October is one of the warmer months of the year in Derry, with average highs near 11.9°C and lows around 7.7°C (mean 9.8°C). It is a relatively wet time of year, averaging 129 mm of rainfall and 90% relative humidity across the period.
October is one of the warmer months of the year in Derry. Across 45 years of records, the warmest October in Derry was 2001 — when the month averaged 11.5°C — while the coldest was 1981 at 7.1°C. Typical October days reach 11.9°C with nights near 7.7°C. The long-term trend is warming, about 0.3°C per decade.
October is a relatively wet time of year in Derry, averaging 129 mm of rainfall. The wettest October on record was 1990 with 215 mm, while the driest was 2016 at 43 mm.
Relative humidity in Derry during October averages 90%. The most humid October was 2006 at 91%, and the least humid was 1981 at 87%.
October receives about 1.5 kWh/m²/day of solar energy in Derry. The sunniest Octobers were 2015, 2019 and 2020, among others at 1.7 kWh/m²/day, and the cloudiest were 2011, 2017 and 2025, among others at 1.3.
Average wind speed in Derry during October is 4.8 m/s. The windiest October was 1983 at 6.2 m/s, while the calmest was 1993 at 3.4 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 9.2°C | 9.5°C | 10.1°C | 9.9°C | 10.6°C | +1.4°C |
| Avg High | 11.3°C | 11.6°C | 12.2°C | 12.1°C | 12.7°C | +1.4°C |
| Avg Low | 7.1°C | 7.5°C | 8.1°C | 7.7°C | 8.5°C | +1.4°C |
| Avg Rain | 141 mm | 125 mm | 134 mm | 113 mm | 137 mm | -3 mm |
October temperatures in Derry have risen by about 1.8°C between 1981–1985 and 2021–2025.
October has ranged from a record low of 0°C (1993) to a record high of 18.9°C (1985).
Rainfall in October is a relatively wet time of year, averaging 129 mm, with a wettest year of 215 mm.
A good time to visit Derry
October is a good time to visit Derry, with days averaging 11.9°C and nights around 7.7°C (mean 9.8°C, close to Derry's yearly average) and higher rainfall. July and August 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 | 12.5°C | 10.7°C | 8.8°C | 17.7°C | 5.9°C | 126 mm | 89% | 4.9 m/s | 1.3 |
| 2024 | 13.1°C | 10.6°C | 8.2°C | 16.2°C | 4.6°C | 79 mm | 91% | 4.8 m/s | 1.5 |
| 2023 | 13.0°C | 10.9°C | 8.8°C | 18.8°C | 4.6°C | 130 mm | 90% | 4.7 m/s | 1.6 |
| 2022 | 13.2°C | 11.1°C | 9.0°C | 16.0°C | 6.0°C | 170 mm | 91% | 5.1 m/s | 1.4 |
| 2021 | 13.1°C | 11.0°C | 8.9°C | 18.0°C | 5.2°C | 140 mm | 90% | 4.5 m/s | 1.6 |
| 2020 | 11.2°C | 9.3°C | 7.3°C | 14.1°C | 4.6°C | 179 mm | 89% | 5 m/s | 1.7 |
| 2019 | 11.1°C | 9.0°C | 7.0°C | 15.0°C | 2.6°C | 95 mm | 89% | 4.8 m/s | 1.7 |
| 2018 | 11.6°C | 9.3°C | 7.0°C | 17.7°C | 2.6°C | 94 mm | 88% | 5 m/s | 1.6 |
| 2017 | 12.7°C | 10.7°C | 8.7°C | 15.5°C | 4.6°C | 142 mm | 91% | 5.4 m/s | 1.3 |
| 2016 | 12.3°C | 10.0°C | 7.7°C | 15.2°C | 5.1°C | 43 mm | 90% | 4 m/s | 1.6 |
| 2015 | 12.6°C | 10.1°C | 7.6°C | 16.3°C | 5.8°C | 66 mm | 89% | 3.8 m/s | 1.7 |
| 2014 | 12.6°C | 10.3°C | 8.0°C | 15.7°C | 5.2°C | 151 mm | 89% | 5.1 m/s | 1.6 |
| 2013 | 12.8°C | 10.8°C | 8.7°C | 18.0°C | 3.7°C | 118 mm | 91% | 4.7 m/s | 1.5 |
| 2012 | 10.3°C | 8.2°C | 6.1°C | 13.0°C | 1.9°C | 127 mm | 89% | 3.6 m/s | 1.7 |
| 2011 | 12.5°C | 10.5°C | 8.6°C | 15.9°C | 5.1°C | 212 mm | 91% | 5.4 m/s | 1.3 |
| 2010 | 12.2°C | 9.7°C | 7.2°C | 17.6°C | 1.0°C | 84 mm | 90% | 4.6 m/s | 1.7 |
| 2009 | 12.8°C | 10.7°C | 8.6°C | 15.4°C | 5.4°C | 118 mm | 90% | 4.4 m/s | 1.5 |
| 2008 | 11.0°C | 8.9°C | 6.9°C | 15.7°C | 2.2°C | 173 mm | 88% | 5.6 m/s | 1.6 |
