October is one of the warmer months of the year in New Castle, with average highs near 19.5°C and lows around 8.8°C (mean 14.2°C). It is about average for rainfall, averaging 90 mm of rainfall and 77% relative humidity across the period.
October is one of the warmer months of the year in New Castle. Across 45 years of records, the warmest October in New Castle was 2007 — when the month averaged 18.2°C — while the coldest was 1988 at 10.9°C. Typical October days reach 19.5°C with nights near 8.8°C. The long-term trend is warming, about 0.6°C per decade.
October is about average for rainfall in New Castle, averaging 90 mm of rainfall. The wettest October on record was 2005 with 196 mm, while the driest was 2024 at 1 mm.
Relative humidity in New Castle during October averages 77%. The most humid October was 2011 at 83%, and the least humid was 2024 at 64%.
October receives about 3.3 kWh/m²/day of solar energy in New Castle. The sunniest Octobers were 2001 and 2024 at 4 kWh/m²/day, and the cloudiest was 2002 at 2.7.
Average wind speed in New Castle during October is 2.5 m/s. The windiest Octobers were 2006, 2019 and 2025, among others at 2.9 m/s, while the calmest were 1994, 2023 and 2024, among others at 2.1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 13.4°C | 13.5°C | 14.0°C | 14.9°C | 15.5°C | +2.1°C |
| Avg High | 18.9°C | 19.0°C | 19.2°C | 19.8°C | 20.8°C | +1.9°C |
| Avg Low | 7.9°C | 8.0°C | 8.8°C | 9.8°C | 10.1°C | +2.2°C |
| Avg Rain | 76 mm | 82 mm | 102 mm | 101 mm | 86 mm | +10 mm |
October temperatures in New Castle have risen by about 1.4°C between 1981–1985 and 2021–2025.
October has ranged from a record low of -2.3°C (1988) to a record high of 34.9°C (2019).
Rainfall in October is about average for rainfall, averaging 90 mm, with a wettest year of 196 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.4°C per decade while lows rose 0.7°C per decade, narrowing the gap between day and night.
A good time to visit New Castle
October is a good time to visit New Castle, with days averaging 19.5°C and nights around 8.8°C (mean 14.2°C, warmer than New Castle's yearly average) and higher rainfall. June and September are marginally more temperate, but October still suits most travellers.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 20.4°C | 14.9°C | 9.4°C | 28.1°C | 4.0°C | 69 mm | 70% | 2.9 m/s | 3.6 |
| 2024 | 23.0°C | 16.4°C | 9.8°C | 29.1°C | 4.0°C | 1 mm | 64% | 2.1 m/s | 4 |
| 2023 | 21.1°C | 15.6°C | 10.2°C | 27.1°C | 5.4°C | 36 mm | 78% | 2.1 m/s | 3.5 |
| 2022 | 18.1°C | 13.1°C | 8.2°C | 23.4°C | 3.0°C | 143 mm | 81% | 2.6 m/s | 3.2 |
| 2021 | 22.6°C | 17.7°C | 12.8°C | 27.8°C | 6.4°C | 105 mm | 81% | 2.5 m/s | 3.1 |
| 2020 | 19.8°C | 15.1°C | 10.3°C | 25.0°C | -0.3°C | 160 mm | 81% | 2.3 m/s | 3.1 |
| 2019 | 22.2°C | 16.9°C | 11.6°C | 34.9°C | 4.4°C | 69 mm | 70% | 2.9 m/s | 3 |
| 2018 | 19.1°C | 14.6°C | 10.0°C | 28.3°C | 0.7°C | 99 mm | 82% | 2.6 m/s | 3.1 |
| 2017 | 22.6°C | 17.2°C | 11.7°C | 29.1°C | 4.0°C | 106 mm | 75% | 2.5 m/s | 3.3 |
| 2016 | 20.2°C | 14.9°C | 9.7°C | 27.5°C | 1.1°C | 56 mm | 78% | 2.5 m/s | 3.4 |
| 2015 | 18.3°C | 13.3°C | 8.2°C | 25.5°C | -0.4°C | 99 mm | 78% | 2.7 m/s | 3.4 |
| 2014 | 19.9°C | 14.8°C | 9.8°C | 26.5°C | 2.6°C | 77 mm | 77% | 2.8 m/s | 3.1 |
| 2013 | 20.1°C | 15.1°C | 10.0°C | 30.2°C | 0.1°C | 107 mm | 79% | 2.5 m/s | 3.2 |
| 2012 | 19.7°C | 14.8°C | 9.8°C | 27.9°C | 0.7°C | 193 mm | 79% | 2.6 m/s | 2.8 |
| 2011 | 17.9°C | 13.3°C | 8.6°C | 26.5°C | -0.9°C | 90 mm | 83% | 2.5 m/s | 3.2 |
| 2010 | 18.5°C | 13.6°C | 8.8°C | 25.2°C | 2.7°C | 113 mm | 82% | 2.7 m/s | 3.2 |
| 2009 | 17.3°C | 12.7°C | 8.1°C | 25.3°C | 0.3°C | 156 mm | 83% | 2.7 m/s | 2.9 |
| 2008 | 19.0°C | 13.4°C | 7.7°C | 28.0°C | -0.2°C | 49 mm | 73% | 2.5 m/s | 3.6 |
| 2007 🔥 | 23.5°C | 18.2°C | 12.8°C | 31.8°C | 2.0°C | 140 mm | 76% | 2.4 m/s | 3.3 |
