October is one of the warmer months of the year in Thornton, with average highs near 12.7°C and lows around 9.2°C (mean 11°C). It is a relatively wet time of year, averaging 122 mm of rainfall and 87% relative humidity across the period.
October is one of the warmer months of the year in Thornton. Across 45 years of records, the warmest October in Thornton was 2001 — when the month averaged 12.9°C — while the coldest was 1992 at 8.1°C. Typical October days reach 12.7°C with nights near 9.2°C. The long-term trend is warming, about 0.4°C per decade.
October is a relatively wet time of year in Thornton, averaging 122 mm of rainfall. The wettest October on record was 2000 with 197 mm, while the driest was 2016 at 45 mm.
Relative humidity in Thornton during October averages 87%. The most humid Octobers were 2001 and 2013 at 89%, and the least humid were 1981 and 1983 at 85%.
October receives about 1.6 kWh/m²/day of solar energy in Thornton. The sunniest Octobers were 2010, 2016 and 2024, among others at 1.8 kWh/m²/day, and the cloudiest was 2000 at 1.3.
Average wind speed in Thornton during October is 5.2 m/s. The windiest October was 1983 at 6.7 m/s, while the calmest was 2007 at 3.7 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 10.4°C | 10.4°C | 11.3°C | 11.1°C | 11.8°C | +1.4°C |
| Avg High | 12.1°C | 12.2°C | 13.0°C | 13.0°C | 13.5°C | +1.4°C |
| Avg Low | 8.7°C | 8.6°C | 9.5°C | 9.2°C | 10.1°C | +1.4°C |
| Avg Rain | 128 mm | 112 mm | 128 mm | 111 mm | 140 mm | +12 mm |
October temperatures in Thornton have risen by about 1.7°C between 1981–1985 and 2021–2025.
October has ranged from a record low of 1.8°C (1988) to a record high of 19.5°C (1985).
Rainfall in October is a relatively wet time of year, averaging 122 mm, with a wettest year of 197 mm.
A good time to visit Thornton
October is a good time to visit Thornton, with days averaging 12.7°C and nights around 9.2°C (mean 11°C, warmer than Thornton'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 | 13.2°C | 11.7°C | 10.1°C | 16.9°C | 6.5°C | 104 mm | 86% | 5.1 m/s | 1.4 |
| 2024 | 13.4°C | 11.5°C | 9.6°C | 15.5°C | 5.7°C | 109 mm | 88% | 4.8 m/s | 1.8 |
| 2023 | 13.6°C | 11.9°C | 10.2°C | 17.3°C | 5.7°C | 133 mm | 89% | 5 m/s | 1.6 |
| 2022 | 14.4°C | 12.7°C | 11.0°C | 16.3°C | 9.2°C | 133 mm | 87% | 5.6 m/s | 1.7 |
| 2021 | 13.9°C | 12.3°C | 10.8°C | 17.1°C | 6.5°C | 193 mm | 87% | 5.5 m/s | 1.5 |
| 2020 | 12.3°C | 10.6°C | 8.9°C | 14.9°C | 6.9°C | 167 mm | 87% | 5.5 m/s | 1.5 |
| 2019 | 11.9°C | 10.2°C | 8.5°C | 14.6°C | 4.1°C | 133 mm | 87% | 4.9 m/s | 1.7 |
| 2018 | 12.7°C | 10.7°C | 8.6°C | 18.8°C | 2.6°C | 111 mm | 86% | 5.1 m/s | 1.7 |
| 2017 | 13.7°C | 12.2°C | 10.6°C | 17.6°C | 5.5°C | 141 mm | 88% | 6 m/s | 1.4 |
| 2016 | 13.0°C | 11.0°C | 9.0°C | 16.1°C | 7.1°C | 45 mm | 88% | 4.2 m/s | 1.8 |
| 2015 | 13.2°C | 11.1°C | 8.9°C | 17.2°C | 6.4°C | 69 mm | 87% | 3.9 m/s | 1.7 |
| 2014 | 13.8°C | 12.0°C | 10.3°C | 17.1°C | 5.8°C | 142 mm | 87% | 5.7 m/s | 1.6 |
| 2013 | 13.7°C | 11.9°C | 10.1°C | 16.6°C | 6.6°C | 136 mm | 89% | 5.8 m/s | 1.4 |
| 2012 | 11.2°C | 9.3°C | 7.5°C | 14.0°C | 2.5°C | 123 mm | 87% | 4.5 m/s | 1.7 |
| 2011 | 13.6°C | 12.0°C | 10.3°C | 19.0°C | 6.4°C | 117 mm | 88% | 5.8 m/s | 1.5 |
| 2010 | 12.7°C | 10.7°C | 8.6°C | 17.9°C | 3.7°C | 92 mm | 87% | 5 m/s | 1.8 |
| 2009 | 13.2°C | 11.4°C | 9.7°C | 15.3°C | 6.5°C | 92 mm | 88% | 4.7 m/s | 1.6 |
| 2008 | 11.7°C | 10.1°C | 8.6°C | 15.3°C | 3.0°C | 170 mm | 87% | 6 m/s | 1.6 |
| 2007 | 13.4°C | 11.6°C | 9.7°C | 15.6°C | 5.7°C | 55 mm | 88% | 3.7 m/s | 1.7 |