| 2007 | 13.5°C | 11.4°C | 9.2°C | 17.0°C | 5.2°C | 76 mm | 91% | 4.2 m/s | 1.6 |
| 2006 | 13.6°C | 11.4°C | 9.2°C | 16.8°C | 6.3°C | 151 mm | 91% | 4.6 m/s | 1.5 |
| 2005 | 13.1°C | 11.0°C | 8.9°C | 16.8°C | 5.2°C | 131 mm | 90% | 5.1 m/s | 1.4 |
| 2004 | 10.8°C | 9.0°C | 7.2°C | 13.5°C | 2.6°C | 152 mm | 90% | 4.5 m/s | 1.6 |
| 2003 | 11.2°C | 9.0°C | 6.9°C | 14.7°C | 3.0°C | 61 mm | 89% | 4.6 m/s | 1.6 |
| 2002 | 11.1°C | 9.1°C | 7.1°C | 17.9°C | 2.5°C | 188 mm | 90% | 4.3 m/s | 1.4 |
| 2001 🔥 | 13.5°C | 11.5°C | 9.4°C | 16.7°C | 6.6°C | 109 mm | 91% | 5.5 m/s | 1.4 |
| 2000 | 11.1°C | 9.1°C | 7.2°C | 18.1°C | 4.8°C | 184 mm | 89% | 5.8 m/s | 1.3 |
| 1999 | 12.0°C | 10.1°C | 8.2°C | 16.2°C | 5.0°C | 69 mm | 89% | 5.3 m/s | 1.4 |
| 1998 | 11.7°C | 9.6°C | 7.6°C | 15.4°C | 4.4°C | 169 mm | 87% | 5.6 m/s | 1.6 |
| 1997 | 12.1°C | 10.0°C | 7.8°C | 16.8°C | 2.7°C | 78 mm | 90% | 4 m/s | 1.5 |
| 1996 | 12.3°C | 10.4°C | 8.5°C | 16.5°C | 5.6°C | 178 mm | 91% | 5.6 m/s | 1.4 |
| 1995 | 13.4°C | 11.2°C | 9.0°C | 17.9°C | 4.0°C | 196 mm | 90% | 5.5 m/s | 1.5 |
| 1994 | 12.0°C | 9.9°C | 7.7°C | 15.3°C | 4.1°C | 74 mm | 91% | 4.5 m/s | 1.7 |
| 1993 | 9.5°C | 7.2°C | 5.0°C | 13.1°C | 0.0°C | 47 mm | 89% | 3.4 m/s | 1.7 |
| 1992 | 9.5°C | 7.5°C | 5.6°C | 14.7°C | 2.4°C | 107 mm | 89% | 4 m/s | 1.6 |
| 1991 | 11.1°C | 9.0°C | 6.9°C | 15.4°C | 5.0°C | 115 mm | 89% | 5.2 m/s | 1.5 |
| 1990 🌧️ | 12.0°C | 10.2°C | 8.4°C | 17.3°C | 4.2°C | 215 mm | 90% | 5.5 m/s | 1.3 |
| 1989 | 12.2°C | 10.3°C | 8.4°C | 16.3°C | 3.7°C | 214 mm | 90% | 5.1 m/s | 1.3 |
| 1988 | 11.7°C | 9.5°C | 7.3°C | 15.3°C | 1.3°C | 128 mm | 91% | 4.6 m/s | 1.4 |
| 1987 | 10.2°C | 8.0°C | 5.9°C | 15.3°C | 2.8°C | 138 mm | 90% | 4.3 m/s | 1.7 |
| 1986 | 11.8°C | 9.5°C | 7.2°C | 16.3°C | 3.2°C | 127 mm | 89% | 5.5 m/s | 1.6 |
| 1985 | 12.3°C | 10.1°C | 7.9°C | 18.9°C | 3.1°C | 60 mm | 91% | 3.9 m/s | 1.7 |
| 1984 | 11.7°C | 9.5°C | 7.3°C | 16.5°C | 3.9°C | 148 mm | 89% | 5 m/s | 1.6 |
| 1983 | 11.6°C | 9.6°C | 7.5°C | 17.3°C | 2.1°C | 167 mm | 87% | 6.2 m/s | — |
| 1982 | 11.3°C | 9.2°C | 7.0°C | 14.5°C | 3.0°C | 128 mm | 89% | 5.1 m/s | — |
| 1981 ❄️ | 9.0°C | 7.1°C | 5.1°C | 12.1°C | 1.9°C | 158 mm | 87% | 5.3 m/s | — |
Actual recorded October data for each year, 1981–2025 — sourced from NASA POWER.
The average high in October is around 11.9°C with lows near 7.7°C (mean 9.8°C), based on 45 years of NASA POWER data.
October averages 129 mm of rainfall in Derry, a relatively wet time of year. The wettest on record was 215 mm in 1990.
The hottest October reached 18.9°C in 1985. The coldest dipped to 0°C in 1993.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average October temperatures have risen by about 1.8°C. Daytime highs moved from 11.2°C to 13°C and overnight lows from 7°C to 8.7°C over the same span.
October is one of the warmer months of the year in Derry and a relatively wet time of year, so plan for around 11.9°C daytime highs and 7.7°C at night.
Not quite — October is the 7th coolest month in Derry, averaging 9.8°C.
For October in Derry, pack warm layers and a jacket for chilly mornings, with typical highs of 11.9°C and lows of 7.7°C. Bring an umbrella or light rain jacket too.
Relative humidity in October averages 90% — quite humid.
Average wind speed in October is 4.8 m/s. The windiest October on record averaged 6.2 m/s (1983).
The wettest October on record was 1990 with 215 mm. On average, October sees 129 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 Derry 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.
