of October is 21.9 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 12.3 °F by the end of October.
New Castle County experiences moderate rainfall in October, with an average of 6 rainy days and a total precipitation of 347.4 mm.
Is October a good time to visit New Castle County? check out the best time to travel to New Castle County page.
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New Castle County Weather October
Temperatures trend during October in New Castle County
October weather in New Castle County day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Oct. 1 |  Sunny | 23° /14° | 0 mm | 4 | |
| Oct. 2 |  Partly cloudy | 25° /13° | 1.1 mm | 3 | |
| Oct. 3 |  Overcast | 20° /13° | 0 mm | 3 | |
| Oct. 4 | Sunny | 21° /12° | 1.5 mm | 3 | |
| Oct. 5 |  Fog | 24° /11° | 0 mm | 4 | |
| Oct. 6 | Mist | 19° /11° | 0 mm | 3 | |
| Oct. 7 | Mist | 21° /11° | 0 mm | 4 | |
| Oct. 8 |  Moderate or heavy rain shower | 22° /12° | 36 mm | 3 | |
| Oct. 9 | Sunny | 20° /9° | 0 mm | 3 | |
| Oct. 10 |  Cloudy | 15° /6° | 0 mm | 4 | |
| Oct. 11 |  Light rain | 17° /15° | 29.4 mm | 0.5 | |
| Oct. 12 | Sunny | 23° /14° | 1.1 mm | 1.7 | |
| Oct. 13 | Sunny | 24° /15° | 0 mm | 6 | |
| Oct. 14 | Sunny | 26° /17° | 0.4 mm | 7 | |
| Oct. 15 | Overcast | 18° /12° | 0 mm | 5 | |
| Oct. 16 | Sunny | 22° /13° | 0.6 mm | 6 | |
| Oct. 17 | Overcast | 21° /7° | 0.7 mm | 3 | |
| Oct. 18 | Sunny | 8° /3° | 0 mm | 3 | |
| Oct. 19 | Sunny | 10° /2° | 0 mm | 4 | |
| Oct. 20 | Sunny | 14° /5° | 0 mm | 4 | |
| Oct. 21 | Sunny | 15° /7° | 0 mm | 4 | |
| Oct. 22 | Sunny | 18° /8° | 0 mm | 5 | |
| Oct. 23 | Sunny | 18° /10° | 0 mm | 5 | |
| Oct. 24 | Sunny | 11° /6° | 0 mm | 4 | |
| Oct. 25 | Partly cloudy | 13° /4° | 0 mm | 2 | |
| Oct. 26 | Overcast | 14° /7° | 0 mm | 2 | |
| Oct. 27 | Overcast | 11° /8° | 0 mm | 1 | |
| Oct. 28 | Overcast | 10° /5° | 0 mm | 1 | |
| Oct. 29 | Moderate or heavy rain shower | 12° /8° | 85.7 mm | 0 | |
| Oct. 30 | Moderate or heavy rain shower | 12° /9° | 100.7 mm | 0 | |
| Oct. 31 | Overcast | 14° /7° | 0 mm | 2 | |
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New Castle County in October - FAQ
What are the expected maximum and minimum temperatures in New Castle County during October?
How much rainfall should be expected in New Castle County during October?
What are the typical wind conditions in New Castle County during October?
October rainfall patterns in New Castle County
UV exposure in New Castle County during October
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Where is New Castle County?Get accurate weather forecasts for New Castle County, located at latitude 39.746 and longitude -75.547. Stay updated with localized weather information tailored for New Castle County.