| 2006 | 14.5°C | 12.7°C | 10.9°C | 16.3°C | 6.4°C | 139 mm | 89% | 5.3 m/s | 1.6 |
| 2005 | 14.5°C | 12.7°C | 10.8°C | 17.6°C | 8.4°C | 151 mm | 88% | 5 m/s | 1.4 |
| 2004 | 12.4°C | 10.8°C | 9.1°C | 15.6°C | 7.1°C | 145 mm | 88% | 5.3 m/s | 1.5 |
| 2003 | 11.7°C | 9.8°C | 7.8°C | 16.6°C | 3.3°C | 52 mm | 85% | 5.3 m/s | 1.8 |
| 2002 | 11.9°C | 10.1°C | 8.3°C | 18.1°C | 4.1°C | 147 mm | 87% | 5.2 m/s | 1.6 |
| 2001 🔥 | 14.6°C | 12.9°C | 11.3°C | 17.0°C | 8.7°C | 129 mm | 89% | 6 m/s | 1.7 |
| 2000 🌧️ | 12.2°C | 10.5°C | 8.8°C | 17.5°C | 5.1°C | 197 mm | 87% | 5.8 m/s | 1.3 |
| 1999 | 12.6°C | 10.9°C | 9.2°C | 15.2°C | 5.6°C | 87 mm | 86% | 5.6 m/s | 1.6 |
| 1998 | 12.1°C | 10.2°C | 8.4°C | 16.3°C | 4.3°C | 185 mm | 85% | 6.4 m/s | 1.5 |
| 1997 | 12.5°C | 10.6°C | 8.6°C | 17.0°C | 2.3°C | 70 mm | 87% | 4.5 m/s | 1.7 |
| 1996 | 13.2°C | 11.5°C | 9.8°C | 17.0°C | 6.9°C | 145 mm | 87% | 6.1 m/s | 1.6 |
| 1995 | 14.5°C | 12.7°C | 10.9°C | 18.7°C | 6.7°C | 92 mm | 88% | 5.9 m/s | 1.7 |
| 1994 | 12.1°C | 10.2°C | 8.3°C | 15.4°C | 4.2°C | 105 mm | 88% | 4.9 m/s | 1.8 |
| 1993 | 10.4°C | 8.3°C | 6.3°C | 13.8°C | 1.8°C | 65 mm | 86% | 3.8 m/s | 1.7 |
| 1992 ❄️ | 9.8°C | 8.1°C | 6.4°C | 14.2°C | 2.6°C | 93 mm | 86% | 4.5 m/s | 1.5 |
| 1991 | 12.0°C | 10.4°C | 8.8°C | 17.4°C | 4.3°C | 129 mm | 86% | 5.2 m/s | 1.6 |
| 1990 | 13.1°C | 11.4°C | 9.7°C | 17.7°C | 6.8°C | 151 mm | 88% | 6.2 m/s | 1.4 |
| 1989 | 13.4°C | 11.6°C | 9.9°C | 15.1°C | 6.5°C | 122 mm | 86% | 5.6 m/s | 1.4 |
| 1988 | 12.1°C | 10.3°C | 8.6°C | 16.0°C | 1.8°C | 122 mm | 88% | 5 m/s | 1.6 |
| 1987 | 11.3°C | 9.5°C | 7.8°C | 15.5°C | 4.7°C | 161 mm | 87% | 4.7 m/s | 1.5 |
| 1986 | 12.2°C | 10.6°C | 9.0°C | 15.3°C | 5.2°C | 124 mm | 88% | 5.4 m/s | 1.7 |
| 1985 | 12.8°C | 11.1°C | 9.5°C | 19.5°C | 5.0°C | 59 mm | 87% | 4.1 m/s | 1.6 |
| 1984 | 12.5°C | 11.0°C | 9.5°C | 15.7°C | 7.0°C | 141 mm | 87% | 5.6 m/s | 1.5 |
| 1983 | 12.1°C | 10.4°C | 8.7°C | 16.6°C | 2.4°C | 127 mm | 85% | 6.7 m/s | — |
| 1982 | 12.1°C | 10.3°C | 8.6°C | 14.8°C | 6.1°C | 127 mm | 87% | 4.9 m/s | — |
| 1981 | 10.2°C | 8.5°C | 6.9°C | 15.4°C | 3.7°C | 167 mm | 85% | 5.3 m/s | — |
Actual recorded October data for each year, 1981–2025 — sourced from NASA POWER.
The average high in October is around 12.7°C with lows near 9.2°C (mean 11°C), based on 45 years of NASA POWER data.
October averages 122 mm of rainfall in Thornton, a relatively wet time of year. The wettest on record was 197 mm in 2000.
The hottest October reached 19.5°C in 1985. The coldest dipped to 1.8°C in 1988.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average October temperatures have risen by about 1.7°C. Daytime highs moved from 11.9°C to 13.7°C and overnight lows from 8.6°C to 10.3°C over the same span.
October is one of the warmer months of the year in Thornton and a relatively wet time of year, so plan for around 12.7°C daytime highs and 9.2°C at night.
Not quite — October is the 8th coolest month in Thornton, averaging 11°C.
For October in Thornton, pack light layers you can adjust through the day, with typical highs of 12.7°C and lows of 9.2°C. Bring an umbrella or light rain jacket too.
Relative humidity in October averages 87% — quite humid.
Average wind speed in October is 5.2 m/s. The windiest October on record averaged 6.7 m/s (1983).
The wettest October on record was 2000 with 197 mm. On average, October sees 122 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 Thornton 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.