| 2006 | 18.3°C | 13.1°C | 8.0°C | 27.6°C | 0.7°C | 113 mm | 76% | 2.9 m/s | 3.3 |
| 2005 🌧️ | 19.7°C | 15.0°C | 10.3°C | 28.7°C | 2.1°C | 196 mm | 81% | 2.9 m/s | 2.8 |
| 2004 | 18.2°C | 13.4°C | 8.6°C | 23.9°C | 3.0°C | 47 mm | 82% | 2.2 m/s | 3.1 |
| 2003 | 17.7°C | 12.6°C | 7.6°C | 23.8°C | 0.0°C | 114 mm | 81% | 2.6 m/s | 3.3 |
| 2002 | 18.3°C | 13.7°C | 9.2°C | 29.8°C | 1.3°C | 174 mm | 80% | 2.6 m/s | 2.7 |
| 2001 | 20.5°C | 14.4°C | 8.2°C | 27.5°C | -0.4°C | 21 mm | 67% | 2.8 m/s | 4 |
| 2000 | 19.5°C | 13.6°C | 7.6°C | 26.9°C | 0.5°C | 14 mm | 75% | 2.3 m/s | 3.6 |
| 1999 | 17.7°C | 12.4°C | 7.1°C | 24.5°C | 2.3°C | 85 mm | 82% | 2.4 m/s | 3.5 |
| 1998 | 19.7°C | 14.2°C | 8.6°C | 26.7°C | 2.5°C | 65 mm | 71% | 2.6 m/s | 3.2 |
| 1997 | 19.7°C | 14.0°C | 8.3°C | 30.8°C | -0.2°C | 66 mm | 71% | 2.4 m/s | 3.5 |
| 1996 | 18.0°C | 12.8°C | 7.6°C | 25.0°C | 1.9°C | 133 mm | 81% | 2.5 m/s | 3.3 |
| 1995 | 20.9°C | 15.3°C | 9.8°C | 28.0°C | 2.8°C | 163 mm | 78% | 2.6 m/s | 3.5 |
| 1994 | 18.5°C | 12.6°C | 6.8°C | 24.7°C | 2.8°C | 30 mm | 74% | 2.1 m/s | 3.6 |
| 1993 | 18.0°C | 12.6°C | 7.2°C | 25.3°C | 1.2°C | 91 mm | 77% | 2.5 m/s | 3.3 |
| 1992 | 17.1°C | 11.7°C | 6.2°C | 24.1°C | -2.1°C | 44 mm | 76% | 2.5 m/s | 3.1 |
| 1991 | 19.5°C | 13.9°C | 8.2°C | 27.2°C | 0.1°C | 53 mm | 77% | 2.4 m/s | 3.4 |
| 1990 | 21.2°C | 15.7°C | 10.2°C | 28.4°C | -1.3°C | 88 mm | 74% | 2.9 m/s | 3.6 |
| 1989 | 19.1°C | 13.7°C | 8.2°C | 25.4°C | 2.0°C | 115 mm | 82% | 2.4 m/s | 3.3 |
| 1988 ❄️ | 16.5°C | 10.9°C | 5.3°C | 26.5°C | -2.3°C | 61 mm | 71% | 2.6 m/s | 3.5 |
| 1987 | 17.1°C | 11.0°C | 4.9°C | 22.2°C | -0.5°C | 70 mm | 74% | 2.6 m/s | 3.5 |
| 1986 | 19.9°C | 14.3°C | 8.7°C | 29.6°C | 0.9°C | 72 mm | 73% | 2.3 m/s | 3.2 |
| 1985 | 19.3°C | 14.1°C | 9.0°C | 25.5°C | -1.8°C | 55 mm | 79% | 2.4 m/s | 3.2 |
| 1984 | 21.7°C | 16.6°C | 11.5°C | 27.5°C | 4.8°C | 75 mm | 77% | 2.1 m/s | 3.4 |
| 1983 | 19.1°C | 14.0°C | 8.9°C | 28.9°C | -1.6°C | 105 mm | 75% | 2.6 m/s | — |
| 1982 | 19.7°C | 13.9°C | 8.1°C | 28.1°C | -0.4°C | 51 mm | 70% | 2.5 m/s | — |
| 1981 | 17.8°C | 12.0°C | 6.2°C | 26.6°C | 1.4°C | 80 mm | 72% | 2.8 m/s | — |
Actual recorded October data for each year, 1981–2025 — sourced from NASA POWER.
The average high in October is around 19.5°C with lows near 8.8°C (mean 14.2°C), based on 45 years of NASA POWER data.
October averages 90 mm of rainfall in New Castle, about average for rainfall. The wettest on record was 196 mm in 2005.
The hottest October reached 34.9°C in 2019. The coldest dipped to -2.3°C in 1988.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average October temperatures have risen by about 1.4°C. Daytime highs moved from 19.5°C to 21°C and overnight lows from 8.7°C to 10.1°C over the same span.
October is one of the warmer months of the year in New Castle and about average for rainfall, so plan for around 19.5°C daytime highs and 8.8°C at night.
Not quite — October is the 7th coolest month in New Castle, averaging 14.2°C.
For October in New Castle, pack light layers you can adjust through the day, with typical highs of 19.5°C and lows of 8.8°C. Bring an umbrella or light rain jacket too.
Relative humidity in October averages 77% — quite humid.
Average wind speed in October is 2.5 m/s. The windiest October on record averaged 2.9 m/s (1990).
The wettest October on record was 2005 with 196 mm. On average, October sees 90 mm.
All figures are derived from NASA POWER (Prediction Of Worldwide Energy Resources), based on MERRA-2 satellite reanalysis, covering 1981–2025.
Explore how the weather in New Castle behaves each October, based on 45 years of NASA POWER climate data from 1981 to 2025. This page breaks down average temperatures, rainfall, humidity, wind and solar radiation for October specifically, along with year-by-year records and how the month has changed over the decades.
